convert 3D coordinates to screen coordinates

[mji]

I’d never posted it, but I had actually developed a version that’s contained neatly within a COMP that does all that, plus takes into account camera position. I just uploaded it to the techniques forum. You can get it here:

Converting 3D coordinates to 2D coordinates

I put together a sample network to do this without resorting to matrices or a script of any kind. It works only if your geometry is already in camera space, which for the purposes of this sample, is accomplished by putting the camera at the origin (0,0,0) and facing down the negative z axis. I’d imagine the extra transform would be easy enough to to add in, though, if someone was so inclined. You’ll note that the red square (transformed in 2d space) tracks to the center of the torus, regardless…