Why is Concave vs Convex important to Torque?
All of the collision in Torque is done against closed convex collision meshes (the Terrain is a special case). There are some serious optimizations that can be made to collision and ray casting code if you assume that the meshes you are colliding against are closed convex volumes. Doing collision against arbitrary meshes is becoming more and more feasible as processor speeds increase (and with multiple processors and physics specific processors) but it is still much, much slower than doing collision against convex hulls. Because Torque uses only convex collision meshes, it is very important that you, as an artist, have a very clear understanding of what it means for a shape to be convex or concave. The Definitions According to Webster the definition for concave is: con·cave 1 : hollowed or rounded inward like the inside of a bowl 2 : arched in : curving in — used of the side of a curve or surface on which neighboring normals to the curve or surface converge and on which lies the chord
