Merge branch 'master' into python

.github/workflows/cd.yml

@@ -123,8 +123,8 @@ jobs:
     - name: Set Up Source
       run: rsync --filter=":- .gitignore" -r ./ pkg/snap/solvespace-snap-src
     - name: Build Snap
+      uses: snapcore/action-build@v1
       id: build
-      uses: diddlesnaps/snapcraft-multiarch-action@v1
       with:
         path: pkg/snap
     - name: Upload & Release to Edge
@@ -142,40 +142,6 @@ jobs:
         snap: ${{ steps.build.outputs.snap }}
         release: edge,beta
 
-  deploy_snap_arm64:
-    needs: [test_ubuntu, test_windows, test_macos]
-    name: Deploy ARM64 Snap
-    runs-on: ubuntu-latest
-    steps:
-    - uses: docker/setup-qemu-action@v1
-      with:
-        image: tonistiigi/binfmt@sha256:df15403e06a03c2f461c1f7938b171fda34a5849eb63a70e2a2109ed5a778bde
-    - uses: actions/checkout@v2
-    - name: Fetch Tags
-      run: git fetch --force --tags
-    - name: Set Up Source
-      run: rsync --filter=":- .gitignore" -r ./ pkg/snap/solvespace-snap-src
-    - name: Build Snap
-      id: build
-      uses: diddlesnaps/snapcraft-multiarch-action@v1
-      with:
-        path: pkg/snap
-        architecture: arm64
-    - name: Upload & Release to Edge
-      if: github.event_name == 'push'
-      uses: snapcore/action-publish@v1
-      with:
-        store_login: ${{ secrets.SNAPSTORE_LOGIN }}
-        snap: ${{ steps.build.outputs.snap }}
-        release: edge
-    - name: Upload & Release to Beta + Edge
-      if: github.event_name == 'release'
-      uses: snapcore/action-publish@v1
-      with:
-        store_login: ${{ secrets.SNAPSTORE_LOGIN }}
-        snap: ${{ steps.build.outputs.snap }}
-        release: edge,beta
-
   upload_release_assets:
     name: Upload Release Assets
     needs: [build_release_windows, build_release_windows_openmp, build_release_macos]

.github/workflows/source-tarball.yml

@@ -21,6 +21,11 @@ jobs:
         dir_name="solvespace-${version}"
         archive_name="${dir_name}.tar.xz"
         archive_path="${HOME}/${archive_name}"
+        commit_sha="$GITHUB_SHA"
+
+        sed -e 's/^\(include(GetGitCommitHash)\)/#\1/' \
+            -e 's/^# \(set(GIT_COMMIT_HASH\).*/\1 '"$commit_sha"')/' \
+            -i CMakeLists.txt
 
         echo "::set-output name=archive_name::${archive_name}"
         echo "::set-output name=archive_path::${archive_path}"

.github/workflows/test.yml

@@ -42,3 +42,20 @@ jobs:
       run: .github/scripts/install-macos.sh ci
     - name: Build & Test
       run: .github/scripts/build-macos.sh debug arm64 && .github/scripts/build-macos.sh debug x86_64
+
+  test_flatpak:
+    name: Test Flatpak x86_64
+    runs-on: ubuntu-latest
+    container:
+      image: bilelmoussaoui/flatpak-github-actions:freedesktop-21.08
+      options: --privileged
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+          fetch-depth: 0
+      - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@v4
+        with:
+          bundle: "solvespace.flatpak"
+          manifest-path: "pkg/flatpak/com.solvespace.SolveSpace.json"
+          cache-key: flatpak-builder-${{ github.sha }}

CHANGELOG.md

@@ -1,7 +1,7 @@
 Changelog
 =========
 
-3.x  - since the 3.0 release, only available in edge builds
+3.1
 ---
 
 Constraints:

CMakeLists.txt

@@ -40,7 +40,7 @@ include(GetGitCommitHash)
 
 string(SUBSTRING "${GIT_COMMIT_HASH}" 0 8 solvespace_GIT_HASH)
 project(solvespace
-    VERSION 3.0
+    VERSION 3.1
     LANGUAGES C CXX ASM)
 
 set(ENABLE_GUI        ON CACHE BOOL
@@ -91,6 +91,10 @@ endif()
 if(MINGW)
     set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -static-libgcc")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
+    # Link 32 bit SolveSpace with --large-address-aware which allows it to access
+    # up to 3GB on a properly configured 32 bit Windows and up to 4GB on 64 bit.
+    # See https://msdn.microsoft.com/en-us/library/aa366778
+    set(CMAKE_EXE_LINKER_FLAGS "-Wl,--large-address-aware")
 endif()
 
 # Ensure that all platforms use 64-bit IEEE floating point operations for consistency;
@@ -182,12 +186,13 @@ if(APPLE)
     set(CMAKE_FIND_FRAMEWORK LAST)
 endif()
 
+if(EMSCRIPTEN)
+    set(M_LIBRARY "" CACHE STRING "libm (not necessary)" FORCE)
+endif()
+
 message(STATUS "Using in-tree libdxfrw")
 add_subdirectory(extlib/libdxfrw)
 
-message(STATUS "Using in-tree eigen")
-include_directories(extlib/eigen)
-
 message(STATUS "Using in-tree mimalloc")
 set(MI_OVERRIDE OFF CACHE BOOL "")
 set(MI_BUILD_SHARED OFF CACHE BOOL "")
@@ -199,16 +204,19 @@ set(MIMALLOC_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/extlib/mimalloc/include)
 if(NOT FORCE_VENDORED_Eigen3)
     find_package(Eigen3 CONFIG)
 endif()
-if(FORCE_VENDORED_Eigen3 OR NOT EIGEN3_FOUND)
+if(FORCE_VENDORED_Eigen3 OR NOT EIGEN3_INCLUDE_DIRS)
     message(STATUS "Using in-tree Eigen")
     set(EIGEN3_FOUND             YES)
     set(EIGEN3_INCLUDE_DIRS      ${CMAKE_SOURCE_DIR}/extlib/eigen)
 else()
     message(STATUS "Using system Eigen: ${EIGEN3_INCLUDE_DIRS}")
 endif()
+if(NOT EXISTS "${EIGEN3_INCLUDE_DIRS}")
+    message(FATAL_ERROR "Eigen 3 not found on system or in-tree")
+endif()
 
 
-if(WIN32 OR APPLE)
+if(WIN32 OR APPLE OR EMSCRIPTEN)
     # On Win32 and macOS we use vendored packages, since there is little to no benefit
     # to trying to find system versions. In particular, trying to link to libraries from
     # Homebrew or macOS system libraries into the .app file is highly likely to result
@@ -269,7 +277,7 @@ else()
     find_package(ZLIB REQUIRED)
     find_package(PNG REQUIRED)
     find_package(Freetype REQUIRED)
-    pkg_check_modules(CAIRO REQUIRED cairo)
+    find_package(Cairo REQUIRED)
 endif()
 
 # GUI dependencies
@@ -303,6 +311,8 @@ if(ENABLE_GUI)
     elseif(APPLE)
         find_package(OpenGL REQUIRED)
         find_library(APPKIT_LIBRARY AppKit REQUIRED)
+    elseif(EMSCRIPTEN)
+        # Everything is built in
     else()
         find_package(OpenGL REQUIRED)
         find_package(SpaceWare)
@@ -373,9 +383,19 @@ if(MSVC)
     # Same for the (C99) __func__ special variable; we use it only in C++ code.
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D__func__=__FUNCTION__")
 
+    # Multi-processor Compilation
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
+
     # We rely on these /we flags. They correspond to the GNU-style flags below as
     # follows: /w4062=-Wswitch
     set(WARNING_FLAGS   "${WARNING_FLAGS} /we4062")
+
+    # Link 32 bit SolveSpace with /LARGEADDRESSAWARE which allows it to access
+    # up to 3GB on a properly configured 32 bit Windows and up to 4GB on 64 bit.
+    # See https://msdn.microsoft.com/en-us/library/aa366778
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /LARGEADDRESSAWARE")
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /LARGEADDRESSAWARE")
 endif()
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")

README.md

@@ -33,6 +33,14 @@ automatically built by the SolveSpace maintainers for each stable release.
 
 [rel]: https://github.com/solvespace/solvespace/releases
 
+### Via Flathub
+
+Official releases can be installed as a Flatpak from Flathub.
+
+[Get SolveSpace from Flathub](https://flathub.org/apps/details/com.solvespace.SolveSpace)
+
+These should work on any Linux distribution that supports Flatpak.
+
 ### Via Snap Store
 
 Official releases can be installed from the `stable` channel.
@@ -68,18 +76,18 @@ from the following links:
 Extract the downloaded archive and install or execute the contained file as is
 appropriate for your platform.
 
-### Via third-party packages
-
-_Third-party_ nightly binary packages for Debian and Ubuntu are available via
-[notesalexp.org][notesalexp]. These packages are automatically built from
-non-released source code. The SolveSpace maintainers do not control the contents
-of these packages and cannot guarantee their functionality.
-
-[notesalexp]: https://notesalexp.org/packages/en/source/solvespace/
-
 ### Via source code
 
-See below.
+Irrespective of the OS used, before building, check out the project and the
+necessary submodules:
+
+```sh
+git clone https://github.com/solvespace/solvespace
+cd solvespace
+git submodule update --init
+```
+
+You will need `git`. See the platform specific instructions below to install it.
 
 ## Building on Linux
 
@@ -106,13 +114,7 @@ sudo dnf install git gcc-c++ cmake zlib-devel libpng-devel \
             mesa-libGL-devel mesa-libGLU-devel libspnav-devel
 ```
 
-Before building, check out the project and the necessary submodules:
+Before building, [check out the project and the necessary submodules](#via-source-code).
-
-```sh
-git clone https://github.com/solvespace/solvespace
-cd solvespace
-git submodule update --init extlib/libdxfrw extlib/mimalloc extlib/eigen
-```
 
 After that, build SolveSpace as following:
 
@@ -146,13 +148,7 @@ Debian derivative (e.g. Ubuntu) these can be installed with:
 apt-get install git build-essential cmake mingw-w64
 ```
 
-Before building, check out the project and the necessary submodules:
+Before building, [check out the project and the necessary submodules](#via-source-code).
-
-```sh
-git clone https://github.com/solvespace/solvespace
-cd solvespace
-git submodule update --init
-```
 
 Build 64-bit SolveSpace with the following:
 
@@ -169,6 +165,45 @@ command-line interface is built as `build/bin/solvespace-cli.exe`.
 
 Space Navigator support will not be available.
 
+### Building for web (very experimental)
+
+**Please note that this port contains many critical bugs and unimplemented core functions.**
+
+You will need the usual build tools, cmake and [Emscripten][]. On a Debian derivative (e.g. Ubuntu) dependencies other than Emscripten can be installed with:
+
+```sh
+apt-get install git build-essential cmake
+```
+
+First, install and prepare `emsdk`:
+
+```sh
+git clone https://github.com/emscripten-core/emsdk
+cd emsdk
+./emsdk install latest
+./emsdk activate latest
+source ./emsdk_env.sh
+cd ..
+```
+
+Before building, [check out the project and the necessary submodules](#via-source-code).
+
+After that, build SolveSpace as following:
+
+```sh
+mkdir build
+cd build
+emcmake cmake .. -DCMAKE_BUILD_TYPE=Release -DENABLE_LTO="ON" -DENABLE_TESTS="OFF" -DENABLE_CLI="OFF" -DENABLE_COVERAGE="OFF"
+make
+```
+
+The graphical interface is built as multiple files in the `build/bin` directory with names
+starting with `solvespace`. It can be run locally with `emrun build/bin/solvespace.html`.
+
+The command-line interface is not available.
+
+[emscripten]: https://emscripten.org/
+
 ## Building on macOS
 
 You will need git, XCode tools, CMake and libomp. Git, CMake and libomp can be installed
@@ -181,13 +216,7 @@ brew install git cmake libomp
 XCode has to be installed via AppStore or [the Apple website][appledeveloper];
 it requires a free Apple ID.
 
-Before building, check out the project and the necessary submodules:
+Before building, [check out the project and the necessary submodules](#via-source-code).
-
-```sh
-git clone https://github.com/solvespace/solvespace
-cd solvespace
-git submodule update --init
-```
 
 After that, build SolveSpace as following:
 
@@ -225,13 +254,7 @@ These can be installed from the ports tree:
 pkg_add -U git cmake libexecinfo png json-c gtk3mm pangomm
 ```
 
-Before building, check out the project and the necessary submodules:
+Before building, [check out the project and the necessary submodules](#via-source-code).
-
-```sh
-git clone https://github.com/solvespace/solvespace
-cd solvespace
-git submodule update --init extlib/libdxfrw extlib/mimalloc extlib/eigen
-```
 
 After that, build SolveSpace as following:
 
@@ -254,10 +277,14 @@ by passing the `-DENABLE_GUI=OFF` flag to the cmake invocation.
 You will need [git][gitwin], [cmake][cmakewin] and a C++ compiler
 (either Visual C++ or MinGW). If using Visual C++, Visual Studio 2015
 or later is required.
+If gawk is in your path be sure it is a proper Windows port that can handle CL LF line endings.
+If not CMake may fail in libpng due to some awk scripts - issue #1228.
+
+Before building, [check out the project and the necessary submodules](#via-source-code).
 
 ### Building with Visual Studio IDE
 
-Check out the git submodules. Create a directory `build` in
+Create a directory `build` in
 the source tree and point cmake-gui to the source tree and that directory.
 Press "Configure" and "Generate", then open `build\solvespace.sln` with
 Visual C++ and build it.
@@ -269,9 +296,6 @@ First, ensure that `git` and `cl` (the Visual C++ compiler driver) are in your
 Visual Studio install. Then, run the following in cmd or PowerShell:
 
