diff --git a/.gitignore b/.gitignore
index 39493ffa..67ed3891 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,4 +13,5 @@
 /debian/libslvs1-dev/
 /obj-*/
 /*.slvs
+.vscode/
 .idea/*
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0246a23c..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,130 +0,0 @@
-git:
-  submodules: false
-jobs:
-  allow_failures:
-    - stage: deploy
-      name: Snap arm64
-  include:
-    - stage: test
-      name: "Debian"
-      os: linux
-      dist: bionic
-      language: c
-      install: ./.travis/install-debian.sh
-      script: ./.travis/build-debian.sh
-    - stage: deploy
-      name: "OSX"
-      os: osx
-      osx_image: xcode8.3
-      language: c
-      install: ./.travis/install-macos.sh
-      # the awk command is a workaround for https://github.com/travis-ci/travis-ci/issues/4704.
-      script: ./.travis/build-macos.sh | awk '/.{0,32}/ {print $0}'
-      deploy:
-        provider: releases
-        api_key:
-          secure: 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
-        skip_cleanup: true
-        file: build/SolveSpace.dmg
-        on:
-          repo: solvespace/solvespace
-          tags: true
-    - &deploy-snap
-      stage: deploy
-      name: Snap amd64
-      os: linux
-      arch: amd64
-      dist: bionic
-      addons:
-        snaps:
-          - name: snapcraft
-            confinement: classic
-      script: ./.travis/build-snap.sh
-      deploy:
-        - provider: script
-          script: sudo ./.travis/deploy-snap.sh edge
-          skip_cleanup: true
-          on:
-            branch: master
-            repo: solvespace/solvespace
-            tags: false
-        - provider: script
-          script: sudo ./.travis/deploy-snap.sh edge,beta
-          skip_cleanup: true
-          on:
-            repo: solvespace/solvespace
-            tags: true
-    - <<: *deploy-snap
-      name: Snap arm64
-      arch: arm64
-    - &linux
-      stage: deploy
-      os: linux
-      dist: bionic
-      language: python
-      python: "3.6"
-      addons:
-        apt:
-          update: true
-          packages:
-            - patchelf
-      before_install:
-        - git submodule update --init -- extlib/mimalloc
-      install: &python-install
-        - python3 -m pip install -r cython/requirements.txt
-      script: &python-script
-        - cd cython && python3 setup.py test && cd -
-      before_deploy: cd cython
-      deploy:
-        - provider: pypi
-          user: $TWINE_USERNAME
-          password: $TWINE_PASSWORD
-          skip_cleanup: true
-          skip_existing: true
-          distributions: sdist
-          on:
-            repo: KmolYuan/solvespace
-            tags: true
-    - <<: *linux
-      python: "3.7"
-    - <<: *linux
-      python: "3.8"
-    - <<: *linux
-      python: "3.9"
-    - &osx
-      stage: deploy
-      os: osx
-      osx_image: xcode10
-      language: generic
-      env: PYTHON=3.6.0
-      before_install:
-        - git submodule update --init -- extlib/mimalloc
-        - brew update
-        - brew upgrade pyenv || true
-        - export PATH="/Users/travis/.pyenv/shims:${PATH}"
-        - pyenv install ${PYTHON}
-        - pyenv global ${PYTHON}
-        - python3 -m pip install pip -U
-        - python3 --version
-        - python3 -m pip --version
-      install: *python-install
-      script: *python-script
-      after_success:
-        # PyPI deployment
-        - if [[ "$TRAVIS_REPO_SLUG" == "KmolYuan/solvespace" && -n "$TRAVIS_TAG" ]]; then
-          python3 -m pip install wheel twine;
-          cd cython;
-          python3 setup.py bdist_wheel;
-          python3 -m twine upload dist/*.whl --skip-existing;
-          fi
-    - <<: *osx
-      env: PYTHON=3.7.0
-    - <<: *osx
-      env: PYTHON=3.8.0
-    - <<: *osx
-      env: PYTHON=3.9.0
-before_cache:
-  - rm -rf $HOME/.cache/pip/log
-cache:
-  directories:
-    - $HOME/.cache/pip
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index d861e94d..00000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,82 +0,0 @@
-version: '{build}'
-clone_depth: 1
-environment:
-  MSYS_DIR: C:\msys64
-  matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      CPP: true
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      PY: 36
-      COMPILER: mingw32
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      PY: 37
-      COMPILER: mingw32
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      PY: 38
-      COMPILER: mingw32
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      PY: 38
-      COMPILER: msvc
-for:
-  - matrix:
-      only:
-        - CPP: true
-    before_build:
-      - git submodule update --init
-      - set tag=x%APPVEYOR_REPO_TAG_NAME%
-      - if %tag:~,2% == xv (set BUILD_TYPE=RelWithDebInfo) else (set BUILD_TYPE=Debug)
-      - mkdir build
-      - cmake -G"Visual Studio 14" -Tv140 -Bbuild -H.
-    build_script:
-      - msbuild "build\src\solvespace.vcxproj" /verbosity:minimal /property:Configuration=%BUILD_TYPE% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
-      - msbuild "build\src\solvespace-cli.vcxproj" /verbosity:minimal /property:Configuration=%BUILD_TYPE% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
-      - msbuild "build\test\solvespace-testsuite.vcxproj" /verbosity:minimal /property:Configuration=%BUILD_TYPE% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
-    test_script:
-      - build\bin\%BUILD_TYPE%\solvespace-testsuite.exe
-    deploy:
-      - provider: GitHub
-        auth_token:
-          secure: P9/pf2nM+jlWKe7pCjMp41HycBNP/+5AsmE/TETrDUoBOa/9WFHelqdVFrbRn9IC
-        description: ""
-        artifact: solvespace.exe,solvespace-cli.exe,solvespace.pdb
-        on:
-          APPVEYOR_REPO_NAME: solvespace/solvespace
-          APPVEYOR_REPO_TAG: true
-  - matrix:
-      only:
-        - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    install:
-      - git submodule update --init -- extlib/mimalloc
-      # Install Python-dev
-      - IF DEFINED PYTHON_DEV choco install -y python --version %PYTHON_DEV%
-      # Environment variables
-      - set PYTHON_DIR=C:\Python%PY%-x64
-      - set Path=%MSYS_DIR%\mingw64\bin;%MSYS_DIR%\usr\bin;%Path%
-      - set Path=%PYTHON_DIR%;%PYTHON_DIR%\Scripts;%Path%
-      # Show Python
-      - python --version
-      - pip --version
-      # Upgrade setuptools
-      - pip install setuptools -U
-      # Set Python compiler to MinGW
-      - cython\platform\set_pycompiler %PYTHON_DIR% %COMPILER%
-      # Install modules
-      - pip install -r cython\requirements.txt
-    build_script:
-      - cd cython && python setup.py test && cd ..
-    after_build:
-      # PyPI deployment
-      - IF "%APPVEYOR_REPO_TAG%"=="true"
-        IF "%APPVEYOR_REPO_NAME%"=="KmolYuan/solvespace" (
-        pip install wheel twine &&
-        cd cython &&
-        python setup.py bdist_wheel &&
-        twine upload dist\*.whl --skip-existing
-        )
-artifacts:
-  - path: build\bin\%BUILD_TYPE%\solvespace.exe
-    name: solvespace.exe
-  - path: build\bin\%BUILD_TYPE%\solvespace-cli.exe
-    name: solvespace-cli.exe
-  - path: build\bin\%BUILD_TYPE%\solvespace.pdb
-    name: solvespace.pdb