## Homomorphic factorization of BRDF-based lighting computation

- Lutz Latta, Andreas Kolb
- ACM Trans. Graph.
- 2002

- Published 2002

Now, let (u, v) = Rα(θ, φ′). Here, Rα = Ry(α). We omit the z rotation since that does not affect Yl0 which has no azimuthal dependence. The vector corresponding to coordinates (u, v) is then given by sinu cos v sinu sin v cos u = cosα 0 sinα 0 1 0 − sinα 0 cosα sin θ′ cosφ′ sin θ′ sinφ′ cos θ′ = cosα sin θ′ cosφ′ + sinα cos θ′ sin θ′ sinφ′ cosα cos θ′ + sinα sin θ′ (− cosφ′) . (A.3)

@inproceedings{2002AppendixAP,
title={Appendix A Properties of the Representation Matrices},
author={},
year={2002}
}