87 |
|
RREAL fromloc[3][3]; /* local BSDF coords to world */ |
88 |
|
double thick; /* surface thickness */ |
89 |
|
COLOR cthru; /* "through" component for MAT_ABSDF */ |
90 |
+ |
COLOR cthru_surr; /* surround for "through" component */ |
91 |
|
SDData *sd; /* loaded BSDF data */ |
92 |
|
COLOR rdiff; /* diffuse reflection */ |
93 |
|
COLOR runsamp; /* BSDF hemispherical reflection */ |
117 |
|
static void |
118 |
|
compute_through(BSDFDAT *ndp) |
119 |
|
{ |
120 |
< |
#define NDIR2CHECK 13 |
120 |
> |
#define NDIR2CHECK 29 |
121 |
|
static const float dir2check[NDIR2CHECK][2] = { |
122 |
< |
{0, 0}, |
123 |
< |
{-0.8, 0}, |
124 |
< |
{0, 0.8}, |
125 |
< |
{0, -0.8}, |
126 |
< |
{0.8, 0}, |
127 |
< |
{-0.8, 0.8}, |
128 |
< |
{-0.8, -0.8}, |
129 |
< |
{0.8, 0.8}, |
130 |
< |
{0.8, -0.8}, |
131 |
< |
{-1.6, 0}, |
131 |
< |
{0, 1.6}, |
132 |
< |
{0, -1.6}, |
133 |
< |
{1.6, 0}, |
122 |
> |
{0, 0}, {-0.6, 0}, {0, 0.6}, |
123 |
> |
{0, -0.6}, {0.6, 0}, {-0.6, 0.6}, |
124 |
> |
{-0.6, -0.6}, {0.6, 0.6}, {0.6, -0.6}, |
125 |
> |
{-1.2, 0}, {0, 1.2}, {0, -1.2}, |
126 |
> |
{1.2, 0}, {-1.2, 1.2}, {-1.2, -1.2}, |
127 |
> |
{1.2, 1.2}, {1.2, -1.2}, {-1.8, 0}, |
128 |
> |
{0, 1.8}, {0, -1.8}, {1.8, 0}, |
129 |
> |
{-1.8, 1.8}, {-1.8, -1.8}, {1.8, 1.8}, |
130 |
> |
{1.8, -1.8}, {-2.4, 0}, {0, 2.4}, |
131 |
> |
{0, -2.4}, {2.4, 0}, |
132 |
|
}; |
133 |
+ |
#define neighbors(i,j) \ |
134 |
+ |
((dir2check[i][0]-dir2check[j][0])*(dir2check[i][0]-dir2check[j][0]) + \ |
135 |
+ |
(dir2check[i][1]-dir2check[j][1])*(dir2check[i][1]-dir2check[j][1]) <= 0.73) |
136 |
|
const double peak_over = 1.5; |
137 |
|
PEAKSAMP psamp[NDIR2CHECK]; |
138 |
|
SDSpectralDF *dfp; |
139 |
|
FVECT pdir; |
140 |
|
double tomega, srchrad; |
141 |
< |
double tomsum; |
142 |
< |
COLOR vpeak; |
143 |
< |
double vypeak, vysum; |
144 |
< |
int i, ns, ntot; |
141 |
> |
double tomsum, tomsurr; |
142 |
> |
COLOR vpeak, vsurr; |
143 |
> |
double vypeak; |
144 |
> |
int i, j, ns; |
145 |
|
SDError ec; |
146 |
|
|
147 |
|
if (ndp->pr->rod > 0) |
154 |
|
if (bright(ndp->pr->pcol) <= FTINY) |
155 |
|
return; /* pattern is black, here */ |
156 |
|
srchrad = sqrt(dfp->minProjSA); /* else evaluate peak */ |
156 |
– |
vysum = 0; |
157 |
|
for (i = 0; i < NDIR2CHECK; i++) { |
158 |
|
SDValue sv; |
159 |
|
psamp[i].tdir[0] = -ndp->vray[0] + dir2check[i][0]*srchrad; |
164 |
|
if (ec) |
165 |
|
goto baderror; |
166 |
|
cvt_sdcolor(psamp[i].vcol, &sv); |
167 |
< |
vysum += psamp[i].vy = sv.cieY; |
167 |
> |
psamp[i].vy = sv.cieY; |
168 |
|
} |
169 |
– |
if (vysum <= FTINY) /* zero neighborhood? */ |
170 |
– |
return; |
169 |
|
qsort(psamp, NDIR2CHECK, sizeof(PEAKSAMP), cmp_psamp); |
170 |
+ |
if (psamp[0].vy <= FTINY) |
