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#define MINCOS 0.997 /* minimum dot product for dispersion */ |
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extern COLOR cextinction; /* global coefficient of extinction */ |
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extern double salbedo; /* global scattering albedo */ |
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extern COLOR salbedo; /* global scattering albedo */ |
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static double |
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{ |
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double cos1, cos2, nratio; |
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COLOR ctrans; |
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double talb; |
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COLOR talb; |
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double mabsorp; |
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double refl, trans; |
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FVECT dnorm; |
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setcolor(r->cext, -mylog(m->oargs.farg[0]*colval(r->pcol,RED)), |
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-mylog(m->oargs.farg[1]*colval(r->pcol,GRN)), |
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-mylog(m->oargs.farg[2]*colval(r->pcol,BLU))); |
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r->albedo = 0.; |
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setcolor(r->albedo, 0., 0., 0.); |
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r->gecc = 0.; |
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if (m->otype == MAT_INTERFACE) { |
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setcolor(ctrans, |
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-mylog(m->oargs.farg[4]*colval(r->pcol,RED)), |
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-mylog(m->oargs.farg[5]*colval(r->pcol,GRN)), |
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-mylog(m->oargs.farg[6]*colval(r->pcol,BLU))); |
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talb = 0.; |
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setcolor(talb, 0., 0., 0.); |
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} else { |
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copycolor(ctrans, cextinction); |
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talb = salbedo; |
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copycolor(talb, salbedo); |
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} |
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} else { /* outside */ |
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nratio = 1.0 / nratio; |
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setcolor(ctrans, -mylog(m->oargs.farg[0]*colval(r->pcol,RED)), |
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-mylog(m->oargs.farg[1]*colval(r->pcol,GRN)), |
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-mylog(m->oargs.farg[2]*colval(r->pcol,BLU))); |
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< |
talb = 0.; |
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setcolor(talb, 0., 0., 0.); |
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if (m->otype == MAT_INTERFACE) { |
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setcolor(r->cext, |
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-mylog(m->oargs.farg[4]*colval(r->pcol,RED)), |
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-mylog(m->oargs.farg[5]*colval(r->pcol,GRN)), |
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-mylog(m->oargs.farg[6]*colval(r->pcol,BLU))); |
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r->albedo = 0.; |
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> |
setcolor(r->albedo, 0., 0., 0.); |
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r->gecc = 0.; |
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} |
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} |
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#endif |
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{ |
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copycolor(p.cext, ctrans); |
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p.albedo = talb; |
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copycolor(p.albedo, talb); |
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rayvalue(&p); |
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scalecolor(p.rcol, trans); |
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addcolor(r->rcol, p.rcol); |