4 ms·
Perspective correct texture mapping was too expensive for the hardware available at fatmap time I think ? Edit: it was actually possible at the time.
by Agingcoder 2y ago
Perspective correct texture mapping was too expensive for the hardware available at fatmap time I think ?
Edit: it was actually possible at the time.
- magicalhippo 2y agoIt was but it was borderline. A typical trick was to do the division at the start and end of a span, and interpolate linearly, rather than per pixel. This worked well enough if the triangle was seen fairly straight on and was not too large. Quake popularized the per-8 pixels technique, which is close enough in most cases.
- Agingcoder 2y agoAh yes indeed !I had forgotten about the quake trick. Thanks !