171 |
+ |
return; /* zero area */ |
172 |
|
setcolor(vpeak, 0, 0, 0); |
173 |
< |
vypeak = tomsum = 0; /* combine top unique values */ |
174 |
< |
ns = 0; ntot = NDIR2CHECK; |
173 |
> |
setcolor(vsurr, 0, 0, 0); |
174 |
> |
vypeak = tomsum = tomsurr = 0; /* combine top unique values */ |
175 |
> |
ns = 0; |
176 |
|
for (i = 0; i < NDIR2CHECK; i++) { |
177 |
< |
if (i) { |
178 |
< |
if (psamp[i].vy == psamp[i-1].vy) { |
179 |
< |
vysum -= psamp[i].vy; |
180 |
< |
--ntot; |
181 |
< |
continue; /* assume duplicate sample */ |
182 |
< |
} |
182 |
< |
if (vypeak > 8.*psamp[i].vy*ns) |
183 |
< |
continue; /* peak cut-off */ |
184 |
< |
} |
177 |
> |
for (j = i; j--; ) /* check for duplicate sample */ |
178 |
> |
if (psamp[j].vy == psamp[i].vy && neighbors(i,j)) |
179 |
> |
break; |
180 |
> |
if (j >= 0) |
181 |
> |
continue; /* skip duplicate */ |
182 |
> |
|
183 |
|
ec = SDsizeBSDF(&tomega, psamp[i].tdir, ndp->vray, |
184 |
|
SDqueryMin, ndp->sd); |
185 |
|
if (ec) |
186 |
|
goto baderror; |
187 |
< |
if (tomega > 1.5*dfp->minProjSA) { |
188 |
< |
if (!i) return; /* not really a peak? */ |
187 |
> |
/* not really a peak? */ |
188 |
> |
if (tomega > 1.5*dfp->minProjSA || |
189 |
> |
vypeak > 8.*psamp[i].vy*ns) { |
190 |
> |
if (!i) return; /* abort */ |
191 |
> |
scalecolor(psamp[i].vcol, tomega); |
192 |
> |
addcolor(vsurr, psamp[i].vcol); |
193 |
> |
tomsurr += tomega; |
194 |
|
continue; |
195 |
|
} |
196 |
|
scalecolor(psamp[i].vcol, tomega); |
199 |
|
vypeak += psamp[i].vy; |
200 |
|
++ns; |
201 |
|
} |
202 |
< |
if (vypeak*(ntot-ns) < peak_over*(vysum-vypeak)*ns) |
202 |
> |
if (vypeak*tomsurr < peak_over*bright(vsurr)*ns) |
203 |
|
return; /* peak not peaky enough */ |
204 |
< |
if ((vypeak/ns - ndp->sd->tLamb.cieY*(1./PI))*tomsum <= .001) |
204 |
> |
if ((vypeak/ns - (ndp->vray[2] > 0 ? ndp->sd->tLambFront.cieY |
205 |
> |
: ndp->sd->tLambBack.cieY)*(1./PI))*tomsum <= .001) |
206 |
|
return; /* < 0.1% transmission */ |
207 |
|
copycolor(ndp->cthru, vpeak); /* already scaled by omega */ |
208 |
|
multcolor(ndp->cthru, ndp->pr->pcol); /* modify by pattern */ |
209 |
+ |
if (tomsurr > FTINY) { /* surround contribution? */ |
210 |
+ |
scalecolor(vsurr, 1./tomsurr); /* this one is avg. BTDF */ |
211 |
+ |
copycolor(ndp->cthru_surr, vsurr); |
212 |
+ |
multcolor(ndp->cthru_surr, ndp->pr->pcol); |
213 |
+ |
} |
214 |
|
return; |
215 |
|
baderror: |
216 |
|
objerror(ndp->mp, USER, transSDError(ec)); |
217 |
+ |
#undef neighbors |
218 |
|
#undef NDIR2CHECK |
219 |
|
} |
220 |
|
|
263 |
|
return(0); /* all diffuse */ |
264 |
|
sv = ndp->sd->rLambBack; |
265 |
|
break; |
266 |
< |
default: |
266 |
> |
case 1: |
267 |
|
if ((ndp->sd->tf == NULL) & (ndp->sd->tb == NULL)) |