 ```bat
-git clone https://github.com/solvespace/solvespace
-cd solvespace
-git submodule update --init
 mkdir build
 cd build
 cmake .. -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Release
@@ -287,9 +311,6 @@ First, ensure that git and gcc are in your `$PATH`. Then, run the following
 in bash:
 
 ```sh
-git clone https://github.com/solvespace/solvespace
-cd solvespace
-git submodule update --init
 mkdir build
 cd build
 cmake .. -DCMAKE_BUILD_TYPE=Release

cmake/DisableWarnings.cmake

@@ -4,12 +4,12 @@ function(disable_warnings)
     if(CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w" PARENT_SCOPE)
     elseif(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W0" PARENT_SCOPE)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W0 /MP" PARENT_SCOPE)
     endif()
 
     if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -w" PARENT_SCOPE)
     elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W0" PARENT_SCOPE)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W0 /MP" PARENT_SCOPE)
     endif()
 endfunction()

cmake/FindCairo.cmake

@@ -0,0 +1,75 @@
+# - Try to find Cairo
+# Once done, this will define
+#
+#  CAIRO_FOUND - system has Cairo
+#  CAIRO_INCLUDE_DIRS - the Cairo include directories
+#  CAIRO_LIBRARIES - link these to use Cairo
+#
+# Copyright (C) 2012 Raphael Kubo da Costa <rakuco@webkit.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1.  Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+# 2.  Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
+# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+find_package(PkgConfig)
+pkg_check_modules(PC_CAIRO QUIET cairo)
+
+find_path(CAIRO_INCLUDE_DIRS
+    NAMES cairo.h
+    HINTS ${PC_CAIRO_INCLUDEDIR}
+          ${PC_CAIRO_INCLUDE_DIRS}
+    PATH_SUFFIXES cairo
+)
+
+find_library(CAIRO_LIBRARIES
+    NAMES cairo
+    HINTS ${PC_CAIRO_LIBDIR}
+          ${PC_CAIRO_LIBRARY_DIRS}
+)
+
+if (CAIRO_INCLUDE_DIRS)
+    if (EXISTS "${CAIRO_INCLUDE_DIRS}/cairo-version.h")
+        file(READ "${CAIRO_INCLUDE_DIRS}/cairo-version.h" CAIRO_VERSION_CONTENT)
+
+        string(REGEX MATCH "#define +CAIRO_VERSION_MAJOR +([0-9]+)" _dummy "${CAIRO_VERSION_CONTENT}")
+        set(CAIRO_VERSION_MAJOR "${CMAKE_MATCH_1}")
+
+        string(REGEX MATCH "#define +CAIRO_VERSION_MINOR +([0-9]+)" _dummy "${CAIRO_VERSION_CONTENT}")
+        set(CAIRO_VERSION_MINOR "${CMAKE_MATCH_1}")
+
+        string(REGEX MATCH "#define +CAIRO_VERSION_MICRO +([0-9]+)" _dummy "${CAIRO_VERSION_CONTENT}")
+        set(CAIRO_VERSION_MICRO "${CMAKE_MATCH_1}")
+
+        set(CAIRO_VERSION "${CAIRO_VERSION_MAJOR}.${CAIRO_VERSION_MINOR}.${CAIRO_VERSION_MICRO}")
+    endif ()
+endif ()
+
+if ("${Cairo_FIND_VERSION}" VERSION_GREATER "${CAIRO_VERSION}")
+    message(FATAL_ERROR "Required version (" ${Cairo_FIND_VERSION} ") is higher than found version (" ${CAIRO_VERSION} ")")
+endif ()
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Cairo REQUIRED_VARS CAIRO_INCLUDE_DIRS CAIRO_LIBRARIES
+                                        VERSION_VAR CAIRO_VERSION)
+
+mark_as_advanced(
+    CAIRO_INCLUDE_DIRS
+    CAIRO_LIBRARIES
+)

cmake/Platform/Emscripten.cmake

@@ -0,0 +1,20 @@
+set(EMSCRIPTEN 1)
+
+set(CMAKE_C_OUTPUT_EXTENSION   ".o")
+set(CMAKE_CXX_OUTPUT_EXTENSION ".o")
+set(CMAKE_EXECUTABLE_SUFFIX    ".html")
+
+set(CMAKE_SIZEOF_VOID_P 4)
+
+set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
+
+# FIXME(emscripten): Suppress non-c-typedef-for-linkage warnings in solvespace.h
+add_compile_options(-Wno-non-c-typedef-for-linkage)
+
+
+# Enable optimization. Workaround for "too many locals" error when runs on browser.
+if(CMAKE_BUILD_TYPE STREQUAL Release)
+    add_compile_options(-O2)
+else()
+    add_compile_options(-O1)
+endif()

cmake/Toolchain-emscripten.cmake

@@ -0,0 +1,8 @@
+set(CMAKE_SYSTEM_NAME Emscripten)
+
+set(TRIPLE asmjs-unknown-emscripten)
+
+set(CMAKE_C_COMPILER emcc)
+set(CMAKE_CXX_COMPILER em++)
+
+set(M_LIBRARY m)

cmake/c_flag_overrides.cmake

@@ -4,3 +4,7 @@ if(MSVC)
     set(CMAKE_C_FLAGS_RELEASE_INIT        "/MT /O2 /Ob2 /D NDEBUG")
     set(CMAKE_C_FLAGS_RELWITHDEBINFO_INIT "/MT /Zi /O2 /Ob1 /D NDEBUG")
 endif()
+
+if(EMSCRIPTEN)
+    set(CMAKE_C_FLAGS_DEBUG_INIT "-g4")
+endif()

cmake/cxx_flag_overrides.cmake

@@ -4,3 +4,7 @@ if(MSVC)
     set(CMAKE_CXX_FLAGS_RELEASE_INIT        "/MT /O2 /Ob2 /D NDEBUG")
     set(CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "/MT /Zi /O2 /Ob1 /D NDEBUG")
 endif()
+
+if(EMSCRIPTEN)
+    set(CMAKE_CXX_FLAGS_DEBUG_INIT "-g4")
+endif()

exposed/CMakeLists.txt

@@ -6,3 +6,8 @@ add_executable(CDemo
 
 target_link_libraries(CDemo
     slvs)
+
+if(EMSCRIPTEN)
+    set_target_properties(CDemo PROPERTIES
+        LINK_FLAGS "-s TOTAL_MEMORY=134217728")
+endif()

extlib/mimalloc

@@ -1 +1 @@
-Subproject commit 4e643b6d3178e0ea2a093b7e14fe621631a91e4b
+Subproject commit f819dbb4e4813fab464aee16770f39f11476bfea

pkg/flatpak/com.solvespace.SolveSpace.json

@@ -1,69 +1,97 @@
 {
+    "$schema": "https://raw.githubusercontent.com/TingPing/flatpak-manifest-schema/master/flatpak-manifest.schema",
     "app-id": "com.solvespace.SolveSpace",
     "runtime": "org.freedesktop.Platform",
-    "runtime-version": "20.08",
+    "runtime-version": "21.08",
     "sdk": "org.freedesktop.Sdk",
     "finish-args": [
-        /* Access to display server and OpenGL */
+        "--device=dri",
         "--share=ipc",
         "--socket=fallback-x11",
-        "--socket=wayland",
+        "--socket=wayland"
-        "--device=dri",
-        /* Access to save files */
-        "--filesystem=home"
     ],
     "cleanup": [
         "/include",
-        "/lib/*/include",
+        "/lib/cmake",
-        "*.a",
+        "/lib/pkgconfig",
-        "*.la",
-        "*.m4",
-        "/lib/libslvs*.so*",
-        "/lib/libglibmm_generate_extra_defs*.so*",
-        "/share/pkgconfig",
-        "*.pc",
-        "/share/man",
-        "/share/doc",
         "/share/aclocal",
-        /* mm-common junk */
+        "/share/pkgconfig",
-        "/bin/mm-common-prepare",
+        "*.la"
-        "/share/mm-common"
     ],
     "command": "solvespace",
     "modules": [
         {
             "name": "mm-common",
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "https://download.gnome.org/sources/mm-common/1.0/mm-common-1.0.2.tar.xz",
-                    "sha256": "a2a99f3fa943cf662f189163ed39a2cfc19a428d906dd4f92b387d3659d1641d"
-                }
-            ]
-        },
-        {
-            "name": "sigc++",
-            "config-opts": [
-                "--disable-documentation"
-            ],
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "https://download.gnome.org/sources/libsigc++/2.10/libsigc%2B%2B-2.10.6.tar.xz",
-                    "sha256": "dda176dc4681bda9d5a2ac1bc55273bdd381662b7a6d49e918267d13e8774e1b"
-                }
-            ]
-        },
-        {
-            "name": "glibmm",
-            "config-opts": [],
             "buildsystem": "meson",
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://download.gnome.org/sources/glibmm/2.64/glibmm-2.64.5.tar.xz",
+                    "url": "https://download.gnome.org/sources/mm-common/1.0/mm-common-1.0.4.tar.xz",
-                    "sha256": "508fc86e2c9141198aa16c225b16fd6b911917c0d3817602652844d0973ea386"
+                    "sha256": "e954c09b4309a7ef93e13b69260acdc5738c907477eb381b78bb1e414ee6dbd8",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "mm-common",
+                        "stable-only": true
                     }
+                }
+            ],
+            "cleanup": [
+                "/bin",
+                "/share/doc",
+                "/share/man",
+                "/share/mm-common"
+            ]
+        },
+        {
+            "name": "sigc++",
+            "buildsystem": "meson",
+            "config-opts": [
+                "-Dbuild-examples=false"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://download.gnome.org/sources/libsigc++/2.10/libsigc++-2.10.8.tar.xz",
+                    "sha256": "235a40bec7346c7b82b6a8caae0456353dc06e71f14bc414bcc858af1838719a",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "libsigc++",
+                        "stable-only": true,
+                        "versions": {
+                            "<": "3.0.0"
+                        }
+                    }
+                }
+            ],
+            "cleanup": [
+                "/lib/sigc++-*"
+            ]
+        },
+        {
+            "name": "glibmm",
+            "buildsystem": "meson",
+            "config-opts": [
+                "-Dbuild-examples=false"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://download.gnome.org/sources/glibmm/2.66/glibmm-2.66.4.tar.xz",
+                    "sha256": "199ace5682d81b15a1d565480b4a950682f2db6402c8aa5dd7217d71edff81d5",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "glibmm",
+                        "stable-only": true,
+                        "versions": {
+                            "<": "2.68.0"
+                        }
+                    }
+                }
+            ],
+            "cleanup": [
+                "/lib/giomm-*",
+                "/lib/glibmm-*",
+                "/lib/libglibmm_generate_extra_defs-*.so*"
             ]
         },
         {
@@ -74,76 +102,152 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "http://ftp.gnome.org/pub/GNOME/sources/cairomm/1.12/cairomm-1.12.0.tar.xz",
+                    "url": "https://download.gnome.org/sources/cairomm/1.12/cairomm-1.12.0.tar.xz",
-                    "sha256": "a54ada8394a86182525c0762e6f50db6b9212a2109280d13ec6a0b29bfd1afe6"
+                    "sha256": "a54ada8394a86182525c0762e6f50db6b9212a2109280d13ec6a0b29bfd1afe6",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "cairomm",
+                        "stable-only": true,
+                        "versions": {
+                            "<": "1.16.0"
                         }
+                    }
+                }
+            ],
+            "cleanup": [
+                "/lib/cairomm-*"
             ]
         },
         {
             "name": "pangomm",
-            "config-opts": [
-                "--disable-documentation"
-            ],
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "http://ftp.gnome.org/pub/GNOME/sources/pangomm/2.40/pangomm-2.40.2.tar.xz",
-                    "sha256": "0a97aa72513db9088ca3034af923484108746dba146e98ed76842cf858322d05"
-                }
-            ]
-        },
-        {
-            "name": "atkmm",
-            "config-opts": [
-                "--disable-documentation"
-            ],
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "http://ftp.gnome.org/pub/GNOME/sources/atkmm/2.28/atkmm-2.28.0.tar.xz",
-                    "sha256": "4c4cfc917fd42d3879ce997b463428d6982affa0fb660cafcc0bc2d9afcedd3a"
-                }
-            ]
-        },
-        {
-            "name": "gtkmm",
-            "config-opts": [],
             "buildsystem": "meson",
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://download.gnome.org/sources/gtkmm/3.24/gtkmm-3.24.4.tar.xz",
+                    "url": "https://download.gnome.org/sources/pangomm/2.46/pangomm-2.46.2.tar.xz",
-                    "sha256": "9beb71c3e90cfcfb790396b51e3f5e7169966751efd4f3ef9697114be3be6743"
+                    "sha256": "57442ab4dc043877bfe3839915731ab2d693fc6634a71614422fb530c9eaa6f4",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "pangomm",
+                        "stable-only": true,
+                        "versions": {
+                            "<": "2.48.0"
                         }
+                    }
+                }
+            ],
+            "cleanup": [
+                "/lib/pangomm-*"
+            ]
+        },
+        {
+            "name": "atkmm",
+            "buildsystem": "meson",
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://download.gnome.org/sources/atkmm/2.28/atkmm-2.28.2.tar.xz",
+                    "sha256": "a0bb49765ceccc293ab2c6735ba100431807d384ffa14c2ebd30e07993fd2fa4",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "atkmm",
+                        "stable-only": true,
+                        "versions": {
+                            "<": "2.30.0"
+                        }
+                    }
+                }
+            ],
+            "cleanup": [
+                "/lib/atkmm-*"
+            ]
+        },
+        {
+            "name": "gtkmm",
+            "buildsystem": "meson",
+            "config-opts": [
+                "-Dbuild-demos=false",
+                "-Dbuild-tests=false"
+            ],
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://download.gnome.org/sources/gtkmm/3.24/gtkmm-3.24.6.tar.xz",
+                    "sha256": "4b3e142e944e1633bba008900605c341a93cfd755a7fa2a00b05d041341f11d6",
+                    "x-checker-data": {
+                        "type": "gnome",
+                        "name": "gtkmm",
+                        "stable-only": true,
+                        "versions": {
+                            "<": "4.0.0"
+                        }
+                    }
+                }
+            ],
+            "cleanup": [
+                "/lib/gdkmm-*",
+                "/lib/gtkmm-*"
+            ]
+        },
+        {
+            "name": "eigen",
+            "buildsystem": "cmake-ninja",
+            "builddir": true,
+            "sources": [
+                {
+                    "type": "archive",
+                    "url": "https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz",
+                    "sha256": "8586084f71f9bde545ee7fa6d00288b264a2b7ac3607b974e54d13e7162c1c72",
+                    "x-checker-data": {
+                        "type": "anitya",
+                        "project-id": 13751,
+                        "stable-only": true,
+                        "url-template": "https://gitlab.com/libeigen/eigen/-/archive/$version/eigen-$version.tar.gz"
+                    }
+                }
+            ],
+            "cleanup": [
+                "*"
             ]
         },
         {
             "name": "libjson-c",
+            "buildsystem": "cmake-ninja",
+            "builddir": true,
+            "config-opts": [
+                "-DBUILD_STATIC_LIBS=OFF",
+                "-DENABLE_THREADING=ON"
+            ],
             "sources": [
                 {
-                    /* 0.15-nodoc doesn't build */
                     "type": "archive",
-                    "url": "https://s3.amazonaws.com/json-c_releases/releases/json-c-0.13.1-nodoc.tar.gz",
+                    "url": "https://s3.amazonaws.com/json-c_releases/releases/json-c-0.16.tar.gz",
-                    "sha256": "94a26340c0785fcff4f46ff38609cf84ebcd670df0c8efd75d039cc951d80132"
+                    "sha256": "8e45ac8f96ec7791eaf3bb7ee50e9c2100bbbc87b8d0f1d030c5ba8a0288d96b",
+                    "x-checker-data": {
+                        "type": "anitya",
+                        "project-id": 1477,
+                        "stable-only": true,
+                        "url-template": "https://s3.amazonaws.com/json-c_releases/releases/json-c-$version.tar.gz"
                     }
-            ],
+                }
-            "buildsystem": "cmake",
+            ]
-            "builddir": true
         },
         {
-            "name": "SolveSpace",
+            "name": "solvespace",
+            "buildsystem": "cmake-ninja",
+            "builddir": true,
+            "config-opts": [
+                "-DFLATPAK=ON",
+                "-DENABLE_TESTS=OFF"
+            ],
             "sources": [
                 {
                     "type": "dir",
                     "path": "../.."
                 }
             ],
-            "buildsystem": "cmake",
+            "cleanup": [
-            "builddir": true,
+                "/lib/libslvs*.so*"
-            "config-opts": [
-                "-DFLATPAK=ON",
-                "-DENABLE_CLI=OFF",
-                "-DENABLE_TESTS=OFF"
             ]
         }
     ]

pkg/snap/snap/snapcraft.yaml

@@ -1,5 +1,5 @@
 name: solvespace
-base: core20
+base: core22
 summary: Parametric 2d/3d CAD
 adopt-info: solvespace
 description: |
@@ -15,6 +15,7 @@ description: |
 confinement: strict
 license: GPL-3.0
 compression: lzo
+grade: stable
 
 layout:
   /usr/share/solvespace:
@@ -24,11 +25,11 @@ apps:
   solvespace:
     command: usr/bin/solvespace
     desktop: solvespace.desktop
-    extensions: [gnome-3-38]
+    extensions: [gnome]
     plugs: [opengl, unity7, home, removable-media, gsettings, network]
   cli:
     command: usr/bin/solvespace-cli
-    extensions: [gnome-3-38]
+    extensions: [gnome]
     plugs: [home, removable-media, network]
 
 parts:
@@ -37,16 +38,14 @@ parts:
     source: ./solvespace-snap-src
     source-type: local
     override-pull: |
-      snapcraftctl pull
+      craftctl default
       git submodule update --init extlib/libdxfrw extlib/mimalloc extlib/eigen
     override-build: |
-      snapcraftctl build
+      craftctl default
       project_version=$(grep CMAKE_PROJECT_VERSION:STATIC CMakeCache.txt | cut -d "=" -f2)
-      cd $SNAPCRAFT_PART_SRC
+      cd $CRAFT_PART_SRC
       version="$project_version~$(git rev-parse --short=8 HEAD)"
-      snapcraftctl set-version "$version"
+      craftctl set version="$version"
-      git describe --exact-match HEAD && grade="stable" || grade="devel"
-      snapcraftctl set-grade "$grade"
     cmake-parameters:
       - -DCMAKE_INSTALL_PREFIX=/usr
       - -DCMAKE_BUILD_TYPE=Release
@@ -54,8 +53,6 @@ parts:
       - -DSNAP=ON
       - -DENABLE_OPENMP=ON
       - -DENABLE_LTO=ON
-    build-snaps:
-      - gnome-3-38-2004-sdk
     build-packages:
       - zlib1g-dev
       - libpng-dev
@@ -67,6 +64,7 @@ parts:
       - libspnav-dev
       - git
       - g++
+      - libc6-dev
     stage-packages:
       - libspnav0
       - libsigc++-2.0-0v5
@@ -74,14 +72,14 @@ parts:
   cleanup:
     after: [solvespace]
     plugin: nil
-    build-snaps: [gnome-3-38-2004]
+    build-snaps: [gnome-42-2204]
     override-prime: |
       set -eux
-      for snap in "gnome-3-38-2004"; do  # List all content-snaps you're using here
+      for snap in "gnome-42-2204"; do  # List all content-snaps you're using here
-        cd "/snap/$snap/current" && find . -type f,l -exec rm -f "$SNAPCRAFT_PRIME/{}" "$SNAPCRAFT_PRIME/usr/{}" \;
+        cd "/snap/$snap/current" && find . -type f,l -exec rm -f "$CRAFT_PRIME/{}" "$CRAFT_PRIME/usr/{}" \;
       done
       for cruft in bug lintian man; do
-        rm -rf $SNAPCRAFT_PRIME/usr/share/$cruft
+        rm -rf $CRAFT_PRIME/usr/share/$cruft
       done
-      find $SNAPCRAFT_PRIME/usr/share/doc/ -type f -not -name 'copyright' -delete
+      find $CRAFT_PRIME/usr/share/doc/ -type f -not -name 'copyright' -delete
-      find $SNAPCRAFT_PRIME/usr/share -type d -empty -delete
+      find $CRAFT_PRIME/usr/share -type d -empty -delete

res/CMakeLists.txt

@@ -1,6 +1,7 @@
 # First, set up registration functions for the kinds of resources we handle.
 set(resource_root ${CMAKE_CURRENT_SOURCE_DIR}/)
 set(resource_list)
+set(resource_names)
 if(WIN32)
     configure_file(${CMAKE_CURRENT_SOURCE_DIR}/win32/versioninfo.rc.in
                    ${CMAKE_CURRENT_BINARY_DIR}/win32/versioninfo.rc)
@@ -83,6 +84,23 @@ elseif(APPLE)
             DEPENDS ${source}
             VERBATIM)
     endfunction()
+elseif(EMSCRIPTEN)
+    set(resource_dir ${CMAKE_BINARY_DIR}/src/res)
+
+    function(add_resource name)
+        set(source ${CMAKE_CURRENT_SOURCE_DIR}/${name})
+        set(target ${resource_dir}/${name})
+        set(resource_list  "${resource_list};${target}" PARENT_SCOPE)
+        set(resource_names "${resource_names};res/${name}" PARENT_SCOPE)
+
+        add_custom_command(
+            OUTPUT ${target}
+            COMMAND ${CMAKE_COMMAND} -E make_directory ${resource_dir}
+            COMMAND ${CMAKE_COMMAND} -E copy ${source} ${target}
+            COMMENT "Copying resource ${name}"
+            DEPENDS ${source}
+            VERBATIM)
+    endfunction()
 else() # Unix
     include(GNUInstallDirs)
 
@@ -112,6 +130,7 @@ function(add_resources)
     foreach(name ${ARGN})
         add_resource(${name})
         set(resource_list  "${resource_list}" PARENT_SCOPE)
+        set(resource_names "${resource_names}" PARENT_SCOPE)
     endforeach()
 endfunction()
 
@@ -262,6 +281,7 @@ add_resources(
     icons/text-window/shaded.png
     icons/text-window/workplane.png
     locales.txt
+    locales/cs_CZ.po
     locales/de_DE.po
     locales/en_US.po
     locales/fr_FR.po
@@ -270,6 +290,7 @@ add_resources(
     locales/tr_TR.po
     locales/ru_RU.po
     locales/zh_CN.po
+    locales/ja_JP.po
     fonts/unifont.hex.gz
     fonts/private/0-check-false.png
     fonts/private/1-check-true.png
@@ -304,4 +325,6 @@ add_custom_target(resources
     DEPENDS ${resource_list})
 if(WIN32)
     set_property(TARGET resources PROPERTY EXTRA_SOURCES ${rc_file})
+elseif(EMSCRIPTEN)
+    set_property(TARGET resources PROPERTY NAMES ${resource_names})
 endif()

res/freedesktop/com.solvespace.SolveSpace.metainfo.xml.in

@@ -19,7 +19,7 @@
       SolveSpace is a free (GPLv3) parametric 3d CAD tool. Applications include:
     </p>
     <ul>
-      <li>Modeling 3d parts — draw with extrudes, revolves, and Boolean operations</li>
+      <li>Modeling 3d parts — draw with extrudes, revolves/helix, and Boolean operations</li>
       <li>Modeling 2d parts — draw the part as a single section, and export; use 3d assembly to verify fit</li>
       <li>Modeling 3d-printed parts — export the STL or other triangle mesh expected by most slicers</li>
       <li>Preparing 2D CAM data — export 2d vector art for a waterjet machine or laser cutter</li>
@@ -31,6 +31,34 @@
   <url type="bugtracker">https://github.com/solvespace/solvespace/issues</url>
 
   <launchable type="desktop-id">@DESKTOP_FILE_NAME@</launchable>
+
+  <screenshots>
+    <screenshot type="default">
+      <caption>Main window with an empty document</caption>
+      <image>https://solvespace.com/pics/window-linux-main.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Property Browser with an empty document</caption>
+      <image>https://solvespace.com/pics/window-linux-property-browser.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Viewing and editing constraints on a model</caption>
+      <image>https://solvespace.com/pics/front-page-pic.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>3D view of a stand made from notched angle iron, from the "ex-stand" project</caption>
+      <image>https://solvespace.com/pics/ex-stand-detail.jpg</image>
+    </screenshot>
+    <screenshot>
+      <caption>Dimensioning a 2D sketch for a case for a printed circuit board, from the "ex-case" project</caption>
+      <image>https://solvespace.com/pics/ex-case-outline.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Showing tracing of Chebyshev's linkage, from the "ex-chebyshev" project</caption>
+      <image>https://solvespace.com/pics/ex-chebyshev.png</image>
+    </screenshot>
+  </screenshots>
+
   <provides>
     <mediatype>application/x-solvespace</mediatype>
   </provides>
@@ -38,6 +66,19 @@
   <content_rating type="oars-1.0" />
 
   <releases>
+    <release version="3.1" date="2022-06-01" type="stable">
+      <description>
+        <p>Major new stable release. Includes new arc and line length ratio and difference
+        constraints, comments associated with point entities. Adds "exploded view" to sketches,
+        and support for displaying measurements in "feet-inches". Adds a pitch parameter to
+        helix extrusions. Allows use of Point and Normal to define a new workplane to sketch in.
+        Adds live updating of Property Browser while dragging the sketch, and active links for
+        all points, normals, and vectors in the Property Browser. Adds the ability to link STL
+        files into a model. Includes a variety of UI improvements. Speeds up complex sketches
+        by up to 8x and doubles the maximum unknowns.</p>
+      </description>
+      <url>https://github.com/solvespace/solvespace/releases/tag/v3.0</url>
+    </release>
     <release version="3.0" date="2021-04-18" type="stable">
       <description>
         <p>Major new stable release. Includes new intersection boolean operation,

res/freedesktop/solvespace-flatpak.desktop.in

@@ -2,7 +2,7 @@
 Version=1.0
 Name=SolveSpace
 Comment=A parametric 2d/3d CAD
-Exec=${CMAKE_INSTALL_FULL_BINDIR}/solvespace
+Exec=${CMAKE_INSTALL_FULL_BINDIR}/solvespace %f
 MimeType=application/x-solvespace
 Icon=com.solvespace.SolveSpace
 Type=Application

res/freedesktop/solvespace-snap.desktop

@@ -2,7 +2,7 @@
 Version=1.0
 Name=SolveSpace
 Comment=A parametric 2d/3d CAD
-Exec=solvespace
+Exec=solvespace %f
 MimeType=application/x-solvespace
 Icon=${SNAP}/meta/icons/hicolor/scalable/apps/snap.solvespace.svg
 Type=Application

res/freedesktop/solvespace.desktop.in

