I'm trying to create a custom physics engine, and understood that I need to know the point at which a collision happens. I am new to 2d physics, and only at a grade 9 math level, so maybe I haven't yet realized that there is a way to find these coordinates using trig (I'm relatively new to that as well <img src="{SMILIES_PATH}/icon_razz.gif" alt=":P" title="Razz" /> ).
I just started understanding how programming works not to long ago, so sorry if that was a noobish question.