Q5: In geometry.c why do you recalculate A,G,G,B when transforming to
screen coo.?
eg. A.Ap /= A.W;
A.Rp /= A.W;
A.Gp /= A.W;
A.Bp /= A.W;
How can color info change when projected on screen?
What am I missing?
Q6: How could we skip calculation on hidden objects and where in this
code? Is it sw or hw calculation?
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