| 8 |
|
#include "copyright.h" |
| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
+ |
#include "otypes.h" |
| 12 |
|
#include "ambient.h" |
| 13 |
|
#include "source.h" |
| 14 |
|
#include "func.h" |
| 19 |
|
/* |
| 20 |
|
* Arguments to this material include optional diffuse colors. |
| 21 |
|
* String arguments include the BSDF and function files. |
| 22 |
< |
* A non-zero thickness causes the strange but useful behavior |
| 22 |
> |
* For the MAT_BSDF type, a non-zero thickness causes the useful behavior |
| 23 |
|
* of translating transmitted rays this distance beneath the surface |
| 24 |
|
* (opposite the surface normal) to bypass any intervening geometry. |
| 25 |
|
* Translation only affects scattered, non-source-directed samples. |
| 36 |
|
* hides geometry in front of the surface when rays hit from behind, |
| 37 |
|
* and applies only the transmission and backside reflectance properties. |
| 38 |
|
* Reflection is ignored on the hidden side, as those rays pass through. |
| 39 |
< |
* When thickness is set to zero, shadow rays will be blocked unless |
| 40 |
< |
* a BTDF has a strong "through" component in the source direction. |
| 39 |
> |
* For the MAT_ABSDF type, we check for a strong "through" component. |
| 40 |
> |
* Such a component will cause direct rays to pass through unscattered. |
| 41 |
|
* A separate test prevents over-counting by dropping samples that are |
| 42 |
|
* too close to this "through" direction. BSDFs with such a through direction |
| 43 |
|
* will also have a view component, meaning they are somewhat see-through. |
| 44 |
+ |
* A MAT_BSDF type with zero thickness behaves the same as a MAT_ABSDF |
| 45 |
+ |
* type with no strong through component. |
| 46 |
|
* The "up" vector for the BSDF is given by three variables, defined |
| 47 |
|
* (along with the thickness) by the named function file, or '.' if none. |
| 48 |
|
* Together with the surface normal, this defines the local coordinate |
| 55 |
|
* not multiplied. However, patterns affect this material as a multiplier |
| 56 |
|
* on everything except non-diffuse reflection. |
| 57 |
|
* |
| 58 |
+ |
* Arguments for MAT_ABSDF are: |
| 59 |
+ |
* 5+ BSDFfile ux uy uz funcfile transform |
| 60 |
+ |
* 0 |
| 61 |
+ |
* 0|3|6|9 rdf gdf bdf |
| 62 |
+ |
* rdb gdb bdb |
| 63 |
+ |
* rdt gdt bdt |
| 64 |
+ |
* |
| 65 |
|
* Arguments for MAT_BSDF are: |
| 66 |
|
* 6+ thick BSDFfile ux uy uz funcfile transform |
| 67 |
|
* 0 |
| 86 |
|
RREAL toloc[3][3]; /* world to local BSDF coords */ |
| 87 |
|
RREAL fromloc[3][3]; /* local BSDF coords to world */ |
| 88 |
|
double thick; /* surface thickness */ |
| 89 |
< |
COLOR cthru; /* "through" component multiplier */ |
| 89 |
> |
SCOLOR cthru; /* "through" component for MAT_ABSDF */ |
| 90 |
> |
SCOLOR cthru_surr; /* surround for "through" component */ |
| 91 |
|
SDData *sd; /* loaded BSDF data */ |
| 92 |
< |
COLOR rdiff; /* diffuse reflection */ |
| 93 |
< |
COLOR runsamp; /* BSDF hemispherical reflection */ |
| 94 |
< |
COLOR tdiff; /* diffuse transmission */ |
| 95 |
< |
COLOR tunsamp; /* BSDF hemispherical transmission */ |
| 92 |
> |
SCOLOR rdiff; /* diffuse reflection */ |
| 93 |
> |
SCOLOR runsamp; /* BSDF hemispherical reflection */ |
| 94 |
> |
SCOLOR tdiff; /* diffuse transmission */ |
| 95 |
> |
SCOLOR tunsamp; /* BSDF hemispherical transmission */ |
| 96 |
|
} BSDFDAT; /* BSDF material data */ |
| 97 |
|
|
| 98 |
< |
#define cvt_sdcolor(cv, svp) ccy2rgb(&(svp)->spec, (svp)->cieY, cv) |
| 98 |
> |
#define cvt_sdcolor(scv, svp) ccy2scolor(&(svp)->spec, (svp)->cieY, scv) |
| 99 |
|
|
| 100 |
< |
/* Compute "through" component color */ |
| 100 |
> |
typedef struct { |
| 101 |
> |
double vy; /* brightness (for sorting) */ |
| 102 |
> |
FVECT tdir; /* through sample direction (normalized) */ |
| 103 |
> |
SCOLOR vcol; /* BTDF color */ |
| 104 |
> |
} PEAKSAMP; /* BTDF peak sample */ |
| 105 |
> |
|
| 106 |
> |
/* Comparison function to put near-peak values in descending order */ |
| 107 |
> |
static int |
| 108 |
> |
cmp_psamp(const void *p1, const void *p2) |
| 109 |
> |
{ |
| 110 |
> |
double diff = (*(const PEAKSAMP *)p1).vy - (*(const PEAKSAMP *)p2).vy; |
