0
votes
1answer
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transformation before the perspective divide but after projecting perspectively

My problem is that I would like to confine a scene render to a (possibly rotated) rectangle without using glViewport(). I don't want to use it to save, if possible, some cycles that would otherwise be ...
0
votes
2answers
318 views

3d vertex translated onto 2d viewport

I have a spherical world defined by simple trigonometric functions to create triangles that are relatively similar in size and shape throughout. What I want to be able to do is use mouse input to ...