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#include "pmapmat.h" |
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/* |
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* Arguments to this material include optional diffuse colors. |
20 |
> |
* Arguments to this material include optional diffuse colors. |
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* String arguments include the BSDF and function files. |
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* For the MAT_BSDF type, a non-zero thickness causes the useful behavior |
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* of translating transmitted rays this distance beneath the surface |
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RREAL fromloc[3][3]; /* local BSDF coords to world */ |
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double thick; /* surface thickness */ |
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COLOR cthru; /* "through" component for MAT_ABSDF */ |
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COLOR cthru_surr; /* surround for "through" component */ |
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SDData *sd; /* loaded BSDF data */ |
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COLOR rdiff; /* diffuse reflection */ |
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COLOR runsamp; /* BSDF hemispherical reflection */ |
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{1.8, -1.8}, {-2.4, 0}, {0, 2.4}, |
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{0, -2.4}, {2.4, 0}, |
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}; |
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const double peak_over = 1.5; |
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PEAKSAMP psamp[NDIR2CHECK]; |
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SDSpectralDF *dfp; |
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FVECT pdir; |
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double tomega, srchrad; |
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double tomsum; |
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COLOR vpeak; |
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double vypeak, vysum; |
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int i, ns, ntot; |
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double tomsum, tomsurr; |
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COLOR vpeak, vsurr; |
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double vypeak; |
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int i, ns; |
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SDError ec; |
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if (ndp->pr->rod > 0) |
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if (bright(ndp->pr->pcol) <= FTINY) |
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return; /* pattern is black, here */ |
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srchrad = sqrt(dfp->minProjSA); /* else evaluate peak */ |
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vysum = 0; |
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for (i = 0; i < NDIR2CHECK; i++) { |
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SDValue sv; |
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psamp[i].tdir[0] = -ndp->vray[0] + dir2check[i][0]*srchrad; |
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if (ec) |
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goto baderror; |
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cvt_sdcolor(psamp[i].vcol, &sv); |
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vysum += psamp[i].vy = sv.cieY; |
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psamp[i].vy = sv.cieY; |
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} |
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if (vysum <= FTINY) /* zero neighborhood? */ |
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return; |
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qsort(psamp, NDIR2CHECK, sizeof(PEAKSAMP), cmp_psamp); |
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if (psamp[0].vy <= FTINY) |
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return; /* zero BTDF here */ |
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setcolor(vpeak, 0, 0, 0); |
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vypeak = tomsum = 0; /* combine top unique values */ |
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ns = 0; ntot = NDIR2CHECK; |
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setcolor(vsurr, 0, 0, 0); |
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vypeak = tomsum = tomsurr = 0; /* combine top unique values */ |
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ns = 0; |
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for (i = 0; i < NDIR2CHECK; i++) { |
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if (i) { |
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if (psamp[i].vy == psamp[i-1].vy) { |
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vysum -= psamp[i].vy; |
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--ntot; |
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continue; /* assume duplicate sample */ |
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} |
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if (vypeak > 8.*psamp[i].vy*ns) |
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continue; /* peak cut-off */ |
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} |
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if (i && psamp[i].vy == psamp[i-1].vy) |
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continue; /* assume duplicate sample */ |
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|
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ec = SDsizeBSDF(&tomega, psamp[i].tdir, ndp->vray, |
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SDqueryMin, ndp->sd); |
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if (ec) |
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goto baderror; |
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if (tomega > 1.5*dfp->minProjSA) { |
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if (!i) return; /* not really a peak? */ |
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> |
|
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scalecolor(psamp[i].vcol, tomega); |
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/* not part of peak? */ |
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if (tomega > 1.5*dfp->minProjSA || |
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vypeak > 8.*psamp[i].vy*ns) { |
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if (!i) return; /* abort */ |
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addcolor(vsurr, psamp[i].vcol); |
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tomsurr += tomega; |