| 111 |
> |
if (diff > 0) return(-1); |
| 112 |
> |
if (diff < 0) return(1); |
| 113 |
> |
return(0); |
| 114 |
> |
} |
| 115 |
> |
|
| 116 |
> |
/* Compute "through" component color for MAT_ABSDF */ |
| 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}, |
| 105 |
< |
{0, 1.6}, |
| 106 |
< |
{0, -1.6}, |
| 107 |
< |
{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 |
< |
const double peak_over = 1.5; |
| 133 |
> |
PEAKSAMP psamp[NDIR2CHECK]; |
| 134 |
|
SDSpectralDF *dfp; |
| 135 |
|
FVECT pdir; |
| 136 |
|
double tomega, srchrad; |
| 137 |
< |
COLOR vpeak, vsum; |
| 138 |
< |
int i; |
| 137 |
> |
double tomsum, tomsurr; |
| 138 |
> |
SCOLOR vpeak, vsurr, btdiff; |
| 139 |
> |
double vypeak; |
| 140 |
> |
int i, ns; |
| 141 |
|
SDError ec; |
| 142 |
|
|
| 117 |
– |
setcolor(ndp->cthru, 0, 0, 0); /* starting assumption */ |
| 118 |
– |
|
| 143 |
|
if (ndp->pr->rod > 0) |
| 144 |
|
dfp = (ndp->sd->tf != NULL) ? ndp->sd->tf : ndp->sd->tb; |
| 145 |
|
else |
| 147 |
|
|
| 148 |
|
if (dfp == NULL) |
| 149 |
|
return; /* no specular transmission */ |
| 150 |
< |
if (bright(ndp->pr->pcol) <= FTINY) |
| 150 |
> |
if (sintens(ndp->pr->pcol) <= FTINY) |
| 151 |
|
return; /* pattern is black, here */ |
| 152 |
< |
srchrad = sqrt(dfp->minProjSA); /* else search for peak */ |
| 129 |
< |
setcolor(vpeak, 0, 0, 0); |
| 130 |
< |
setcolor(vsum, 0, 0, 0); |
| 131 |
< |
pdir[2] = 0.0; |
| 152 |
> |
srchrad = sqrt(dfp->minProjSA); /* else evaluate peak */ |
| 153 |
|
for (i = 0; i < NDIR2CHECK; i++) { |
| 133 |
– |
FVECT tdir; |
| 154 |
|
SDValue sv; |
| 155 |
< |
COLOR vcol; |
| 156 |
< |
tdir[0] = -ndp->vray[0] + dir2check[i][0]*srchrad; |
| 157 |
< |
tdir[1] = -ndp->vray[1] + dir2check[i][1]*srchrad; |
| 158 |
< |
tdir[2] = -ndp->vray[2]; |
| 159 |
< |
normalize(tdir); |
| 140 |
< |
ec = SDevalBSDF(&sv, tdir, ndp->vray, ndp->sd); |
| 155 |
> |
psamp[i].tdir[0] = -ndp->vray[0] + dir2check[i][0]*srchrad; |
| 156 |
> |
psamp[i].tdir[1] = -ndp->vray[1] + dir2check[i][1]*srchrad; |
| 157 |
> |
psamp[i].tdir[2] = -ndp->vray[2]; |
| 158 |
> |
normalize(psamp[i].tdir); |
| 159 |
> |
ec = SDevalBSDF(&sv, ndp->vray, psamp[i].tdir, ndp->sd); |
| 160 |
|
if (ec) |
| 161 |
|
goto baderror; |
| 162 |
< |
cvt_sdcolor(vcol, &sv); |
| 163 |
< |
addcolor(vsum, vcol); |
| 164 |
< |
if (sv.cieY > bright(vpeak)) { |
| 165 |
< |
copycolor(vpeak, vcol); |
| 166 |
< |
VCOPY(pdir, tdir); |
| 162 |
> |
cvt_sdcolor(psamp[i].vcol, &sv); |
| 163 |
> |
psamp[i].vy = sv.cieY; |
| 164 |
> |
} |
| 165 |
> |
qsort(psamp, NDIR2CHECK, sizeof(PEAKSAMP), cmp_psamp); |
| 166 |
> |
if (psamp[0].vy <= FTINY) |
| 167 |
> |
return; /* zero BTDF here */ |
| 168 |
> |
scolorblack(vpeak); |
| 169 |
> |
scolorblack(vsurr); |
| 170 |
> |
vypeak = tomsum = tomsurr = 0; /* combine top unique values */ |
| 171 |
> |
ns = 0; |
| 172 |
> |
for (i = 0; i < NDIR2CHECK; i++) { |
| 173 |
> |
if (i && psamp[i].vy == psamp[i-1].vy) |
| 174 |
> |
continue; /* assume duplicate sample */ |
| 175 |
> |
|
| 176 |
> |
ec = SDsizeBSDF(&tomega, ndp->vray, psamp[i].tdir, |
| 177 |
> |
SDqueryMin, ndp->sd); |
| 178 |
> |
if (ec) |
| 179 |
> |
goto baderror; |
| 180 |
> |
|
| 181 |
> |
scalescolor(psamp[i].vcol, tomega); |
| 182 |
> |
/* not part of peak? */ |
| 183 |
> |
if (tomega > 1.5*dfp->minProjSA || |
| 184 |
> |
vypeak > 8.*psamp[i].vy*ns) { |
| 185 |
> |
if (!i) return; /* abort */ |
| 186 |
> |
saddscolor(vsurr, psamp[i].vcol); |
| 187 |
> |
tomsurr += tomega; |
| 188 |
> |
continue; |
| 189 |
|
} |
| 190 |
+ |
saddscolor(vpeak, psamp[i].vcol); |
| 191 |
+ |
tomsum += tomega; |
| 192 |
+ |
vypeak += psamp[i].vy; |
| 193 |
+ |
++ns; |
| 194 |
|
} |
| 195 |
< |
if (pdir[2] == 0.0) |
| 196 |
< |
return; /* zero neighborhood */ |
| 197 |
< |
ec = SDsizeBSDF(&tomega, pdir, ndp->vray, SDqueryMin, ndp->sd); |
| 198 |
< |
if (ec) |
| 199 |
< |
goto baderror; |
| 200 |
< |
if (tomega > 1.5*dfp->minProjSA) |
| 201 |
< |
return; /* not really a peak? */ |
| 202 |
< |
tomega /= fabs(pdir[2]); /* remove cosine factor */ |
| 203 |
< |
if ((bright(vpeak) - ndp->sd->tLamb.cieY*(1./PI))*tomega <= .001) |
| 204 |
< |
