RadiancePmap/pmaprand.c
31fe9c3d121bphotonflow

pmaprand.c
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			#ifndef lint
			static const char RCSid[] = "$Id: pmaprand.c,v 2.6 2017/08/14 21:12:10 rschregle Exp $";
			#endif

			/*
			======================================================================
			Random number generators for photon distribution

			Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
			(c) Fraunhofer Institute for Solar Energy Systems,
			(c) Lucerne University of Applied Sciences and Arts,
			supported by the Swiss National Science Foundation (SNSF, #147053)
			======================================================================

			$Id: pmaprand.c,v 2.6 2017/08/14 21:12:10 rschregle Exp $
			*/



			/*
			Separate RNG states are used for the following sampling domains during
			photon distribution:

			- source partition
			- emission direction
			- emission counter fraction
			- mean free distance in medium
			- scattering direction
			- russian roulette.

			In addition, each photon map also has a local state randState used for
			distribRatio during distribution and for bias compensation during
			gathering.

			The random seed randSeed can be added to each initial state with
			pmapSeed() so the RNGs can be externally seeded if necessary.
			*/

			unsigned short partState [3] = {47717, 5519, 21521},
			emitState [3] = {33997, 59693, 11003},
			cntState [3] = {17077, 4111, 48907},
			mediumState [3] = {25247, 7507, 33797},
			scatterState [3] = {21863, 45191, 5099},
			rouletteState [3] = {10243, 39829, 9433},
			randSeed = 0;