#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;