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RadiancePmap/pmapcontrib.h
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pmapcontrib.h
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/* RCSid $Id: pmapcontrib.h,v 2.5 2016/05/17 17:39:47 rschregle Exp $ */
/*
=========================================================================
Photon map routines for precomputed light source contributions; these
routines interface to mkpmap and rcontrib.
Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
(c) Lucerne University of Applied Sciences and Arts,
supported by the Swiss National Science Foundation
(SNSF #147053, "Daylight Redirecting Components",
SNSF #179067, "Light Fields for Spatio-Temporal Glare Assessment")
=========================================================================
$Id: pmapcontrib.h,v 2.5 2016/05/17 17:39:47 rschregle Exp $
*/
#ifndef PMAPCONTRIB_H
#define PMAPCONTRIB_H
#include "pmapdata.h"
#ifndef MAXMODLIST
#include "rcontrib.h"
#endif
/* Filename templates specific to precomputed contrib photon map:
-- Binning parameters for rcontrib
-- Wavelet compressed contributions (per modifier) */
/* #define PMAP_CONTRIB_PARAMSUFFIX "%s.rc" */
#define PMAP_CONTRIB_WAVELETSUFFIX "%s-%s.wvl"
typedef struct {
/* Contribution tagged by associated bin;
expanded representation of below */
DCOLOR contrib;
unsigned bin;
} PmapBinnedContrib;
typedef union {
struct {
/* Compressed RGBE representaton of the above for normalised binned
contributions and wavelet coefficients, consisting of a 4-bit
mantissa + sign per RGB, a common 5-bit exponent, and a 12-bit
bin number. */
char r : 5;
char g : 5;
char b : 5;
char e : 5;
int16 bin: 12;
};
uint32 rgbeBin;
} PmapRGBEBin;
MODCONT *addSourceModifier(
LUTAB *srcContrib, unsigned *numSrcContrib, char *mod,
char *binParm, char *binVal, int binCnt
);
/* Add light source modifier mod to contribution lookup table
srcContribs, and update numSrcContrib. Return initialised
contribution data for this modifier. */
void addSourceModfile(
LUTAB *srcContrib, unsigned *numSrcContrib, char *modFile,
char *binParm, char *binVal, int binCnt
);
/* Add light source modifiers from file modFile to contribution lookup
* table srcContribs, and update numSrcContrib. */
void initPmapContrib (LUTAB *srcContrib);
/* Set up photon map contributions (interface to rcmain.c) */
void distribPhotonContrib (
PhotonMap *pmap, LUTAB *srcContrib, unsigned numSrcContrib,
unsigned numProc
);
/* Emit photons with binned light source contributions, precompute their
contributions and build photon map */
void photonContrib (PhotonMap *pmap, RAY *ray, COLOR irrad);
/* Accumulate light source contributions in pmap -> srcMods from
* photons, and return cumulative irradiance from density estimate */
#endif
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