return; /* < 0.1% transmission */ |
| 205 |
< |
for (i = 3; i--; ) /* remove peak from average */ |
| 206 |
< |
colval(vsum,i) -= colval(vpeak,i); |
| 207 |
< |
if (peak_over*bright(vsum) >= (NDIR2CHECK-1)*bright(vpeak)) |
| 208 |
< |
return; /* not peaky enough */ |
| 209 |
< |
copycolor(ndp->cthru, vpeak); /* else use it */ |
| 210 |
< |
scalecolor(ndp->cthru, tomega); |
| 211 |
< |
multcolor(ndp->cthru, ndp->pr->pcol); /* modify by pattern */ |
| 195 |
> |
if (tomsurr < 0.2*tomsum) /* insufficient surround? */ |
| 196 |
> |
return; |
| 197 |
> |
scalescolor(vsurr, 1./tomsurr); /* surround is avg. BTDF */ |
| 198 |
> |
if (ndp->vray[2] > 0) /* get diffuse BTDF */ |
| 199 |
> |
cvt_sdcolor(btdiff, &ndp->sd->tLambFront); |
| 200 |
> |
else |
| 201 |
> |
cvt_sdcolor(btdiff, &ndp->sd->tLambBack); |
| 202 |
> |
scalescolor(btdiff, (1./PI)); |
| 203 |
> |
for (i = NCSAMP; i--; ) { /* remove diffuse contrib. */ |
| 204 |
> |
if ((vpeak[i] -= tomsum*btdiff[i]) < 0) |
| 205 |
> |
vpeak[i] = 0; |
| 206 |
> |
if ((vsurr[i] -= btdiff[i]) < 0) |
| 207 |
> |
vsurr[i] = 0; |
| 208 |
> |
} |
| 209 |
> |
if (pbright(vpeak) < .0005) /* < 0.05% specular? */ |
| 210 |
> |
return; |
| 211 |
> |
smultscolor(vsurr, ndp->pr->pcol); /* modify by pattern */ |
| 212 |
> |
smultscolor(vpeak, ndp->pr->pcol); |
| 213 |
> |
copyscolor(ndp->cthru_surr, vsurr); |
| 214 |
> |
copyscolor(ndp->cthru, vpeak); |
| 215 |
|
return; |
| 216 |
|
baderror: |
| 217 |
|
objerror(ndp->mp, USER, transSDError(ec)); |
| 234 |
|
|
| 235 |
|
/* Get BSDF specular for direct component, returning true if OK to proceed */ |
| 236 |
|
static int |
| 237 |
< |
direct_specular_OK(COLOR cval, FVECT ldir, double omega, BSDFDAT *ndp) |
| 237 |
> |
direct_specular_OK(SCOLOR scval, FVECT ldir, double omega, BSDFDAT *ndp) |
| 238 |
|
{ |
| 239 |
< |
int nsamp; |
| 240 |
< |
double wtot = 0; |
| 241 |
< |
FVECT vsrc, vsmp, vjit; |
| 239 |
> |
int nsamp = 1; |
| 240 |
> |
int scnt = 0; |
| 241 |
> |
FVECT vsrc, vjit; |
| 242 |
|
double tomega, tomega2; |
| 243 |
< |
double sf, tsr, sd[2]; |
| 244 |
< |
COLOR csmp, cdiff; |
| 243 |
> |
double tsr, sd[2]; |
| 244 |
> |
SCOLOR csmp, cdiff; |
| 245 |
|
double diffY; |
| 246 |
|
SDValue sv; |
| 247 |
|
SDError ec; |
| 248 |
|
int i; |
| 249 |
|
/* in case we fail */ |
| 250 |
< |
setcolor(cval, 0, 0, 0); |
| 250 |
> |
scolorblack(scval); |
| 251 |
|
/* transform source direction */ |
| 252 |
|
if (SDmapDir(vsrc, ndp->toloc, ldir) != SDEnone) |
| 253 |
|
return(0); |
| 254 |
+ |
/* check indirect over-counting */ |
| 255 |
+ |
if ((vsrc[2] > 0) ^ (ndp->vray[2] > 0) && sintens(ndp->cthru) > FTINY) { |
| 256 |
+ |
double dx = vsrc[0] + ndp->vray[0]; |
| 257 |
+ |
double dy = vsrc[1] + ndp->vray[1]; |
| 258 |
+ |
SDSpectralDF *dfp = (ndp->pr->rod > 0) ? |
| 259 |
+ |
((ndp->sd->tf != NULL) ? ndp->sd->tf : ndp->sd->tb) : |
| 260 |
+ |
((ndp->sd->tb != NULL) ? ndp->sd->tb : ndp->sd->tf) ; |
| 261 |
+ |
|
| 262 |
+ |
tomega = omega*fabs(vsrc[2]); |
| 263 |
+ |
if (dx*dx + dy*dy <= (2.5*4./PI)*(tomega + dfp->minProjSA + |
| 264 |
+ |
2.*sqrt(tomega*dfp->minProjSA))) { |
| 265 |
+ |
if (sintens(ndp->cthru_surr) <= FTINY) |
| 266 |
+ |
return(0); |
| 267 |
+ |
copyscolor(scval, ndp->cthru_surr); |
| 268 |
+ |
return(1); /* return non-zero surround BTDF */ |
| 269 |
+ |
} |
| 270 |
+ |
} |
| 271 |
|
/* will discount diffuse portion */ |
| 272 |
|
switch ((vsrc[2] > 0)<<1 | (ndp->vray[2] > 0)) { |
| 273 |
|
case 3: |
| 280 |
|
return(0); /* all diffuse */ |
| 281 |
|
sv = ndp->sd->rLambBack; |
| 282 |
|
break; |
| 283 |
< |
default: |
| 283 |
> |
case 1: |
| 284 |
|
if ((ndp->sd->tf == NULL) & (ndp->sd->tb == NULL)) |
| 285 |
|
return(0); /* all diffuse */ |
| 286 |
< |
sv = ndp->sd->tLamb; |
| 286 |
> |
sv = ndp->sd->tLambFront; |
| 287 |
|
break; |
| 288 |
+ |
case 2: |
| 289 |
+ |
if ((ndp->sd->tf == NULL) & (ndp->sd->tb == NULL)) |
| 290 |
+ |
return(0); /* all diffuse */ |
| 291 |
+ |
sv = ndp->sd->tLambBack; |
| 292 |
+ |
break; |
| 293 |
|
} |
| 294 |
|
if (sv.cieY > FTINY) { |
| 295 |
|
diffY = sv.cieY *= 1./PI; |
| 296 |
|
cvt_sdcolor(cdiff, &sv); |
| 297 |
|
} else { |
| 298 |
|
diffY = 0; |
| 299 |
< |
