Ray and convex polygon intersection

[User137]

1 other optimization that i'm adding, is approximating the face normal better. It is possible that polygon is not entirely flat. (See attached image) I will be using the method on right. These indices can be count like:

p0 = 0
p1 = 1+Count div 5
p2 = Count-1-Count div 5

I figured that 5 vertex polygon is smallest one to benefit from this change. It is possible that 3 periodic vertices are in line formation too, and in that case, the left side method (0, 1, 2) would make a really bad normal approximation.