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RadiancePmap/pmutil.h
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pmutil.h
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/* RCSid $Id$ */
/*
======================================================================
Auxiliary photon map utilities; stuff that doesn't fit anywhere else!
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",
SNSF #179067, "Light Fields for Spatio-Temporal Glare Assessment")
(c) Tokyo University of Science,
supported by the JSPS Grants-in-Aid for Scientific Research
(KAKENHI JP19KK0115, "Three-Dimensional Light Flow")
======================================================================
$Id$
*/
#ifndef _PMAP_UTIL_H
#define _PMAP_UTIL_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)
/* Photon distribution counter update interval expressed as bitmask;
counters shared among subling subprocesses will only be updated
in multiples of PMAP_CNTUPDATE in order to reduce contention */
#define PMAP_CNTUPDATE 0xffL
void colorNorm (COLOR c);
/* Normalise colour channels to average of 1 */
void cleanUpPmaps (PhotonMap **pmaps);
/* Wrapper to delete all photon maps */
void shmLock (int shmFile, int type);
/* Set/release record lock on shared memory file,
where type is either F_RDLCK, F_WRLCK or F_UNLCK*/
#endif
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