@@ -2,7 +2,7 @@
 Version=1.0
 Name=SolveSpace
 Comment=A parametric 2d/3d CAD
-Exec=${CMAKE_INSTALL_FULL_BINDIR}/solvespace
+Exec=${CMAKE_INSTALL_FULL_BINDIR}/solvespace %f
 MimeType=application/x-solvespace
 Icon=solvespace
 Type=Application

res/locales.txt

@@ -1,5 +1,6 @@
 # This file lists the ISO locale codes (ISO 639-1/ISO 3166-1), Windows LCIDs,
 # and human-readable names for every culture supported by SolveSpace.
+cs-CZ,1029,Česky
 de-DE,0407,Deutsch
 en-US,0409,English (US)
 fr-FR,040C,Français
@@ -8,3 +9,4 @@ ru-RU,0419,Русский
 tr-TR,041F,Türkçe
 uk-UA,0422,Українська
 zh-CN,0804,简体中文
+ja-JP,0411,日本語

res/locales/de_DE.po

@@ -7,15 +7,15 @@ msgstr ""
 "Project-Id-Version: SolveSpace 3.0\n"
 "Report-Msgid-Bugs-To: whitequark@whitequark.org\n"
 "POT-Creation-Date: 2022-02-01 16:24+0200\n"
-"PO-Revision-Date: 2018-07-19 06:55+0000\n"
+"PO-Revision-Date: 2022-04-30 16:44+0200\n"
 "Last-Translator: Reini Urban <rurban@cpan.org>\n"
 "Language-Team: none\n"
 "Language: de\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"X-Generator: Zanata 4.5.0\n"
+"X-Generator: Poedit 2.4.2\n"
-"Plural-Forms: nplurals=2; plural=(n != 1)\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: clipboard.cpp:309
 msgid ""
@@ -26,7 +26,7 @@ msgstr ""
 "Ausschneiden, Einfügen und Kopieren sind nur in einer Arbeitsebene "
 "zulässig.\n"
 "\n"
-"Aktivieren Sie eine mit Skizze -> In Arbeitsebene"
+"Aktivieren Sie eine mit \"Skizze -> In Arbeitsebene\"."
 
 #: clipboard.cpp:326
 msgid "Clipboard is empty; nothing to paste."
@@ -172,12 +172,12 @@ msgstr "Längenverhältnis"
 #: constraint.cpp:25
 msgctxt "constr-name"
 msgid "arc-arc-length-ratio"
-msgstr ""
+msgstr "Bogen-Bogen-Längenverhältnis"
 
 #: constraint.cpp:26
 msgctxt "constr-name"
 msgid "arc-line-length-ratio"
-msgstr ""
+msgstr "Bogen-Linien-Längenverhältnis"
 
 #: constraint.cpp:27
 msgctxt "constr-name"
@@ -187,12 +187,12 @@ msgstr "Längendifferenz"
 #: constraint.cpp:28
 msgctxt "constr-name"
 msgid "arc-arc-len-difference"
-msgstr ""
+msgstr "Bogen-Bogen-Längendifferenz"
 
 #: constraint.cpp:29
 msgctxt "constr-name"
 msgid "arc-line-len-difference"
-msgstr ""
+msgstr "Bogen-Linien-Längendifferenz"
 
 #: constraint.cpp:30
 msgctxt "constr-name"
@@ -306,7 +306,7 @@ msgid ""
 msgstr ""
 "Die Bogentangente und das Liniensegment müssen einen gemeinsamen Endpunkt "
 "haben. Schränken Sie mit \"Einschränkung / Auf Punkt\" ein, bevor Sie die "
-"Tangente einschränken. -> Sc"
+"Tangente einschränken."
 
 #: constraint.cpp:163
 msgid ""
@@ -315,7 +315,7 @@ msgid ""
 msgstr ""
 "Die Kurventangente und das Liniensegment müssen einen gemeinsamen Endpunkt "
 "haben. Schränken Sie mit \"Einschränkung / Auf Punkt\" ein, bevor Sie die "
-"Tangente einschränken. -> Sc"
+"Tangente einschränken."
 
 #: constraint.cpp:189
 msgid ""
@@ -323,7 +323,7 @@ msgid ""
 "before constraining tangent."
 msgstr ""
 "Die Kurven müssen einen gemeinsamen Endpunkt haben. Schränken Sie mit "
-"\"Einschränkung / Auf Punkt\" ein, bevor Sie die Tangente einschränken. -> Sc"
+"\"Einschränkung / Auf Punkt\" ein, bevor Sie die Tangente einschränken."
 
 #: constraint.cpp:238
 msgid ""
@@ -408,6 +408,12 @@ msgid ""
 "    * two arcs\n"
 "    * one arc and one line segment\n"
 msgstr ""
+"Ungültige Auswahl für Einschränkung \"Längenverhältnis\". Diese "
+"Einschränkung ist anwendbar auf:\n"
+"\n"
+"    * zwei Liniensegmente\n"
+"    * zwei Bögen\n"
+"    * einen Bogen und ein Liniensegment\n"
 
 #: constraint.cpp:441
 msgid ""
@@ -418,6 +424,12 @@ msgid ""
 "    * two arcs\n"
 "    * one arc and one line segment\n"
 msgstr ""
+"Ungültige Auswahl für Einschränkung \"Längendifferenz\". Diese Einschränkung "
+"ist anwendbar auf:\n"
+"\n"
+"    * zwei Liniensegmente\n"
+"    * zwei Bögen\n"
+"    * einen Bogen und ein Liniensegment\n"
 
 #: constraint.cpp:472
 msgid ""
@@ -584,7 +596,7 @@ msgid ""
 "2d View to export bare lines and curves."
 msgstr ""
 "Kein Festkörper vorhanden; zeichnen Sie eines mit Extrusionen und Drehungen, "
-"oder exportieren Sie bloße Linien und Kurven mit \"2D-Ansicht exportieren\""
+"oder exportieren Sie bloße Linien und Kurven mit \"2D-Ansicht exportieren\"."
 
 #: export.cpp:61
 msgid ""
@@ -699,7 +711,7 @@ msgstr "&Neu"
 
 #: graphicswin.cpp:43
 msgid "&Open..."
-msgstr "&Öffnen"
+msgstr "&Öffnen..."
 
 #: graphicswin.cpp:44
 msgid "Open &Recent"
@@ -727,7 +739,7 @@ msgstr "Exportiere 2D-Auswahl…"
 
 #: graphicswin.cpp:51
 msgid "Export 3d &Wireframe..."
-msgstr "Exportiere 3D-Drahtgittermodell"
+msgstr "Exportiere 3D-Drahtgittermodell..."
 
 #: graphicswin.cpp:52
 msgid "Export Triangle &Mesh..."
@@ -859,7 +871,7 @@ msgstr "Perspektivische Projektion"
 
 #: graphicswin.cpp:97
 msgid "Show E&xploded View"
-msgstr ""
+msgstr "Zeige e&xplodierte Ansicht"
 
 #: graphicswin.cpp:98
 msgid "Dimension &Units"
@@ -879,7 +891,7 @@ msgstr "Maße in Zoll"
 
 #: graphicswin.cpp:102
 msgid "Dimensions in &Feet and Inches"
-msgstr ""
+msgstr "Maße in &Fuß und Inch"
 
 #: graphicswin.cpp:104
 msgid "Show &Toolbar"
@@ -931,7 +943,7 @@ msgstr "D&rehen"
 
 #: graphicswin.cpp:121
 msgid "Link / Assemble..."
-msgstr "Verknüpfen / Zusammensetzen"
+msgstr "Verknüpfen / Zusammensetzen..."
 
 #: graphicswin.cpp:122
 msgid "Link Recent"
@@ -1047,11 +1059,11 @@ msgstr "Gleicher Abstand / Radius / Winkel"
 
 #: graphicswin.cpp:158
 msgid "Length / Arc Ra&tio"
-msgstr ""
+msgstr "Länge / Bogen Verhäl&tnis"
 
 #: graphicswin.cpp:159
 msgid "Length / Arc Diff&erence"
-msgstr ""
+msgstr "Länge / Bogen Diff&erenz"
 
 #: graphicswin.cpp:160
 msgid "At &Midpoint"
@@ -1119,7 +1131,7 @@ msgstr "Punkt nachzeichnen"
 
 #: graphicswin.cpp:180
 msgid "&Stop Tracing..."
-msgstr "Nachzeichnen beenden"
+msgstr "Nachzeichnen beenden..."
 
 #: graphicswin.cpp:181
 msgid "Step &Dimension..."
@@ -1139,7 +1151,7 @@ msgstr "&Website / Anleitung"
 
 #: graphicswin.cpp:186
 msgid "&Go to GitHub commit"
-msgstr ""
+msgstr "&Gehe zu GitHub commit"
 
 #: graphicswin.cpp:188
 msgid "&About"
@@ -1300,6 +1312,12 @@ msgid ""
 "    * a point and a normal (through the point, orthogonal to the normal)\n"
 "    * a workplane (copy of the workplane)\n"
 msgstr ""
+"Ungültige Auswahl für neue Skizze in der Arbeitsebene. Diese Gruppe kann "
+"erstellt werden mit:\n"
+"\n"
+"    * einem Punkt (durch den Punkt, orthogonal zur Koordinatenachse)\n"
+"    * einem Punkt und zwei Linienabschnitten (durch den Punkt, parallel zu "
+"den Linien)\n"
 
 #: group.cpp:166
 msgid ""
@@ -1307,7 +1325,7 @@ msgid ""
 "will be extruded normal to the workplane."
 msgstr ""
 "Aktivieren Sie vor der Extrusion eine Arbeitsebene (mit Skizze -> In "
-"Arbeitsebene). Die Skizze wird senkrecht zur Arbeitsebene extrudiert"
+"Arbeitsebene). Die Skizze wird senkrecht zur Arbeitsebene extrudiert."
 
 #: group.cpp:175
 msgctxt "group-name"
@@ -1434,7 +1452,7 @@ msgstr "Kante mit Länge Null!"
 
 #: importmesh.cpp:136
 msgid "Text-formated STL files are not currently supported"
-msgstr ""
+msgstr "Text-formatierte STL Dateien werden aktuell nicht unterstützt"
 
 #: modify.cpp:252
 msgid "Must be sketching in workplane to create tangent arc."
@@ -1646,7 +1664,7 @@ msgstr "SolveSpace-Modelle"
 #: platform/gui.cpp:89
 msgctxt "file-type"
 msgid "ALL"
-msgstr ""
+msgstr "ALLE"
 
 #: platform/gui.cpp:91
 msgctxt "file-type"
@@ -1656,7 +1674,7 @@ msgstr "IDF Leiterplatte"
 #: platform/gui.cpp:92
 msgctxt "file-type"
 msgid "STL triangle mesh"
-msgstr ""
+msgstr "STL-Dreiecks-Netz"
 
 #: platform/gui.cpp:96
 msgctxt "file-type"
@@ -2072,7 +2090,7 @@ msgstr ""
 
 #: style.cpp:735
 msgid "Style name cannot be empty"
-msgstr "Name des Linientyps kann nicht leer sein."
+msgstr "Name des Linientyps kann nicht leer sein"
 
 #: textscreens.cpp:791
 msgid "Can't repeat fewer than 1 time."
@@ -2084,7 +2102,7 @@ msgstr "Nicht mehr als 999 Wiederholungen möglich."
 
 #: textscreens.cpp:820
 msgid "Group name cannot be empty"
-msgstr "Der Name der Gruppe darf nicht leer sein."
+msgstr "Der Name der Gruppe darf nicht leer sein"
 
 #: textscreens.cpp:872
 msgid "Opacity must be between zero and one."

res/locales/ru_RU.po

@@ -8,8 +8,8 @@ msgstr ""
 "Project-Id-Version: SolveSpace 3.0\n"
 "Report-Msgid-Bugs-To: whitequark@whitequark.org\n"
 "POT-Creation-Date: 2022-02-01 16:24+0200\n"
-"PO-Revision-Date: 2021-10-04 15:33+0300\n"
+"PO-Revision-Date: 2022-11-05 19:37+0200\n"
-"Last-Translator: Olesya Gerasimenko <translation-team@basealt.ru>\n"
+"Last-Translator: ruevs Olesya Gerasimenko <translation-team@basealt.ru>\n"
 "Language-Team: Basealt Translation Team\n"
 "Language: ru_RU\n"
 "MIME-Version: 1.0\n"
@@ -936,7 +936,7 @@ msgstr "Тело В&ращения"
 
 #: graphicswin.cpp:119
 msgid "Re&volve"
-msgstr "Тело В&ращения"
+msgstr "Тело В&ращения на угол"
 
 #: graphicswin.cpp:121
 msgid "Link / Assemble..."
@@ -1350,9 +1350,9 @@ msgstr ""
 "Группа может быть создана, используя в качестве выделения следующие "
 "примитивы:\n"
 "\n"
-"    * точку и отрезок / координатный базис (нормаль) (тело вращения вокруг "
+"    * точку и отрезок / координатный базис (нормаль) (вращение вокруг "
 "оси, проходящей через точку и параллельной отрезку / нормали)\n"
-"    * отрезок (тело вращения вокруг оси, проходящей через отрезок)\n"
+"    * отрезок (вращение вокруг оси, проходящей через отрезок)\n"
 "\n"
 
 #: group.cpp:201
@@ -1363,7 +1363,7 @@ msgstr "тело-вращения"
 #: group.cpp:206
 msgid "Revolve operation can only be applied to planar sketches."
 msgstr ""
-"Операция создания тела вращения может быть применена только к плоским "
+"Операция создания тела вращения на угол может быть применена только к плоским "
 "эскизам."
 
 #: group.cpp:217
@@ -1374,19 +1374,19 @@ msgid ""
 "to line / normal, through point)\n"
 "    * a line segment (revolved about line segment)\n"
 msgstr ""
-"Неправильное выделение для создания группы тела вращения. \n"
+"Неправильное выделение для создания группы тела вращения на угол. \n"
 "Группа может быть создана, используя в качестве выделения следующие "
 "примитивы:\n"
 "\n"
-"    * точку и отрезок / координатный базис (нормаль) (тело вращения вокруг "
+"    * точку и отрезок / координатный базис (нормаль) (вращение вокруг "
 "оси, проходящей через точку и параллельной отрезку / нормали)\n"
-"    * отрезок (тело вращения вокруг оси, проходящей через отрезок)\n"
+"    * отрезок (вращение вокруг оси, проходящей через отрезок)\n"
 "\n"
 
 #: group.cpp:229
 msgctxt "group-name"
 msgid "revolve"
-msgstr "тело-вращения"
+msgstr "тело-вращения-на-угол"
 
 #: group.cpp:234
 msgid "Helix operation can only be applied to planar sketches."
@@ -2219,7 +2219,7 @@ msgstr "Создать группу выдавливания текущего э
 
 #: toolbar.cpp:70
 msgid "New group rotating active sketch"
-msgstr "Создать группу вращения текущего эскиза"
+msgstr "Создать группу тела вращения текущего эскиза"
 
 #: toolbar.cpp:72
 msgid "New group helix from active sketch"
@@ -2227,7 +2227,7 @@ msgstr "Создать группу тела выдавливания по ви
 
 #: toolbar.cpp:74
 msgid "New group revolve active sketch"
-msgstr "Создать группу тела вращения из текущего эскиза"
+msgstr "Создать группу тела вращения на угол из текущего эскиза"
 
 #: toolbar.cpp:76
 msgid "New group step and repeat rotating"

src/CMakeLists.txt

@@ -82,7 +82,9 @@ target_compile_definitions(slvs
     PRIVATE -DLIBRARY)
 
 target_include_directories(slvs
-    PUBLIC ${CMAKE_SOURCE_DIR}/include)
+    PUBLIC
+        ${CMAKE_SOURCE_DIR}/include
+        ${EIGEN3_INCLUDE_DIRS})
 
 target_link_libraries(slvs PRIVATE slvs_deps)
 
@@ -101,7 +103,8 @@ endif()
 set(every_platform_SOURCES
     platform/guiwin.cpp
     platform/guigtk.cpp
-    platform/guimac.mm)
+    platform/guimac.mm
+    platform/guihtml.cpp)
 
 # solvespace library
 
@@ -166,6 +169,7 @@ add_library(solvespace-core STATIC
     srf/merge.cpp
     srf/ratpoly.cpp
     srf/raycast.cpp
+    srf/shell.cpp
     srf/surface.cpp
     srf/surfinter.cpp
     srf/triangulate.cpp)
@@ -300,6 +304,56 @@ if(ENABLE_GUI)
             XCODE_ATTRIBUTE_ENABLE_HARDENED_RUNTIME "YES"
             XCODE_ATTRIBUTE_PRODUCT_BUNDLE_IDENTIFIER "com.solvespace"
             RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+    elseif(EMSCRIPTEN)
+        set(SHELL ${CMAKE_CURRENT_SOURCE_DIR}/platform/html/emshell.html)
+        set(LINK_FLAGS
+            --bind --shell-file ${SHELL}
+            --no-heap-copy -s ALLOW_MEMORY_GROWTH=1 -s WASM=1 -s ASYNCIFY=1
+            -s DYNCALLS=1 -s ASSERTIONS=1
+            -s TOTAL_STACK=33554432 -s TOTAL_MEMORY=134217728)
+
+        get_target_property(resource_names resources NAMES)
+        foreach(resource ${resource_names})
+            list(APPEND LINK_FLAGS --preload-file ${resource})
+        endforeach()
+
+        if(CMAKE_BUILD_TYPE STREQUAL Debug)
+            list(APPEND LINK_FLAGS
+                --emrun --emit-symbol-map
+                -s DEMANGLE_SUPPORT=1
+                -s SAFE_HEAP=1)
+        endif()
+
+        target_sources(solvespace PRIVATE
+            platform/guihtml.cpp)
+
+        string(REPLACE ";" " " LINK_FLAGS "${LINK_FLAGS}")
+        set_target_properties(solvespace PROPERTIES
+            LINK_FLAGS "${LINK_FLAGS}")
+        set_source_files_properties(platform/guihtml.cpp PROPERTIES
+            OBJECT_DEPENDS ${SHELL})
+
+        add_custom_command(
+            TARGET solvespace POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                    ${CMAKE_CURRENT_SOURCE_DIR}/platform/html/solvespaceui.css
+                    ${EXECUTABLE_OUTPUT_PATH}/solvespaceui.css
+            COMMENT "Copying UI stylesheet"
+            VERBATIM)
+        add_custom_command(
+            TARGET solvespace POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                    ${CMAKE_CURRENT_SOURCE_DIR}/platform/html/solvespaceui.js
+                    ${EXECUTABLE_OUTPUT_PATH}/solvespaceui.js
+            COMMENT "Copying UI script solvespaceui.js"
+            VERBATIM)
+        add_custom_command(
+            TARGET solvespace POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                    ${CMAKE_CURRENT_SOURCE_DIR}/platform/html/filemanagerui.js
+                    ${EXECUTABLE_OUTPUT_PATH}/filemanagerui.js
+            COMMENT "Copying UI script filemanagerui.sj"
+            VERBATIM)
     else()
         target_sources(solvespace PRIVATE
             platform/guigtk.cpp)
@@ -335,7 +389,8 @@ target_compile_definitions(solvespace-headless
     PRIVATE HEADLESS)
 
 target_include_directories(solvespace-headless
-    INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+    INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
+    PUBLIC ${EIGEN3_INCLUDE_DIRS})
 
 target_link_libraries(solvespace-headless
     PRIVATE
@@ -363,7 +418,7 @@ endif()
 
 # solvespace unix package
 
-if(NOT (WIN32 OR APPLE))
+if(NOT (WIN32 OR APPLE OR EMSCRIPTEN))
     if(ENABLE_GUI)
         install(TARGETS solvespace
             RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

src/constraint.cpp

@@ -721,7 +721,11 @@ void Constraint::MenuConstrain(Command id) {
         }
 
         case Command::PARALLEL:
-            if(gs.vectors == 2 && gs.n == 2) {
+            if(gs.faces == 2 && gs.n == 2) {
+                c.type = Type::PARALLEL;
+                c.entityA = gs.face[0];
+                c.entityB = gs.face[1];            
+            } else if(gs.vectors == 2 && gs.n == 2) {
                 c.type = Type::PARALLEL;
                 c.entityA = gs.vector[0];
                 c.entityB = gs.vector[1];
@@ -765,6 +769,7 @@ void Constraint::MenuConstrain(Command id) {
             } else {
                 Error(_("Bad selection for parallel / tangent constraint. This "
                         "constraint can apply to:\n\n"
+                        "    * two faces\n"
                         "    * two line segments (parallel)\n"
                         "    * a line segment and a normal (parallel)\n"
                         "    * two normals (parallel)\n"
@@ -776,13 +781,18 @@ void Constraint::MenuConstrain(Command id) {
             break;
 
         case Command::PERPENDICULAR:
-            if(gs.vectors == 2 && gs.n == 2) {
+            if(gs.faces == 2 && gs.n == 2) {
+                c.type = Type::PERPENDICULAR;
+                c.entityA = gs.face[0];
+                c.entityB = gs.face[1];            
+            } else if(gs.vectors == 2 && gs.n == 2) {
                 c.type = Type::PERPENDICULAR;
                 c.entityA = gs.vector[0];
                 c.entityB = gs.vector[1];
             } else {
                 Error(_("Bad selection for perpendicular constraint. This "
                         "constraint can apply to:\n\n"
+                        "    * two faces\n"
                         "    * two line segments\n"
                         "    * a line segment and a normal\n"
                         "    * two normals\n"));

src/describescreen.cpp

@@ -89,6 +89,7 @@ void TextWindow::DescribeSelection() {
             case Entity::Type::POINT_N_ROT_TRANS:
             case Entity::Type::POINT_N_COPY:
             case Entity::Type::POINT_N_ROT_AA:
+            case Entity::Type::POINT_N_ROT_AXIS_TRANS:
                 p = e->PointGetNum();
                 Printf(false, "%FtPOINT%E at " PT_AS_STR, COSTR(e, p));
                 break;
@@ -171,6 +172,7 @@ void TextWindow::DescribeSelection() {
                 double r = e->CircleGetRadiusNum();
                 Printf(true,  "      diameter =  %Fi%s", SS.MmToString(r*2).c_str());
                 Printf(false, "        radius =  %Fi%s", SS.MmToString(r).c_str());
+                Printf(false, " circumference =  %Fi%s", SS.MmToString(2*M_PI*r).c_str());
                 break;
             }
             case Entity::Type::FACE_NORMAL_PT:
@@ -178,6 +180,8 @@ void TextWindow::DescribeSelection() {
             case Entity::Type::FACE_N_ROT_TRANS:
             case Entity::Type::FACE_N_ROT_AA:
             case Entity::Type::FACE_N_TRANS:
+            case Entity::Type::FACE_ROT_NORMAL_PT:
+            case Entity::Type::FACE_N_ROT_AXIS_TRANS:
                   Printf(false, "%FtPLANE FACE%E");
                 p = e->FaceGetNormalNum();
                 Printf(true,  "   normal = " PT_AS_NUM, CO(p));
@@ -424,14 +428,19 @@ void TextWindow::DescribeSelection() {
             double d = (p1.Minus(p0)).Dot(n0);
             Printf(true,  "      distance = %Fi%s", SS.MmToString(d).c_str());
         }
-    } else if(gs.n == 0 && gs.stylables > 0) {
-        Printf(false, "%FtSELECTED:%E comment text");
     } else if(gs.n == 0 && gs.constraints == 1) {
         Constraint *c = SK.GetConstraint(gs.constraint[0]);
         const std::string &desc = c->DescriptionString().c_str();
 
         if(c->type == Constraint::Type::COMMENT) {
             Printf(false, "%FtCOMMENT%E  %s", desc.c_str());
+            if(c->ptA != Entity::NO_ENTITY) {
+                Vector p = SK.GetEntity(c->ptA)->PointGetNum();
+                Printf(true,  "  attached to point at: " PT_AS_STR, COSTR(SK.GetEntity(c->ptA), p));
+                Vector dv = c->disp.offset;
+                Printf(false, "    distance = %Fi%s", SS.MmToString(dv.Magnitude()).c_str());
+                Printf(false, "  d(x, y, z) = " PT_AS_STR_NO_LINK, COSTR_NO_LINK(dv));
+            }
         } else if(c->HasLabel()) {
             if(c->reference) {
                 Printf(false, "%FtREFERENCE%E  %s", desc.c_str());

src/entity.cpp

@@ -26,6 +26,9 @@ bool EntityBase::HasVector() const {
 }
 
 ExprVector EntityBase::VectorGetExprsInWorkplane(hEntity wrkpl) const {
+    if(IsFace()) {
+        return FaceGetNormalExprs();
+    }
     switch(type) {
         case Type::LINE_SEGMENT:
             return (SK.GetEntity(point[0])->PointGetExprsInWorkplane(wrkpl)).Minus(
@@ -62,6 +65,9 @@ ExprVector EntityBase::VectorGetExprs() const {
 }
 
 Vector EntityBase::VectorGetNum() const {
+    if(IsFace()) {
+        return FaceGetNormalNum();
+    }
     switch(type) {
         case Type::LINE_SEGMENT:
             return (SK.GetEntity(point[0])->PointGetNum()).Minus(
@@ -79,6 +85,9 @@ Vector EntityBase::VectorGetNum() const {
 }
 
 Vector EntityBase::VectorGetRefPoint() const {
+    if(IsFace()) {
+        return FaceGetPointNum();
+    }
     switch(type) {
         case Type::LINE_SEGMENT:
             return ((SK.GetEntity(point[0])->PointGetNum()).Plus(

src/file.cpp

@@ -918,7 +918,7 @@ try_again:
             switch(LocateImportedFile(linkFileRelative, canCancel)) {
                 case Platform::MessageDialog::Response::YES: {
                     Platform::FileDialogRef dialog = Platform::CreateOpenFileDialog(SS.GW.window);
-                    dialog->AddFilters(Platform::SolveSpaceModelFileFilters);
+                    dialog->AddFilters(Platform::SolveSpaceLinkFileFilters);
                     dialog->ThawChoices(settings, "LinkSketch");
                     dialog->SuggestFilename(linkFileRelative);
                     if(dialog->RunModal()) {

src/graphicswin.cpp

@@ -433,6 +433,11 @@ void GraphicsWindow::Init() {
             // a canvas.
             window->SetMinContentSize(720, /*ToolbarDrawOrHitTest 636*/ 32 * 18 + 3 * 16 + 8 + 4);
             window->onClose = std::bind(&SolveSpaceUI::MenuFile, Command::EXIT);
+            window->onContextLost = [&] {
+                canvas = NULL;
+                persistentCanvas = NULL;
+                persistentDirty = true;
+            };
             window->onRender = std::bind(&GraphicsWindow::Paint, this);
             window->onKeyboardEvent = std::bind(&GraphicsWindow::KeyboardEvent, this, _1);
             window->onMouseEvent = std::bind(&GraphicsWindow::MouseEvent, this, _1);
@@ -712,16 +717,47 @@ double GraphicsWindow::ZoomToFit(const Camera &camera,
     return scale;
 }
 
+
+void GraphicsWindow::ZoomToMouse(double zoomMultiplyer) {
+    double offsetRight = offset.Dot(projRight);
+    double offsetUp    = offset.Dot(projUp);
+
+    double width, height;
+    window->GetContentSize(&width, &height);
+
+    double righti = currentMousePosition.x / scale - offsetRight;
+    double upi    = currentMousePosition.y / scale - offsetUp;
+
+    // zoomMultiplyer of 1 gives a default zoom factor of 1.2x: zoomMultiplyer * 1.2
+    // zoom = adjusted zoom negative zoomMultiplyer will zoom out, positive will zoom in
+    //
+
+    scale *= exp(0.1823216 * zoomMultiplyer); // ln(1.2) = 0.1823216
+
+    double rightf = currentMousePosition.x / scale - offsetRight;
+    double upf    = currentMousePosition.y / scale - offsetUp;
+
+    offset = offset.Plus(projRight.ScaledBy(rightf - righti));
+    offset = offset.Plus(projUp.ScaledBy(upf - upi));
+
+    if(SS.TW.shown.screen == TextWindow::Screen::EDIT_VIEW) {
+        if(havePainted) {
+            SS.ScheduleShowTW();
+        }
+    }
+    havePainted = false;
+    Invalidate();
+}
+
+
 void GraphicsWindow::MenuView(Command id) {
     switch(id) {
         case Command::ZOOM_IN:
-            SS.GW.scale *= 1.2;
+            SS.GW.ZoomToMouse(1);
-            SS.ScheduleShowTW();
             break;
 
         case Command::ZOOM_OUT:
-            SS.GW.scale /= 1.2;
+            SS.GW.ZoomToMouse(-1);
-            SS.ScheduleShowTW();
             break;
 
         case Command::ZOOM_TO_FIT:
@@ -781,13 +817,18 @@ void GraphicsWindow::MenuView(Command id) {
             Quaternion quatf = quat0;
             double dmin = 1e10;
 
-            // There are 24 possible views; 3*2*2*2
+            // There are 24 possible views (3*2*2*2), if all are
-            int i, j, negi, negj;
+            // allowed.  If the user is in turn-table mode, the
-            for(i = 0; i < 3; i++) {
+            // isometric view must have the z-axis facing up, leaving
-                for(j = 0; j < 3; j++) {
+            // 8 possible views (2*1*2*2).
+
+            bool require_turntable = (id==Command::NEAREST_ISO && SS.turntableNav);
+            for(int i = 0; i < 3; i++) {
+                for(int j = 0; j < 3; j++) {
                     if(i == j) continue;
-                    for(negi = 0; negi < 2; negi++) {
+                    if(require_turntable && (j!=2)) continue;
-                        for(negj = 0; negj < 2; negj++) {
+                    for(int negi = 0; negi < 2; negi++) {
+                        for(int negj = 0; negj < 2; negj++) {
                             Vector ou = ortho[i], ov = ortho[j];
                             if(negi) ou = ou.ScaledBy(-1);
                             if(negj) ov = ov.ScaledBy(-1);

src/mouse.cpp

@@ -914,7 +914,7 @@ bool GraphicsWindow::MouseEvent(Platform::MouseEvent event) {
             break;
 
         case MouseEvent::Type::SCROLL_VERT:
-            this->MouseScroll(event.x, event.y, event.shiftDown ? event.scrollDelta / 10 : event.scrollDelta);
+            this->MouseScroll(event.shiftDown ? event.scrollDelta / 10 : event.scrollDelta);
             break;
 
         case MouseEvent::Type::LEAVE:
@@ -1478,17 +1478,10 @@ void GraphicsWindow::EditControlDone(const std::string &s) {
