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Common Lisp port of code from Jason L. McKesson's Book: "Learning Modern 3D Graphics Programming"
Hey there, just thought I'd bring up an issue in case anyone else reads this.
The 'alpha' value is actually part of something called Homogeneous coordinates. Basically, in homogeneous coordinates:
(0.5, 0.5, 0.5, 1) == (1, 1, 1, 0.5)
- every element of a vector is multiplied by the final value.
Why is this useful? Well, that is left as an exercise to the reader ;) But yeah. Just thought I'd share what I know.
Brilliant repository by the way!
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