`ypr-rotation``YAW``PITCH``ROLL``#!optional``RESULT`procedureReturn the rotation matrix given by rotating by

`ROLL`radians around the z-axis followed by`PITCH`radians around the x-axis followed by`YAW`radians around the y-axis. If`RESULT`is`#t`, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If`RESULT`is not provided, the returned value will be an f32vector located in normal garbage collected memory.