Model support for collision meshes about directxtk HOT 2 OPEN

D3DX's Mesh Intersect performed the following test.

• Perform a ray-hit test against the bounding box of the mesh. If it missed, no hits. If it hit, further processing.
• Allocate an array of Booleans with the same number of entries as the maximum vertex index in the mesh.
• Generates a plane containing the test ray, and store if the vertex was 'in front' or 'behind' that test plane.
• For each triangle in the mesh, first check to see if all vertices in the triangle are on the same 'side' of the test plane by looking in that array. If they are, skip testing that triangle because it can't hit the ray.
• Compute triangle hit test. All hits are stored in an array in sorted order.

from directxtk.

Could support by adding a 'flags' option to Model::CreateFrom* to include collision data in the form of two simple std::vector arrays in ModelMesh.

from directxtk.