用四元数来表示切线空间的法线映射——我遇到的问题

Inspired by crytek's presentation on using quaternions to store tangent space in quaternions for smaller vertices, I came to the logical conclusion that if you can use quaternions to store tangent space, then you could also lerp quaternions between vertices and use them to rotate normals directly. This would eliminate the need to re-orthogonalize your tangent space vectors, or reconstruct one of them, and it would cut out a per-fragment matrix-vector multiplication, replacing it all with a single quaternion-vector multiplication.Inspired by crytek's presentation on using quat