| Revision: | 1.1 |
| Committed: | Mon Mar 24 20:51:16 2014 UTC (10 years, 1 month ago) by greg |
| Branch: | MAIN |
| CVS Tags: | rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad4R2, rad4R2P1, rad5R3, HEAD |
| Log Message: | Added Ashikhmin-Shirley BRDF model |
| # | User | Rev | Content |
|---|---|---|---|
| 1 | greg | 1.1 | { RCSid $Id$ } |
| 2 | { Ward-Geisler-Moroder-Duer isotropic BRDF model } | ||
| 3 | |||
| 4 | { Parameters (change these) } | ||
| 5 | rho_d : 0.095; | ||
| 6 | rho_s : 0.05; | ||
| 7 | a : 0.08; | ||
| 8 | |||
| 9 | exfunc(hx,hy,hz) : exp(-(hx*hx + hy*hy)/(a*a*hz*hz)) * | ||
| 10 | (hx*hx + hy*hy + hz*hz) / | ||
| 11 | (PI*a*a*hz*hz*hz*hz); | ||
| 12 | |||
| 13 | { Note that we assume i and o vectors are normalized } | ||
| 14 | |||
| 15 | wgmdiso(ix,iy,iz,ox,oy,oz) : if( -iz*oz, 0, | ||
| 16 | rho_d/PI + rho_s*exfunc(ix+ox,iy+oy,iz+oz) ); |