Generates a perspective projection matrix with the given field of view.
This is primarily useful for generating projection matrices to be used
with the still experimental WebVR API.
The near/far clip planes correspond to a normalized device coordinate Z range of [-1, 1],
which matches WebGL/OpenGL's clip volume.
Generates a perspective projection matrix with the given field of view. This is primarily useful for generating projection matrices to be used with the still experimental WebVR API. The near/far clip planes correspond to a normalized device coordinate Z range of [-1, 1], which matches WebGL/OpenGL's clip volume.