I hope that someone here can help. I am trying to produce a simple 3D game using WebGL, but I have one major issue. I have not been able to come up with a good boundary checking method. Unlike in a 2D space where it is relatively easy to calculate where all of the relevant points are, in the 3D space I have to worry about perspective altering the relative location of all of the points of my object. So the question that I am asking is, is there either a good way of accessing the precalculated values of the points of let us say a cubeís corners or is there a good way of calculating these points myself? Any help I can receive on this would be much appreciated, I am actually writing this for a class, and itís due soon. Thanks