Original Post
hi, thisis should be real easy to do, but for some reason I cant ge t it to work and its driving me mad! i want to work out the angle of reflection of a ball hitting a flat surface, not taking into account gravity etc..
i have so far tried this, but it doesnt work :0(
newDir = oldDir - (planeNorm * (oldDir.dot(planeNorm))*2);
anyone offer any help?