Changelog ========= 3.x - since the 3.0 release, only available in edge builds --- New Constraints: * Arcs length ratio and difference. * Arc & Line length ratio and difference. Sketching: * Allow use of Point & Normal to define "sketch-in-new-workplane". * Update "Property Browser" live while dragging the sketch. MISC: * When linking circuit boards (IDF .emn files) show keepout regions as construction entities. Performance: * More changes to the ID list implementation. 3.0 --- New sketch features: * New intersection boolean operation for solid models. * New groups, revolution and helical extrusion. * Extrude, lathe, translate and rotate groups can use the "assembly" boolean operation, to increase performance. * The solid model of extrude and lathe groups can be suppressed, for splitting a single model in multiple parts to export, or if only the generated entities are desired, without the mesh. * Translate and rotate groups can create n-dimensional arrays using the "difference" and "assembly" boolean operations. * A new sketch in workplane group can be created based on existing workplane. * TTF text request has two additional points on the right side, which allow constraining the width of text. * Image requests can now be created, similar to TTF text requests. This replaces the "style → background image" feature. * Irrelevant points (e.g. arc center point) are not counted when estimating the bounding box used to compute chord tolerance. * When adding a constraint which has a label and is redundant with another constraint, the constraint is added as a reference, avoiding an error. * Datum points can be copied and pasted. * "Split Curves at Intersection" can now split curves at point lying on curve, not just at intersection of two curves. * Property browser now shows amount of degrees of freedom in group list. It also shows a yellow "err" if the sketch has problems (e.g. self intersecting) that would propagate in subsequent groups. * It is now possible to press "g" to toggle construction on new objects while they are still being drawn. * Allow right click to end sketching of all entities. New constraint features: * When dragging an arc or rectangle point, it will be automatically constrained to other points with a click. * When selecting a constraint, the requests it constraints can be selected in the text window. * When selecting an entity, the constraints applied to it can be selected in the text window. * Distance constraint labels can now be formatted to use SI prefixes. Values are edited in the configured unit regardless of label format. * When creating a constraint, if an exactly identical constraint already exists, it is now selected instead of adding a redundant constraint. * It is now possible to turn off automatic creation of horizontal/vertical constraints on line segments. * Automatic creation of constraints no longer happens if the constraint would have been redundant with other ones. * New option to open the constraint editor for newly created constraints with a value. * New "redundant constraint timeout (in ms)" option to prevent UI freeze when looking for redundant constraints. * Swap vertical and horizontal constraints when pasting rotated by 90/270 degrees. New export/import features: * Link IDF circuit boards in an assembly (.emn files) * Three.js: allow configuring projection for exported model, and initially use the current viewport projection. * Wavefront OBJ: a material file is exported alongside the model, containing mesh color information. * DXF/DWG: 3D DXF files are imported as construction entities, in 3d. * VRML (WRL) triangle meshes can now be exported, useful for e.g. [KiCAD](http://kicad.org). * Export 2d section: custom styled entities that lie in the same plane as the exported section are included. * Added ExportBackgroundColor in configuration for EPS, PDF, and SVG files. * STEP export includes object colors and transparency. * Default "line styles" have a new "export these objects" option. New rendering features: * The "Show/hide hidden lines" button is now a tri-state button that allows showing all lines (on top of shaded mesh), stippling occluded lines or not drawing them at all. * The "Show/hide outlines" button is now independent from "Show/hide edges". * "View | Darken Inactive Solids" added. When turned off and a "sketch in plane" group is active solids form previous groups will not be "darkened" (have the s000d-#def-dim-solid style applied to them). New measurement/analysis features: * New choice for base unit, meters. * New command for measuring total length of selected entities, "Analyze → Measure Perimeter". * New command for measuring center of mass, with live updates as the sketch changes, "Analyze → Center of Mass". * New option for displaying areas of closed contours. * When calculating volume of the mesh, volume of the solid from the current group is now shown alongside total volume of all solids. * When calculating area, and faces are selected, calculate area of those faces instead of the closed contour in the sketch. * When selecting a point and a line, projected distance to current workplane is displayed. Other new features: * Improvements to the text window for selected entities and constraints. * Ambient light source added in text window to allow flat shaded renderings. * New command-line interface, for batch exporting and more. * The graphical interface now supports HiDPI screens on every OS. * New option to lock Z axis to be always vertical when rotating the view, a.k.a. "turntable navigation". * New button to hide all construction entities. * New link to match the on-screen size of the sketch with its actual size, "view → set to full scale". * When zooming to fit, constraints are also considered. * Ctrl-clicking entities now deselects them, as the inverse of clicking. * When clicking on an entity that shares a place with other entities, the entity from the current group is selected. * When dragging an entity that shares a place with other entities, the entity from a request is selected. For example, dragging a point on a face of an extrusion coincident with the source sketch plane will drag the point from the source sketch. * The default font for TTF text is now Bitstream Vera Sans, which is included in the resources such that it is available on any OS. * In expressions, numbers can contain the digit group separator, "_". * The "=" key is bound to "Zoom In", like "+" key. * The numpad decimal separator key is bound to "." regardless of locale. * On Windows, full-screen mode is implemented. * On Linux, native file chooser dialog can be used. * New edit menu items "Line Styles", "View Projection" and "Configuration" that are shortcuts to the respective configuration screens. * New cmake build options using -DENABLE_OPENMP=yes and -DENABLE_LTO=yes to enable support for multi-threading and link-time optimization. * "Shift+Scroll" for ten times finer zoom. * Translations: Chinese, French, German, Russian, Turkish, Ukrainian. Bugs