setcolor(cdiff, 0, 0, 0); |
| 299 |
> |
scolorblack(cdiff); |
| 300 |
|
} |
| 231 |
– |
/* need projected solid angles */ |
| 232 |
– |
omega *= fabs(vsrc[2]); |
| 301 |
|
ec = SDsizeBSDF(&tomega, ndp->vray, vsrc, SDqueryMin, ndp->sd); |
| 302 |
|
if (ec) |
| 303 |
|
goto baderror; |
| 304 |
< |
/* check indirect over-counting */ |
| 305 |
< |
if ((vsrc[2] > 0) ^ (ndp->vray[2] > 0) && bright(ndp->cthru) > FTINY) { |
| 306 |
< |
double dx = vsrc[0] + ndp->vray[0]; |
| 307 |
< |
double dy = vsrc[1] + ndp->vray[1]; |
| 240 |
< |
if (dx*dx + dy*dy <= (1.5*4./PI)*(omega + tomega + |
| 241 |
< |
2.*sqrt(omega*tomega))) |
| 242 |
< |
return(0); |
| 304 |
> |
/* check if sampling BSDF */ |
| 305 |
> |
if ((tsr = sqrt(tomega)) > 0) { |
| 306 |
> |
nsamp = 4.*specjitter*ndp->pr->rweight + .5; |
| 307 |
> |
nsamp += !nsamp; |
| 308 |
|
} |
| 309 |
< |
/* assign number of samples */ |
| 245 |
< |
sf = specjitter * ndp->pr->rweight; |
| 246 |
< |
if (tomega <= 0) |
| 247 |
< |
nsamp = 1; |
| 248 |
< |
else if (25.*tomega <= omega) |
| 249 |
< |
nsamp = 100.*sf + .5; |
| 250 |
< |
else |
| 251 |
< |
nsamp = 4.*sf*omega/tomega + .5; |
| 252 |
< |
nsamp += !nsamp; |
| 253 |
< |
sf = sqrt(omega); /* sample our source area */ |
| 254 |
< |
tsr = sqrt(tomega); |
| 309 |
> |
/* jitter to fuzz BSDF cells */ |
| 310 |
|
for (i = nsamp; i--; ) { |
| 256 |
– |
VCOPY(vsmp, vsrc); /* jitter query directions */ |
| 257 |
– |
if (nsamp > 1) { |
| 258 |
– |
multisamp(sd, 2, (i + frandom())/(double)nsamp); |
| 259 |
– |
vsmp[0] += (sd[0] - .5)*sf; |
| 260 |
– |
vsmp[1] += (sd[1] - .5)*sf; |
| 261 |
– |
normalize(vsmp); |
| 262 |
– |
} |
| 311 |
|
bsdf_jitter(vjit, ndp, tsr); |
| 312 |
|
/* compute BSDF */ |
| 313 |
< |
ec = SDevalBSDF(&sv, vjit, vsmp, ndp->sd); |
| 313 |
> |
ec = SDevalBSDF(&sv, vjit, vsrc, ndp->sd); |
| 314 |
|
if (ec) |
| 315 |
|
goto baderror; |
| 316 |
|
if (sv.cieY - diffY <= FTINY) |
| 317 |
|
continue; /* no specular part */ |
| 318 |
|
/* check for variable resolution */ |
| 319 |
< |
ec = SDsizeBSDF(&tomega2, vjit, vsmp, SDqueryMin, ndp->sd); |
| 319 |
> |
ec = SDsizeBSDF(&tomega2, vjit, vsrc, SDqueryMin, ndp->sd); |
| 320 |
|
if (ec) |
| 321 |
|
goto baderror; |
| 322 |
|
if (tomega2 < .12*tomega) |
| 323 |
|
continue; /* not safe to include */ |
| 324 |
|
cvt_sdcolor(csmp, &sv); |
| 325 |
< |
|
| 326 |
< |
if (sf < 2.5*tsr) { /* weight by Y for small sources */ |
| 279 |
< |
scalecolor(csmp, sv.cieY); |
| 280 |
< |
wtot += sv.cieY; |
| 281 |
< |
} else |
| 282 |
< |
wtot += 1.; |
| 283 |
< |
addcolor(cval, csmp); |
| 325 |
> |
saddscolor(scval, csmp); |
| 326 |
> |
++scnt; |
| 327 |
|
} |
| 328 |
< |
if (wtot <= FTINY) /* no valid specular samples? */ |
| 328 |
> |
if (!scnt) /* no valid specular samples? */ |
| 329 |
|
return(0); |
| 330 |
|
|
| 331 |
< |
sf = 1./wtot; /* weighted average BSDF */ |
| 289 |
< |
scalecolor(cval, sf); |
| 331 |
> |
scalescolor(scval, 1./scnt); /* weighted average BSDF */ |
| 332 |
|
/* subtract diffuse contribution */ |
| 333 |
< |
for (i = 3*(diffY > FTINY); i--; ) |
| 334 |
< |
if ((colval(cval,i) -= colval(cdiff,i)) < 0) |
| 335 |
< |
colval(cval,i) = 0; |
| 333 |
> |
for (i = NCSAMP*(diffY > FTINY); i--; ) |
| 334 |
> |
if ((scval[i] -= cdiff[i]) < 0) |
| 335 |
> |
scval[i] = 0; |
| 336 |
|
return(1); |
| 337 |
|
baderror: |
| 338 |
|
objerror(ndp->mp, USER, transSDError(ec)); |
| 342 |
|
/* Compute source contribution for BSDF (reflected & transmitted) */ |
| 343 |
|
static void |
| 344 |
|
dir_bsdf( |
| 345 |
< |
COLOR cval, /* returned coefficient */ |
| 345 |
> |
SCOLOR scval, /* returned coefficient */ |
| 346 |
|
void *nnp, /* material data */ |
| 347 |
|
FVECT ldir, /* light source direction */ |
| 348 |
|
double omega /* light source size */ |
| 351 |
|
BSDFDAT *np = (BSDFDAT *)nnp; |
| 352 |
|
double ldot; |
| 353 |
|
double dtmp; |
| 354 |
< |
COLOR ctmp; |
| 354 |
> |
SCOLOR sctmp; |
| 355 |
|
|
| 356 |
< |
setcolor(cval, 0, 0, 0); |
| 356 |
> |
scolorblack(scval); |
| 357 |
|
|
| 358 |
|
ldot = DOT(np->pnorm, ldir); |
| 359 |
|
if ((-FTINY <= ldot) & (ldot <= FTINY)) |
| 360 |
|
return; |
| 361 |
|
|
| 362 |
< |
