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How would I implement mode 7?

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DefaultioCreated:
Defaultio#1
1) What would I have to start out with? 2) It obviously needs to be optimized. 3) I know trigonometry.
JustGreat#2
Trinitro21 made a mode 7 engine. It's included in the project folder of his 3D engine. http://smilebasicsource.com/page?pid=16
Defaultio#3
I know that, I had that since it was released. It's crazy slow though. That's why I want to make my own.
snail_#4
you can't do it fast without cutting huge corners hanzo's mode7 engine isn't "traditional" mode7, it's done a different way with some intermediates to increase speed
Defaultio#5
Hm yea, you're right. But it doesn't look right. The pitch/perspective I mean. Then again it is good, but complex.
snail_#6
https://en.m.wikipedia.org/wiki/Mode_7 People use the term to refer to the specific "floor is a 3D texture" map effect you can produce in this mode and not the actual video mode itself, so it's a misnomer.