Changelog

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.