if (ldot > 0 && bright(np->rdiff) > FTINY) { |
| 362 |
> |
if (ldot > 0 && sintens(np->rdiff) > FTINY) { |
| 363 |
|
/* |
| 364 |
|
* Compute diffuse reflected component |
| 365 |
|
*/ |
| 366 |
< |
copycolor(ctmp, np->rdiff); |
| 366 |
> |
copyscolor(sctmp, np->rdiff); |
| 367 |
|
dtmp = ldot * omega * (1./PI); |
| 368 |
< |
scalecolor(ctmp, dtmp); |
| 369 |
< |
addcolor(cval, ctmp); |
| 368 |
> |
scalescolor(sctmp, dtmp); |
| 369 |
> |
saddscolor(scval, sctmp); |
| 370 |
|
} |
| 371 |
< |
if (ldot < 0 && bright(np->tdiff) > FTINY) { |
| 371 |
> |
if (ldot < 0 && sintens(np->tdiff) > FTINY) { |
| 372 |
|
/* |
| 373 |
|
* Compute diffuse transmission |
| 374 |
|
*/ |
| 375 |
< |
copycolor(ctmp, np->tdiff); |
| 376 |
< |
dtmp = -ldot * omega * (1.0/PI); |
| 377 |
< |
scalecolor(ctmp, dtmp); |
| 378 |
< |
addcolor(cval, ctmp); |
| 375 |
> |
copyscolor(sctmp, np->tdiff); |
| 376 |
> |
dtmp = -ldot * omega * (1./PI); |
| 377 |
> |
scalescolor(sctmp, dtmp); |
| 378 |
> |
saddscolor(scval, sctmp); |
| 379 |
|
} |
| 380 |
|
if (ambRayInPmap(np->pr)) |
| 381 |
|
return; /* specular already in photon map */ |
| 382 |
|
/* |
| 383 |
|
* Compute specular scattering coefficient using BSDF |
| 384 |
|
*/ |
| 385 |
< |
if (!direct_specular_OK(ctmp, ldir, omega, np)) |
| 385 |
> |
if (!direct_specular_OK(sctmp, ldir, omega, np)) |
| 386 |
|
return; |
| 387 |
|
if (ldot < 0) { /* pattern for specular transmission */ |
| 388 |
< |
multcolor(ctmp, np->pr->pcol); |
| 388 |
> |
smultscolor(sctmp, np->pr->pcol); |
| 389 |
|
dtmp = -ldot * omega; |
| 390 |
|
} else |
| 391 |
|
dtmp = ldot * omega; |
| 392 |
< |
scalecolor(ctmp, dtmp); |
| 393 |
< |
addcolor(cval, ctmp); |
| 392 |
> |
scalescolor(sctmp, dtmp); |
| 393 |
> |
saddscolor(scval, sctmp); |
| 394 |
|
} |
| 395 |
|
|
| 396 |
|
/* Compute source contribution for BSDF (reflected only) */ |
| 397 |
|
static void |
| 398 |
|
dir_brdf( |
| 399 |
< |
COLOR cval, /* returned coefficient */ |
| 399 |
> |
SCOLOR scval, /* returned coefficient */ |
| 400 |
|
void *nnp, /* material data */ |
| 401 |
|
FVECT ldir, /* light source direction */ |
| 402 |
|
double omega /* light source size */ |
| 405 |
|
BSDFDAT *np = (BSDFDAT *)nnp; |
| 406 |
|
double ldot; |
| 407 |
|
double dtmp; |
| 408 |
< |
COLOR ctmp, ctmp1, ctmp2; |
| 408 |
> |
SCOLOR sctmp; |
| 409 |
|
|
| 410 |
< |
setcolor(cval, 0, 0, 0); |
| 410 |
> |
scolorblack(scval); |
| 411 |
|
|
| 412 |
|
ldot = DOT(np->pnorm, ldir); |
| 413 |
|
|
| 414 |
|
if (ldot <= FTINY) |
| 415 |
|
return; |
| 416 |
|
|
| 417 |
< |
if (bright(np->rdiff) > FTINY) { |
| 417 |
> |
if (sintens(np->rdiff) > FTINY) { |
| 418 |
|
/* |
| 419 |
|
* Compute diffuse reflected component |
| 420 |
|
*/ |
| 421 |
< |
copycolor(ctmp, np->rdiff); |
| 421 |
> |
copyscolor(sctmp, np->rdiff); |
| 422 |
|
dtmp = ldot * omega * (1./PI); |
| 423 |
< |
scalecolor(ctmp, dtmp); |
| 424 |
< |
addcolor(cval, ctmp); |
| 423 |
> |
scalescolor(sctmp, dtmp); |
| 424 |
> |
saddscolor(scval, sctmp); |
| 425 |
|
} |
| 426 |
|
if (ambRayInPmap(np->pr)) |
| 427 |
|
return; /* specular already in photon map */ |
| 428 |
|
/* |
| 429 |
|
* Compute specular reflection coefficient using BSDF |
| 430 |
|
*/ |
| 431 |
< |
if (!direct_specular_OK(ctmp, ldir, omega, np)) |
| 431 |
> |
if (!direct_specular_OK(sctmp, ldir, omega, np)) |
| 432 |
|
return; |
| 433 |
|
dtmp = ldot * omega; |
| 434 |
< |
scalecolor(ctmp, dtmp); |
| 435 |
< |
addcolor(cval, ctmp); |
| 434 |
> |
scalescolor(sctmp, dtmp); |
| 435 |
> |
saddscolor(scval, sctmp); |
| 436 |
|
} |
| 437 |
|
|
| 438 |
|
/* Compute source contribution for BSDF (transmitted only) */ |
| 439 |
|
static void |
| 440 |
|
dir_btdf( |
| 441 |
< |
COLOR cval, /* returned coefficient */ |
| 441 |
> |
SCOLOR scval, /* returned coefficient */ |
| 442 |
|
void *nnp, /* material data */ |
| 443 |
|
FVECT ldir, /* light source direction */ |
| 444 |
|
double omega /* light source size */ |
| 447 |
|
BSDFDAT *np = (BSDFDAT *)nnp; |
| 448 |
|
double ldot; |
| 449 |
|
double dtmp; |
| 450 |
< |
COLOR ctmp; |
| 450 |
> |
SCOLOR sctmp; |
| 451 |
|
|
| 452 |
< |
setcolor(cval, 0, 0, 0); |
| 452 |
> |
scolorblack(scval); |
| 453 |
|
|