     }
 }
 
-void GraphicsWindow::MouseScroll(double x, double y, double delta) {
+void GraphicsWindow::MouseScroll(double zoomMultiplyer) {
-    double offsetRight = offset.Dot(projRight);
-    double offsetUp = offset.Dot(projUp);
-
-    double righti = x/scale - offsetRight;
-    double upi = y/scale - offsetUp;
-
-    // The default zoom factor is 1.2x for one scroll wheel click (delta==1).
     // To support smooth scrolling where scroll wheel events come in increments
     // smaller (or larger) than 1 we do:
-    //     scale *= exp(ln(1.2) * delta);
+    //     scale *= exp(ln(1.2) * zoomMultiplyer);
     // to ensure that the same total scroll delta always results in the same
     // total zoom irrespective of in how many increments the zoom was applied.
     // For example if we scroll a total delta of a+b in two events vs. one then
@@ -1496,21 +1489,7 @@ void GraphicsWindow::MouseScroll(double x, double y, double delta) {
     // while
     //     scale * a * b != scale * (a+b)
     // So this constant is ln(1.2) = 0.1823216 to make the default zoom 1.2x
-    scale *= exp(0.1823216 * delta);
+    ZoomToMouse(zoomMultiplyer);
-
-    double rightf = x/scale - offsetRight;
-    double upf = y/scale - offsetUp;
-
-    offset = offset.Plus(projRight.ScaledBy(rightf - righti));
-    offset = offset.Plus(projUp.ScaledBy(upf - upi));
-
-    if(SS.TW.shown.screen == TextWindow::Screen::EDIT_VIEW) {
-        if(havePainted) {
-            SS.ScheduleShowTW();
-        }
-    }
-    havePainted = false;
-    Invalidate();
 }
 
 void GraphicsWindow::MouseLeave() {

src/platform/gui.h

@@ -221,6 +221,7 @@ public:
     std::function<bool(KeyboardEvent)>  onKeyboardEvent;
     std::function<void(std::string)>    onEditingDone;
     std::function<void(double)>         onScrollbarAdjusted;
+    std::function<void()>               onContextLost;
     std::function<void()>               onRender;
 
     virtual ~Window() = default;
@@ -229,7 +230,7 @@ public:
     virtual double GetPixelDensity() = 0;
     // Returns raster graphics and coordinate scale (already applied on the platform side),
     // i.e. size of logical pixel in physical pixels, or device pixel ratio.
-    virtual int GetDevicePixelRatio() = 0;
+    virtual double GetDevicePixelRatio() = 0;
     // Returns (fractional) font scale, to be applied on top of (integral) device pixel ratio.
     virtual double GetDeviceFontScale() {
         return GetPixelDensity() / GetDevicePixelRatio() / 96.0;

src/platform/guigtk.cpp

@@ -889,7 +889,7 @@ public:
         return gtkWindow.get_screen()->get_resolution();
     }
 
-    int GetDevicePixelRatio() override {
+    double GetDevicePixelRatio() override {
         return gtkWindow.get_scale_factor();
     }
 

src/platform/guimac.mm

@@ -372,7 +372,8 @@ MenuBarRef GetOrCreateMainMenu(bool *unique) {
     double             rotationGestureCurrent;
     Point2d            trackpadPositionShift;
     bool               inTrackpadScrollGesture;
-    int                numTouches;
+    int                activeTrackpadTouches;
+    bool               scrollFromTrackpadTouch;
     Platform::Window::Kind kind;
 }
 
@@ -398,7 +399,8 @@ MenuBarRef GetOrCreateMainMenu(bool *unique) {
         editor.action = @selector(didEdit:);
 
         inTrackpadScrollGesture = false;
-        numTouches = 0;
+        activeTrackpadTouches = 0;
+        scrollFromTrackpadTouch = false;
         self.acceptsTouchEvents = YES;
         kind = aKind;
         if(kind == Platform::Window::Kind::TOPLEVEL) {
@@ -576,9 +578,16 @@ MenuBarRef GetOrCreateMainMenu(bool *unique) {
     using Platform::MouseEvent;
 
     MouseEvent event = [self convertMouseEvent:nsEvent];
-    // Check for number of touches to exclude single-finger scrolling on Magic Mouse
+    if(nsEvent.phase == NSEventPhaseBegan) {
-    bool isTrackpadEvent = numTouches >= 2 && nsEvent.subtype == NSEventSubtypeTabletPoint;
+        // If this scroll began on trackpad then touchesBeganWithEvent was called prior to this
-    if(isTrackpadEvent && kind == Platform::Window::Kind::TOPLEVEL) {
+        // event and we have at least one active trackpad touch. We store this information so we
+        // can handle scroll originating from trackpad differently below.
+        scrollFromTrackpadTouch = activeTrackpadTouches > 0 &&
+            nsEvent.subtype == NSEventSubtypeTabletPoint &&
+            kind == Platform::Window::Kind::TOPLEVEL;
+    }
+    // Check if we are scrolling on trackpad and handle things differently.
+    if(scrollFromTrackpadTouch) {
         // This is how Cocoa represents 2 finger trackpad drag gestures, rather than going via
         // NSPanGestureRecognizer which is how you might expect this to work... We complicate this
         // further by also handling shift-two-finger-drag to mean rotate. Fortunately we're using
@@ -632,20 +641,15 @@ MenuBarRef GetOrCreateMainMenu(bool *unique) {
 }
 
 - (void)touchesBeganWithEvent:(NSEvent *)event {
-    numTouches = [event touchesMatchingPhase:NSTouchPhaseTouching inView:self].count;
+    activeTrackpadTouches++;
-    [super touchesBeganWithEvent:event];
-}
-- (void)touchesMovedWithEvent:(NSEvent *)event {
-    numTouches = [event touchesMatchingPhase:NSTouchPhaseTouching inView:self].count;
-    [super touchesMovedWithEvent:event];
 }
+
 - (void)touchesEndedWithEvent:(NSEvent *)event {
-    numTouches = [event touchesMatchingPhase:NSTouchPhaseTouching inView:self].count;
+    activeTrackpadTouches--;
-    [super touchesEndedWithEvent:event];
 }
+
 - (void)touchesCancelledWithEvent:(NSEvent *)event {
-    numTouches = 0;
+    activeTrackpadTouches--;
-    [super touchesCancelledWithEvent:event];
 }
 
 - (void)mouseExited:(NSEvent *)nsEvent {
@@ -983,10 +987,10 @@ public:
         return (displayPixelSize.width / displayPhysicalSize.width) * 25.4f;
     }
 
-    int GetDevicePixelRatio() override {
+    double GetDevicePixelRatio() override {
         NSSize unitSize = { 1.0f, 0.0f };
         unitSize = [ssView convertSizeToBacking:unitSize];
-        return (int)unitSize.width;
+        return unitSize.width;
     }
 
     bool IsVisible() override {

src/platform/guiwin.cpp

@@ -793,7 +793,7 @@ public:
                 break;
 
             case WM_SIZING: {
-                int pixelRatio = window->GetDevicePixelRatio();
+                double pixelRatio = window->GetDevicePixelRatio();
 
                 RECT rcw, rcc;
                 sscheck(GetWindowRect(window->hWindow, &rcw));
@@ -806,10 +806,10 @@ public:
                 int adjHeight = rc->bottom - rc->top;
 
                 adjWidth  -= nonClientWidth;
-                adjWidth   = max(window->minWidth * pixelRatio, adjWidth);
+                adjWidth   = max((int)(window->minWidth * pixelRatio), adjWidth);
                 adjWidth += nonClientWidth;
                 adjHeight -= nonClientHeight;
-                adjHeight  = max(window->minHeight * pixelRatio, adjHeight);
+                adjHeight  = max((int)(window->minHeight * pixelRatio), adjHeight);
                 adjHeight += nonClientHeight;
                 switch(wParam) {
                     case WMSZ_RIGHT:
@@ -868,7 +868,7 @@ public:
             case WM_MOUSEMOVE:
             case WM_MOUSEWHEEL:
             case WM_MOUSELEAVE: {
-                int pixelRatio = window->GetDevicePixelRatio();
+                double pixelRatio = window->GetDevicePixelRatio();
 
                 MouseEvent event = {};
                 event.x = GET_X_LPARAM(lParam) / pixelRatio;
@@ -941,7 +941,7 @@ public:
                         event.y = pt.y / pixelRatio;
 
                         event.type = MouseEvent::Type::SCROLL_VERT;
-                        event.scrollDelta = GET_WHEEL_DELTA_WPARAM(wParam) / WHEEL_DELTA;
+                        event.scrollDelta = GET_WHEEL_DELTA_WPARAM(wParam) / (double)WHEEL_DELTA;
                         break;
 
                     case WM_MOUSELEAVE:
@@ -1109,10 +1109,10 @@ public:
         return (double)dpi;
     }
 
-    int GetDevicePixelRatio() override {
+    double GetDevicePixelRatio() override {
         UINT dpi;
         sscheck(dpi = ssGetDpiForWindow(hWindow));
-        return dpi / USER_DEFAULT_SCREEN_DPI;
+        return (double)dpi / USER_DEFAULT_SCREEN_DPI;
     }
 
     bool IsVisible() override {
@@ -1177,7 +1177,7 @@ public:
     }
 
     void GetContentSize(double *width, double *height) override {
-        int pixelRatio = GetDevicePixelRatio();
+        double pixelRatio = GetDevicePixelRatio();
 
         RECT rc;
         sscheck(GetClientRect(hWindow, &rc));
@@ -1189,15 +1189,15 @@ public:
         minWidth  = (int)width;
         minHeight = (int)height;
 
-        int pixelRatio = GetDevicePixelRatio();
+        double pixelRatio = GetDevicePixelRatio();
 
         RECT rc;
         sscheck(GetClientRect(hWindow, &rc));
         if(rc.right  - rc.left < minWidth * pixelRatio) {
-            rc.right  = rc.left + minWidth  * pixelRatio;
+            rc.right  = rc.left + (LONG)(minWidth  * pixelRatio);
         }
         if(rc.bottom - rc.top < minHeight * pixelRatio) {
-            rc.bottom = rc.top  + minHeight * pixelRatio;
+            rc.bottom = rc.top  + (LONG)(minHeight * pixelRatio);
         }
     }
 
@@ -1270,7 +1270,7 @@ public:
         tooltipText = newText;
 
         if(!newText.empty()) {
-            int pixelRatio = GetDevicePixelRatio();
+            double pixelRatio = GetDevicePixelRatio();
             RECT toolRect;
             toolRect.left   = (int)(x * pixelRatio);
             toolRect.top    = (int)(y * pixelRatio);
@@ -1301,9 +1301,9 @@ public:
                     bool isMonospace, const std::string &text) override {
         if(IsEditorVisible()) return;
 
-        int pixelRatio = GetDevicePixelRatio();
+        double pixelRatio = GetDevicePixelRatio();
 
-        HFONT hFont = CreateFontW(-(LONG)fontHeight * GetDevicePixelRatio(), 0, 0, 0,
+        HFONT hFont = CreateFontW(-(int)(fontHeight * GetDevicePixelRatio()), 0, 0, 0,
             FW_REGULAR, FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
             DEFAULT_QUALITY, FF_DONTCARE, isMonospace ? L"Lucida Console" : L"Arial");
         if(hFont == NULL) {
@@ -1324,12 +1324,12 @@ public:
         sscheck(ReleaseDC(hEditor, hDc));
 
         RECT rc;
-        rc.left   = (LONG)x * pixelRatio;
+        rc.left   = (LONG)(x * pixelRatio);
-        rc.top    = (LONG)y * pixelRatio - tm.tmAscent;
+        rc.top    = (LONG)(y * pixelRatio) - tm.tmAscent;
         // Add one extra char width to avoid scrolling.
-        rc.right  = (LONG)x * pixelRatio +
+        rc.right  = (LONG)(x * pixelRatio) +
-                    std::max((LONG)minWidth * pixelRatio, ts.cx + tm.tmAveCharWidth);
+                    std::max((LONG)(minWidth * pixelRatio), ts.cx + tm.tmAveCharWidth);
-        rc.bottom = (LONG)y * pixelRatio + tm.tmDescent;
+        rc.bottom = (LONG)(y * pixelRatio) + tm.tmDescent;
         sscheck(ssAdjustWindowRectExForDpi(&rc, 0, /*bMenu=*/FALSE, WS_EX_CLIENTEDGE,
 			                               ssGetDpiForWindow(hWindow)));
 
@@ -1608,7 +1608,7 @@ public:
 
     void AddFilter(std::string name, std::vector<std::string> extensions) override {
         std::string desc, patterns;
-        for(auto extension : extensions) {
+        for(auto &extension : extensions) {
             std::string pattern = "*." + extension;
             if(!desc.empty()) desc += ", ";
             desc += pattern;

src/platform/html/emshell.html

@@ -0,0 +1,91 @@
+<!doctype html>
+<html><!--
+ --><head><!--
+     --><meta charset="utf-8"><!--
+     --><title>SolveSpace Web Edition (EXPERIMENTAL)</title><!--
+     --><link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.1/css/all.css" integrity="sha384-O8whS3fhG2OnA5Kas0Y9l3cfpmYjapjI0E4theH4iuMD+pLhbf6JI0jIMfYcK3yZ" crossorigin="anonymous"><!--
+     --><link rel="stylesheet" href="solvespaceui.css"><!--
+     --><script src="solvespaceui.js"></script><!--
+     --><script src="filemanagerui.js"></script><!--
+ --></head><!--
+ --><body><!--
+     --><div id="splash">
+            <div class="center">
+                <div id="spinner"></div>
+                <div id="status">Downloading...</div>
+                <div id="crash" style="display:none;">
+                    SolveSpace has crashed. See console for details.<br>
+                    The Web Edition of SolveSpace is experimental,<br>
+                    and may not be as reliable as the Desktop Edition.<br>
+                    <a href="javascript:window.location.reload()">Restart</a>
+                </div>
+                <progress id="progress" value="0" max="100" hidden="1"></progress>
+            </div>
+        </div><!--
+        --><main><!--
+            FIXME(emscripten): without this, a window resize is required in Chrome
+            to get the layout to update and canvas size to match up. What?
+        --><ul class="menu menubar" style="visibility: hidden"><li>None</li></ul><!--
+        --><div id="container"><!--
+            --><div id="container0"><canvas id="canvas0"></canvas></div><!--
+            --><div id="view_separator"></div><!--
+            --><div id="container1parent"><!--
+                --><div id="container1"><canvas id="canvas1"></canvas></div><!--
+                --><div id="canvas1scrollbarbox"><!--
+                    --><div id="canvas1scrollbar"></div><!--
+                --></div><!--
+            --></div><!--
+        --></div><!--
+        --></main><!--
+     --><script type="text/javascript">
+        var splashElement   = document.getElementById('splash');
+        var spinnerElement  = document.getElementById('spinner');
+        var statusElement   = document.getElementById('status');
+        var progressElement = document.getElementById('progress');
+        var crashElement    = document.getElementById('crash');
+        var canvas0Element  = document.getElementById('canvas0');
+        var canvas1Element  = document.getElementById('canvas1');
+
+        canvas0Element.oncontextmenu = function(event) { event.preventDefault(); }
+        canvas1Element.oncontextmenu = function(event) { event.preventDefault(); }
+
+        var Module = {
+            preRun: [],
+            postRun: [],
+            print: console.log,
+            printErr: console.error,
+            state: 'loading',
+            setStatus: function(text) {
+                if(this.state == 'crashed') {
+                    spinnerElement.style.display = 'none';
+                    statusElement.style.display = 'none';
+                    crashElement.style.display = '';
+                    splashElement.style.display = '';
+                } else if(text != '') {
+                    console.log('Status:', text);
+                    statusElement.innerText = text;
+                } else if(this.state != 'done') {
+                    console.log('Status: Done!');
+                    splashElement.style.display = 'none';
+                    this.state = 'done';
+                }
+            },
+            totalDependencies: 0,
+            monitorRunDependencies: function(remainingDependencies) {
+                this.totalDependencies = Math.max(this.totalDependencies, remainingDependencies);
+                if(remainingDependencies > 0) {
+                    var completeDependencies = this.totalDependencies - remainingDependencies;
+                    Module.setStatus('Preparing... (' + completeDependencies + '/' +
+                                     this.totalDependencies + ')');
+                }
+            }
+        };
+        Module.setStatus('Downloading...');
+        window.onerror = function() {
+            Module.state = 'crashed';
+            Module.setStatus();
+            return false;
+        };
+        </script><!--
+     -->{{{ SCRIPT }}}<!--
+ --></body></html>

src/platform/html/filemanagerui.js

@@ -0,0 +1,525 @@
+"use strict";
+
+const FileManagerUI_OPEN = 0;
+const FileManagerUI_SAVE = FileManagerUI_OPEN + 1;
+const FileManagerUI_BROWSE = FileManagerUI_SAVE + 1;
+
+//FIXME(emscripten): File size thresholds. How large file can we accept safely ?
+
+/** Maximum filesize for a uploaded file. 
+ * @type {number} */
+const FileManagerUI_UPLOAD_FILE_SIZE_LIMIT = 50 * 1000 * 1000;
+
+const tryMakeDirectory = (path) => {
+    try {
+        FS.mkdir(path);
+    } catch {
+        // NOP
+    }
+}
+
+
+class FileManagerUI {
+    /**
+     * @param {number} mode - dialog mode FileManagerUI_[ OPEN, SAVE, BROWSE ]
+     */
+    constructor(mode) {
+        /** @type {boolean} */
+        this.__isOpenDialog = false;
+        /** @type {boolean} */
+        this.__isSaveDialog = false;
+        /** @type {boolean} */
+        this.__isBrowseDialog = false;
+
+        if (mode == FileManagerUI_OPEN) {
+            this.__isOpenDialog = true;
+        } else if (mode == FileManagerUI_SAVE) {
+            this.__isSaveDialog = true;
+        } else {
+            this.__isBrowseDialog = true;
+        }
+
+        /** @type {boolean} true if the dialog is shown. */
+        this.__isShown = false;
+
+        /** @type {string[]}  */
+        this.__extension_filters = [".slvs"];
+
+        /** @type {string} */
+        this.__basePathInFilesystem = "";
+
+        /** @type {string} filename user selected. empty if nothing selected */
+        this.__selectedFilename = "";
+
+        this.__closedWithCancel = false;
+
+        this.__defaultFilename = "untitled";
+    }
+
+    /** deconstructor
+     */
+    dispose() {
+        if (this.__dialogRootElement) {
+            this.__dialogHeaderElement = null;
+            this.__descriptionElement = null;
+            this.__filelistElement = null;
+            this.__fileInputElement = null;
+            this.__saveFilenameInputElement = null;
+            this.__buttonContainerElement = null;
+            this.__dialogRootElement.parentElement.removeChild(this.__dialogRootElement);
+            this.__dialogRootElement = null;
+        }
+    }
+
+    /** 
+     * @param {string} label 
+     * @param {string} response 
+     * @param {bool} isDefault 
+     */
+    __addButton(label, response, isDefault, onclick) {
+        const buttonElem = document.createElement("div");
+        addClass(buttonElem, "button");
+        setLabelWithMnemonic(buttonElem, label);
+        if (isDefault) {
+            addClass(buttonElem, "default");
+            addClass(buttonElem, "selected");
+        }
+        buttonElem.addEventListener("click", () => {
+            if (onclick) {
+                if (onclick()) {
+                    this.__close();
+                }
+            } else {
+                this.__close();
+            }
+        });
+
+        this.__buttonContainerElement.appendChild(buttonElem);
+    }
+
+    /**
+     * @param {HTMLElement} div element that built
+     */
+    buildDialog() {
+        const root = document.createElement('div');
+        addClass(root, "modal");
+        root.style.display = "none";
+        root.style.zIndex = 1000;
+
+        const dialog = document.createElement('div');
+        addClass(dialog, "dialog");
+        addClass(dialog, "wide");
+        root.appendChild(dialog);
+
+        const messageHeader = document.createElement('strong');
+        this.__dialogHeaderElement = messageHeader;
+        addClass(messageHeader, "dialog_header");
+        dialog.appendChild(messageHeader);
+
+        const description = document.createElement('p');
+        this.__descriptionElement = description;
+        dialog.appendChild(description);
+
+        const filelistheader = document.createElement('h3');
+        filelistheader.textContent = 'Files:';
+        dialog.appendChild(filelistheader);
+
+        const filelist = document.createElement('ul');
+        this.__filelistElement = filelist;
+        addClass(filelist, 'filelist');
+        dialog.appendChild(filelist);
+
+        const dummyfilelistitem = document.createElement('li');
+        dummyfilelistitem.textContent = "(No file in psuedo filesystem)";
+        filelist.appendChild(dummyfilelistitem);
+
+        if (this.__isOpenDialog) {
+            const fileuploadcontainer = document.createElement('div');
+            dialog.appendChild(fileuploadcontainer);
+
+            const fileuploadheader = document.createElement('h3');
+            fileuploadheader.textContent = "Upload file:";
+            fileuploadcontainer.appendChild(fileuploadheader);
+
+            const dragdropdescription = document.createElement('p');
+            dragdropdescription.textContent = "(Drag & drop file to the following box)";
+            dragdropdescription.style.fontSize = "0.8em";
+            dragdropdescription.style.margin = "0.1em";
+            fileuploadcontainer.appendChild(dragdropdescription);
+
+            const filedroparea = document.createElement('div');
+            addClass(filedroparea, 'filedrop');
+            filedroparea.addEventListener('dragstart', (ev) => this.__onFileDragDrop(ev));
+            filedroparea.addEventListener('dragover', (ev) => this.__onFileDragDrop(ev));
+            filedroparea.addEventListener('dragleave', (ev) => this.__onFileDragDrop(ev));
+            filedroparea.addEventListener('drop', (ev) => this.__onFileDragDrop(ev));
+            fileuploadcontainer.appendChild(filedroparea);
+
+            const fileinput = document.createElement('input');
+            this.__fileInputElement = fileinput;
+            fileinput.setAttribute('type', 'file');
+            fileinput.style.width = "100%";
+            fileinput.addEventListener('change', (ev) => this.__onFileInputChanged(ev));
+            filedroparea.appendChild(fileinput);
+        
+        } else if (this.__isSaveDialog) {
+            const filenameinputcontainer = document.createElement('div');
+            dialog.appendChild(filenameinputcontainer);
+
+            const filenameinputheader = document.createElement('h3');
+            filenameinputheader.textContent = "Filename:";
+            filenameinputcontainer.appendChild(filenameinputheader);
+
+            const filenameinput = document.createElement('input');
+            filenameinput.setAttribute('type', 'input');
+            filenameinput.style.width = "90%";
+            filenameinput.style.margin = "auto 1em auto 1em";
+            this.__saveFilenameInputElement = filenameinput;
+            filenameinputcontainer.appendChild(filenameinput);
+        }
+
+        // Paragraph element for spacer
+        dialog.appendChild(document.createElement('p'));
+
+        const buttoncontainer = document.createElement('div');
+        this.__buttonContainerElement = buttoncontainer;
+        addClass(buttoncontainer, "buttons");
+        dialog.appendChild(buttoncontainer);
+
+        this.__addButton('OK', 0, false, () => {
+            if (this.__isOpenDialog) {
+                let selectedFilename = null;
+                const fileitems = document.querySelectorAll('input[type="radio"][name="filemanager_filelist"]');
+                Array.from(fileitems).forEach((radiobox) => {
+                    if (radiobox.checked) {
+                        selectedFilename = radiobox.parentElement.getAttribute('data-filename');
+                    }
+                });
+                if (selectedFilename) {
+                    return true;
+                } else {
+                    return false;
+                }
+            } else {
+                return true;
+            }
+        });
+
+        this.__addButton('Cancel', 1, true, () => {
+            this.__closedWithCancel = true;
+            return true;
+        });
+
+        return root;
+    }
+
+    /**
+     * @param {string} text 
+     */
+    setTitle(text) {
+        this.__dialogHeaderText = text;
+    }
+
+    /**
+     * @param {string} text
+     */
+    setDescription(text) {
+        this.__descriptionText = text;
+    }
+
+    /**
+     * @param {string} path file prefix. (ex) 'tmp/' to '/tmp/filename.txt'
+     */
+    setBasePath(path) {
+        this.__basePathInFilesystem = path;
+        tryMakeDirectory(path);
+    }
+
+    /**
+     * @param {string} filename 
+     */
+    setDefaultFilename(filename) {
+        this.__defaultFilename = filename;
+    }
+
+    /**
+     * 
+     * @param {string} filter comma-separated extensions like ".slvs,.stl;."
+     */
+    setFilter(filter) {
+        const exts = filter.split(',');
+        this.__extension_filters = exts;
+    }
+
+    __buildFileEntry(filename) {
+        const lielem = document.createElement('li');
+        const label = document.createElement('label');
+        label.setAttribute('data-filename', filename);
+        lielem.appendChild(label);
+        const radiobox = document.createElement('input');
+        radiobox.setAttribute('type', 'radio');
+        if (!this.__isOpenDialog) {
+            radiobox.style.display = "none";
+        }
