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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 interface to RADIANCE ambient calculation |
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PhotonMap *pmap = contribPhotonMapping ? contribPmap |
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: preCompPmap ? preCompPmap |
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: globalPmap; |
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/* Get photon irradiance either via 1 ambient bounce (final |
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* gather) if ambounce > 0, or directly if ambounce < 0. */ |
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if (pmap && (rdepth || ambounce < 0)) { |
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/* Handle precedence in case of multiple photon maps: contrib > caustic */ |
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PhotonMap *pmap = contribPhotonMapping ? contribPmap : causticPmap; |
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/* Get caustic photon density estimate only at primary rays */ |
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if (pmap && (!rdepth || (!globalPmap & !contribPmap & !preCompPmap |
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&& r->crtype & AMBIENT))) { |
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/* Get caustic photon density estimate at primary rays or when |
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* filling in ambient rays that have no global photon map to use */ |
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if (pmap && (!rdepth || !globalPmap & !contribPmap & !preCompPmap)) { |
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/* Temporarily factor ambient value into ray coefficient |
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* (required for contribution photon map) */ |
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copycolor(rcoef, r -> rcoef); |
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multcolor(r -> rcoef, aval); |
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/* Set caustic flag and get photon irradiance via callback */ |
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pmap -> lookupFlags = PMAP_CAUST_BIT; |
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pmap -> lookupCaustic = 1; |
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(pmap -> lookup)(pmap, r, photonIrrad); |
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/* Factor irradiance into ambient value and restore ray coeficient */ |
