Okay folks, there was a quick fix - use a long in the perspective calculation and leave the rotation as int.
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Working on high resolution typesetter code (up to 3600 pixels per inch, up to 36"), coding on a 68020, we used 24.8 fixed point as our main representation. It's really hard to keep integer maths pixel accurate, but when you've got 8 spare bits, life get easier. (this was 1986/87)
aug 30, 2025, 7:43 am • 3 0 • view