+        radiobox.setAttribute('name', 'filemanager_filelist');
+        label.appendChild(radiobox);
+        const filenametext = document.createTextNode(filename);
+        label.appendChild(filenametext);
+
+        return lielem;
+    }
+
+    /**
+     * @returns {string[]} filename array
+     */
+    __getFileEntries() {
+        const basePath = this.__basePathInFilesystem;
+        /** @type {any[]} */
+        const nodes = FS.readdir(basePath);
+        /** @type {string[]} */
+        const files = nodes.filter((nodename) => {
+            return FS.isFile(FS.lstat(basePath + nodename).mode);
+        });
+        /*.map((filename) => {
+            return basePath + filename;
+        });*/
+        console.log(`__getFileEntries():`, files);
+        return files;
+    }
+    
+    /**
+     * @param {string[]?} files  file list already constructed
+     * @returns {string[]} filename array
+     */
+     __getFileEntries_recurse(basePath) {
+        //FIXME:remove try catch block
+        try {
+            //const basePath = this.__basePathInFilesystem;
+            FS.currentPath = basePath;
+            /** @type {any[]} */
+            const nodes = FS.readdir(basePath);
+
+            const filesInThisDirectory = nodes.filter((nodename) => {
+                return FS.isFile(FS.lstat(basePath + "/" + nodename).mode);
+            }).map((filename) => {
+                return basePath + "/" + filename;
+            });
+            let files = filesInThisDirectory;
+
+            const directories = nodes.filter((nodename) => {
+                return FS.isDir(FS.lstat(basePath + "/" + nodename).mode);
+            });
+
+            for (let i = 0; i < directories.length; i++) {
+                const directoryname = directories[i];
+                if (directoryname == '.' || directoryname == '..') {
+                    continue;
+                }
+                const orig_cwd = FS.currentPath;
+                const directoryfullpath = basePath + "/" + directoryname;
+                FS.currentPath = directoryfullpath;
+                files = files.concat(this.__getFileEntries_recurse(directoryfullpath));
+                FS.currentPath = orig_cwd;
+            }
+            
+            console.log(`__getFileEntries_recurse(): in "${basePath}"`, files);
+            return files;
+
+        } catch (excep) {
+            console.log(excep);
+            throw excep;
+        }
+    }
+
+    __updateFileList() {
+        console.log(`__updateFileList()`);
+        Array.from(this.__filelistElement.children).forEach((elem) => {
+            this.__filelistElement.removeChild(elem);
+        });
+        // const files = this.__getFileEntries();
+        FS.currentPath = this.__basePathInFilesystem;
+        const files = this.__getFileEntries_recurse(this.__basePathInFilesystem);
+        if (files.length < 1) {
+            const dummyfilelistitem = document.createElement('li');
+            dummyfilelistitem.textContent = "(No file in psuedo filesystem)";
+            this.__filelistElement.appendChild(dummyfilelistitem);
+
+        } else {
+            files.forEach((entry) => {
+                this.__filelistElement.appendChild(this.__buildFileEntry(entry));
+            });
+        }
+    }
+
+
+    /**
+     * @param {File} file 
+     */
+    __getFileAsArrayBuffer(file) {
+        return new Promise((resolve, reject) => {
+            const filereader = new FileReader();
+            filereader.onerror = (ev) => {
+                reject(ev);
+            };
+            filereader.onload = (ev) => {
+                resolve(ev.target.result);
+            };
+            filereader.readAsArrayBuffer(file);
+        });
+    }
+
+    /**
+     * 
+     * @param {File} file 
+     */
+    async __tryAddFile(file) {
+        return new Promise(async (resolve, reject) => {
+            if (!file) {
+                reject(new Error(`Invalid arg: file is ${file}`));
+
+            } else if (file.size > FileManagerUI_UPLOAD_FILE_SIZE_LIMIT) {
+                //FIXME(emscripten): Use our MessageDialog instead of browser's alert().
+                alert(`Specified file is larger than limit of ${FileManagerUI_UPLOAD_FILE_SIZE_LIMIT} bytes. Canceced.`);
+                reject(new Error(`File is too large: "${file.name} is ${file.size} bytes`));
+                
+            } else {
+                // Just add to Filesystem
+                const path = `${this.__basePathInFilesystem}${file.name}`;
+                const blobArrayBuffer = await this.__getFileAsArrayBuffer(file);
+                const u8array = new Uint8Array(blobArrayBuffer);
+                const fs = FS.open(path, "w");
+                FS.write(fs, u8array, 0, u8array.length, 0);
+                FS.close(fs);
+                resolve(); 
+            }
+        });
+    }
+
+    __addSelectedFile() {
+        if (this.__fileInputElement.files.length < 1) {
+            console.warn(`No file selected.`);
+            return;
+        }
+
+        const file = this.__fileInputElement.files[0];
+        this.__tryAddFile(file)
+            .then(() => {
+                this.__updateFileList();
+            })
+            .catch((err) => {
+                this.__fileInputElement.value = null;
+                console.error(err);
+            })
+    }
+
+    /**
+     * @param {DragEvent} ev 
+     */
+    __onFileDragDrop(ev) {
+        ev.preventDefault();
+        if (ev.type == "dragenter" || ev.type == "dragover" || ev.type == "dragleave") {
+            return;
+        }
+        if (ev.dataTransfer.files.length < 1) {
+            return;
+        }
+        this.__fileInputElement.files = ev.dataTransfer.files;
+
+        this.__addSelectedFile();
+    }
+
+    /**
+     * @param {InputEvent} _ev 
+     */
+    __onFileInputChanged(_ev) {
+        this.__addSelectedFile();
+    }
+
+
+    /** Show the FileManager UI dialog */
+    __show() {
+        this.__closedWithCancel = false;
+
+        /** @type {HTMLElement} */
+        this.__dialogRootElement = this.buildDialog();
+        document.querySelector('body').appendChild(this.__dialogRootElement);
+
+        this.__dialogHeaderElement.textContent = this.__dialogHeaderText || "File manager";
+        this.__descriptionElement.textContent = this.__descriptionText || "Select a file.";
+        if (this.__extension_filters) {
+            this.__descriptionElement.textContent += "Requested filter is " + this.__extension_filters.join(", ");
+        }
+
+        if (this.__isOpenDialog && this.__extension_filters) {
+            this.__fileInputElement.accept = this.__extension_filters.concat(',');
+        }
+
+        if (this.__isSaveDialog) {
+            this.__saveFilenameInputElement.value = this.__defaultFilename;
+        }
+
+        this.__dialogRootElement.style.display = "block";
+        this.__isShown = true;
+    }
+
+    /** Close the dialog */
+    __close() {
+        this.__selectedFilename = "";
+        if (this.__isOpenDialog) {
+            Array.from(document.querySelectorAll('input[type="radio"][name="filemanager_filelist"]'))
+                .forEach((elem) => {
+                    if (elem.checked) {
+                        this.__selectedFilename = elem.parentElement.getAttribute("data-filename");
+                    }
+                });
+        } else if (this.__isSaveDialog) {
+            if (!this.__closedWithCancel) {
+                this.__selectedFilename = this.__saveFilenameInputElement.value;
+            }
+        }
+
+        Array.from(this.__filelistElement.children).forEach((elem) => {
+            this.__filelistElement.removeChild(elem);
+        });
+
+        this.dispose();
+
+        this.__isShown = false;
+    }
+
+    /**
+     * @return {boolean}
+     */
+    isShown() {
+        return this.__isShown;
+    }
+
+    /**
+     * 
+     * @returns {Promise} filename string on resolved.
+     */
+    showModalAsync() {
+        return new Promise((resolve, reject) => {
+            this.__show();
+            this.__updateFileList();
+            const intervalTimer = setInterval(() => {
+                if (!this.isShown()) {
+                    clearInterval(intervalTimer);
+                    resolve(this.__selectedFilename);
+                }
+            }, 50);
+        });
+    }
+
+    getSelectedFilename() {
+        return this.__selectedFilename;
+    }
+
+    show() {
+        this.__show();
+        this.__updateFileList();
+    }
+};
+
+
+window.FileManagerUI = FileManagerUI;

src/platform/html/solvespaceui.css

@@ -0,0 +1,344 @@
+* {
+    font-family: sans;
+}
+html, body {
+    padding: 0;
+    margin:  0;
+    background: black;
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+}
+html, body, canvas, #splash, #container {
+    margin:  0;
+    padding: 0;
+    width:   100%;
+    height:  100%;
+}
+body {
+    overflow: hidden;
+}
+
+/* Splashscreen */
+#splash {
+    z-index: 1000;
+    background: black;
+    color: white;
+    position: absolute;
+}
+#splash .center {
+    position: absolute;
+    top:  50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    text-align: center;
+}
+#splash a {
+    color: white;
+}
+
+#spinner {
+    height: 30px;
+    width:  30px;
+    margin: 0px auto;
+    border-left:   10px solid rgb(255, 255, 255);
+    border-top:    10px solid rgb(0, 255, 0);
+    border-right:  10px solid rgb(255, 0, 255);
+    border-bottom: 10px solid rgb(0, 255, 0);
+    border-radius: 100%;
+    animation: rotation 3s linear infinite;
+    margin-bottom: 5px;
+}
+@keyframes rotation {
+    from  { transform: rotate(0deg);   }
+    to    { transform: rotate(360deg); }
+}
+
+/* Grid layout for main */
+main {
+    height: 100%;
+
+    /* Use CSS Grid layout for vertical placement. */
+    display: grid;
+    /* Row 0 for menubar (fit to content), Row 1 for canvas0, canvas1 (rest of space) */
+    grid-template-rows: auto 1fr;
+}
+
+/* Buttons */
+.button {
+    border: 1px solid hsl(0, 0%, 60%);
+    background: hsl(0, 0%, 10%);
+    color: white;
+    padding: 4px 8px;
+    cursor: default;
+}
+.button.selected {
+    background: hsl(0, 0%, 20%);
+}
+.button:hover {
+    background: hsl(0, 0%, 40%);
+}
+
+/* Editors */
+.editor {
+    position: fixed;
+    padding: 0;
+    border: none;
+}
+
+/* Menus */
+.menu {
+    font-size: 0;
+    margin:  0;
+    padding: 0;
+    padding-right: 10px;
+    list-style-type: none;
+    background: hsl(0, 0%, 20%);
+    color: white;
+    cursor: default;
+
+    -webkit-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+     user-select: none;
+}
+
+/* Normal menu items */
+.menu > li {
+    z-index: 100;
+    font-size: 16px;
+    display: inline-flex;
+    justify-content: space-between;
+    align-items: center;
+    white-space: nowrap;
+    position: relative;
+    width: 100%;
+    height: 19px;
+    margin: 2px;
+    padding: 3px;
+}
+.menu > li::before, .menu > li::after {
+    font-family: 'Font Awesome 5 Free';
+    font-weight: 900;
+    font-size: 12px;
+}
+.menu > li.hover,
+.menu > li.selected,
+.menu.menubar > li:hover:not(.selected) {
+    background: hsl(0, 0%, 30%);
+}
+.menu > li.disabled {
+    color: hsl(0, 0%, 30%);
+}
+
+/* Check and radio menu items */
+.menu > li {
+    padding-left: 24px;
+}
+.menu > li::before {
+    position: absolute;
+    text-align: center;
+    left: 0px;
+    width: 24px;
+}
+.menu > li.check::before {
+    content: '\f0c8';
+}
+.menu > li.check.active::before {
+    content: '\f14a';
+}
+.menu > li.radio::before {
+    content: '\f111';
+}
+.menu > li.radio.active::before {
+    content: '\f192';
+}
+
+/* Separator menu items */
+.menu > li.separator {
+    height: 0px;
+    border-top: 1px solid hsl(0, 0%, 30%);
+    margin: 0 2px 0 2px;
+    padding-top: 0;
+    padding-bottom: 0;
+}
+
+/* Accelerators */
+.menu > li > .accel {
+    text-align: right;
+    margin-left: 20px;
+}
+
+/* Submenus */
+.menu > li > .menu,
+.menu.popup {
+    display: none;
+    white-space: normal;
+    padding-right: 31px;
+}
+.menu > li.has-submenu::after {
+    content: '\f0da';
+}
+.menu > li.selected > .menu,
+.menu > li.hover > .menu,
+.menu.popup {
+    display: block;
+    background: hsl(0, 0%, 10%);
+    border: 1px solid hsl(0, 0%, 30%);
+    position: absolute;
+    left: 100%;
+    top: -3px;
+}
+
+/* Popup menus */
+.menu.popup {
+    display: block;
+    position: absolute;
+    width: min-content;
+}
+
+/* Menubars */
+.menubar {
+    padding-left: 5px;
+}
+.menubar > li {
+    width: auto;
+    width: fit-content;
+    margin: 0;
+    padding: 5px;
+}
+.menubar > li.selected {
+    background: hsl(0, 0%, 10%);
+    border: 1px solid hsl(0, 0%, 30%);
+    padding: 4px;
+}
+.menubar.menu > li.selected > .menu {
+    display: block;
+    position: absolute;
+    left: -1px;
+    top: 27px;
+}
+
+/* Modal popups */
+.modal {
+    position: absolute;
+    left: 0;
+    top:  0;
+    width:  100%;
+    height: 100%;
+    background: hsla(0, 0%, 0%, 60%);
+}
+.modal > div {
+    position: absolute;
+    top:  15%;
+    left: 50%;
+    transform: translate(-50%, 0%);
+}
+
+/* Dialogs */
+.dialog {
+    border: 1px solid hsl(0, 0%, 30%);
+    background: hsl(0, 0%, 10%);
+    color: white;
+    padding: 20px;
+    display: flex;
+    flex-direction: column;
+    min-width: 200px;
+    max-width: 400px;
+    white-space: pre-wrap;
+    max-height: 70%;
+    overflow-y: auto;
+}
+.dialog.wide {
+    width: 80%;
+    max-width: 1200px;
+}
+.dialog > .buttons {
+    display: flex;
+    justify-content: space-around;
+}
+.dialog .filedrop {
+    margin: 1em 0 1em 0;
+    padding: 1em;
+    border: 2px solid black;
+    background-color:  hsl(0, 0%, 50%);
+}
+.dialog .filelist {
+    display: flex;
+    flex-flow: row wrap;
+    list-style: none;
+    margin: 0;
+    padding: 0;
+}
+.dialog .filelist li {
+    padding: 0.2em 0.5em 0.2em 0.5em;
+    break-inside: avoid;
+}
+
+/* Mnemonics */
+.label > u {
+    position: relative;
+    top: 0px;
+    text-decoration: none;
+}
+body.mnemonic .label > u {
+    border-bottom: 1px solid;
+}
+
+/* Canvases */
+canvas {
+    border: 0px none;
+    background-color: black;
+}
+
+#container {
+    display: flex;
+    overflow: hidden;
+}
+/* FIXME(emscripten): this should be dynamically adjustable, not hardcoded in CSS */
+#container0 {
+    flex-basis: 80%;
+    height: 100%;
+    position:  relative;
+    overflow: hidden;
+}
+
+#container1parent {
+    flex-basis: 20%;
+    height: 100%;
+    position:  relative;
+    overflow: hidden;
+    min-width: 410px;
+
+    display: grid;
+    grid-template-columns: auto 19px;
+    grid-template-rows: 100%;
+}
+
+#container1 {
+    height: 100%;
+}
+
+#canvas1scrollbarbox {
+    /* 19px is a magic number for scrollbar width (Yes, this is platform-dependent value but looks almost working.) */
+    width: 19px;
+    min-width: 19px;
+    height: 100%;
+    overflow-x: hidden;
+    overflow-y: scroll;
+
+    background-color: lightgray;
+    -webkit-overflow-scrolling: auto;
+}
+
+#canvas1scrollbar {
+    /* 0px will disable the scrollbar by browser. */
+    width: 1px;
+    /* Disable scrollbar as default. This value will be overwritten by program. */
+    height: 100%;
+}
+
+#view_separator {
+    width: 4px;
+    background: hsl(0, 0%, 20%);
+}

src/platform/html/solvespaceui.js

@@ -0,0 +1,813 @@
+function isModal() {
+    var hasModal = !!document.querySelector('.modal');
+    var hasMenuBar = !!document.querySelector('.menubar .selected');
+    var hasPopupMenu = !!document.querySelector('.menu.popup');
+    return hasModal || hasMenuBar || hasPopupMenu;
+}
+
+/* String helpers */
+
+/** 
+ * @param {string} s - original string
+ * @param {number} digits - char length of generating string
+ * @param {string} ch - string to be used for padding
+ * @return {string} generated string ($digits chars length) or $s
+ */
+function stringPadLeft(s, digits, ch) {
+    if (s.length > digits) {
+        return s;
+    }
+    for (let i = s.length; i < digits; i++) {
+        s = ch + s;
+    }
+    return s;
+}
+
+/** Generate a string expression of now
+ * @return {string} like a "2022_08_31_2245" string (for 2022-08-31 22:45; local time)
+ */
+function GetCurrentDateTimeString() {
+    const now = new Date();
+    const padLeft2 = (num) => { return stringPadLeft(num.toString(), 2, '0') };
+    return (`${now.getFullYear()}_${padLeft2(now.getMonth()+1)}_${padLeft2(now.getDate())}` +
+            `_` + `${padLeft2(now.getHours())}${padLeft2(now.getMinutes())}`);
+}
+
+/* CSS helpers */
+function hasClass(element, className) {
+    return element.classList.contains(className);
+}
+function addClass(element, className) {
+    element.classList.add(className);
+}
+function removeClass(element, className) {
+    element.classList.remove(className);
+}
+function removeClassFromAllChildren(element, className) {
+    element.querySelectorAll('.' + className).forEach(function(element) {
+        removeClass(element, className);
+    })
+}
+
+/* Mnemonic helpers */
+function setLabelWithMnemonic(element, labelText) {
+    var label = document.createElement('span');
+    addClass(label, 'label');
+    element.appendChild(label);
+
+    var matches = labelText.match('(.*?)&(.)(.*)?');
+    if(matches) {
+        label.appendChild(document.createTextNode(matches[1]));
+        if(matches[2]) {
+            var mnemonic = document.createElement('u');
+            mnemonic.innerText = matches[2];
+            label.appendChild(mnemonic);
+            addClass(element, 'mnemonic-Key' + matches[2].toUpperCase());
+        }
+        if(matches[3]) {
+            label.appendChild(document.createTextNode(matches[3]));
+        }
+    } else {
+        label.appendChild(document.createTextNode(labelText))
+    }
+}
+
+/** Touchevent helper
+ * @param {TouchEvent} event
+ * @return {boolean} true if same element is target of touchstart and touchend
+ */
+function isSameElementOnTouchstartAndTouchend(event) {
+    const elementOnTouchStart = event.target;
+    const elementOnTouchEnd = document.elementFromPoint(event.changedTouches[0].clientX, event.changedTouches[0].clientY);
+    return elementOnTouchStart == elementOnTouchEnd;
+}
+
+/* Button helpers */
+function isButton(element) {
+    return hasClass(element, 'button');
+}
+
+/* Button DOM traversal helpers */
+function getButton(element) {
+    if(!element) return;
+    if(element.tagName == 'U') {
+        element = element.parentElement;
+    }
+    if(hasClass(element, 'label')) {
+        return getButton(element.parentElement);
+    } else if(isButton(element)) {
+        return element;
+    }
+}
+
+/* Button behavior */
+window.addEventListener('click', function(event) {
+    var button = getButton(event.target);
+    if(button) {
+        button.dispatchEvent(new Event('trigger'));
+    }
+});
+window.addEventListener("touchend", (event) => {
+    if (!isSameElementOnTouchstartAndTouchend(event)) {
+        return;
+    }
+    const button = getButton(event.target);
+    if (button) {
+        button.dispatchEvent(new Event('trigger'));
+    }
+});
+
+window.addEventListener('keydown', function(event) {
+    var selected = document.querySelector('.button.selected');
+    if(!selected) return;
+
+    var outSelected, newSelected;
+    if(event.key == 'ArrowRight') {
+        outSelected = selected;
+        newSelected = selected.nextElementSibling;
+        if(!newSelected) {
+            newSelected = outSelected.parentElement.firstElementChild;
+        }
+    } else if(event.key == 'ArrowLeft') {
+        outSelected = selected;
+        newSelected = selected.previousElementSibling;
+        if(!newSelected) {
+            newSelected = outSelected.parentElement.lastElementChild;
+        }
+    } else if(event.key == 'Enter') {
+        selected.dispatchEvent(new Event('trigger'));
+    } else if(event.key == 'Escape' && hasClass(selected, 'default')) {
+        selected.dispatchEvent(new Event('trigger'));
+    }
+
+    if(outSelected) removeClass(outSelected, 'selected');
+    if(newSelected) addClass(newSelected, 'selected');
+
+    event.stopPropagation();
+});
+
+/* Editor helpers */
+function isEditor(element) {
+    return hasClass(element, 'editor');
+}
+
+/* Editor DOM traversal helpers */
+function getEditor(element) {
+    if(!element) return;
+    if(isEditor(element)) {
+        return element;
+    }
+}
+
+/* Editor behavior */
+window.addEventListener('keydown', function(event) {
+    var editor = getEditor(event.target);
+    if(editor) {
+        if(event.key == 'Enter') {
+            editor.dispatchEvent(new Event('trigger'));
+        } else if(event.key == 'Escape') {
+            editor.style.display = 'none';
+        }
+        event.stopPropagation();
+    }
+}, {capture: true});
+
+/* Menu helpers */
+function isMenubar(element) {
+    return hasClass(element, 'menubar');
+}
+function isMenu(element) {
+    return hasClass(element, 'menu');
+}
+function isPopupMenu(element) {
+    return isMenu(element) && hasClass(element, 'popup')
+}
+function hasSubmenu(menuItem) {
+    return !!menuItem.querySelector('.menu');
+}
+
+/* Menu item helpers */
+function isMenuItemSelectable(menuItem) {
+    return !(hasClass(menuItem, 'disabled') || hasClass(menuItem, 'separator'));
+}
+function isMenuItemSelected(menuItem) {
+    return hasClass(menuItem, 'selected') || hasClass(menuItem, 'hover');
+}
+function deselectMenuItem(menuItem) {
+    removeClass(menuItem, 'selected');
+    removeClass(menuItem, 'hover');
+    removeClassFromAllChildren(menuItem, 'selected');
+    removeClassFromAllChildren(menuItem, 'hover');
+}
+function selectMenuItem(menuItem) {
+    var menu = menuItem.parentElement;
+    removeClassFromAllChildren(menu, 'selected');
+    removeClassFromAllChildren(menu, 'hover');
+    if(isMenubar(menu)) {
+        addClass(menuItem, 'selected');
+    } else {
+        addClass(menuItem, 'hover');
+    }
+}
+function triggerMenuItem(menuItem) {
+    selectMenuItem(menuItem);
+    if(hasSubmenu(menuItem)) {
+        selectMenuItem(menuItem.querySelector('li:first-child'));
+    } else {
+        var parent = menuItem.parentElement;
+        while(!isMenubar(parent) && !isPopupMenu(parent)) {
+            parent = parent.parentElement;
+        }
+        removeClassFromAllChildren(parent, 'selected');
+        removeClassFromAllChildren(parent, 'hover');
+        if(isPopupMenu(parent)) {
+            parent.remove();
+        }
+
+        menuItem.dispatchEvent(new Event('trigger'));
+    }
+}
+
+/* Menu DOM traversal helpers */
+function getMenuItem(element) {
+    if(!element) return;
+    if(element.tagName == 'U') {
+        element = element.parentElement;
+    }
+    if(hasClass(element, 'label')) {
+        return getMenuItem(element.parentElement);
+    } else if(element.tagName == 'LI' && isMenu(element.parentElement)) {
+        return element;
+    }
+}
+function getMenu(element) {
+    if(!element) return;
+    if(isMenu(element)) {
+        return element;
+    } else {
+        var menuItem = getMenuItem(element);
+        if(menuItem && isMenu(menuItem.parentElement)) {
+            return menuItem.parentElement;
+        }
+    }
+}
+
+/* Menu behavior */
+window.addEventListener('click', function(event) {
+    var menuItem = getMenuItem(event.target);
+    var menu = getMenu(menuItem);
+    if(menu && isMenubar(menu)) {
+        if(hasClass(menuItem, 'selected')) {
+            removeClass(menuItem, 'selected');
+        } else {
+            selectMenuItem(menuItem);
+        }
+        event.stopPropagation();
+    } else if(menu) {
+        if(!hasSubmenu(menuItem)) {
+            triggerMenuItem(menuItem);
+        }
+        event.stopPropagation();
+    } else {
+        document.querySelectorAll('.menu .selected, .menu .hover')
+                .forEach(function(menuItem) {
+            deselectMenuItem(menuItem);
+            event.stopPropagation();
+        });
+        document.querySelectorAll('.menu.popup')
+                .forEach(function(menu) {
+            menu.remove();
+        });
+    }
+});
+window.addEventListener("touchend", (event) => {
+    if (!isSameElementOnTouchstartAndTouchend(event)) {
+        return;
+    }
+    var menuItem = getMenuItem(event.target);
+    var menu = getMenu(menuItem);
+    if(menu && isMenubar(menu)) {
+        if(hasClass(menuItem, 'selected')) {
+            removeClass(menuItem, 'selected');
+        } else {
+            selectMenuItem(menuItem);
+        }
+        event.stopPropagation();
+        event.preventDefault();
+    } else if(menu) {
+        if(!hasSubmenu(menuItem)) {
+            triggerMenuItem(menuItem);
+        } else {
+            addClass(menuItem, "selected");
+            addClass(menuItem, "hover");
+        }
+        event.stopPropagation();
+    } else {
+        document.querySelectorAll('.menu .selected, .menu .hover')
+                .forEach(function(menuItem) {
