| 1 |
greg |
2.1 |
/* |
| 2 |
|
|
================================================================== |
| 3 |
|
|
Photon map support routines for scattering by materials. |
| 4 |
|
|
|
| 5 |
|
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 6 |
|
|
(c) Fraunhofer Institute for Solar Energy Systems, |
| 7 |
rschregle |
2.2 |
(c) Lucerne University of Applied Sciences and Arts, |
| 8 |
|
|
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 9 |
greg |
2.1 |
================================================================== |
| 10 |
|
|
|
| 11 |
greg |
2.6 |
$Id: pmapmat.h,v 2.5 2015/05/26 13:21:07 greg Exp $ |
| 12 |
greg |
2.1 |
*/ |
| 13 |
|
|
|
| 14 |
|
|
|
| 15 |
|
|
#ifndef PMAPMAT_H |
| 16 |
|
|
#define PMAPMAT_H |
| 17 |
|
|
|
| 18 |
|
|
#include "pmap.h" |
| 19 |
|
|
|
| 20 |
|
|
/* |
| 21 |
greg |
2.5 |
Check for paths already accounted for in photon map to avoid |
| 22 |
greg |
2.1 |
double-counting during backward raytracing. |
| 23 |
|
|
|
| 24 |
|
|
shadowRayInPmap(): Check for DIFFUSE -> SPECULAR -> LIGHT |
| 25 |
|
|
subpaths. These occur during the backward pass |
| 26 |
|
|
when a shadow ray is transferred through a |
| 27 |
|
|
transparent material. These subpaths are already |
| 28 |
|
|
accounted for by caustic photons in the global, |
| 29 |
|
|
contrib, or dedicated caustic photon map. |
| 30 |
|
|
*/ |
| 31 |
|
|
#define shadowRayInPmap(r) ((r) -> crtype & SHADOW && \ |
| 32 |
greg |
2.6 |
(ambounce < 0 || ((r) -> crtype & AMBIENT ? \ |
| 33 |
|
|
photonMapping : causticPhotonMapping))) |
| 34 |
greg |
2.1 |
|
| 35 |
|
|
/* Check if scattered ray spawns a caustic photon */ |
| 36 |
|
|
#define PMAP_CAUSTICRAY(r) ((r) -> rtype & SPECULAR) |
| 37 |
|
|
|
| 38 |
|
|
|
| 39 |
|
|
/* Scattered photon ray types for photonRay() */ |
| 40 |
|
|
#define PMAP_DIFFREFL (REFLECTED | AMBIENT) |
| 41 |
|
|
#define PMAP_DIFFTRANS (REFLECTED | AMBIENT | TRANS) |
| 42 |
|
|
#define PMAP_SPECREFL (REFLECTED | SPECULAR) |
| 43 |
|
|
#define PMAP_SPECTRANS (REFLECTED | SPECULAR | TRANS) |
| 44 |
|
|
#define PMAP_REFRACT (REFRACTED | SPECULAR) |
| 45 |
|
|
#define PMAP_XFER (TRANS) |
| 46 |
|
|
|
| 47 |
|
|
|
| 48 |
|
|
|
| 49 |
|
|
/* Dispatch table for photon scattering functions */ |
| 50 |
|
|
extern int (*photonScatter []) (OBJREC*, RAY*); |
| 51 |
|
|
|
| 52 |
|
|
/* List of antimatter sensor modifier names */ |
| 53 |
|
|
extern char *photonSensorList [MAXSET + 1]; |
| 54 |
|
|
|
| 55 |
|
|
|
| 56 |
|
|
|
| 57 |
|
|
/* Spawn a new photon ray from a previous one; this is effectively a |
| 58 |
|
|
* customised rayorigin(). */ |
| 59 |
|
|
void photonRay (const RAY *rayIn, RAY *rayOut, int rayOutType, |
| 60 |
|
|
COLOR fluxAtten); |
| 61 |
|
|
|
| 62 |
|
|
/* Init photonScatter[] dispatch table with material specific scattering |
| 63 |
|
|
routines */ |
| 64 |
|
|
void initPhotonScatterFuncs (); |
| 65 |
|
|
|
| 66 |
|
|
/* Find antimatter geometry declared as photon sensors */ |
| 67 |
|
|
void getPhotonSensors (char **sensorList); |
| 68 |
|
|
|
| 69 |
|
|
#endif |