fixed: * Fixed broken --view options for command line thumbnail image creation. * Some errors in Triangulation of surfaces. * Some NURNS boolean operations that failed particularly on surfaces created with Lathe, Revolve, or Helix. * Segfault in Remove Spline Point context menu. * A point in 3d constrained to any line whose length is free no longer causes the line length to collapse. * Curve-line constraints (in 3d), parallel constraints (in 3d), and same orientation constraints are more robust. * Adding some constraints (vertical, midpoint, etc) twice errors out immediately, instead of later and in a confusing way. * Constraining a newly placed point to a hovered entity does not cause spurious changes in the sketch. * Points highlighted with "Analyze → Show Degrees of Freedom" are drawn on top of all other geometry. * A step rotate/translate group using a group forced to triangle mesh as a source group also gets forced to triangle mesh. * Paste Transformed with a negative scale does not invert arcs. * The tangent arc now modifies the original entities instead of deleting them, such that their constraints are retained. * When linking a sketch file, missing custom styles are now imported from the linked file. * 3Dconnexion SpaceMouse should now work (on Windows and macOS X). * Improved NURBS boolean operations on curved surfaces in some cases. * Show only usable fonts in the font selector. 2.x --- Bug fixes: * Do not crash when changing an unconstrained lathe group between union and difference modes. 2.3 --- Bug fixes: * Do not crash when applying a symmetry constraint to two points. * Fix TTF font metrics again (properly this time). * Fix the "draw back faces in red" option. * Fix export of wireframe as 3D DXF. * Various minor crashes. 2.2 --- Other new features: * OS X: support 3Dconnexion devices (SpaceMouse, SpaceNavigator, etc). * GTK: files with uppercase extensions can be opened. Bug fixes: * Do not remove autosaves after successfully opening a file, preventing data loss in case of two abnormal terminations in a row. * Do not crash when changing autosave interval. * Unbreak the "Show degrees of freedom" command. * Three.js: correctly respond to controls when browser zoom is used. * OS X: do not completely hide main window when defocused. * GTK: unbreak 3Dconnexion support. * When pasting transformed entities, multiply constraint values by scale. * Fix TTF font metrics (restore the behavior from version 2.0). * Forcibly show the current group once we start a drawing operation. * DXF export: always declare layers before using them. * Do not truncate operations on selections to first 32 selected entities. * Translate and rotate groups inherit the "suppress solid model" setting. * DXF: files with paths containing non-ASCII or spaces can be exported or imported. * Significantly improved performance when dragging an entity. * Various crashes and minor glitches. 2.1 --- New sketch features: * Lathe groups create circle and face entities. * New toolbar button for creating lathe groups. * Chord tolerance is separated into two: display chord tolerance (specified in percents, relative to model bounding box), and export chord tolerance (specified in millimeters as absolute value). * Bezier spline points can be added and removed after the spline is created. * When an unconstrained extrusion is switched between "union" and "difference", its normal is flipped. * Groups can be added in the middle of the stack. Note that this results in files incompatible with version 2.0. * Active group can be removed. * Removing an imported group does not cause all subsequent groups to also be removed. * When a new group with a solid is created, the color is taken from a previous group with a solid, if any. * Entities in a newly active group do not become visible. * When entities are selected, "Zoom to fit" zooms to fit only these entities and not the entire sketch. * Zero-length edges are reported with a "zero-length error", not "points not all coplanar". New constraint features: * Height of the font used for drawing constraint labels can be changed. * New constraint, length difference, placed with J. (Patch by Peter Ruevski) * Horizontal/vertical constraints are automatically added if a line segment is close enough to being horizontal/vertical. This can be disabled by holding Ctrl. * Reference dimensions and angles can be placed with Shift+D and Shift+N. * Copying and pasting entities duplicates any constraints that only involve entities in the clipboard, as well as selected comments. * Diameter constraints can be shown as radius. * The "pi" identifier can be used in expressions. * Constraint labels can be snapped to grid. * Integer angles are displayed without trailing zeroes. * Angle constraints have proper reference lines and arrowheads. * Extension lines are drawn for point-line distance constraints. New solver features: * Sketches with redundant and unsolvable constraints are distinguished. * New group setting, "allow redundant constraints". Note that it makes the solver less stable. New rendering and styling features: * New line style parameter: stippling, based on ISO 128. * Outlines of solids can be drawn in a particular style (by default, thick lines) controlled by the "Show outline of solid model" button. * Occluded edges can be drawn in a particular style (by default, stippled with short dashes) controlled by the "Show hidden lines" button. * Solids can be made transparent. New export/import features: * The old "import" command (for .slvs files) is renamed to "link". * If a linked .slvs file is not found, first the relative path recorded in the .slvs file is checked and then the absolute path; this is an inversion of the previously used order. If it is still not found, a dialog appears offering to locate it. * DXF and DWG files can be imported, with point-coincident, horizontal and vertical constraints automatically inferred from geometry, and distance and angle constraints created when a dimension placed against geometry exists. * Triangle mesh can be exported for viewing in the browser through WebGL. * Export dialogs remember the last file format used, and preselect it. * Exported DXF files have exact circles, arcs and splines instead of a piecewise linear approximation (unless hidden line removal was needed). * Exported DXF files preserve color and line thickness. * In exported DXF files, constraints are represented as DXF dimensions, instead of piecewise linear geometry. * When exporting 2d views, overlapping lines are removed. Other new features: * Native Linux (GTK 2 and GTK 3) and Mac OS X ports. * Automatically save and then restore sketches if SolveSpace crashes. (Patch by Marc Britten) * Unicode is supported everywhere (filenames, group names, TTF text, comments), although RTL scripts and scripts making heavy use of ligatures are not rendered correctly. * The vector font is grid-fitted when rendered on screen to make it easier to read regardless of its size. 2.0 --- Initial public release.