| 454 |
|
ldot = DOT(np->pnorm, ldir); |
| 455 |
|
|
| 456 |
|
if (ldot >= -FTINY) |
| 457 |
|
return; |
| 458 |
|
|
| 459 |
< |
if (bright(np->tdiff) > FTINY) { |
| 459 |
> |
if (sintens(np->tdiff) > FTINY) { |
| 460 |
|
/* |
| 461 |
|
* Compute diffuse transmission |
| 462 |
|
*/ |
| 463 |
< |
copycolor(ctmp, np->tdiff); |
| 464 |
< |
dtmp = -ldot * omega * (1.0/PI); |
| 465 |
< |
scalecolor(ctmp, dtmp); |
| 466 |
< |
addcolor(cval, ctmp); |
| 463 |
> |
copyscolor(sctmp, np->tdiff); |
| 464 |
> |
dtmp = -ldot * omega * (1./PI); |
| 465 |
> |
scalescolor(sctmp, dtmp); |
| 466 |
> |
saddscolor(scval, sctmp); |
| 467 |
|
} |
| 468 |
|
if (ambRayInPmap(np->pr)) |
| 469 |
|
return; /* specular already in photon map */ |
| 470 |
|
/* |
| 471 |
|
* Compute specular scattering coefficient using BSDF |
| 472 |
|
*/ |
| 473 |
< |
if (!direct_specular_OK(ctmp, ldir, omega, np)) |
| 473 |
> |
if (!direct_specular_OK(sctmp, ldir, omega, np)) |
| 474 |
|
return; |
| 475 |
|
/* full pattern on transmission */ |
| 476 |
< |
multcolor(ctmp, np->pr->pcol); |
| 476 |
> |
smultscolor(sctmp, np->pr->pcol); |
| 477 |
|
dtmp = -ldot * omega; |
| 478 |
< |
scalecolor(ctmp, dtmp); |
| 479 |
< |
addcolor(cval, ctmp); |
| 478 |
> |
scalescolor(sctmp, dtmp); |
| 479 |
> |
saddscolor(scval, sctmp); |
| 480 |
|
} |
| 481 |
|
|
| 482 |
|
/* Sample separate BSDF component */ |
| 485 |
|
{ |
| 486 |
|
const int hasthru = (xmit && |
| 487 |
|
!(ndp->pr->crtype & (SPECULAR|AMBIENT)) |
| 488 |
< |
&& bright(ndp->cthru) > FTINY); |
| 488 |
> |
&& sintens(ndp->cthru) > FTINY); |
| 489 |
|
int nstarget = 1; |
| 490 |
|
int nsent = 0; |
| 491 |
|
int n; |
| 530 |
|
bsv.cieY /= (double)nstarget; |
| 531 |
|
cvt_sdcolor(sr.rcoef, &bsv); /* use sample color */ |
| 532 |
|
if (xmit) /* apply pattern on transmit */ |
| 533 |
< |
multcolor(sr.rcoef, ndp->pr->pcol); |
| 534 |
< |
if (rayorigin(&sr, SPECULAR, ndp->pr, sr.rcoef) < 0) { |
| 533 |
> |
smultscolor(sr.rcoef, ndp->pr->pcol); |
| 534 |
> |
if (rayorigin(&sr, xmit ? TSPECULAR : RSPECULAR, ndp->pr, sr.rcoef) < 0) { |
| 535 |
|
if (!n & (nstarget > 1)) { |
| 536 |
|
n = nstarget; /* avoid infinitue loop */ |
| 537 |
< |
nstarget = nstarget*sr.rweight/minweight; |
| 537 |
> |
nstarget = nstarget*sr.rweight/(minweight + 1e-20); |
| 538 |
|
if (n == nstarget) break; |
| 539 |
|
n = -1; /* moved target */ |
| 540 |
|
} |
| 543 |
|
if (xmit && ndp->thick != 0) /* need to offset origin? */ |
| 544 |
|
VSUM(sr.rorg, sr.rorg, ndp->pr->ron, -ndp->thick); |
| 545 |
|
rayvalue(&sr); /* send & evaluate sample */ |
| 546 |
< |
multcolor(sr.rcol, sr.rcoef); |
| 547 |
< |
addcolor(ndp->pr->rcol, sr.rcol); |
| 546 |
> |
smultscolor(sr.rcol, sr.rcoef); |
| 547 |
> |
saddscolor(ndp->pr->rcol, sr.rcol); |
| 548 |
|
++nsent; |
| 549 |
|
} |
| 550 |
|
return(nsent); |
| 556 |
|
{ |
| 557 |
|
int hasthru = (sflags == SDsampSpT && |
| 558 |
|
!(ndp->pr->crtype & (SPECULAR|AMBIENT)) |
| 559 |
< |
&& bright(ndp->cthru) > FTINY); |
| 559 |
> |
&& sintens(ndp->cthru) > FTINY); |
| 560 |
|
int n, ntotal = 0; |
| 561 |
|
double b = 0; |
| 562 |
|
SDSpectralDF *dfp; |
| 575 |
|
else |
| 576 |
|
dfp = ndp->sd->rb; |
| 577 |
|
} |
| 578 |
< |
setcolor(unsc, 0, 0, 0); |
| 578 |
> |
scolorblack(unsc); |
| 579 |
|
if (dfp == NULL) /* no specular component? */ |
| 580 |
|
return(0); |
| 581 |
|
|
| 584 |
|
if (rayorigin(&tr, TRANS, ndp->pr, ndp->cthru) == 0) { |
| 585 |
|
VCOPY(tr.rdir, ndp->pr->rdir); |
| 586 |
|
rayvalue(&tr); |
| 587 |
< |
multcolor(tr.rcol, tr.rcoef); |
| 588 |
< |
addcolor(ndp->pr->rcol, tr.rcol); |
| 587 |
> |
smultscolor(tr.rcol, tr.rcoef); |
| 588 |
> |
saddscolor(ndp->pr->rcol, tr.rcol); |
| 589 |
> |
ndp->pr->rxt = ndp->pr->rot + raydistance(&tr); |
| 590 |
|
++ntotal; |
| 591 |
< |
b = bright(ndp->cthru); |
| 591 |
> |
b = pbright(ndp->cthru); |
| 592 |
|
} else |
| 593 |
|
hasthru = 0; |
| 594 |
|
} |
| 598 |
|
FVECT vjit; |
| 599 |
|
bsdf_jitter(vjit, ndp, ndp->sr_vpsa[1]); |
| 600 |
|
b = SDdirectHemi(vjit, sflags, ndp->sd) - b; |
| 601 |
< |
if (b < 0) b = 0; |
| 601 |
> |
b *= (b > 0); |
| 602 |
|
} |
| 603 |
|
if (b <= specthresh+FTINY) { /* below sampling threshold? */ |