+            deselectMenuItem(menuItem);
+            event.stopPropagation();
+        });
+        document.querySelectorAll('.menu.popup')
+                .forEach(function(menu) {
+            menu.remove();
+        });
+    }
+});
+window.addEventListener('mouseover', function(event) {
+    var menuItem = getMenuItem(event.target);
+    var menu = getMenu(menuItem);
+    if(menu) {
+        var selected = menu.querySelectorAll('.selected, .hover');
+        if(isMenubar(menu)) {
+            if(selected.length > 0) {
+                selected.forEach(function(menuItem) {
+                    if(selected != menuItem) {
+                        deselectMenuItem(menuItem);
+                    }
+                });
+                addClass(menuItem, 'selected');
+            }
+        } else {
+            if(isMenuItemSelectable(menuItem)) {
+                selectMenuItem(menuItem);
+            }
+        }
+    }
+});
+window.addEventListener('keydown', function(event) {
+    var allSelected = document.querySelectorAll('.menubar .selected, .menubar .hover,' +
+                                                '.menu.popup .selected, .menu.popup .hover');
+    if(allSelected.length == 0) return;
+
+    var selected = allSelected[allSelected.length - 1];
+    var outSelected, newSelected;
+    var isMenubarItem = isMenubar(getMenu(selected));
+
+    if(isMenubarItem && event.key == 'ArrowRight' ||
+            !isMenubarItem && event.key == 'ArrowDown') {
+        outSelected = selected;
+        newSelected = selected.nextElementSibling;
+        while(newSelected && !isMenuItemSelectable(newSelected)) {
+            newSelected = newSelected.nextElementSibling;
+        }
+        if(!newSelected) {
+            newSelected = outSelected.parentElement.firstElementChild;
+        }
+    } else if(isMenubarItem && event.key == 'ArrowLeft' ||
+                !isMenubarItem && event.key == 'ArrowUp') {
+        outSelected = selected;
+        newSelected = selected.previousElementSibling;
+        while(newSelected && !isMenuItemSelectable(newSelected)) {
+            newSelected = newSelected.previousElementSibling;
+        }
+        if(!newSelected) {
+            newSelected = outSelected.parentElement.lastElementChild;
+        }
+    } else if(!isMenubarItem && event.key == 'ArrowRight') {
+        if(hasSubmenu(selected)) {
+            selectMenuItem(selected.querySelector('li:first-child'));
+        } else {
+            outSelected = allSelected[0];
+            newSelected = outSelected.nextElementSibling;
+            if(!newSelected) {
+                newSelected = outSelected.parentElement.firstElementChild;
+            }
+        }
+    } else if(!isMenubarItem && event.key == 'ArrowLeft') {
+        if(allSelected.length > 2) {
+            outSelected = selected;
+        } else {
+            outSelected = allSelected[0];
+            newSelected = outSelected.previousElementSibling;
+            if(!newSelected) {
+                newSelected = outSelected.parentElement.lastElementChild;
+            }
+        }
+    } else if(isMenubarItem && event.key == 'ArrowDown') {
+        newSelected = selected.querySelector('li:first-child');
+    } else if(event.key == 'Enter') {
+        triggerMenuItem(selected);
+    } else if(event.key == 'Escape') {
+        outSelected = allSelected[0];
+    } else {
+        var withMnemonic = getMenu(selected).querySelector('.mnemonic-' + event.key);
+        if(withMnemonic) {
+            triggerMenuItem(withMnemonic);
+        }
+    }
+
+    if(outSelected) deselectMenuItem(outSelected);
+    if(newSelected) selectMenuItem(newSelected);
+
+    event.stopPropagation();
+});
+
+/* Mnemonic behavior */
+window.addEventListener('keydown', function(event) {
+    var withMnemonic;
+    if(event.altKey && event.key == 'Alt') {
+        addClass(document.body, 'mnemonic');
+    } else if(!isModal() && event.altKey && (withMnemonic =
+                document.querySelector('.menubar > .mnemonic-' + event.code))) {
+        triggerMenuItem(withMnemonic);
+        event.stopPropagation();
+    } else {
+        removeClass(document.body, 'mnemonic');
+    }
+});
+window.addEventListener('keyup', function(event) {
+    if(event.key == 'Alt') {
+       removeClass(document.body, 'mnemonic');
+    }
+});
+
+
+// FIXME(emscripten): Should be implemnted in guihtmlcpp ?
+class FileUploadHelper {
+    constructor() {
+        this.modalRoot = document.createElement("div");
+        addClass(this.modalRoot, "modal");
+        this.modalRoot.style.display = "none";
+        this.modalRoot.style.zIndex = 1000;
+        
+        this.dialogRoot = document.createElement("div");
+        addClass(this.dialogRoot, "dialog");
+        this.modalRoot.appendChild(this.dialogRoot);
+
+        this.messageHeader = document.createElement("strong");
+        this.dialogRoot.appendChild(this.messageHeader);
+
+        this.descriptionParagraph = document.createElement("p");
+        this.dialogRoot.appendChild(this.descriptionParagraph);
+
+        this.currentFileListHeader = document.createElement("p");
+        this.currentFileListHeader.textContent = "Current uploaded files:";
+        this.dialogRoot.appendChild(this.currentFileListHeader);
+
+        this.currentFileList = document.createElement("div");
+        this.dialogRoot.appendChild(this.currentFileList);
+
+        this.fileInputContainer = document.createElement("div");
+
+        this.fileInputElement = document.createElement("input");
+        this.fileInputElement.setAttribute("type", "file");
+        this.fileInputElement.addEventListener("change", (ev)=> this.onFileInputChanged(ev));
+        this.fileInputContainer.appendChild(this.fileInputElement);
+
+        this.dialogRoot.appendChild(this.fileInputContainer);
+
+        this.buttonHolder = document.createElement("div");
+        addClass(this.buttonHolder, "buttons");
+        this.dialogRoot.appendChild(this.buttonHolder);
+
+        this.AddButton("OK", 0, false);
+        this.AddButton("Cancel", 1, true);
+        
+        this.closeDialog();
+
+        document.querySelector("body").appendChild(this.modalRoot);
+
+        this.currentFilename = null;
+
+        // FIXME(emscripten): For debugging
+        this.title = "";
+        this.filename = "";
+        this.filters = "";
+    }
+
+    dispose() {
+        document.querySelector("body").removeChild(this.modalRoot);
+    }
+
+    AddButton(label, response, isDefault) {
+        // FIXME(emscripten): implement
+        const buttonElem = document.createElement("div");
+        addClass(buttonElem, "button");
+        setLabelWithMnemonic(buttonElem, label);
+        if (isDefault) {
+            addClass(buttonElem, "default");
+            addClass(buttonElem, "selected");
+        }
+        buttonElem.addEventListener("click", () => {
+            this.closeDialog();
+        });
+
+        this.buttonHolder.appendChild(buttonElem);
+    }
+
+    getFileEntries() {
+        const basePath = '/';
+        /** @type {Array<object} */
+        const nodes = FS.readdir(basePath);
+        const files = nodes.filter((nodename) => {
+            return FS.isFile(FS.lstat(basePath + nodename).mode);
+        }).map((filename) => {
+            return basePath + filename;
+        });
+        return files;
+    }
+
+    generateFileList() {
+        let filepaths = this.getFileEntries();
+        const listElem = document.createElement("ul");
+        for (let i = 0; i < filepaths.length; i++) {
+            const listitemElem = document.createElement("li");
+            const stat = FS.lstat(filepaths[i]);
+            const text = `"${filepaths[i]}" (${stat.size} bytes)`;
+            listitemElem.textContent = text;
+            listElem.appendChild(listitemElem);
+        }
+        return listElem;
+    }
+
+    updateFileList() {
+        this.currentFileList.innerHTML = "";
+        this.currentFileList.appendChild(this.generateFileList());
+    }
+
+    onFileInputChanged(ev) {
+        const selectedFiles = ev.target.files;
+        if (selectedFiles.length < 1) {
+            return;
+        }
+        const selectedFile = selectedFiles[0];
+        const selectedFilename = selectedFile.name;
+        this.filename = selectedFilename;
+        this.currentFilename = selectedFilename;
+
+        // Prepare FileReader
+        const fileReader = new FileReader();
+        const fileReaderReadAsArrayBufferPromise = new Promise((resolve, reject) => {
+            fileReader.addEventListener("load", (ev) => {
+                resolve(ev.target.result);
+            });
+            fileReader.addEventListener("abort", (err) => {
+                reject(err);
+            });
+            fileReader.readAsArrayBuffer(selectedFile);
+        });
+
+        fileReaderReadAsArrayBufferPromise
+            .then((arrayBuffer) => {
+                // Write selected file to FS
+                console.log(`Write uploaded file blob to filesystem. "${selectedFilename}" (${arrayBuffer.byteLength} bytes)`);
+                const u8array = new Uint8Array(arrayBuffer);
+                const fs = FS.open("/" + selectedFilename, "w");
+                FS.write(fs, u8array, 0, u8array.length, 0);
+                FS.close(fs);
+
+                // Update file list in dialog
+                this.updateFileList();
+            })
+            .catch((err) => {
+                console.error("Error while fileReader.readAsArrayBuffer():", err);
+            });
+    }
+
+    showDialog() {
+        this.updateFileList();
+
+        this.is_shown = true;
+        this.modalRoot.style.display = "block";
+    }
+
+    closeDialog() {
+        this.is_shown = false;
+        this.modalRoot.style.display = "none";
+    }
+};
+
+// FIXME(emscripten): Workaround
+function createFileUploadHelperInstance() {
+    return new FileUploadHelper();
+}
+
+// FIXME(emscripten): Should be implemnted in guihtmlcpp ?
+class FileDownloadHelper {
+    constructor() {
+        this.modalRoot = document.createElement("div");
+        addClass(this.modalRoot, "modal");
+        this.modalRoot.style.display = "none";
+        this.modalRoot.style.zIndex = 1000;
+        
+        this.dialogRoot = document.createElement("div");
+        addClass(this.dialogRoot, "dialog");
+        this.modalRoot.appendChild(this.dialogRoot);
+
+        this.messageHeader = document.createElement("strong");
+        this.dialogRoot.appendChild(this.messageHeader);
+
+        this.descriptionParagraph = document.createElement("p");
+        this.dialogRoot.appendChild(this.descriptionParagraph);
+
+        this.buttonHolder = document.createElement("div");
+        addClass(this.buttonHolder, "buttons");
+        this.dialogRoot.appendChild(this.buttonHolder);
+        
+        this.closeDialog();
+
+        document.querySelector("body").appendChild(this.modalRoot);
+    }
+
+    dispose() {
+        document.querySelector("body").removeChild(this.modalRoot);
+    }
+
+    AddButton(label, response, isDefault) {
+        // FIXME(emscripten): implement
+        const buttonElem = document.createElement("div");
+        addClass(buttonElem, "button");
+        setLabelWithMnemonic(buttonElem, label);
+        if (isDefault) {
+            addClass(buttonElem, "default");
+            addClass(buttonElem, "selected");
+        }
+        buttonElem.addEventListener("click", () => {
+            this.closeDialog();
+            this.dispose();
+        });
+
+        this.buttonHolder.appendChild(buttonElem);
+    }
+
+    createBlobURLFromArrayBuffer(arrayBuffer) {
+        const u8array = new Uint8Array(arrayBuffer);
+        let dataUrl = "data:application/octet-stream;base64,";
+        let binaryString = "";
+        for (let i = 0; i < u8array.length; i++) {
+            binaryString += String.fromCharCode(u8array[i]);
+        }
+        dataUrl += btoa(binaryString);
+
+        return dataUrl;
+    }
+
+    prepareFile(filename) {
+        this.messageHeader.textContent = "Your file ready";
+
+        const stat = FS.lstat(filename);
+        const filesize = stat.size;
+        const fs = FS.open(filename, "r");
+        const readbuffer = new Uint8Array(filesize);
+        FS.read(fs, readbuffer, 0, filesize, 0);
+        FS.close(fs);
+
+        const blobURL = this.createBlobURLFromArrayBuffer(readbuffer.buffer);
+
+        this.descriptionParagraph.innerHTML = "";
+        const linkElem = document.createElement("a");
+        //let downloadfilename = "solvespace_browser-";
+        //downloadfilename += `${GetCurrentDateTimeString()}.slvs`;
+        let downloadfilename = filename;
+        linkElem.setAttribute("download", downloadfilename);
+        linkElem.setAttribute("href", blobURL);
+        // WORKAROUND: FIXME(emscripten)
+        linkElem.style.color = "lightblue";
+        linkElem.textContent = downloadfilename;
+        this.descriptionParagraph.appendChild(linkElem);
+    }
+
+    showDialog() {
+        this.is_shown = true;
+        this.modalRoot.style.display = "block";
+    }
+
+    closeDialog() {
+        this.is_shown = false;
+        this.modalRoot.style.display = "none";
+    }
+};
+
+function saveFileDone(filename, isSaveAs, isAutosave) {
+    console.log(`saveFileDone(${filename}, ${isSaveAs}, ${isAutosave})`);
+    if (isAutosave) {
+        return;
+    }
+    const fileDownloadHelper = new FileDownloadHelper();
+    fileDownloadHelper.AddButton("OK", 0, true);
+    fileDownloadHelper.prepareFile(filename);
+    console.log(`Calling shoDialog()...`);
+    fileDownloadHelper.showDialog();
+    console.log(`shoDialog() finished.`);
+}
+
+
+class ScrollbarHelper {
+    /**
+     * @param {HTMLElement} elementquery CSS query string for the element that has scrollbar.
+     */
+    constructor(elementquery) {
+        this.target = document.querySelector(elementquery);
+        this.rangeMin = 0;
+        this.rangeMax = 0;
+        this.currentRatio = 0;
+
+        this.onScrollCallback = null;
+        this.onScrollCallbackTicking = false;
+        if (this.target) {
+            // console.log("addEventListner scroll");
+            this.target.parentElement.addEventListener('scroll', () => {
+                if (this.onScrollCallbackTicking) {
+                    return;
+                }
+                window.requestAnimationFrame(() => {
+                    if (this.onScrollCallback) {
+                        this.onScrollCallback();
+                    }
+                    this.onScrollCallbackTicking = false;
+                });
+                this.onScrollCallbackTicking = true;
+            });
+        }
+    }
+
+    /**
+     * 
+     * @param {number} ratio how long against to the viewport height (1.0 to exact same as viewport's height)
+     */
+    setScrollbarSize(ratio) {
+        // if (isNaN(ratio)) {
+        //     console.warn(`setScrollbarSize(): ratio is Nan = ${ratio}`);
+        // }
+        // if (ratio < 0 || ratio > 1) {
+        //     console.warn(`setScrollbarSize(): ratio is out of range 0-1 but ${ratio}`);
+        // }
+        // console.log(`ScrollbarHelper.setScrollbarSize(): ratio=${ratio}`);
+        this.target.style.height = `${100 * ratio}%`;
+    }
+
+    getScrollbarPosition() {
+        const scrollbarElem = this.target.parentElement;
+        const scrollTopMin = 0;
+        const scrollTopMax = scrollbarElem.scrollHeight - scrollbarElem.clientHeight;
+        const ratioOnScrollbar = (scrollbarElem.scrollTop - scrollTopMin) / (scrollTopMax - scrollTopMin);
+        this.currentRatio = (scrollbarElem.scrollTop - scrollTopMin) / (scrollTopMax - scrollTopMin);
+        let pos = this.currentRatio * (this.rangeMax - this.pageSize - this.rangeMin) + this.rangeMin;
+        // console.log(`ScrollbarHelper.getScrollbarPosition(): ratio=${ratioOnScrollbar}, pos=${pos}, scrollTop=${scrollbarElem.scrollTop}, scrollTopMin=${scrollTopMin}, scrollTopMax=${scrollTopMax}, rangeMin=${this.rangeMin}, rangeMax=${this.rangeMax}, pageSize=${this.pageSize}`);
+        if (isNaN(pos)) {
+            return 0;
+        } else {
+            return pos;
+        }
+    }
+
+    /**
+     * @param {number} value in range of rangeMin and rangeMax
+     */
+    setScrollbarPosition(position) {
+        const positionMin = this.rangeMin;
+        const positionMax = this.rangeMax - this.pageSize;
+        const currentPositionRatio = (position - positionMin) / (positionMax - positionMin);
+
+        const scrollbarElement = this.target.parentElement;
+        const scrollTopMin = 0;
+        const scrollTopMax = scrollbarElement.scrollHeight - scrollbarElement.clientHeight;
+        const scrollWidth = scrollTopMax - scrollTopMin;
+        const newScrollTop = currentPositionRatio * scrollWidth;
+        scrollbarElement.scrollTop = currentPositionRatio * scrollWidth;
+
+        // console.log(`ScrollbarHelper.setScrollbarPosition(): pos=${position}, currentPositionRatio=${currentPositionRatio}, calculated scrollTop=${newScrollTop}`);
+
+        if (false) {
+        // const ratio = (position - this.rangeMin) * ((this.rangeMax - this.pageSize) - this.rangeMin);
+
+        const scrollTopMin = 0;
+        const scrollTopMax = this.target.scrollHeight - this.target.clientHeight;
+        const scrollWidth = scrollTopMax - scrollTopMin;
+        const newScrollTop = ratio * scrollWidth;
+        // this.target.parentElement.scrollTop = ratio * scrollWidth;
+        this.target.scrollTop = ratio * scrollWidth;
+
+        console.log(`ScrollbarHelper.setScrollbarPosition(): pos=${position}, ratio=${ratio}, calculated scrollTop=${newScrollTop}`);
+        }
+    }
+
+    /** */
+    setRange(min, max, pageSize) {
+        this.rangeMin = min;
+        this.rangeMax = max;
+        this.currentRatio = 0;
+
+        this.setPageSize(pageSize);
+    }
+
+    setPageSize(pageSize) {
+        if (this.rangeMin == this.rangeMax) {
+            // console.log(`ScrollbarHelper::setPageSize(): size=${size}, but rangeMin == rangeMax`);
+            return;
+        }
+        this.pageSize = pageSize;
+        const ratio = (this.rangeMax - this.rangeMin) / this.pageSize;
+        // console.log(`ScrollbarHelper::setPageSize(): pageSize=${pageSize}, ratio=${ratio}`);
+        this.setScrollbarSize(ratio);
+    }
+
+    setScrollbarEnabled(enabled) {
+        if (!enabled) {
+            this.target.style.height = "100%";
+        }
+    }
+};
+
+window.ScrollbarHelper = ScrollbarHelper;

src/platform/platform.cpp

@@ -516,6 +516,12 @@ static Platform::Path ResourcePath(const std::string &name) {
     return path;
 }
 
+#elif defined(__EMSCRIPTEN__)
+
+static Platform::Path ResourcePath(const std::string &name) {
+    return Path::From("res/" + name);
+}
+
 #elif !defined(WIN32)
 
 #    if defined(__linux__)

src/render/gl3shader.h

@@ -6,7 +6,7 @@
 #ifndef SOLVESPACE_GL3SHADER_H
 #define SOLVESPACE_GL3SHADER_H
 
-#if defined(WIN32)
+#if defined(WIN32) || defined(__EMSCRIPTEN__)
 #   define GL_APICALL /*static linkage*/
 #   define GL_GLEXT_PROTOTYPES
 #   include <GLES2/gl2.h>

src/solvespace.cpp

@@ -125,12 +125,8 @@ void SolveSpaceUI::Init() {
         SetLocale(locale);
     }
 
-    generateAllTimer = Platform::CreateTimer();
+    refreshTimer = Platform::CreateTimer();
-    generateAllTimer->onTimeout = std::bind(&SolveSpaceUI::GenerateAll, &SS, Generate::DIRTY,
+    refreshTimer->onTimeout = std::bind(&SolveSpaceUI::Refresh, &SS);
-                                            /*andFindFree=*/false, /*genForBBox=*/false);
-
-    showTWTimer = Platform::CreateTimer();
-    showTWTimer->onTimeout = std::bind(&TextWindow::Show, &TW);
 
     autosaveTimer = Platform::CreateTimer();
     autosaveTimer->onTimeout = std::bind(&SolveSpaceUI::Autosave, &SS);
@@ -302,12 +298,26 @@ void SolveSpaceUI::Exit() {
     Platform::ExitGui();
 }
 
+void SolveSpaceUI::Refresh() {
+    // generateAll must happen bfore updating displays
+    if(scheduledGenerateAll) {
+        GenerateAll(Generate::DIRTY, /*andFindFree=*/false, /*genForBBox=*/false);
+        scheduledGenerateAll = false;
+    }
+    if(scheduledShowTW) {
+        TW.Show();
+        scheduledShowTW = false;
+    }
+}
+
 void SolveSpaceUI::ScheduleGenerateAll() {
-    generateAllTimer->RunAfterProcessingEvents();
+    scheduledGenerateAll = true;
+    refreshTimer->RunAfterProcessingEvents();
 }
 
 void SolveSpaceUI::ScheduleShowTW() {
-    showTWTimer->RunAfterProcessingEvents();
+    scheduledShowTW = true;
+    refreshTimer->RunAfterProcessingEvents();
 }
 
 void SolveSpaceUI::ScheduleAutosave() {
@@ -550,12 +560,18 @@ bool SolveSpaceUI::GetFilenameAndSave(bool saveAs) {
 
     if(saveAs || saveFile.IsEmpty()) {
         Platform::FileDialogRef dialog = Platform::CreateSaveFileDialog(GW.window);
+        // FIXME(emscripten):
+        dbp("Calling AddFilter()...");
         dialog->AddFilter(C_("file-type", "SolveSpace models"), { SKETCH_EXT });
+        dbp("Calling ThawChoices()...");
         dialog->ThawChoices(settings, "Sketch");
         if(!newSaveFile.IsEmpty()) {
+            dbp("Calling SetFilename()...");
             dialog->SetFilename(newSaveFile);
         }
+        dbp("Calling RunModal()...");
         if(dialog->RunModal()) {
+            dbp("Calling FreezeChoices()...");
             dialog->FreezeChoices(settings, "Sketch");
             newSaveFile = dialog->GetFilename();
         } else {
@@ -568,6 +584,9 @@ bool SolveSpaceUI::GetFilenameAndSave(bool saveAs) {
         RemoveAutosave();
         saveFile = newSaveFile;
         unsaved = false;
+        if (this->OnSaveFinished) {
+            this->OnSaveFinished(newSaveFile, saveAs, false);
+        }
         return true;
     } else {
         return false;
@@ -579,7 +598,11 @@ void SolveSpaceUI::Autosave()
     ScheduleAutosave();
 
     if(!saveFile.IsEmpty() && unsaved) {
-        SaveToFile(saveFile.WithExtension(BACKUP_EXT));
+        Platform::Path saveFileName = saveFile.WithExtension(BACKUP_EXT);
+        SaveToFile(saveFileName);
+        if (this->OnSaveFinished) {
+            this->OnSaveFinished(saveFileName, false, true);
+        }
     }
 }
 
@@ -679,6 +702,9 @@ void SolveSpaceUI::MenuFile(Command id) {
             if(dialog->RunModal()) {
                 dialog->FreezeChoices(settings, "ExportImage");
                 SS.ExportAsPngTo(dialog->GetFilename());
+                if (SS.OnSaveFinished) {
+                    SS.OnSaveFinished(dialog->GetFilename(), false, false);
+                }
             }
             break;
         }
@@ -704,6 +730,9 @@ void SolveSpaceUI::MenuFile(Command id) {
             }
 
             SS.ExportViewOrWireframeTo(dialog->GetFilename(), /*exportWireframe=*/false);
+            if (SS.OnSaveFinished) {
+                SS.OnSaveFinished(dialog->GetFilename(), false, false);
+            }
             break;
         }
 
@@ -716,6 +745,9 @@ void SolveSpaceUI::MenuFile(Command id) {
             dialog->FreezeChoices(settings, "ExportWireframe");
 
             SS.ExportViewOrWireframeTo(dialog->GetFilename(), /*exportWireframe*/true);
+            if (SS.OnSaveFinished) {
+                SS.OnSaveFinished(dialog->GetFilename(), false, false);
+            }
             break;
         }
 
@@ -728,6 +760,9 @@ void SolveSpaceUI::MenuFile(Command id) {
             dialog->FreezeChoices(settings, "ExportSection");
 
             SS.ExportSectionTo(dialog->GetFilename());
+            if (SS.OnSaveFinished) {
+                SS.OnSaveFinished(dialog->GetFilename(), false, false);
+            }
             break;
         }
 
@@ -740,6 +775,10 @@ void SolveSpaceUI::MenuFile(Command id) {
             dialog->FreezeChoices(settings, "ExportMesh");
 
             SS.ExportMeshTo(dialog->GetFilename());
+            if (SS.OnSaveFinished) {
+                SS.OnSaveFinished(dialog->GetFilename(), false, false);
+            }
+
             break;
         }
 
@@ -753,6 +792,9 @@ void SolveSpaceUI::MenuFile(Command id) {
 
             StepFileWriter sfw = {};
             sfw.ExportSurfacesTo(dialog->GetFilename());
+            if (SS.OnSaveFinished) {
+                SS.OnSaveFinished(dialog->GetFilename(), false, false);
+            }
             break;
         }
 

src/solvespace.h

@@ -683,6 +683,7 @@ public:
     void NewFile();
     bool SaveToFile(const Platform::Path &filename);
     bool LoadAutosaveFor(const Platform::Path &filename);
+    std::function<void(const Platform::Path &filename, bool is_saveAs, bool is_autosave)> OnSaveFinished;
     bool LoadFromFile(const Platform::Path &filename, bool canCancel = false);
     void UpgradeLegacyData();
     bool LoadEntitiesFromFile(const Platform::Path &filename, EntityList *le,
@@ -793,9 +794,11 @@ public:
     // the sketch!
     bool allConsistent;
 
-    Platform::TimerRef showTWTimer;
+    bool scheduledGenerateAll;
-    Platform::TimerRef generateAllTimer;
