2013.01

Features:

• Snappier GUI while performing CGAL computations (computations running in separate thread)
• The size of the misc. caches can now be adjusted from Preferences
• The limit for when to disable OpenCSG can now be adjusted from Preferences
• Added Dot product operator: vec * vec
• Added Matrix multiplication operator: vec * mat, mat * mat
• Added search() function
• Dependencies are now tracked - any changes in uses/included files will be detected and cause a recompile
• The OPENSCADPATH environment variable is now implemented will have precedence when searching for libraries
• .csg files can now be opened from the GUI
• linear_extrude() will now assume that the first parameter means 'height' if it's a number

Bugfixes:

• use'ing an non-existing file sometimes crashed under Windows
• Better font handling: Ensure a monospace font is chosen as default
• Division by zero caused hang in some cases (e.g. sin(1/0))
• Larger minkowski operations sometimes caused a crash after a CGAL assert was thrown
• Fixed crashes in shared_ptr.hpp (or similar places) due bugs in cache management and CSG normalization
• scale() with a scale factor of zero could cause a crash
• Fixed a number of issues related to use/include
• Providing an unknown parameter on the cmd-line caused a crash
• cmd-line overrides using -D now also work for USEd modules
• Modifier characters can now be used in front of if statements
• rotate() with a vector argument with less that 3 elements used uninitialized variables, ending up being non-deterministic.
• .csg files will now have relative filenames whenever possible
• Don't just ignore geometric nodes having zero volume/area - when doing difference/intersection, they tend to turn negative objects into positive ones.
• Always use utf-8 file encoding, also under Windows
• A lot of build script fixes
• Some other crash bugs fixes

Deprecations:

• The old include syntax "<filename.scad>" without the include keyword is no longer supported and will cause a syntax error.