autist question
given 3d vector of two points of A and B, how do i find the 2D version /projection of it
also if It has focal length, FOV, distance, position and so on so forth, and none of those properties above
just the vectors.

tldr basically two kinds of projection of a 3d vector

i remember something like x /z = u, y/z =v... and something else where 2d x, y can be definied by using x,y,z in a very simple way? idk