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RadiancePmap/pmap.h
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pmap.h
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/* RCSid $Id: pmap.h,v 2.9 2018/01/24 19:39:05 rschregle Exp $ */
/*
======================================================================
Photon map main header
Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
(c) Fraunhofer Institute for Solar Energy Systems,
supported by the German Research Foundation
(DFG LU-204/10-2, "Fassadenintegrierte Regelsysteme" (FARESYS))
(c) Lucerne University of Applied Sciences and Arts,
supported by the Swiss National Science Foundation
(SNSF #147053, "Daylight Redirecting Components")
(c) Tokyo University of Science,
supported by the JSPS Grants-in-Aid for Scientific Research
(KAKENHI JP19KK0115, "Three-Dimensional Light Flow")
======================================================================
$Id: pmap.h,v 2.9 2018/01/24 19:39:05 rschregle Exp $
TODO:
-- Precomp. contrib photons
*/
#ifndef PMAP_H
#define PMAP_H
#ifndef NIX
#if defined(_WIN32) || defined(_WIN64)
#define NIX 0
#else
#define NIX 1
#endif
#endif
#include "pmapparm.h"
#include "pmapdata.h"
#ifndef min
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef max
#define max(a, b) ((a) > (b) ? (a) : (b))
#endif
#define sqr(a) ((a) * (a))
/* Average over colour channels */
#define colorAvg(col) ((col [0] + col [1] + col [2]) / 3)
/* Macros to test for enabled photon maps */
#define photonMapping (globalPmap || preCompPmap || \
causticPmap || contribPmap)
#define causticPhotonMapping (causticPmap)
#ifdef PMAP_PHOTONFLOW
/* Photon flow also accounts for direct component */
#define directPhotonMapping (directPmap || photonFlow)
#else
#define directPhotonMapping (directPmap)
#endif
#define volumePhotonMapping (volumePmap)
/* #define contribPhotonMapping (contribPmap && contribPmap -> srcContrib)
*/
#define contribPhotonMapping (contribPmap)
extern void (*pmapLookup [])(PhotonMap*, RAY*, COLOR);
/* Photon map lookup functions per type */
void loadPmaps (PhotonMap **pmaps, const PhotonMapParams *params);
/* Load photon and set their respective parameters, checking timestamps
* relative to octree for possible staleness */
void savePmaps (const PhotonMap **pmaps, int argc, char **argv);
/* Save all defined photon maps with specified command line */
void cleanUpPmaps (PhotonMap **pmaps);
/* Trash all photon maps after processing is complete */
void distribPhotons (PhotonMap **pmaps, unsigned numProc);
/* Emit photons from light sources and build photon maps for non-NULL
* entries in photon map array */
void tracePhoton (RAY*);
/* Follow photon as it bounces around the scene. Analogon to
* raytrace(). */
void photonDensity (PhotonMap*, RAY*, COLOR irrad);
/* Perform surface density estimate from incoming photon flux at
ray's intersection point. Returns irradiance from found photons. */
void photonPreCompDensity (PhotonMap *pmap, RAY *r, COLOR irrad);
/* Returns precomputed photon density estimate at ray -> rop. */
void volumePhotonDensity (PhotonMap*, RAY*, COLOR);
/* Perform volume density estimate from incoming photon flux at
ray's intersection point. Returns irradiance. */
void colorNorm (COLOR);
/* Normalise colour channels to average of 1 */
#endif
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