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root/radiance/ray/src/rt/pmapmat.c
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Comparing ray/src/rt/pmapmat.c (file contents):
Revision 2.7 by rschregle, Wed May 27 17:54:19 2015 UTC vs.
Revision 2.15 by rschregle, Tue Mar 20 19:55:33 2018 UTC

# Line 1 | Line 1
1 + #ifndef lint
2 + static const char RCSid[] = "$Id$";
3 + #endif
4   /*
5     ==================================================================
6     Photon map support routines for scattering by materials.
# Line 8 | Line 11
11     supported by the Swiss National Science Foundation (SNSF, #147053)
12     ==================================================================
13    
11 –   $Id$
14   */
15  
16  
# Line 104 | Line 106 | void photonRay (const RAY *rayIn, RAY *rayOut,
106   {
107     rayorigin(rayOut, rayOutType, rayIn, NULL);
108    
109 <   /* Transfer flux */
110 <   copycolor(rayOut -> rcol, rayIn -> rcol);
111 <  
112 <   /* Copy caustic flag & direction for transferred rays */
113 <   if (rayOutType == PMAP_XFER) {
114 <      /* rayOut -> rtype |= rayIn -> rtype & SPECULAR; */
115 <      rayOut -> rtype |= rayIn -> rtype;
116 <      VCOPY(rayOut -> rdir, rayIn -> rdir);
117 <   }
118 <   else if (fluxAtten) {
119 <      /* Attenuate and normalise flux for scattered rays */
120 <      multcolor(rayOut -> rcol, fluxAtten);
121 <      colorNorm(rayOut -> rcol);
122 <   }
109 >   if (rayIn) {
110 >      /* Transfer flux */
111 >      copycolor(rayOut -> rcol, rayIn -> rcol);
112 >      
113 >      /* Copy caustic flag & direction for transferred rays */
114 >      if (rayOutType == PMAP_XFER) {
115 >         /* rayOut -> rtype |= rayIn -> rtype & SPECULAR; */
116 >         rayOut -> rtype |= rayIn -> rtype;
117 >         VCOPY(rayOut -> rdir, rayIn -> rdir);
118 >      }
119 >      else if (fluxAtten) {
120 >         /* Attenuate and normalise flux for scattered rays */
121 >         multcolor(rayOut -> rcol, fluxAtten);
122 >         colorNorm(rayOut -> rcol);
123 >      }
124  
125 <   /* Propagate index of emitting light source */
126 <   rayOut -> rsrc = rayIn -> rsrc;
125 >      /* Propagate index of emitting light source */
126 >      rayOut -> rsrc = rayIn -> rsrc;
127 >      
128 >      /* Update maximum photon path distance */
129 >      rayOut -> rmax = rayIn -> rmax - rayIn -> rot;
130 >   }
131   }
132  
133  
# Line 130 | Line 137 | static void addPhotons (const RAY *r)
137   {
138     if (!r -> rlvl)
139        /* Add direct photon map at primary hitpoint */
140 <      addPhoton(directPmap, r);
140 >      newPhoton(directPmap, r);
141     else {
142        /* Add global or precomputed photon map at indirect hitpoint */
143 <      addPhoton(preCompPmap ? preCompPmap : globalPmap, r);
143 >      newPhoton(preCompPmap ? preCompPmap : globalPmap, r);
144  
145        /* Store caustic photon if specular flag set */
146        if (PMAP_CAUSTICRAY(r))
147 <         addPhoton(causticPmap, r);
147 >         newPhoton(causticPmap, r);
148          
149        /* Store in contribution photon map */
150 <      addPhoton(contribPmap, r);
150 >      newPhoton(contribPmap, r);
151     }
152   }
153  
# Line 976 | Line 983 | static int aliasPhotonScatter (OBJREC *mat, RAY *rayIn
983    
984     /* Straight replacement? */
985     if (!mat -> oargs.nsargs) {
986 <      mat = objptr(mat -> omod);
987 <      photonScatter [mat -> otype] (mat, rayIn);
986 >      /* Skip void modifier! */
987 >      if (mat -> omod != OVOID) {  
988 >         mat = objptr(mat -> omod);
989 >         photonScatter [mat -> otype] (mat, rayIn);
990 >      }
991        
992        return 0;
993     }
# Line 1248 | Line 1258 | static int mx_dataPhotonScatter (OBJREC *mat, RAY *ray
1258     if (errno)
1259        objerror(mat, WARNING, "compute error");
1260     else {
1261 <      mat = objptr(mod [pmapRandom(rouletteState) < coef ? 0 : 1]);
1262 <      photonScatter [mat -> otype] (mat, rayIn);
1261 >      OBJECT mxMod = mod [pmapRandom(rouletteState) < coef ? 0 : 1];
1262 >      
1263 >      if (mxMod != OVOID) {
1264 >         mat = objptr(mxMod);
1265 >         photonScatter [mat -> otype] (mat, rayIn);
1266 >      }
1267 >      else {
1268 >         /* Transfer ray if no modifier */
1269 >         RAY rayOut;
1270 >        
1271 >         photonRay(rayIn, &rayOut, PMAP_XFER, NULL);
1272 >         tracePhoton(&rayOut);      
1273 >      }            
1274     }
1275    
1276     return 0;
# Line 1301 | Line 1322 | static int mx_pdataPhotonScatter (OBJREC *mat, RAY *ra
1322     if (errno)
1323        objerror(mat, WARNING, "compute error");
1324     else {
1325 <      mat = objptr(mod [pmapRandom(rouletteState) < coef ? 0 : 1]);
1326 <      photonScatter [mat -> otype] (mat, rayIn);
1325 >      OBJECT mxMod = mod [pmapRandom(rouletteState) < coef ? 0 : 1];
1326 >      
1327 >      if (mxMod != OVOID) {
1328 >         mat = objptr(mxMod);
1329 >         photonScatter [mat -> otype] (mat, rayIn);
1330 >      }
1331 >      else {
1332 >         /* Transfer ray if no modifier */
1333 >         RAY rayOut;
1334 >        
1335 >         photonRay(rayIn, &rayOut, PMAP_XFER, NULL);
1336 >         tracePhoton(&rayOut);      
1337 >      }      
1338     }  
1339    
1340     return 0;
# Line 1341 | Line 1373 | static int mx_funcPhotonScatter (OBJREC *mat, RAY *ray
1373     if (errno)
1374        objerror(mat, WARNING, "compute error");
1375     else {        
1376 <      mat = objptr(mod [pmapRandom(rouletteState) < coef ? 0 : 1]);
1377 <      photonScatter [mat -> otype] (mat, rayIn);
1376 >      OBJECT mxMod = mod [pmapRandom(rouletteState) < coef ? 0 : 1];
1377 >      
1378 >      if (mxMod != OVOID) {
1379 >         mat = objptr(mxMod);
1380 >         photonScatter [mat -> otype] (mat, rayIn);
1381 >      }
1382 >      else {
1383 >         /* Transfer ray if no modifier */
1384 >         RAY rayOut;
1385 >        
1386 >         photonRay(rayIn, &rayOut, PMAP_XFER, NULL);
1387 >         tracePhoton(&rayOut);      
1388 >      }
1389     }
1390    
1391     return 0;
# Line 1624 | Line 1667 | static int bsdfPhotonScatter (OBJREC *mat, RAY *rayIn)
1667  
1668  
1669   static int lightPhotonScatter (OBJREC* mat, RAY* ray)
1670 < /* Light sources doan' reflect */
1670 > /* Light sources doan' reflect, mang */
1671   {
1672     return 0;
1673   }

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