Changelog ========= 3.0 --- New export/import features: * Three.js: allow configuring projection for exported model, and initially use the current viewport projection. Other new features: * New command for measuring total length of selected entities, "Analyze → Measure Perimeter". * 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. 2.2 --- Other new features: * OS X: support 3Dconnexion devices (SpaceMouse, SpaceNavigator, etc). 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. 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.