268 |
|
return(0); /* all diffuse */ |
269 |
< |
sv = ndp->sd->tLamb; |
269 |
> |
sv = ndp->sd->tLambFront; |
270 |
|
break; |
271 |
+ |
case 2: |
272 |
+ |
if ((ndp->sd->tf == NULL) & (ndp->sd->tb == NULL)) |
273 |
+ |
return(0); /* all diffuse */ |
274 |
+ |
sv = ndp->sd->tLambBack; |
275 |
+ |
break; |
276 |
|
} |
277 |
|
if (sv.cieY > FTINY) { |
278 |
|
diffY = sv.cieY *= 1./PI; |
292 |
|
((ndp->sd->tb != NULL) ? ndp->sd->tb : ndp->sd->tf) ; |
293 |
|
|
294 |
|
if (dx*dx + dy*dy <= (2.5*4./PI)*(omega + dfp->minProjSA + |
295 |
< |
2.*sqrt(omega*dfp->minProjSA))) |
296 |
< |
return(0); |
295 |
> |
2.*sqrt(omega*dfp->minProjSA))) { |
296 |
> |
if (bright(ndp->cthru_surr) <= FTINY) |
297 |
> |
return(0); |
298 |
> |
copycolor(cval, ndp->cthru_surr); |
299 |
> |
return(1); /* return non-zero surround BTDF */ |
300 |
> |
} |
301 |
|
} |
302 |
|
ec = SDsizeBSDF(&tomega, ndp->vray, vsrc, SDqueryMin, ndp->sd); |
303 |
|
if (ec) |
335 |
|
if (tomega2 < .12*tomega) |
336 |
|
continue; /* not safe to include */ |
337 |
|
cvt_sdcolor(csmp, &sv); |
338 |
< |
|
339 |
< |
if (sf < 2.5*tsr) { /* weight by Y for small sources */ |
338 |
> |
#if 0 |
339 |
> |
if (sf < 2.5*tsr) { /* weight by BSDF for small sources */ |
340 |
|
scalecolor(csmp, sv.cieY); |
341 |
|
wtot += sv.cieY; |
342 |
|
} else |
343 |
< |
wtot += 1.; |
343 |
> |
#endif |
344 |
> |
wtot += 1.; |
345 |
|
addcolor(cval, csmp); |
346 |
|
} |
347 |
|
if (wtot <= FTINY) /* no valid specular samples? */ |
690 |
|
SDfreeCache(nd.sd); |
691 |
|
return(1); |
692 |
|
} |
693 |
< |
/* diffuse reflectance */ |
693 |
> |
/* diffuse components */ |
694 |
|
if (hitfront) { |
695 |
|
cvt_sdcolor(nd.rdiff, &nd.sd->rLambFront); |
696 |
|
if (m->oargs.nfargs >= 3) { |
699 |
|
m->oargs.farg[2]); |
700 |
|
addcolor(nd.rdiff, ctmp); |
701 |
|
} |
702 |
+ |
cvt_sdcolor(nd.tdiff, &nd.sd->tLambFront); |
703 |
|
} else { |
704 |
|
cvt_sdcolor(nd.rdiff, &nd.sd->rLambBack); |
705 |
|
if (m->oargs.nfargs >= 6) { |
708 |
|
m->oargs.farg[5]); |
709 |
|
addcolor(nd.rdiff, ctmp); |
710 |
|
} |
711 |
+ |
cvt_sdcolor(nd.tdiff, &nd.sd->tLambBack); |
712 |
|
} |
713 |
< |
/* diffuse transmittance */ |
692 |
< |
cvt_sdcolor(nd.tdiff, &nd.sd->tLamb); |
693 |
< |
if (m->oargs.nfargs >= 9) { |
713 |
> |
if (m->oargs.nfargs >= 9) { /* add diffuse transmittance? */ |
714 |
|
setcolor(ctmp, m->oargs.farg[6], |
715 |
|
m->oargs.farg[7], |
716 |
|
m->oargs.farg[8]); |
749 |
|
return(1); |
750 |
|
} |
751 |
|
setcolor(nd.cthru, 0, 0, 0); /* consider through component */ |
752 |
+ |
setcolor(nd.cthru_surr, 0, 0, 0); |
753 |
|
if (m->otype == MAT_ABSDF) { |
754 |
|
compute_through(&nd); |
755 |
|
if (r->crtype & SHADOW) { |