| 604 |
|
if (b > FTINY) { /* XXX no color from BSDF */ |
| 605 |
|
if (sflags == SDsampSpT) { |
| 606 |
< |
copycolor(unsc, ndp->pr->pcol); |
| 607 |
< |
scalecolor(unsc, b); |
| 606 |
> |
copyscolor(unsc, ndp->pr->pcol); |
| 607 |
> |
scalescolor(unsc, b); |
| 608 |
|
} else /* no pattern on reflection */ |
| 609 |
< |
setcolor(unsc, b, b, b); |
| 609 |
> |
setscolor(unsc, b, b, b); |
| 610 |
|
} |
| 611 |
|
return(ntotal); |
| 612 |
|
} |
| 624 |
|
int |
| 625 |
|
m_bsdf(OBJREC *m, RAY *r) |
| 626 |
|
{ |
| 627 |
+ |
int hasthick = (m->otype == MAT_BSDF); |
| 628 |
|
int hitfront; |
| 629 |
< |
COLOR ctmp; |
| 629 |
> |
SCOLOR sctmp; |
| 630 |
|
SDError ec; |
| 631 |
|
FVECT upvec, vtmp; |
| 632 |
|
MFUNC *mf; |
| 633 |
|
BSDFDAT nd; |
| 634 |
|
/* check arguments */ |
| 635 |
< |
if ((m->oargs.nsargs < 6) | (m->oargs.nfargs > 9) | |
| 635 |
> |
if ((m->oargs.nsargs < hasthick+5) | (m->oargs.nfargs > 9) | |
| 636 |
|
(m->oargs.nfargs % 3)) |
| 637 |
|
objerror(m, USER, "bad # arguments"); |
| 638 |
|
/* record surface struck */ |
| 639 |
|
hitfront = (r->rod > 0); |
| 640 |
|
/* load cal file */ |
| 641 |
< |
mf = getfunc(m, 5, 0x1d, 1); |
| 641 |
> |
mf = hasthick ? getfunc(m, 5, 0x1d, 1) |
| 642 |
> |
: getfunc(m, 4, 0xe, 1) ; |
| 643 |
|
setfunc(m, r); |
| 644 |
< |
/* get thickness */ |
| 645 |
< |
nd.thick = evalue(mf->ep[0]); |
| 646 |
< |
if ((-FTINY <= nd.thick) & (nd.thick <= FTINY)) |
| 647 |
< |
nd.thick = 0; |
| 644 |
> |
nd.thick = 0; /* set thickness */ |
| 645 |
> |
if (hasthick) { |
| 646 |
> |
nd.thick = evalue(mf->ep[0]); |
| 647 |
> |
if ((-FTINY <= nd.thick) & (nd.thick <= FTINY)) |
| 648 |
> |
nd.thick = 0; |
| 649 |
> |
} |
| 650 |
|
/* check backface visibility */ |
| 651 |
|
if (!hitfront & !backvis) { |
| 652 |
|
raytrans(r); |
| 659 |
|
raytrans(r); /* hide our proxy */ |
| 660 |
|
return(1); |
| 661 |
|
} |
| 662 |
+ |
if (hasthick && r->crtype & SHADOW) /* early shadow check #1 */ |
| 663 |
+ |
return(1); |
| 664 |
|
nd.mp = m; |
| 665 |
|
nd.pr = r; |
| 666 |
|
/* get BSDF data */ |
| 667 |
< |
nd.sd = loadBSDF(m->oargs.sarg[1]); |
| 668 |
< |
/* early shadow check */ |
| 669 |
< |
if (r->crtype & SHADOW && (nd.sd->tf == NULL) & (nd.sd->tb == NULL)) |
| 667 |
> |
nd.sd = loadBSDF(m->oargs.sarg[hasthick]); |
| 668 |
> |
/* early shadow check #2 */ |
| 669 |
> |
if (r->crtype & SHADOW && (nd.sd->tf == NULL) & (nd.sd->tb == NULL)) { |
| 670 |
> |
SDfreeCache(nd.sd); |
| 671 |
|
return(1); |
| 672 |
< |
/* diffuse reflectance */ |
| 672 |
> |
} |
| 673 |
> |
/* diffuse components */ |
| 674 |
|
if (hitfront) { |
| 675 |
|
cvt_sdcolor(nd.rdiff, &nd.sd->rLambFront); |
| 676 |
|
if (m->oargs.nfargs >= 3) { |
| 677 |
< |
setcolor(ctmp, m->oargs.farg[0], |
| 677 |
> |
setscolor(sctmp, m->oargs.farg[0], |
| 678 |
|
m->oargs.farg[1], |
| 679 |
|
m->oargs.farg[2]); |
| 680 |
< |
addcolor(nd.rdiff, ctmp); |
| 680 |
> |
saddscolor(nd.rdiff, sctmp); |
| 681 |
|
} |
| 682 |
+ |
cvt_sdcolor(nd.tdiff, &nd.sd->tLambFront); |
| 683 |
|
} else { |
| 684 |
|
cvt_sdcolor(nd.rdiff, &nd.sd->rLambBack); |
| 685 |
|
if (m->oargs.nfargs >= 6) { |
| 686 |
< |
setcolor(ctmp, m->oargs.farg[3], |
| 686 |
> |
setscolor(sctmp, m->oargs.farg[3], |
| 687 |
|
m->oargs.farg[4], |
| 688 |
|
m->oargs.farg[5]); |
| 689 |
< |
addcolor(nd.rdiff, ctmp); |
| 689 |
> |
saddscolor(nd.rdiff, sctmp); |
| 690 |
|
} |
| 691 |
+ |
cvt_sdcolor(nd.tdiff, &nd.sd->tLambBack); |
| 692 |
|
} |
| 693 |
< |
/* diffuse transmittance */ |
| 694 |
< |
cvt_sdcolor(nd.tdiff, &nd.sd->tLamb); |
| 642 |
< |
if (m->oargs.nfargs >= 9) { |
| 643 |
< |
setcolor(ctmp, m->oargs.farg[6], |
| 693 |
> |
if (m->oargs.nfargs >= 9) { /* add diffuse transmittance? */ |
| 694 |
> |
setscolor(sctmp, m->oargs.farg[6], |
| 695 |
|
m->oargs.farg[7], |
| 696 |
|
m->oargs.farg[8]); |
| 697 |
< |
addcolor(nd.tdiff, ctmp); |
| 697 |
> |
saddscolor(nd.tdiff, sctmp); |
| 698 |
|
} |
| 699 |
|
/* get modifiers */ |
| 700 |
|
raytexture(r, m->omod); |
| 701 |
|
/* modify diffuse values */ |
| 702 |
< |
multcolor(nd.rdiff, r->pcol); |
| 703 |
< |
multcolor(nd.tdiff, r->pcol); |
| 702 |
> |
smultscolor(nd.rdiff, r->pcol); |