+    bool scheduledShowTW;
+    Platform::TimerRef refreshTimer;
     Platform::TimerRef autosaveTimer;
+    void Refresh();
     void ScheduleShowTW();
     void ScheduleGenerateAll();
     void ScheduleAutosave();

src/srf/shell.cpp

@@ -0,0 +1,614 @@
+//-----------------------------------------------------------------------------
+// Anything involving NURBS shells (i.e., shells); except
+// for the real math, which is in ratpoly.cpp.
+//
+// Copyright 2008-2013 Jonathan Westhues.
+//-----------------------------------------------------------------------------
+#include "../solvespace.h"
+
+typedef struct {
+    hSCurve     hc;
+    hSSurface   hs;
+} TrimLine;
+
+
+void SShell::MakeFromExtrusionOf(SBezierLoopSet *sbls, Vector t0, Vector t1, RgbaColor color)
+{
+    // Make the extrusion direction consistent with respect to the normal
+    // of the sketch we're extruding.
+    if((t0.Minus(t1)).Dot(sbls->normal) < 0) {
+        swap(t0, t1);
+    }
+
+    // Define a coordinate system to contain the original sketch, and get
+    // a bounding box in that csys
+    Vector n = sbls->normal.ScaledBy(-1);
+    Vector u = n.Normal(0), v = n.Normal(1);
+    Vector orig = sbls->point;
+    double umax = VERY_NEGATIVE, umin = VERY_POSITIVE;
+    sbls->GetBoundingProjd(u, orig, &umin, &umax);
+    double vmax = VERY_NEGATIVE, vmin = VERY_POSITIVE;
+    sbls->GetBoundingProjd(v, orig, &vmin, &vmax);
+    // and now fix things up so that all u and v lie between 0 and 1
+    orig = orig.Plus(u.ScaledBy(umin));
+    orig = orig.Plus(v.ScaledBy(vmin));
+    u = u.ScaledBy(umax - umin);
+    v = v.ScaledBy(vmax - vmin);
+
+    // So we can now generate the top and bottom surfaces of the extrusion,
+    // planes within a translated (and maybe mirrored) version of that csys.
+    SSurface s0, s1;
+    s0 = SSurface::FromPlane(orig.Plus(t0), u, v);
+    s0.color = color;
+    s1 = SSurface::FromPlane(orig.Plus(t1).Plus(u), u.ScaledBy(-1), v);
+    s1.color = color;
+    hSSurface hs0 = surface.AddAndAssignId(&s0),
+              hs1 = surface.AddAndAssignId(&s1);
+
+    // Now go through the input curves. For each one, generate its surface
+    // of extrusion, its two translated trim curves, and one trim line. We
+    // go through by loops so that we can assign the lines correctly.
+    SBezierLoop *sbl;
+    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
+        SBezier *sb;
+        List<TrimLine> trimLines = {};
+
+        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
+            // Generate the surface of extrusion of this curve, and add
+            // it to the list
+            SSurface ss = SSurface::FromExtrusionOf(sb, t0, t1);
+            ss.color = color;
+            hSSurface hsext = surface.AddAndAssignId(&ss);
+
+            // Translate the curve by t0 and t1 to produce two trim curves
+            SCurve sc = {};
+            sc.isExact = true;
+            sc.exact = sb->TransformedBy(t0, Quaternion::IDENTITY, 1.0);
+            (sc.exact).MakePwlInto(&(sc.pts));
+            sc.surfA = hs0;
+            sc.surfB = hsext;
+            hSCurve hc0 = curve.AddAndAssignId(&sc);
+
+            sc = {};
+            sc.isExact = true;
+            sc.exact = sb->TransformedBy(t1, Quaternion::IDENTITY, 1.0);
+            (sc.exact).MakePwlInto(&(sc.pts));
+            sc.surfA = hs1;
+            sc.surfB = hsext;
+            hSCurve hc1 = curve.AddAndAssignId(&sc);
+
+            STrimBy stb0, stb1;
+            // The translated curves trim the flat top and bottom surfaces.
+            stb0 = STrimBy::EntireCurve(this, hc0, /*backwards=*/false);
+            stb1 = STrimBy::EntireCurve(this, hc1, /*backwards=*/true);
+            (surface.FindById(hs0))->trim.Add(&stb0);
+            (surface.FindById(hs1))->trim.Add(&stb1);
+
+            // The translated curves also trim the surface of extrusion.
+            stb0 = STrimBy::EntireCurve(this, hc0, /*backwards=*/true);
+            stb1 = STrimBy::EntireCurve(this, hc1, /*backwards=*/false);
+            (surface.FindById(hsext))->trim.Add(&stb0);
+            (surface.FindById(hsext))->trim.Add(&stb1);
+
+            // And form the trim line
+            Vector pt = sb->Finish();
+            sc = {};
+            sc.isExact = true;
+            sc.exact = SBezier::From(pt.Plus(t0), pt.Plus(t1));
+            (sc.exact).MakePwlInto(&(sc.pts));
+            hSCurve hl = curve.AddAndAssignId(&sc);
+            // save this for later
+            TrimLine tl;
+            tl.hc = hl;
+            tl.hs = hsext;
+            trimLines.Add(&tl);
+        }
+
+        int i;
+        for(i = 0; i < trimLines.n; i++) {
+            TrimLine *tl = &(trimLines[i]);
+            SSurface *ss = surface.FindById(tl->hs);
+
+            TrimLine *tlp = &(trimLines[WRAP(i-1, trimLines.n)]);
+
+            STrimBy stb;
+            stb = STrimBy::EntireCurve(this, tl->hc, /*backwards=*/true);
+            ss->trim.Add(&stb);
+            stb = STrimBy::EntireCurve(this, tlp->hc, /*backwards=*/false);
+            ss->trim.Add(&stb);
+
+            (curve.FindById(tl->hc))->surfA = ss->h;
+            (curve.FindById(tlp->hc))->surfB = ss->h;
+        }
+        trimLines.Clear();
+    }
+}
+
+bool SShell::CheckNormalAxisRelationship(SBezierLoopSet *sbls, Vector pt, Vector axis, double da, double dx)
+// Check that the direction of revolution/extrusion ends up parallel to the normal of
+// the sketch, on the side of the axis where the sketch is.
+{
+    SBezierLoop *sbl;
+    Vector pto;
+    double md = VERY_NEGATIVE;
+    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
+        SBezier *sb;
+        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
+            // Choose the point farthest from the axis; we'll get garbage
+            // if we choose a point that lies on the axis, for example.
+            // (And our surface will be self-intersecting if the sketch
+            // spans the axis, so don't worry about that.)
+            for(int i = 0; i <= sb->deg; i++) {
+                Vector p = sb->ctrl[i];
+                double d = p.DistanceToLine(pt, axis);
+                if(d > md) {
+                    md  = d;
+                    pto = p;
+                }
+            }
+        }
+    }
+    Vector ptc = pto.ClosestPointOnLine(pt, axis),
+           up = axis.Cross(pto.Minus(ptc)).ScaledBy(da),
+           vp = up.Plus(axis.ScaledBy(dx));
+   
+    return (vp.Dot(sbls->normal) > 0);
+}
+
+// sketch must not contain the axis of revolution as a non-construction line for helix
+void SShell::MakeFromHelicalRevolutionOf(SBezierLoopSet *sbls, Vector pt, Vector axis,
+                                         RgbaColor color, Group *group, double angles,
+                                         double anglef, double dists, double distf) {
+    int i0 = surface.n; // number of pre-existing surfaces
+    SBezierLoop *sbl;
+    // for testing - hard code the axial distance, and number of sections.
+    // distance will need to be parameters in the future.
+    double dist  = distf - dists;
+    int sections = (int)(fabs(anglef - angles) / (PI / 2) + 1);
+    double wedge = (anglef - angles) / sections;
+    int startMapping = Group::REMAP_LATHE_START, endMapping = Group::REMAP_LATHE_END;
+
+    if(CheckNormalAxisRelationship(sbls, pt, axis, anglef-angles, distf-dists)) {
+        swap(angles, anglef);
+        swap(dists, distf);
+        dist  = -dist;
+        wedge = -wedge;
+        swap(startMapping, endMapping);
+    }
+
+    // Define a coordinate system to contain the original sketch, and get
+    // a bounding box in that csys
+    Vector n = sbls->normal.ScaledBy(-1);
+    Vector u = n.Normal(0), v = n.Normal(1);
+    Vector orig = sbls->point;
+    double umax = VERY_NEGATIVE, umin = VERY_POSITIVE;
+    sbls->GetBoundingProjd(u, orig, &umin, &umax);
+    double vmax = VERY_NEGATIVE, vmin = VERY_POSITIVE;
+    sbls->GetBoundingProjd(v, orig, &vmin, &vmax);
+    // and now fix things up so that all u and v lie between 0 and 1
+    orig = orig.Plus(u.ScaledBy(umin));
+    orig = orig.Plus(v.ScaledBy(vmin));
+    u    = u.ScaledBy(umax - umin);
+    v    = v.ScaledBy(vmax - vmin);
+
+    // So we can now generate the end caps of the extrusion within
+    // a translated and rotated (and maybe mirrored) version of that csys.
+    SSurface s0, s1;
+    s0 = SSurface::FromPlane(orig.RotatedAbout(pt, axis, angles).Plus(axis.ScaledBy(dists)),
+                             u.RotatedAbout(axis, angles), v.RotatedAbout(axis, angles));
+    s0.color = color;
+
+    hEntity face0 = group->Remap(Entity::NO_ENTITY, startMapping);
+    s0.face = face0.v;
+
+    s1 = SSurface::FromPlane(
+        orig.Plus(u).RotatedAbout(pt, axis, anglef).Plus(axis.ScaledBy(distf)),
+        u.ScaledBy(-1).RotatedAbout(axis, anglef), v.RotatedAbout(axis, anglef));
+    s1.color = color;
+
+    hEntity face1 = group->Remap(Entity::NO_ENTITY, endMapping);
+    s1.face = face1.v;
+
+    hSSurface hs0 = surface.AddAndAssignId(&s0);
+    hSSurface hs1 = surface.AddAndAssignId(&s1);
+
+    // Now we actually build and trim the swept surfaces. One loop at a time.
+    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
+        int i, j;
+        SBezier *sb;
+        List<std::vector<hSSurface>> hsl = {};
+
+        // This is where all the NURBS are created and Remapped to the generating curve
+        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
+            std::vector<hSSurface> revs(sections);
+            for(j = 0; j < sections; j++) {
+                if((dist == 0) && sb->deg == 1 &&
+                   (sb->ctrl[0]).DistanceToLine(pt, axis) < LENGTH_EPS &&
+                   (sb->ctrl[1]).DistanceToLine(pt, axis) < LENGTH_EPS) {
+                    // This is a line on the axis of revolution; it does
+                    // not contribute a surface.
+                    revs[j].v = 0;
+                } else {
+                    SSurface ss = SSurface::FromRevolutionOf(
+                        sb, pt, axis, angles + (wedge)*j, angles + (wedge) * (j + 1),
+                        dists + j * dist / sections, dists + (j + 1) * dist / sections);
+                    ss.color = color;
+                    if(sb->entity != 0) {
+                        hEntity he;
+                        he.v          = sb->entity;
+                        hEntity hface = group->Remap(he, Group::REMAP_LINE_TO_FACE);
+                        if(SK.entity.FindByIdNoOops(hface) != NULL) {
+                            ss.face = hface.v;
+                        }
+                    }
+                    revs[j] = surface.AddAndAssignId(&ss);
+                }
+            }
+            hsl.Add(&revs);
+        }
+        // Still the same loop. Need to create trim curves
+        for(i = 0; i < sbl->l.n; i++) {
+            std::vector<hSSurface> revs = hsl[i], revsp = hsl[WRAP(i - 1, sbl->l.n)];
+
+            sb = &(sbl->l[i]);
+
+            // we will need the grid t-values for this entire row of surfaces
+            List<double> t_values;
+            t_values = {};
+            if (revs[0].v) { 
+                double ps = 0.0;
+                t_values.Add(&ps);
+                (surface.FindById(revs[0]))->MakeTriangulationGridInto(
+                        &t_values, 0.0, 1.0, true, 0);
+            }
+            // we generate one more curve than we did surfaces
+            for(j = 0; j <= sections; j++) {
+                SCurve sc;
+                Quaternion qs = Quaternion::From(axis, angles + wedge * j);
+                // we want Q*(x - p) + p = Q*x + (p - Q*p)
+                Vector ts =
+                    pt.Minus(qs.Rotate(pt)).Plus(axis.ScaledBy(dists + j * dist / sections));
+
+                // If this input curve generated a surface, then trim that
+                // surface with the rotated version of the input curve.
+                if(revs[0].v) { // not d[j] because crash on j==sections
+                    sc         = {};
+                    sc.isExact = true;
+                    sc.exact   = sb->TransformedBy(ts, qs, 1.0);
+                    // make the PWL for the curve based on t value list
+                    for(int x = 0; x < t_values.n; x++) {
+                        SCurvePt scpt;
+                        scpt.tag    = 0;
+                        scpt.p      = sc.exact.PointAt(t_values[x]);
+                        scpt.vertex = (x == 0) || (x == (t_values.n - 1));
+                        sc.pts.Add(&scpt);
+                    }
+
+                    // the surfaces already exists so trim with this curve
+                    if(j < sections) {
+                        sc.surfA = revs[j];
+                    } else {
+                        sc.surfA = hs1; // end cap
+                    }
+
+                    if(j > 0) {
+                        sc.surfB = revs[j - 1];
+                    } else {
+                        sc.surfB = hs0; // staring cap
+                    }
+
+                    hSCurve hcb = curve.AddAndAssignId(&sc);
+
+                    STrimBy stb;
+                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/true);
+                    (surface.FindById(sc.surfA))->trim.Add(&stb);
+                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/false);
+                    (surface.FindById(sc.surfB))->trim.Add(&stb);
+                } else if(j == 0) { // curve was on the rotation axis and is shared by the end caps.
+                    sc         = {};
+                    sc.isExact = true;
+                    sc.exact   = sb->TransformedBy(ts, qs, 1.0);
+                    (sc.exact).MakePwlInto(&(sc.pts));
+                    sc.surfA    = hs1; // end cap
+                    sc.surfB    = hs0; // staring cap
+                    hSCurve hcb = curve.AddAndAssignId(&sc);
+
+                    STrimBy stb;
+                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/true);
+                    (surface.FindById(sc.surfA))->trim.Add(&stb);
+                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/false);
+                    (surface.FindById(sc.surfB))->trim.Add(&stb);
+                }
+
+                // And if this input curve and the one after it both generated
+                // surfaces, then trim both of those by the appropriate
+                // curve based on the control points.
+                if((j < sections) && revs[j].v && revsp[j].v) {
+                    SSurface *ss = surface.FindById(revs[j]);
+
+                    sc         = {};
+                    sc.isExact = true;
+                    sc.exact   = SBezier::From(ss->ctrl[0][0], ss->ctrl[0][1], ss->ctrl[0][2]);
+                    sc.exact.weight[1] = ss->weight[0][1];
+                    double max_dt = 0.5;
+                    if (sc.exact.deg > 1) max_dt = 0.125;
+                    (sc.exact).MakePwlInto(&(sc.pts), 0.0, max_dt);
+                    sc.surfA = revs[j];
+                    sc.surfB = revsp[j];
+
+                    hSCurve hcc = curve.AddAndAssignId(&sc);
+
+                    STrimBy stb;
+                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/false);
+                    (surface.FindById(sc.surfA))->trim.Add(&stb);
+                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/true);
+                    (surface.FindById(sc.surfB))->trim.Add(&stb);
+                }
+            }
+            t_values.Clear();
+        }
+
+        hsl.Clear();
+    }
+
+    if(dist == 0) {
+        MakeFirstOrderRevolvedSurfaces(pt, axis, i0);
+    }
+}
+
+void SShell::MakeFromRevolutionOf(SBezierLoopSet *sbls, Vector pt, Vector axis, RgbaColor color,
+                                  Group *group) {
+    int i0 = surface.n; // number of pre-existing surfaces
+    SBezierLoop *sbl;
+
+    if(CheckNormalAxisRelationship(sbls, pt, axis, 1.0, 0.0)) {
+        axis = axis.ScaledBy(-1);
+    }
+
+    // Now we actually build and trim the surfaces.
+    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
+        int i, j;
+        SBezier *sb;
+        List<std::vector<hSSurface>> hsl = {};
+
+        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
+            std::vector<hSSurface> revs(4);
+            for(j = 0; j < 4; j++) {
+                if(sb->deg == 1 &&
+                    (sb->ctrl[0]).DistanceToLine(pt, axis) < LENGTH_EPS &&
+                    (sb->ctrl[1]).DistanceToLine(pt, axis) < LENGTH_EPS)
+                {
+                    // This is a line on the axis of revolution; it does
+                    // not contribute a surface.
+                    revs[j].v = 0;
+                } else {
+                    SSurface ss = SSurface::FromRevolutionOf(sb, pt, axis, (PI / 2) * j,
+                                                             (PI / 2) * (j + 1), 0.0, 0.0);
+                    ss.color = color;
+                    if(sb->entity != 0) {
+                        hEntity he;
+                        he.v = sb->entity;
+                        hEntity hface = group->Remap(he, Group::REMAP_LINE_TO_FACE);
+                        if(SK.entity.FindByIdNoOops(hface) != NULL) {
+                            ss.face = hface.v;
+                        }
+                    }
+                    revs[j] = surface.AddAndAssignId(&ss);
+                }
+            }
+            hsl.Add(&revs);
+        }
+
+        for(i = 0; i < sbl->l.n; i++) {
+            std::vector<hSSurface> revs  = hsl[i],
+                     revsp = hsl[WRAP(i-1, sbl->l.n)];
+
+            sb   = &(sbl->l[i]);
+
+            for(j = 0; j < 4; j++) {
+                SCurve sc;
+                Quaternion qs = Quaternion::From(axis, (PI/2)*j);
+                // we want Q*(x - p) + p = Q*x + (p - Q*p)
+                Vector ts = pt.Minus(qs.Rotate(pt));
+
+                // If this input curve generate a surface, then trim that
+                // surface with the rotated version of the input curve.
+                if(revs[j].v) {
+                    sc = {};
+                    sc.isExact = true;
+                    sc.exact = sb->TransformedBy(ts, qs, 1.0);
+                    (sc.exact).MakePwlInto(&(sc.pts));
+                    sc.surfA = revs[j];
+                    sc.surfB = revs[WRAP(j-1, 4)];
+
+                    hSCurve hcb = curve.AddAndAssignId(&sc);
+
+                    STrimBy stb;
+                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/true);
+                    (surface.FindById(sc.surfA))->trim.Add(&stb);
+                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/false);
+                    (surface.FindById(sc.surfB))->trim.Add(&stb);
+                }
+
+                // And if this input curve and the one after it both generated
+                // surfaces, then trim both of those by the appropriate
+                // circle.
+                if(revs[j].v && revsp[j].v) {
+                    SSurface *ss = surface.FindById(revs[j]);
+
+                    sc = {};
+                    sc.isExact = true;
+                    sc.exact = SBezier::From(ss->ctrl[0][0],
+                                             ss->ctrl[0][1],
+                                             ss->ctrl[0][2]);
+                    sc.exact.weight[1] = ss->weight[0][1];
+                    (sc.exact).MakePwlInto(&(sc.pts));
+                    sc.surfA = revs[j];
+                    sc.surfB = revsp[j];
+
+                    hSCurve hcc = curve.AddAndAssignId(&sc);
+
+                    STrimBy stb;
+                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/false);
+                    (surface.FindById(sc.surfA))->trim.Add(&stb);
+                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/true);
+                    (surface.FindById(sc.surfB))->trim.Add(&stb);
+                }
+            }
+        }
+
+        hsl.Clear();
+    }
+
+    MakeFirstOrderRevolvedSurfaces(pt, axis, i0);
+}
+
+void SShell::MakeFirstOrderRevolvedSurfaces(Vector pt, Vector axis, int i0) {
+    int i;
+
+    for(i = i0; i < surface.n; i++) {
+        SSurface *srf = &(surface[i]);
+
+        // Revolution of a line; this is potentially a plane, which we can
+        // rewrite to have degree (1, 1).
+        if(srf->degm == 1 && srf->degn == 2) {
+            // close start, far start, far finish
+            Vector cs, fs, ff;
+            double d0, d1;
+            d0 = (srf->ctrl[0][0]).DistanceToLine(pt, axis);
+            d1 = (srf->ctrl[1][0]).DistanceToLine(pt, axis);
+
+            if(d0 > d1) {
+                cs = srf->ctrl[1][0];
+                fs = srf->ctrl[0][0];
+                ff = srf->ctrl[0][2];
+            } else {
+                cs = srf->ctrl[0][0];
+                fs = srf->ctrl[1][0];
+                ff = srf->ctrl[1][2];
+            }
+
+            // origin close, origin far
+            Vector oc = cs.ClosestPointOnLine(pt, axis),
+                   of = fs.ClosestPointOnLine(pt, axis);
+
+            if(oc.Equals(of)) {
+                // This is a plane, not a (non-degenerate) cone.
+                Vector oldn = srf->NormalAt(0.5, 0.5);
+
+                Vector u = fs.Minus(of), v;
+
+                v = (axis.Cross(u)).WithMagnitude(1);
+
+                double vm = (ff.Minus(of)).Dot(v);
+                v = v.ScaledBy(vm);
+
+                srf->degm = 1;
+                srf->degn = 1;
+                srf->ctrl[0][0] = of;
+                srf->ctrl[0][1] = of.Plus(u);
+                srf->ctrl[1][0] = of.Plus(v);
+                srf->ctrl[1][1] = of.Plus(u).Plus(v);
+                srf->weight[0][0] = 1;
+                srf->weight[0][1] = 1;
+                srf->weight[1][0] = 1;
+                srf->weight[1][1] = 1;
+
+                if(oldn.Dot(srf->NormalAt(0.5, 0.5)) < 0) {
+                    swap(srf->ctrl[0][0], srf->ctrl[1][0]);
+                    swap(srf->ctrl[0][1], srf->ctrl[1][1]);
+                }
+                continue;
+            }
+
+            if(fabs(d0 - d1) < LENGTH_EPS) {
+                // This is a cylinder; so transpose it so that we'll recognize
+                // it as a surface of extrusion.
+                SSurface sn = *srf;
+
+                // Transposing u and v flips the normal, so reverse u to
+                // flip it again and put it back where we started.
+                sn.degm = 2;
+                sn.degn = 1;
+                int dm, dn;
+                for(dm = 0; dm <= 1; dm++) {
+                    for(dn = 0; dn <= 2; dn++) {
+                        sn.ctrl  [dn][dm] = srf->ctrl  [1-dm][dn];
+                        sn.weight[dn][dm] = srf->weight[1-dm][dn];
+                    }
+                }
+
+                *srf = sn;
+                continue;
+            }
+        }
+    }
+}
+
+void SShell::MakeFromCopyOf(SShell *a) {
+    ssassert(this != a, "Can't make from copy of self");
+    MakeFromTransformationOf(a,
+        Vector::From(0, 0, 0), Quaternion::IDENTITY, 1.0);
+}
+
+void SShell::MakeFromTransformationOf(SShell *a,
+                                      Vector t, Quaternion q, double scale)
+{
+    booleanFailed = false;
+    surface.ReserveMore(a->surface.n);
+    for(SSurface &s : a->surface) {
+        SSurface n;
+        n = SSurface::FromTransformationOf(&s, t, q, scale, /*includingTrims=*/true);
+        surface.Add(&n); // keeping the old ID
+    }
+
+    curve.ReserveMore(a->curve.n);
+    for(SCurve &c : a->curve) {
+        SCurve n;
+        n = SCurve::FromTransformationOf(&c, t, q, scale);
+        curve.Add(&n); // keeping the old ID
+    }
+}
+
+void SShell::MakeEdgesInto(SEdgeList *sel) {
+    for(SSurface &s : surface) {
+        s.MakeEdgesInto(this, sel, SSurface::MakeAs::XYZ);
+    }
+}
+
+void SShell::MakeSectionEdgesInto(Vector n, double d, SEdgeList *sel, SBezierList *sbl)
+{
+    for(SSurface &s : surface) {
+        if(s.CoincidentWithPlane(n, d)) {
+            s.MakeSectionEdgesInto(this, sel, sbl);
+        }
+    }
+}
+
+void SShell::TriangulateInto(SMesh *sm) {
+#pragma omp parallel for
+    for(int i=0; i<surface.n; i++) {
+        SSurface *s = &surface[i];
+        SMesh m;
+        s->TriangulateInto(this, &m);
+        #pragma omp critical
+        sm->MakeFromCopyOf(&m);
+        m.Clear();
+    }
+}
+
+bool SShell::IsEmpty() const {
+    return surface.IsEmpty();
+}
+
+void SShell::Clear() {
+    for(SSurface &s : surface) {
+        s.Clear();
+    }
+    surface.Clear();
+
+    for(SCurve &c : curve) {
+        c.Clear();
+    }
+    curve.Clear();
+}

src/srf/surface.cpp

@@ -489,608 +489,4 @@ void SSurface::Clear() {
     trim.Clear();
 }
 
-typedef struct {
-    hSCurve     hc;
-    hSSurface   hs;
-} TrimLine;
 
-void SShell::MakeFromExtrusionOf(SBezierLoopSet *sbls, Vector t0, Vector t1, RgbaColor color)
-{
-    // Make the extrusion direction consistent with respect to the normal
