| 1 |
+ |
/* RCSid $Id$ */ |
| 2 |
|
/* |
| 3 |
|
================================================================== |
| 4 |
|
Photon map support routines for scattering by materials. |
| 5 |
|
|
| 6 |
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 7 |
|
(c) Fraunhofer Institute for Solar Energy Systems, |
| 8 |
< |
Lucerne University of Applied Sciences & Arts |
| 8 |
> |
(c) Lucerne University of Applied Sciences and Arts, |
| 9 |
> |
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 10 |
|
================================================================== |
| 11 |
|
|
| 12 |
|
$Id$ |
| 19 |
|
#include "pmap.h" |
| 20 |
|
|
| 21 |
|
/* |
| 22 |
< |
Checks for paths already accounted for in photon map to avoid |
| 22 |
> |
Check for paths already accounted for in photon map to avoid |
| 23 |
|
double-counting during backward raytracing. |
| 24 |
|
|
| 23 |
– |
ambRayInPmap(): Check for DIFFUSE -> (DIFFUSE|SPECULAR) -> * |
| 24 |
– |
subpaths. These occur during the backward pass |
| 25 |
– |
when an ambient ray spawns an indirect diffuse or |
| 26 |
– |
specular ray. These subpaths are already |
| 27 |
– |
accounted for in the global photon map. |
| 28 |
– |
|
| 25 |
|
shadowRayInPmap(): Check for DIFFUSE -> SPECULAR -> LIGHT |
| 26 |
|
subpaths. These occur during the backward pass |
| 27 |
|
when a shadow ray is transferred through a |
| 29 |
|
accounted for by caustic photons in the global, |
| 30 |
|
contrib, or dedicated caustic photon map. |
| 31 |
|
*/ |
| 32 |
< |
#define ambRayInPmap(r) ((r) -> crtype & AMBIENT && photonMapping) |
| 33 |
< |
|
| 32 |
> |
/* |
| 33 |
> |
#define ambRayInPmap(r) ((r) -> crtype & AMBIENT && \ |
| 34 |
> |
((photonMapping && \ |
| 35 |
> |
(ambounce < 0 || (r) -> rlvl > 1)) || \ |
| 36 |
> |
causticPhotonMapping || contribPhotonMapping)) |
| 37 |
> |
*/ |
| 38 |
> |
#define ambRayInPmap(r) 0 |
| 39 |
|
#define shadowRayInPmap(r) ((r) -> crtype & SHADOW && \ |
| 40 |
< |
((photonMapping && ambounce < 0) || \ |
| 41 |
< |
(causticPhotonMapping || \ |
| 41 |
< |
contribPhotonMapping))) |
| 40 |
> |
(ambounce < 0 || ((r) -> crtype & AMBIENT ? \ |
| 41 |
> |
photonMapping : causticPhotonMapping))) |
| 42 |
|
|
| 43 |
|
/* Check if scattered ray spawns a caustic photon */ |
| 44 |
|
#define PMAP_CAUSTICRAY(r) ((r) -> rtype & SPECULAR) |
