2.87
Swap yaw and pitch in camera computation. Add functions to convert view matrix to camera position, and camera position to camera yaw pitch roll.
more tutorial work add fixed_timestep command-line parameter, 0 means disabled (variable timestep)
Add pybullet transparent.py example, transparency with global per-object sort in GLInstancingRenderer
update tutorial for SIGGRAPH course allow multiple graphing windows at the same time