I tried searching but most of the results are the opposite.
Any idea how to do this?
I tried searching but most of the results are the opposite.
Any idea how to do this?
Check this out:
Search down to “Window Coordinates”.
Alternatively, look at the source for gluProject in Mesa3D.
Note that “OpenGL Coordinates” doesn’t specify a specific source coordinate system, as OpenGL uses several coordinate systems (and you can add any ones you want to that). Presumably you mean OpenGL NDC-space coordinates (normalized device coordinates). But only you know for sure.