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continue; |
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} |
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scalecolor(psamp[i].vcol, tomega); |
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addcolor(vpeak, psamp[i].vcol); |
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tomsum += tomega; |
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vypeak += psamp[i].vy; |
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++ns; |
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} |
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if (vypeak*(ntot-ns) < peak_over*(vysum-vypeak)*ns) |
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return; /* peak not peaky enough */ |
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if ((vypeak/ns - ndp->sd->tLamb.cieY*(1./PI))*tomsum <= .001) |
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return; /* < 0.1% transmission */ |
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if (tomsurr <= FTINY) /* no surround implies no peak */ |
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return; |
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if ((vypeak/ns - (ndp->vray[2] > 0 ? ndp->sd->tLambFront.cieY |
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: ndp->sd->tLambBack.cieY)*(1./PI))*tomsum < .0005) |
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return; /* < 0.05% transmission */ |
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copycolor(ndp->cthru, vpeak); /* already scaled by omega */ |
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multcolor(ndp->cthru, ndp->pr->pcol); /* modify by pattern */ |
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scalecolor(vsurr, 1./tomsurr); /* surround is avg. BTDF */ |
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copycolor(ndp->cthru_surr, vsurr); |
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multcolor(ndp->cthru_surr, ndp->pr->pcol); |
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return; |
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baderror: |
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objerror(ndp->mp, USER, transSDError(ec)); |
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return(0); /* all diffuse */ |
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sv = ndp->sd->rLambBack; |
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break; |
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< |
default: |
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> |
case 1: |
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if ((ndp->sd->tf == NULL) & (ndp->sd->tb == NULL)) |
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return(0); /* all diffuse */ |
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< |
sv = ndp->sd->tLamb; |
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> |
sv = ndp->sd->tLambFront; |
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break; |
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case 2: |
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if ((ndp->sd->tf == NULL) & (ndp->sd->tb == NULL)) |
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return(0); /* all diffuse */ |
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sv = ndp->sd->tLambBack; |
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break; |
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} |
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if (sv.cieY > FTINY) { |
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diffY = sv.cieY *= 1./PI; |
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((ndp->sd->tb != NULL) ? ndp->sd->tb : ndp->sd->tf) ; |
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if (dx*dx + dy*dy <= (2.5*4./PI)*(omega + dfp->minProjSA + |
285 |
< |
2.*sqrt(omega*dfp->minProjSA))) |
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< |
return(0); |
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> |
2.*sqrt(omega*dfp->minProjSA))) { |
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> |
if (bright(ndp->cthru_surr) <= FTINY) |
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> |
return(0); |
288 |
> |
copycolor(cval, ndp->cthru_surr); |
289 |
> |
return(1); /* return non-zero surround BTDF */ |
290 |
> |
} |
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} |
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ec = SDsizeBSDF(&tomega, ndp->vray, vsrc, SDqueryMin, ndp->sd); |
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if (ec) |
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SDfreeCache(nd.sd); |
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return(1); |
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} |
683 |
< |
/* diffuse reflectance */ |
683 |
> |
/* diffuse components */ |
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if (hitfront) { |
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cvt_sdcolor(nd.rdiff, &nd.sd->rLambFront); |
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if (m->oargs.nfargs >= 3) { |
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m->oargs.farg[2]); |
690 |
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addcolor(nd.rdiff, ctmp); |
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} |
692 |
+ |
cvt_sdcolor(nd.tdiff, &nd.sd->tLambFront); |
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} else { |
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cvt_sdcolor(nd.rdiff, &nd.sd->rLambBack); |
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if (m->oargs.nfargs >= 6) { |
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m->oargs.farg[5]); |
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addcolor(nd.rdiff, ctmp); |
700 |
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} |
701 |
+ |
cvt_sdcolor(nd.tdiff, &nd.sd->tLambBack); |
702 |
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} |
703 |
< |
/* diffuse transmittance */ |
690 |
< |
cvt_sdcolor(nd.tdiff, &nd.sd->tLamb); |
691 |
< |
if (m->oargs.nfargs >= 9) { |
703 |
> |
if (m->oargs.nfargs >= 9) { /* add diffuse transmittance? */ |
704 |
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setcolor(ctmp, m->oargs.farg[6], |
705 |
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m->oargs.farg[7], |
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m->oargs.farg[8]); |
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return(1); |
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} |
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setcolor(nd.cthru, 0, 0, 0); /* consider through component */ |
742 |
+ |
setcolor(nd.cthru_surr, 0, 0, 0); |
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if (m->otype == MAT_ABSDF) { |
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compute_through(&nd); |
745 |
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if (r->crtype & SHADOW) { |