| 1 |
|
/* RCSid $Id$ */ |
| 2 |
|
/* |
| 3 |
< |
================================================================== |
| 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 |
|
(c) Lucerne University of Applied Sciences and Arts, |
| 9 |
< |
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 10 |
< |
================================================================== |
| 9 |
> |
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 10 |
> |
====================================================================== |
| 11 |
|
|
| 12 |
|
*/ |
| 13 |
|
|
| 17 |
|
|
| 18 |
|
#include "pmap.h" |
| 19 |
|
|
| 20 |
< |
/* |
| 21 |
< |
ambRayInPmap(): Check for DIFFUSE -> (DIFFUSE|SPECULAR) -> * |
| 22 |
< |
subpaths. These occur during the backward pass |
| 23 |
< |
when an ambient ray spawns an indirect diffuse or |
| 24 |
< |
specular ray. These subpaths are already |
| 25 |
< |
accounted for in the global photon map. |
| 26 |
< |
*/ |
| 27 |
< |
#define ambRayInPmap(r) ((r) -> crtype & AMBIENT && photonMapping && \ |
| 28 |
< |
(ambounce < 0 || (r) -> rlvl > 1 || \ |
| 29 |
< |
causticPhotonMapping || \ |
| 30 |
< |
contribPhotonMapping)) |
| 31 |
< |
|
| 32 |
< |
/* |
| 20 |
> |
/* |
| 21 |
|
Check for paths already accounted for in photon map to avoid |
| 22 |
|
double-counting during backward raytracing. |
| 23 |
< |
|
| 23 |
> |
|
| 24 |
> |
ambRayInPmap(): Check for DIFFUSE -> (DIFFUSE|SPECULAR) -> * |
| 25 |
> |
subpaths. These occur during the backward pass |
| 26 |
> |
when an ambient ray spawns an indirect diffuse or |
| 27 |
> |
specular ray. These subpaths are already |
| 28 |
> |
accounted for in the global photon map. |
| 29 |
> |
*/ |
| 30 |
> |
#define ambRayInPmap(r) ((r) -> crtype & AMBIENT && photonMapping && \ |
| 31 |
> |
(ambounce < 0 || (r) -> rlvl > 1)) |
| 32 |
> |
|
| 33 |
> |
/* |
| 34 |
|
shadowRayInPmap(): Check for DIFFUSE -> SPECULAR -> LIGHT |
| 35 |
|
subpaths. These occur during the backward pass |
| 36 |
|
when a shadow ray is transferred through a |
| 37 |
|
transparent material. These subpaths are already |
| 38 |
|
accounted for by caustic photons in the global, |
| 39 |
|
contrib, or dedicated caustic photon map. |
| 40 |
+ |
|
| 41 |
+ |
!!! DISABLED FOR TESTING PENDING REPLACEMENT BY srcRayInPmap() !!! |
| 42 |
|
*/ |
| 43 |
< |
#define shadowRayInPmap(r) ((r) -> crtype & SHADOW && \ |
| 44 |
< |
(ambounce < 0 || \ |
| 45 |
< |
((r) -> crtype & AMBIENT \ |
| 46 |
< |
? photonMapping \ |
| 47 |
< |
: causticPhotonMapping || \ |
| 48 |
< |
contribPhotonMapping))) |
| 43 |
> |
#if 1 |
| 44 |
> |
#define shadowRayInPmap(r) 0 |
| 45 |
> |
#else |
| 46 |
> |
#define shadowRayInPmap(r) (((globalPmap && ambounce < 0) || \ |
| 47 |
> |
causticPmap || contribPmap) && \ |
| 48 |
> |
(r) -> crtype & SHADOW) |
| 49 |
> |
#endif |
| 50 |
|
|
| 51 |
< |
/* Check if scattered ray spawns a caustic photon */ |
| 52 |
< |
#define PMAP_CAUSTICRAY(r) ((r) -> rtype & SPECULAR) |
| 51 |
> |
/* srcRayInPmap(): Check whether a source ray transferred through |
| 52 |
> |
* medium (e.g. glass/dielectric) is already |
| 53 |
> |
* accounted for in the photon map. This is used by |
| 54 |
> |
* badcomponent() in source.c when checking source |
| 55 |
> |
* hits (glows and lights, hence ambient and shadow |
| 56 |
> |
* rays). |
| 57 |
> |
*/ |
| 58 |
> |
#define srcRayInPmap(r) (((globalPmap && ambounce < 0) || \ |
| 59 |
> |
causticPmap || contribPmap) && \ |
| 60 |
> |
(r) -> crtype & (AMBIENT | SHADOW) && \ |
| 61 |
> |
(r) -> rtype & (TRANS | REFRACTED)) |
| 62 |
> |
|
| 63 |
> |
/* Check if scattered ray spawns a caustic photon; |
| 64 |
> |
* !!! NOTE this has to set bit 0 to properly handle caustic contrib |
| 65 |
> |
* !!! photons, so the explicit test against zero *IS* required! */ |
| 66 |
> |
#define PMAP_CAUSTICRAY(r) (((r) -> rtype & SPECULAR) != 0) |
| 67 |
|
|
| 68 |
|
|
| 69 |
|
/* Scattered photon ray types for photonRay() */ |
