glUniformMatrix4fv Interface to
OpenGL function glUniformMatrix4fv
usage: glUniformMatrix4fv( location, count, transpose, value )
C function: void glUniformMatrix4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
Psychtoolbox/PsychOpenGL/MOGL/wrap/glUniformMatrix4fv.m