| 1 |
greg |
2.1 |
/* |
| 2 |
|
|
================================================================== |
| 3 |
|
|
Random number generators for photon distribution |
| 4 |
|
|
|
| 5 |
|
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 6 |
|
|
(c) Fraunhofer Institute for Solar Energy Systems, |
| 7 |
|
|
Lucerne University of Applied Sciences & Arts |
| 8 |
|
|
================================================================== |
| 9 |
|
|
|
| 10 |
|
|
$Id: pmaprand.c,v 4.1 2014/01/24 14:54:54 taschreg Exp taschreg $ |
| 11 |
|
|
*/ |
| 12 |
|
|
|
| 13 |
|
|
|
| 14 |
|
|
|
| 15 |
|
|
/* |
| 16 |
|
|
Separate RNG states are used for the following variates during photon |
| 17 |
|
|
distribution: |
| 18 |
|
|
|
| 19 |
|
|
- source partition |
| 20 |
|
|
- emission direction |
| 21 |
|
|
- emission counter fraction |
| 22 |
|
|
- mean free distance in medium |
| 23 |
|
|
- scattering direction |
| 24 |
|
|
- russian roulette. |
| 25 |
|
|
|
| 26 |
|
|
Each photon map also has a local state randState used for distribRatio |
| 27 |
|
|
during distribution and for bias compensation during gathering. |
| 28 |
|
|
|
| 29 |
|
|
The random seed randSeed can added to each initial state with pmapSeed() |
| 30 |
|
|
so the RNGs can be externally seeded if necessary. |
| 31 |
|
|
*/ |
| 32 |
|
|
|
| 33 |
|
|
unsigned short partState [3] = {47717, 5519, 21521}, |
| 34 |
|
|
emitState [3] = {33997, 59693, 11003}, |
| 35 |
|
|
cntState [3] = {17077, 4111, 48907}, |
| 36 |
|
|
mediumState [3] = {25247, 7507, 33797}, |
| 37 |
|
|
scatterState [3] = {21863, 45191, 5099}, |
| 38 |
|
|
rouletteState [3] = {10243, 39829, 9433}, |
| 39 |
|
|
randSeed = 0; |
