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#include "pmapdata.h" /* Includes pmapkdt.h */ |
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#include "source.h" |
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#include "otspecial.h" |
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#include "random.h" |
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< |
void kdT_FindPhotons (struct PhotonMap *pmap, const FVECT pos, |
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const FVECT norm) |
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int kdT_FindPhotons (struct PhotonMap *pmap, const FVECT pos, |
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const FVECT norm) |
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{ |
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float p [3], n [3]; |
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/* Photon pos & normal stored at lower precision */ |
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VCOPY(p, pos); |
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VCOPY(n, norm); |
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kdT_FindNearest(pmap, p, n, 1); |
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if (norm) |
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VCOPY(n, norm); |
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kdT_FindNearest(pmap, p, norm ? n : NULL, 1); |
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/* Return success or failure (empty queue => none found) */ |
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return pmap -> squeue.tail ? 0 : -1; |
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} |
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d2 = DOT(dv, dv); |
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if (d2 < pmap -> maxDist2 && |
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DOT(norm, p -> norm) > PMAP_NORM_TOL * 127 * frandom()) { |
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(!norm || DOT(norm, p -> norm) > PMAP_NORM_TOL * 127 * frandom())) { |
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/* Closest photon so far with similar normal. We allow for tolerance |
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* to account for perturbation in the latter; note the photon normal |
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* is coded in the range [-127,127], hence we factor this in */ |
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< |
void kdT_Find1Photon (struct PhotonMap *pmap, const FVECT pos, |
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const FVECT norm, Photon *photon) |
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int kdT_Find1Photon (struct PhotonMap *pmap, const FVECT pos, |
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const FVECT norm, Photon *photon) |
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{ |
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float p [3], n [3]; |
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Photon *pnn; |
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Photon *pnn = NULL; |
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/* Photon pos & normal stored at lower precision */ |
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VCOPY(p, pos); |
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VCOPY(n, norm); |
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kdT_Find1Nearest(pmap, p, n, &pnn, 1); |
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memcpy(photon, pnn, sizeof(Photon)); |
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if (norm) |
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VCOPY(n, norm); |
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kdT_Find1Nearest(pmap, p, norm ? n : NULL, &pnn, 1); |
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if (!pnn) |
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/* No photon found => failed */ |
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return -1; |
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else { |
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/* Copy found photon => successs */ |
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memcpy(photon, pnn, sizeof(Photon)); |
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return 0; |
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} |
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} |
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