This is to consolidate how we update the glConfig.stereo3Dmode, and to
update it before initializing the framebuffers so that they are
initially allocated correctly and avoid framebuffers getting reallocated
later.
- Implemented soft shadows using PCF hardware shadow mapping
The implementation uses sampler2DArrayShadow and PCF which usually
requires Direct3D 10.1 however it is in the OpenGL 3.2 core so it should
be widely supported.
All 3 light types are supported which means parallel lights (sun) use
scene independent cascaded shadow mapping.
The implementation is very fast with single taps (400 fps average per
scene on a GTX 660 ti OC) however I defaulted it to 16 taps so the shadows look
really good which should you give stable 100 fps on todays hardware.
The shadow filtering algorithm is based on Carmack's research which was
released in the original Doom 3 GPL release draw_exp.cpp.
- Changed interaction shaders to use Half-Lambert lighting like in HL2 to
make the game less dark
- Fixed some of the renderer debugging/development tools like r_showTris
