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/* |
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================================================================== |
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Photon map main header |
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Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
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(c) Fraunhofer Institute for Solar Energy Systems, |
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Lucerne University of Applied Sciences & Arts |
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================================================================== |
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$Id: pmap.h,v 4.7 2014/12/01 17:28:40 taschreg Exp $ |
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*/ |
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#ifndef PMAP_H |
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#define PMAP_H |
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#include "pmapparm.h" |
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#include "pmapdata.h" |
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#define min(a, b) ((a) < (b) ? (a) : (b)) |
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#define max(a, b) ((a) > (b) ? (a) : (b)) |
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#define sqr(a) ((a) * (a)) |
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/* Average over colour channels */ |
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#define colorAvg(col) ((col [0] + col [1] + col [2]) / 3) |
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/* Macros to test for enabled photon maps */ |
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#define photonMapping (globalPmap || preCompPmap || \ |
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causticPmap ||contribPmap) |
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#define causticPhotonMapping (causticPmap) |
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#define directPhotonMapping (directPmap) |
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#define volumePhotonMapping (volumePmap) |
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#define contribPhotonMapping (contribPmap && contribPmap -> srcContrib) |
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extern void (*pmapLookup [])(PhotonMap*, RAY*, COLOR); |
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/* Photon map lookup functions per type */ |
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void loadPmaps (PhotonMap **pmaps, const PhotonMapParams *params); |
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/* Load photon and set their respective parameters, checking timestamps |
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* relative to octree for possible staleness */ |
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void savePmaps (const PhotonMap **pmaps, int argc, char **argv); |
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/* Save all defined photon maps with specified command line */ |
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void cleanUpPmaps (PhotonMap **pmaps); |
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/* Trash all photon maps after processing is complete */ |
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void distribPhotons (PhotonMap **pmaps); |
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/* Emit photons from light sources and build photon maps for non-NULL |
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* entries in photon map array */ |
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void tracePhoton (RAY*); |
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/* Follow photon as it bounces around the scene. Analogon to |
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* raytrace(). */ |
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void photonDensity (PhotonMap*, RAY*, COLOR irrad); |
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/* Perform surface density estimate from incoming photon flux at |
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ray's intersection point. Returns irradiance from found photons. */ |
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void photonPreCompDensity (PhotonMap *pmap, RAY *r, COLOR irrad); |
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/* Returns precomputed photon density estimate at ray -> rop. */ |
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void volumePhotonDensity (PhotonMap*, RAY*, COLOR); |
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/* Perform volume density estimate from incoming photon flux at |
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ray's intersection point. Returns irradiance. */ |
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void colorNorm (COLOR); |
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/* Normalise colour channels to average of 1 */ |
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#endif |
