Chickadee 0.9.0 released

I'm happy to announce that Chickadee 0.9.0 has been released!

Chickadee is a game development toolkit for Guile. Chickadee aims to provide all the features that parenthetically inclined game developers need to make 2D and 3D games in Scheme.

Notable improvements and changes:

The (chickadee graphics font) module has been renamed to (chickadee graphics text).
SDL2_image has been dropped in favor of using libjpeg-turbo and libpng directly.
New join procedure for scripts that mimicks traditional thread joining.
Improved error messages in chickadee play.
Languages other than Scheme can now be used with chickadee play, such as Wisp. Thanks to Arne Babenhauserheide for their contribution!
New matrix4-inverse, matrix4-inverse!, matrix4=, and matrix3=, matrix3-copy, matrix3-copy!, matrix4-copy, and matrix4-copy! procedures in (chickadee math matrix) module.
matrix4-transform! has been replaced with two procedures: matrix4-transform-vec2! and matrix4-transform-vec3!.
New #:shear keyword argument for draw-sprite and sprite-batch-add! procedures in (chickadee graphics sprite).
New ignore-files configuration option for chickadee bundle.

Bug fixes:

Games no longer crash if there is no audio device available.
Transformation matrices are now properly applied to the origins of vector paths.
Shearing is now calculated correctly in matrix4-2d-transform! in (chickadee math matrix).
set-vec3-z! is now exported from the (chickadee math vector) module.
Fixed issue with inverted Y coordinates when using bitmap fonts.
Fixed agenda-clear not resetting state correctly in (chickadee scripting agenda) module.
Cube map usage in PBR/Phong shaders now work on older OpenGL versions.
Fixed multiple bugs in chickadee bundle.
Fixed vec2-clamp-to-rect implementation in (chickadee math rect).