2014-05-25 "A BEAUTIFUL RAY/TRIANGLE INTERSECTION METHOD" RAY_TRACE COLLISION MATH http://tavianator.com/2014/05/a-beautiful-raytriangle-intersection-method/ Möller–Trumbore intersection algorithm https://en.wikipedia.org/wiki/M%C3%B6ller%E2%80%93Trumbore_intersection_algorithm