-    // of the sketch we're extruding.
-    if((t0.Minus(t1)).Dot(sbls->normal) < 0) {
-        swap(t0, t1);
-    }
-
-    // Define a coordinate system to contain the original sketch, and get
-    // a bounding box in that csys
-    Vector n = sbls->normal.ScaledBy(-1);
-    Vector u = n.Normal(0), v = n.Normal(1);
-    Vector orig = sbls->point;
-    double umax = VERY_NEGATIVE, umin = VERY_POSITIVE;
-    sbls->GetBoundingProjd(u, orig, &umin, &umax);
-    double vmax = VERY_NEGATIVE, vmin = VERY_POSITIVE;
-    sbls->GetBoundingProjd(v, orig, &vmin, &vmax);
-    // and now fix things up so that all u and v lie between 0 and 1
-    orig = orig.Plus(u.ScaledBy(umin));
-    orig = orig.Plus(v.ScaledBy(vmin));
-    u = u.ScaledBy(umax - umin);
-    v = v.ScaledBy(vmax - vmin);
-
-    // So we can now generate the top and bottom surfaces of the extrusion,
-    // planes within a translated (and maybe mirrored) version of that csys.
-    SSurface s0, s1;
-    s0 = SSurface::FromPlane(orig.Plus(t0), u, v);
-    s0.color = color;
-    s1 = SSurface::FromPlane(orig.Plus(t1).Plus(u), u.ScaledBy(-1), v);
-    s1.color = color;
-    hSSurface hs0 = surface.AddAndAssignId(&s0),
-              hs1 = surface.AddAndAssignId(&s1);
-
-    // Now go through the input curves. For each one, generate its surface
-    // of extrusion, its two translated trim curves, and one trim line. We
-    // go through by loops so that we can assign the lines correctly.
-    SBezierLoop *sbl;
-    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
-        SBezier *sb;
-        List<TrimLine> trimLines = {};
-
-        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
-            // Generate the surface of extrusion of this curve, and add
-            // it to the list
-            SSurface ss = SSurface::FromExtrusionOf(sb, t0, t1);
-            ss.color = color;
-            hSSurface hsext = surface.AddAndAssignId(&ss);
-
-            // Translate the curve by t0 and t1 to produce two trim curves
-            SCurve sc = {};
-            sc.isExact = true;
-            sc.exact = sb->TransformedBy(t0, Quaternion::IDENTITY, 1.0);
-            (sc.exact).MakePwlInto(&(sc.pts));
-            sc.surfA = hs0;
-            sc.surfB = hsext;
-            hSCurve hc0 = curve.AddAndAssignId(&sc);
-
-            sc = {};
-            sc.isExact = true;
-            sc.exact = sb->TransformedBy(t1, Quaternion::IDENTITY, 1.0);
-            (sc.exact).MakePwlInto(&(sc.pts));
-            sc.surfA = hs1;
-            sc.surfB = hsext;
-            hSCurve hc1 = curve.AddAndAssignId(&sc);
-
-            STrimBy stb0, stb1;
-            // The translated curves trim the flat top and bottom surfaces.
-            stb0 = STrimBy::EntireCurve(this, hc0, /*backwards=*/false);
-            stb1 = STrimBy::EntireCurve(this, hc1, /*backwards=*/true);
-            (surface.FindById(hs0))->trim.Add(&stb0);
-            (surface.FindById(hs1))->trim.Add(&stb1);
-
-            // The translated curves also trim the surface of extrusion.
-            stb0 = STrimBy::EntireCurve(this, hc0, /*backwards=*/true);
-            stb1 = STrimBy::EntireCurve(this, hc1, /*backwards=*/false);
-            (surface.FindById(hsext))->trim.Add(&stb0);
-            (surface.FindById(hsext))->trim.Add(&stb1);
-
-            // And form the trim line
-            Vector pt = sb->Finish();
-            sc = {};
-            sc.isExact = true;
-            sc.exact = SBezier::From(pt.Plus(t0), pt.Plus(t1));
-            (sc.exact).MakePwlInto(&(sc.pts));
-            hSCurve hl = curve.AddAndAssignId(&sc);
-            // save this for later
-            TrimLine tl;
-            tl.hc = hl;
-            tl.hs = hsext;
-            trimLines.Add(&tl);
-        }
-
-        int i;
-        for(i = 0; i < trimLines.n; i++) {
-            TrimLine *tl = &(trimLines[i]);
-            SSurface *ss = surface.FindById(tl->hs);
-
-            TrimLine *tlp = &(trimLines[WRAP(i-1, trimLines.n)]);
-
-            STrimBy stb;
-            stb = STrimBy::EntireCurve(this, tl->hc, /*backwards=*/true);
-            ss->trim.Add(&stb);
-            stb = STrimBy::EntireCurve(this, tlp->hc, /*backwards=*/false);
-            ss->trim.Add(&stb);
-
-            (curve.FindById(tl->hc))->surfA = ss->h;
-            (curve.FindById(tlp->hc))->surfB = ss->h;
-        }
-        trimLines.Clear();
-    }
-}
-
-bool SShell::CheckNormalAxisRelationship(SBezierLoopSet *sbls, Vector pt, Vector axis, double da, double dx)
-// Check that the direction of revolution/extrusion ends up parallel to the normal of
-// the sketch, on the side of the axis where the sketch is.
-{
-    SBezierLoop *sbl;
-    Vector pto;
-    double md = VERY_NEGATIVE;
-    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
-        SBezier *sb;
-        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
-            // Choose the point farthest from the axis; we'll get garbage
-            // if we choose a point that lies on the axis, for example.
-            // (And our surface will be self-intersecting if the sketch
-            // spans the axis, so don't worry about that.)
-            for(int i = 0; i <= sb->deg; i++) {
-                Vector p = sb->ctrl[i];
-                double d = p.DistanceToLine(pt, axis);
-                if(d > md) {
-                    md  = d;
-                    pto = p;
-                }
-            }
-        }
-    }
-    Vector ptc = pto.ClosestPointOnLine(pt, axis),
-           up = axis.Cross(pto.Minus(ptc)).ScaledBy(da),
-           vp = up.Plus(axis.ScaledBy(dx));
-   
-    return (vp.Dot(sbls->normal) > 0);
-}
-
-// sketch must not contain the axis of revolution as a non-construction line for helix
-void SShell::MakeFromHelicalRevolutionOf(SBezierLoopSet *sbls, Vector pt, Vector axis,
-                                         RgbaColor color, Group *group, double angles,
-                                         double anglef, double dists, double distf) {
-    int i0 = surface.n; // number of pre-existing surfaces
-    SBezierLoop *sbl;
-    // for testing - hard code the axial distance, and number of sections.
-    // distance will need to be parameters in the future.
-    double dist  = distf - dists;
-    int sections = (int)(fabs(anglef - angles) / (PI / 2) + 1);
-    double wedge = (anglef - angles) / sections;
-    int startMapping = Group::REMAP_LATHE_START, endMapping = Group::REMAP_LATHE_END;
-
-    if(CheckNormalAxisRelationship(sbls, pt, axis, anglef-angles, distf-dists)) {
-        swap(angles, anglef);
-        swap(dists, distf);
-        dist  = -dist;
-        wedge = -wedge;
-        swap(startMapping, endMapping);
-    }
-
-    // Define a coordinate system to contain the original sketch, and get
-    // a bounding box in that csys
-    Vector n = sbls->normal.ScaledBy(-1);
-    Vector u = n.Normal(0), v = n.Normal(1);
-    Vector orig = sbls->point;
-    double umax = VERY_NEGATIVE, umin = VERY_POSITIVE;
-    sbls->GetBoundingProjd(u, orig, &umin, &umax);
-    double vmax = VERY_NEGATIVE, vmin = VERY_POSITIVE;
-    sbls->GetBoundingProjd(v, orig, &vmin, &vmax);
-    // and now fix things up so that all u and v lie between 0 and 1
-    orig = orig.Plus(u.ScaledBy(umin));
-    orig = orig.Plus(v.ScaledBy(vmin));
-    u    = u.ScaledBy(umax - umin);
-    v    = v.ScaledBy(vmax - vmin);
-
-    // So we can now generate the end caps of the extrusion within
-    // a translated and rotated (and maybe mirrored) version of that csys.
-    SSurface s0, s1;
-    s0 = SSurface::FromPlane(orig.RotatedAbout(pt, axis, angles).Plus(axis.ScaledBy(dists)),
-                             u.RotatedAbout(axis, angles), v.RotatedAbout(axis, angles));
-    s0.color = color;
-
-    hEntity face0 = group->Remap(Entity::NO_ENTITY, startMapping);
-    s0.face = face0.v;
-
-    s1 = SSurface::FromPlane(
-        orig.Plus(u).RotatedAbout(pt, axis, anglef).Plus(axis.ScaledBy(distf)),
-        u.ScaledBy(-1).RotatedAbout(axis, anglef), v.RotatedAbout(axis, anglef));
-    s1.color = color;
-
-    hEntity face1 = group->Remap(Entity::NO_ENTITY, endMapping);
-    s1.face = face1.v;
-
-    hSSurface hs0 = surface.AddAndAssignId(&s0);
-    hSSurface hs1 = surface.AddAndAssignId(&s1);
-
-    // Now we actually build and trim the swept surfaces. One loop at a time.
-    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
-        int i, j;
-        SBezier *sb;
-        List<std::vector<hSSurface>> hsl = {};
-
-        // This is where all the NURBS are created and Remapped to the generating curve
-        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
-            std::vector<hSSurface> revs(sections);
-            for(j = 0; j < sections; j++) {
-                if((dist == 0) && sb->deg == 1 &&
-                   (sb->ctrl[0]).DistanceToLine(pt, axis) < LENGTH_EPS &&
-                   (sb->ctrl[1]).DistanceToLine(pt, axis) < LENGTH_EPS) {
-                    // This is a line on the axis of revolution; it does
-                    // not contribute a surface.
-                    revs[j].v = 0;
-                } else {
-                    SSurface ss = SSurface::FromRevolutionOf(
-                        sb, pt, axis, angles + (wedge)*j, angles + (wedge) * (j + 1),
-                        dists + j * dist / sections, dists + (j + 1) * dist / sections);
-                    ss.color = color;
-                    if(sb->entity != 0) {
-                        hEntity he;
-                        he.v          = sb->entity;
-                        hEntity hface = group->Remap(he, Group::REMAP_LINE_TO_FACE);
-                        if(SK.entity.FindByIdNoOops(hface) != NULL) {
-                            ss.face = hface.v;
-                        }
-                    }
-                    revs[j] = surface.AddAndAssignId(&ss);
-                }
-            }
-            hsl.Add(&revs);
-        }
-        // Still the same loop. Need to create trim curves
-        for(i = 0; i < sbl->l.n; i++) {
-            std::vector<hSSurface> revs = hsl[i], revsp = hsl[WRAP(i - 1, sbl->l.n)];
-
-            sb = &(sbl->l[i]);
-
-            // we will need the grid t-values for this entire row of surfaces
-            List<double> t_values;
-            t_values = {};
-            if (revs[0].v) { 
-                double ps = 0.0;
-                t_values.Add(&ps);
-                (surface.FindById(revs[0]))->MakeTriangulationGridInto(
-                        &t_values, 0.0, 1.0, true, 0);
-            }
-            // we generate one more curve than we did surfaces
-            for(j = 0; j <= sections; j++) {
-                SCurve sc;
-                Quaternion qs = Quaternion::From(axis, angles + wedge * j);
-                // we want Q*(x - p) + p = Q*x + (p - Q*p)
-                Vector ts =
-                    pt.Minus(qs.Rotate(pt)).Plus(axis.ScaledBy(dists + j * dist / sections));
-
-                // If this input curve generated a surface, then trim that
-                // surface with the rotated version of the input curve.
-                if(revs[0].v) { // not d[j] because crash on j==sections
-                    sc         = {};
-                    sc.isExact = true;
-                    sc.exact   = sb->TransformedBy(ts, qs, 1.0);
-                    // make the PWL for the curve based on t value list
-                    for(int x = 0; x < t_values.n; x++) {
-                        SCurvePt scpt;
-                        scpt.tag    = 0;
-                        scpt.p      = sc.exact.PointAt(t_values[x]);
-                        scpt.vertex = (x == 0) || (x == (t_values.n - 1));
-                        sc.pts.Add(&scpt);
-                    }
-
-                    // the surfaces already exists so trim with this curve
-                    if(j < sections) {
-                        sc.surfA = revs[j];
-                    } else {
-                        sc.surfA = hs1; // end cap
-                    }
-
-                    if(j > 0) {
-                        sc.surfB = revs[j - 1];
-                    } else {
-                        sc.surfB = hs0; // staring cap
-                    }
-
-                    hSCurve hcb = curve.AddAndAssignId(&sc);
-
-                    STrimBy stb;
-                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/true);
-                    (surface.FindById(sc.surfA))->trim.Add(&stb);
-                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/false);
-                    (surface.FindById(sc.surfB))->trim.Add(&stb);
-                } else if(j == 0) { // curve was on the rotation axis and is shared by the end caps.
-                    sc         = {};
-                    sc.isExact = true;
-                    sc.exact   = sb->TransformedBy(ts, qs, 1.0);
-                    (sc.exact).MakePwlInto(&(sc.pts));
-                    sc.surfA    = hs1; // end cap
-                    sc.surfB    = hs0; // staring cap
-                    hSCurve hcb = curve.AddAndAssignId(&sc);
-
-                    STrimBy stb;
-                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/true);
-                    (surface.FindById(sc.surfA))->trim.Add(&stb);
-                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/false);
-                    (surface.FindById(sc.surfB))->trim.Add(&stb);
-                }
-
-                // And if this input curve and the one after it both generated
-                // surfaces, then trim both of those by the appropriate
-                // curve based on the control points.
-                if((j < sections) && revs[j].v && revsp[j].v) {
-                    SSurface *ss = surface.FindById(revs[j]);
-
-                    sc         = {};
-                    sc.isExact = true;
-                    sc.exact   = SBezier::From(ss->ctrl[0][0], ss->ctrl[0][1], ss->ctrl[0][2]);
-                    sc.exact.weight[1] = ss->weight[0][1];
-                    double max_dt = 0.5;
-                    if (sc.exact.deg > 1) max_dt = 0.125;
-                    (sc.exact).MakePwlInto(&(sc.pts), 0.0, max_dt);
-                    sc.surfA = revs[j];
-                    sc.surfB = revsp[j];
-
-                    hSCurve hcc = curve.AddAndAssignId(&sc);
-
-                    STrimBy stb;
-                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/false);
-                    (surface.FindById(sc.surfA))->trim.Add(&stb);
-                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/true);
-                    (surface.FindById(sc.surfB))->trim.Add(&stb);
-                }
-            }
-            t_values.Clear();
-        }
-
-        hsl.Clear();
-    }
-
-    if(dist == 0) {
-        MakeFirstOrderRevolvedSurfaces(pt, axis, i0);
-    }
-}
-
-void SShell::MakeFromRevolutionOf(SBezierLoopSet *sbls, Vector pt, Vector axis, RgbaColor color,
-                                  Group *group) {
-    int i0 = surface.n; // number of pre-existing surfaces
-    SBezierLoop *sbl;
-
-    if(CheckNormalAxisRelationship(sbls, pt, axis, 1.0, 0.0)) {
-        axis = axis.ScaledBy(-1);
-    }
-
-    // Now we actually build and trim the surfaces.
-    for(sbl = sbls->l.First(); sbl; sbl = sbls->l.NextAfter(sbl)) {
-        int i, j;
-        SBezier *sb;
-        List<std::vector<hSSurface>> hsl = {};
-
-        for(sb = sbl->l.First(); sb; sb = sbl->l.NextAfter(sb)) {
-            std::vector<hSSurface> revs(4);
-            for(j = 0; j < 4; j++) {
-                if(sb->deg == 1 &&
-                    (sb->ctrl[0]).DistanceToLine(pt, axis) < LENGTH_EPS &&
-                    (sb->ctrl[1]).DistanceToLine(pt, axis) < LENGTH_EPS)
-                {
-                    // This is a line on the axis of revolution; it does
-                    // not contribute a surface.
-                    revs[j].v = 0;
-                } else {
-                    SSurface ss = SSurface::FromRevolutionOf(sb, pt, axis, (PI / 2) * j,
-                                                             (PI / 2) * (j + 1), 0.0, 0.0);
-                    ss.color = color;
-                    if(sb->entity != 0) {
-                        hEntity he;
-                        he.v = sb->entity;
-                        hEntity hface = group->Remap(he, Group::REMAP_LINE_TO_FACE);
-                        if(SK.entity.FindByIdNoOops(hface) != NULL) {
-                            ss.face = hface.v;
-                        }
-                    }
-                    revs[j] = surface.AddAndAssignId(&ss);
-                }
-            }
-            hsl.Add(&revs);
-        }
-
-        for(i = 0; i < sbl->l.n; i++) {
-            std::vector<hSSurface> revs  = hsl[i],
-                     revsp = hsl[WRAP(i-1, sbl->l.n)];
-
-            sb   = &(sbl->l[i]);
-
-            for(j = 0; j < 4; j++) {
-                SCurve sc;
-                Quaternion qs = Quaternion::From(axis, (PI/2)*j);
-                // we want Q*(x - p) + p = Q*x + (p - Q*p)
-                Vector ts = pt.Minus(qs.Rotate(pt));
-
-                // If this input curve generate a surface, then trim that
-                // surface with the rotated version of the input curve.
-                if(revs[j].v) {
-                    sc = {};
-                    sc.isExact = true;
-                    sc.exact = sb->TransformedBy(ts, qs, 1.0);
-                    (sc.exact).MakePwlInto(&(sc.pts));
-                    sc.surfA = revs[j];
-                    sc.surfB = revs[WRAP(j-1, 4)];
-
-                    hSCurve hcb = curve.AddAndAssignId(&sc);
-
-                    STrimBy stb;
-                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/true);
-                    (surface.FindById(sc.surfA))->trim.Add(&stb);
-                    stb = STrimBy::EntireCurve(this, hcb, /*backwards=*/false);
-                    (surface.FindById(sc.surfB))->trim.Add(&stb);
-                }
-
-                // And if this input curve and the one after it both generated
-                // surfaces, then trim both of those by the appropriate
-                // circle.
-                if(revs[j].v && revsp[j].v) {
-                    SSurface *ss = surface.FindById(revs[j]);
-
-                    sc = {};
-                    sc.isExact = true;
-                    sc.exact = SBezier::From(ss->ctrl[0][0],
-                                             ss->ctrl[0][1],
-                                             ss->ctrl[0][2]);
-                    sc.exact.weight[1] = ss->weight[0][1];
-                    (sc.exact).MakePwlInto(&(sc.pts));
-                    sc.surfA = revs[j];
-                    sc.surfB = revsp[j];
-
-                    hSCurve hcc = curve.AddAndAssignId(&sc);
-
-                    STrimBy stb;
-                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/false);
-                    (surface.FindById(sc.surfA))->trim.Add(&stb);
-                    stb = STrimBy::EntireCurve(this, hcc, /*backwards=*/true);
-                    (surface.FindById(sc.surfB))->trim.Add(&stb);
-                }
-            }
-        }
-
-        hsl.Clear();
-    }
-
-    MakeFirstOrderRevolvedSurfaces(pt, axis, i0);
-}
-
-void SShell::MakeFirstOrderRevolvedSurfaces(Vector pt, Vector axis, int i0) {
-    int i;
-
-    for(i = i0; i < surface.n; i++) {
-        SSurface *srf = &(surface[i]);
-
-        // Revolution of a line; this is potentially a plane, which we can
-        // rewrite to have degree (1, 1).
-        if(srf->degm == 1 && srf->degn == 2) {
-            // close start, far start, far finish
-            Vector cs, fs, ff;
-            double d0, d1;
-            d0 = (srf->ctrl[0][0]).DistanceToLine(pt, axis);
-            d1 = (srf->ctrl[1][0]).DistanceToLine(pt, axis);
-
-            if(d0 > d1) {
-                cs = srf->ctrl[1][0];
-                fs = srf->ctrl[0][0];
-                ff = srf->ctrl[0][2];
-            } else {
-                cs = srf->ctrl[0][0];
-                fs = srf->ctrl[1][0];
-                ff = srf->ctrl[1][2];
-            }
-
-            // origin close, origin far
-            Vector oc = cs.ClosestPointOnLine(pt, axis),
-                   of = fs.ClosestPointOnLine(pt, axis);
-
-            if(oc.Equals(of)) {
-                // This is a plane, not a (non-degenerate) cone.
-                Vector oldn = srf->NormalAt(0.5, 0.5);
-
-                Vector u = fs.Minus(of), v;
-
-                v = (axis.Cross(u)).WithMagnitude(1);
-
-                double vm = (ff.Minus(of)).Dot(v);
-                v = v.ScaledBy(vm);
-
-                srf->degm = 1;
-                srf->degn = 1;
-                srf->ctrl[0][0] = of;
-                srf->ctrl[0][1] = of.Plus(u);
-                srf->ctrl[1][0] = of.Plus(v);
-                srf->ctrl[1][1] = of.Plus(u).Plus(v);
-                srf->weight[0][0] = 1;
-                srf->weight[0][1] = 1;
-                srf->weight[1][0] = 1;
-                srf->weight[1][1] = 1;
-
-                if(oldn.Dot(srf->NormalAt(0.5, 0.5)) < 0) {
-                    swap(srf->ctrl[0][0], srf->ctrl[1][0]);
-                    swap(srf->ctrl[0][1], srf->ctrl[1][1]);
-                }
-                continue;
-            }
-
-            if(fabs(d0 - d1) < LENGTH_EPS) {
-                // This is a cylinder; so transpose it so that we'll recognize
-                // it as a surface of extrusion.
-                SSurface sn = *srf;
-
-                // Transposing u and v flips the normal, so reverse u to
-                // flip it again and put it back where we started.
-                sn.degm = 2;
-                sn.degn = 1;
-                int dm, dn;
-                for(dm = 0; dm <= 1; dm++) {
-                    for(dn = 0; dn <= 2; dn++) {
-                        sn.ctrl  [dn][dm] = srf->ctrl  [1-dm][dn];
-                        sn.weight[dn][dm] = srf->weight[1-dm][dn];
-                    }
-                }
-
-                *srf = sn;
-                continue;
-            }
-        }
-    }
-}
-
-void SShell::MakeFromCopyOf(SShell *a) {
-    ssassert(this != a, "Can't make from copy of self");
-    MakeFromTransformationOf(a,
-        Vector::From(0, 0, 0), Quaternion::IDENTITY, 1.0);
-}
-
-void SShell::MakeFromTransformationOf(SShell *a,
-                                      Vector t, Quaternion q, double scale)
-{
-    booleanFailed = false;
-    surface.ReserveMore(a->surface.n);
-    for(SSurface &s : a->surface) {
-        SSurface n;
-        n = SSurface::FromTransformationOf(&s, t, q, scale, /*includingTrims=*/true);
-        surface.Add(&n); // keeping the old ID
-    }
-
-    curve.ReserveMore(a->curve.n);
-    for(SCurve &c : a->curve) {
-        SCurve n;
-        n = SCurve::FromTransformationOf(&c, t, q, scale);
-        curve.Add(&n); // keeping the old ID
-    }
-}
-
-void SShell::MakeEdgesInto(SEdgeList *sel) {
-    for(SSurface &s : surface) {
-        s.MakeEdgesInto(this, sel, SSurface::MakeAs::XYZ);
-    }
-}
-
-void SShell::MakeSectionEdgesInto(Vector n, double d, SEdgeList *sel, SBezierList *sbl)
-{
-    for(SSurface &s : surface) {
-        if(s.CoincidentWithPlane(n, d)) {
-            s.MakeSectionEdgesInto(this, sel, sbl);
-        }
-    }
-}
-
-void SShell::TriangulateInto(SMesh *sm) {
-#pragma omp parallel for
-    for(int i=0; i<surface.n; i++) {
-        SSurface *s = &surface[i];
-        SMesh m;
-        s->TriangulateInto(this, &m);
-        #pragma omp critical
-        sm->MakeFromCopyOf(&m);
-        m.Clear();
-    }
-}
-
-bool SShell::IsEmpty() const {
-    return surface.IsEmpty();
-}
-
-void SShell::Clear() {
-    for(SSurface &s : surface) {
-        s.Clear();
-    }
-    surface.Clear();
-
-    for(SCurve &c : curve) {
-        c.Clear();
-    }
-    curve.Clear();
-}

src/ui.h

@@ -622,6 +622,7 @@ public:
     void HandlePointForZoomToFit(Vector p, Point2d *pmax, Point2d *pmin,
                                  double *wmin, bool usePerspective,
                                  const Camera &camera);
+    void ZoomToMouse(double delta);
     void LoopOverPoints(const std::vector<Entity *> &entities,
                         const std::vector<Constraint *> &constraints,
                         const std::vector<hEntity> &faces,
@@ -842,7 +843,7 @@ public:
     void MouseLeftDoubleClick(double x, double y);
     void MouseMiddleOrRightDown(double x, double y);
     void MouseRightUp(double x, double y);
-    void MouseScroll(double x, double y, double delta);
+    void MouseScroll(double delta);
     void MouseLeave();
     bool KeyboardEvent(Platform::KeyboardEvent event);
     void EditControlDone(const std::string &s);

test/CMakeLists.txt

@@ -76,6 +76,9 @@ target_link_libraries(solvespace-testsuite
     solvespace-headless
     ${COVERAGE_LIBRARY})
 
+target_include_directories(solvespace-testsuite
+    PRIVATE
+    ${EIGEN3_INCLUDE_DIRS})
 add_dependencies(solvespace-testsuite
     resources)