1 - Add option to compute sin with Bhaskaras approx instead of using a LUT.
2 - camera's focallength attribute could really rather be stored in
3 transformation.scale.z, while scale.x and scale.y could be used for
5 - ADD THIS!!! Rendering could be made faster by reusing the mapped vertex
6 coordinates between iterations when processing triangles: this supposes that
7 a triangle that's being rendered quite likely shares 1 or 2 vertices with the
8 previously rendered triangle, so there is no need to expensively transform and
9 screen-map all its vertices! ALSO: create a function that optimizes the model
10 for rendering, i.e. rearranges the triangle order to favor this optimization!