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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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================================================================== |
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Photon map support routines for emission from light sources |
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(c) Lucerne University of Applied Sciences and Arts, |
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supported by the Swiss National Science Foundation (SNSF, #147053) |
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================================================================== |
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$Id$ |
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*/ |
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#include "pmaprand.h" |
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#include "otypes.h" |
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SRCREC *photonPorts = NULL; /* Photon port list */ |
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/* List of photon port modifier names */ |
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char *photonPortList [MAXSET + 1] = {NULL}; |
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/* Photon port objects (with modifiers in photonPortMods) */ |
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SRCREC *photonPorts = NULL; |
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unsigned numPhotonPorts = 0; |
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void (*photonPartition [NUMOTYPE]) (EmissionMap*); |
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void (*photonOrigin [NUMOTYPE]) (EmissionMap*); |
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extern OBJECT ambset []; |
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static int flatPhotonPartition2 (EmissionMap* emap, unsigned long mp, |
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void getPhotonPorts () |
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/* Find geometry declared as photon ports */ |
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void getPhotonPorts (char **portList) |
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/* Find geometry declared as photon ports from modifiers in portList */ |
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{ |
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OBJECT i; |
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OBJREC* obj; |
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OBJREC *obj, *mat; |
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char **lp; |
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/* Check for missing port modifiers */ |
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if (!ambset [0]) |
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error(USER, "no photon ports found"); |
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if (!portList [0]) |
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error(USER, "no photon ports"); |
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for (i = 0; i < nobjects; i++) { |
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obj = objptr(i); |
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mat = findmaterial(obj); |
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if (inset(ambset, obj -> omod)) { |
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/* Add photon port */ |
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photonPorts = (SRCREC*)realloc(photonPorts, |
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(numPhotonPorts + 1) * |
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sizeof(SRCREC)); |
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if (!photonPorts) |
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error(USER, "can't allocate photon ports"); |
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photonPorts [numPhotonPorts].so = obj; |
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photonPorts [numPhotonPorts].sflags = 0; |
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/* Check if object is a surface and NOT a light source (duh) and |
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* resolve its material via any aliases, then check for inclusion in |
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* modifier list */ |
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if (issurface(obj -> otype) && mat && !islight(mat -> otype)) { |
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for (lp = portList; *lp && strcmp(mat -> oname, *lp); lp++); |
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if (!sfun [obj -> otype].of || !sfun[obj -> otype].of -> setsrc) |
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objerror(obj, USER, "illegal photon port"); |
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if (*lp) { |
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/* Add photon port */ |
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photonPorts = (SRCREC*)realloc(photonPorts, |
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(numPhotonPorts + 1) * |
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sizeof(SRCREC)); |
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if (!photonPorts) |
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error(USER, "can't allocate photon ports"); |
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setsource(photonPorts + numPhotonPorts, obj); |
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numPhotonPorts++; |
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photonPorts [numPhotonPorts].so = obj; |
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photonPorts [numPhotonPorts].sflags = 0; |
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if (!sfun [obj -> otype].of || !sfun[obj -> otype].of -> setsrc) |
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objerror(obj, USER, "illegal photon port"); |
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setsource(photonPorts + numPhotonPorts, obj); |
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numPhotonPorts++; |
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} |
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} |
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} |
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if (!numPhotonPorts) |
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error(USER, "no valid photon ports found"); |
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} |
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unsigned i, t, p; |
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double phi, cosTheta, sinTheta, du, dv, dOmega, thetaScale; |
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EmissionSample* sample; |
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const OBJREC* mod = objptr(emap -> src -> so -> omod); |
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const OBJREC* mod = findmaterial(emap -> src -> so); |
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static RAY r; |
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#if 0 |
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static double lastCosNorm = FHUGE; |
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static SRCREC *lastSrc = NULL, *lastPort = NULL; |
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#endif |
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setcolor(emap -> partFlux, 0, 0, 0); |
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photonOrigin [emap -> src -> so -> otype] (emap); |
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cosTheta = DOT(emap -> ws, emap -> wh); |
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#endif |
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/* Need to recompute flux & PDF */ |
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setcolor(emap -> partFlux, 0, 0, 0); |
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emap -> cdf = 0; |
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emap -> numSamples = 0; |
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VCOPY(r.rorg, emap -> photonOrg); |
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VCOPY(r.rop, emap -> photonOrg); |
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r.rmax = FHUGE; |
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r.rmax = 0; |
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for (t = 0; t < emap -> numTheta; t++) { |
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for (p = 0; p < emap -> numPhi; p++) { |
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unsigned long i, lo, hi; |
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const EmissionSample* sample = emap -> samples; |
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RREAL du, dv, cosTheta, cosThetaSqr, sinTheta, phi; |
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const OBJREC* mod = objptr(emap -> src -> so -> omod); |
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const OBJREC* mod = findmaterial(emap -> src -> so); |
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/* Choose a new origin within current partition for every |
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emitted photon to break up clustering artifacts */ |
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photonOrigin [emap -> src -> so -> otype] ((EmissionMap*)emap); |
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/* If we have a local glow source with a maximum radius, then |
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restrict our photon to the specified distance, otherwise we set |
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the limit imposed by photonMaxDist (or no limit if 0) */ |
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if (mod -> otype == MAT_GLOW && !(emap -> src -> sflags & SDISTANT) |
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&& mod -> oargs.farg[3] > FTINY) |
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ray -> rmax = mod -> oargs.farg[3]; |
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else |
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ray -> rmax = photonMaxDist; |
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rayorigin(ray, PRIMARY, NULL, NULL); |
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ray -> rmax = FHUGE; |
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if (!emap -> numSamples) { |
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/* Source is unmodified and has no port, and either local with |