| 703 |
> |
smultscolor(nd.tdiff, r->pcol); |
| 704 |
|
/* get up vector */ |
| 705 |
< |
upvec[0] = evalue(mf->ep[1]); |
| 706 |
< |
upvec[1] = evalue(mf->ep[2]); |
| 707 |
< |
upvec[2] = evalue(mf->ep[3]); |
| 705 |
> |
upvec[0] = evalue(mf->ep[hasthick+0]); |
| 706 |
> |
upvec[1] = evalue(mf->ep[hasthick+1]); |
| 707 |
> |
upvec[2] = evalue(mf->ep[hasthick+2]); |
| 708 |
|
/* return to world coords */ |
| 709 |
|
if (mf->fxp != &unitxf) { |
| 710 |
|
multv3(upvec, upvec, mf->fxp->xfm); |
| 725 |
|
} |
| 726 |
|
if (ec) { |
| 727 |
|
objerror(m, WARNING, "Illegal orientation vector"); |
| 728 |
+ |
SDfreeCache(nd.sd); |
| 729 |
|
return(1); |
| 730 |
|
} |
| 731 |
< |
compute_through(&nd); /* compute through component */ |
| 732 |
< |
if (r->crtype & SHADOW) { |
| 733 |
< |
RAY tr; /* attempt to pass shadow ray */ |
| 734 |
< |
if (rayorigin(&tr, TRANS, r, nd.cthru) < 0) |
| 735 |
< |
return(1); /* no through component */ |
| 736 |
< |
VCOPY(tr.rdir, r->rdir); |
| 737 |
< |
rayvalue(&tr); /* transmit with scaling */ |
| 738 |
< |
multcolor(tr.rcol, tr.rcoef); |
| 739 |
< |
copycolor(r->rcol, tr.rcol); |
| 740 |
< |
return(1); /* we're done */ |
| 731 |
> |
scolorblack(nd.cthru); /* consider through component */ |
| 732 |
> |
scolorblack(nd.cthru_surr); |
| 733 |
> |
if (m->otype == MAT_ABSDF) { |
| 734 |
> |
compute_through(&nd); |
| 735 |
> |
if (r->crtype & SHADOW) { |
| 736 |
> |
RAY tr; /* attempt to pass shadow ray */ |
| 737 |
> |
SDfreeCache(nd.sd); |
| 738 |
> |
if (rayorigin(&tr, TRANS, r, nd.cthru) < 0) |
| 739 |
> |
return(1); /* no through component */ |
| 740 |
> |
VCOPY(tr.rdir, r->rdir); |
| 741 |
> |
rayvalue(&tr); /* transmit with scaling */ |
| 742 |
> |
smultscolor(tr.rcol, tr.rcoef); |
| 743 |
> |
copyscolor(r->rcol, tr.rcol); |
| 744 |
> |
return(1); /* we're done */ |
| 745 |
> |
} |
| 746 |
|
} |
| 747 |
|
ec = SDinvXform(nd.fromloc, nd.toloc); |
| 748 |
|
if (!ec) /* determine BSDF resolution */ |
| 763 |
|
/* sample transmission */ |
| 764 |
|
sample_sdf(&nd, SDsampSpT); |
| 765 |
|
/* compute indirect diffuse */ |
| 766 |
< |
copycolor(ctmp, nd.rdiff); |
| 767 |
< |
addcolor(ctmp, nd.runsamp); |
| 768 |
< |
if (bright(ctmp) > FTINY) { /* ambient from reflection */ |
| 769 |
< |
if (!hitfront) |
| 770 |
< |
flipsurface(r); |
| 714 |
< |
multambient(ctmp, r, nd.pnorm); |
| 715 |
< |
addcolor(r->rcol, ctmp); |
| 716 |
< |
if (!hitfront) |
| 717 |
< |
flipsurface(r); |
| 766 |
> |
copyscolor(sctmp, nd.rdiff); |
| 767 |
> |
saddscolor(sctmp, nd.runsamp); |
| 768 |
> |
if (sintens(sctmp) > FTINY) { /* ambient from reflection */ |
| 769 |
> |
multambient(sctmp, r, nd.pnorm); |
| 770 |
> |
saddscolor(r->rcol, sctmp); |
| 771 |
|
} |
| 772 |
< |
copycolor(ctmp, nd.tdiff); |
| 773 |
< |
addcolor(ctmp, nd.tunsamp); |
| 774 |
< |
if (bright(ctmp) > FTINY) { /* ambient from other side */ |
| 772 |
> |
copyscolor(sctmp, nd.tdiff); |
| 773 |
> |
saddscolor(sctmp, nd.tunsamp); |
| 774 |
> |
if (sintens(sctmp) > FTINY) { /* ambient from other side */ |
| 775 |
|
FVECT bnorm; |
| 723 |
– |
if (hitfront) |
| 724 |
– |
flipsurface(r); |
| 776 |
|
bnorm[0] = -nd.pnorm[0]; |
| 777 |
|
bnorm[1] = -nd.pnorm[1]; |
| 778 |
|
bnorm[2] = -nd.pnorm[2]; |
| 779 |
|
if (nd.thick != 0) { /* proxy with offset? */ |
| 780 |
|
VCOPY(vtmp, r->rop); |
| 781 |
|
VSUM(r->rop, vtmp, r->ron, nd.thick); |
| 782 |
< |
multambient(ctmp, r, bnorm); |
| 782 |
> |
multambient(sctmp, r, bnorm); |
| 783 |
|
VCOPY(r->rop, vtmp); |
| 784 |
|
} else |
| 785 |
< |
multambient(ctmp, r, bnorm); |
| 786 |
< |
addcolor(r->rcol, ctmp); |
| 736 |
< |
if (hitfront) |
| 737 |
< |
flipsurface(r); |
| 785 |
> |
multambient(sctmp, r, bnorm); |
| 786 |
> |
saddscolor(r->rcol, sctmp); |
| 787 |
|
} |
| 788 |
|
/* add direct component */ |
| 789 |
< |
if ((bright(nd.tdiff) <= FTINY) & (nd.sd->tf == NULL) & |
| 790 |
< |
(nd.sd->tb == NULL)) { |
| 789 |
> |
if ((nd.sd->tf == NULL) & (nd.sd->tb == NULL) && |
| 790 |
> |
sintens(nd.tdiff) <= FTINY) { |
| 791 |
|
direct(r, dir_brdf, &nd); /* reflection only */ |
| 792 |
|
} else if (nd.thick == 0) { |
| 793 |
|
direct(r, dir_bsdf, &nd); /* thin surface scattering */ |
