| 109 |
|
RAY *r; |
| 110 |
|
{ |
| 111 |
|
extern int (*trace)(); |
| 112 |
– |
int gotmat; |
| 112 |
|
|
| 113 |
|
if (localhit(r, &thescene)) |
| 114 |
< |
gotmat = raycont(r); /* hit local surface, evaluate */ |
| 114 |
> |
raycont(r); /* hit local surface, evaluate */ |
| 115 |
|
else if (r->ro == &Aftplane) { |
| 116 |
|
r->ro = NULL; /* hit aft clipping plane */ |
| 117 |
|
r->rot = FHUGE; |
| 118 |
|
} else if (sourcehit(r)) |
| 119 |
< |
gotmat = rayshade(r, r->ro->omod); /* distant source */ |
| 119 |
> |
rayshade(r, r->ro->omod); /* distant source */ |
| 120 |
|
|
| 122 |
– |
if (r->ro != NULL && !gotmat) |
| 123 |
– |
objerror(r->ro, USER, "material not found"); |
| 124 |
– |
|
| 121 |
|
rayparticipate(r); /* for participating medium */ |
| 122 |
|
|
| 123 |
|
if (trace != NULL) |
| 129 |
|
register RAY *r; |
| 130 |
|
{ |
| 131 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
| 132 |
< |
r->ro->omod == OVOID) { |
| 132 |
> |
!rayshade(r, r->ro->omod)) |
| 133 |
|
raytrans(r); |
| 138 |
– |
return(1); |
| 139 |
– |
} |
| 140 |
– |
return(rayshade(r, r->ro->omod)); |
| 134 |
|
} |
| 135 |
|
|
| 136 |
|
|
| 253 |
|
RAY fr, br; |
| 254 |
|
int foremat, backmat; |
| 255 |
|
register int i; |
| 256 |
< |
/* clip coefficient */ |
| 256 |
> |
/* bound coefficient */ |
| 257 |
|
if (coef > 1.0) |
| 258 |
|
coef = 1.0; |
| 259 |
|
else if (coef < 0.0) |
| 260 |
|
coef = 0.0; |
| 261 |
|
/* compute foreground and background */ |
| 262 |
< |
foremat = backmat = -1; |
| 262 |
> |
foremat = backmat = 0; |
| 263 |
|
/* foreground */ |
| 264 |
|
copystruct(&fr, r); |
| 265 |
< |
if (fore != OVOID && coef > FTINY) |
| 265 |
> |
if (coef > FTINY) |
| 266 |
|
foremat = rayshade(&fr, fore); |
| 267 |
|
/* background */ |
| 268 |
|
copystruct(&br, r); |
| 269 |
< |
if (back != OVOID && coef < 1.0-FTINY) |
| 269 |
> |
if (coef < 1.0-FTINY) |
| 270 |
|
backmat = rayshade(&br, back); |
| 271 |
< |
/* check */ |
| 272 |
< |
if (foremat < 0) |
| 273 |
< |
if (backmat < 0) |
| 274 |
< |
foremat = backmat = 0; |
| 271 |
> |
/* check for transparency */ |
| 272 |
> |
if (backmat ^ foremat) |
| 273 |
> |
if (backmat) |
| 274 |
> |
raytrans(&fr); |
| 275 |
|
else |
| 276 |
< |
foremat = backmat; |
| 284 |
< |
else if (backmat < 0) |
| 285 |
< |
backmat = foremat; |
| 286 |
< |
if ((foremat==0) != (backmat==0)) |
| 287 |
< |
objerror(r->ro, USER, "mixing material with non-material"); |
| 276 |
> |
raytrans(&br); |
| 277 |
|
/* mix perturbations */ |
| 278 |
|
for (i = 0; i < 3; i++) |
| 279 |
|
r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
| 282 |
|
scalecolor(br.pcol, 1.0-coef); |
| 283 |
|
copycolor(r->pcol, fr.pcol); |
| 284 |
|
addcolor(r->pcol, br.pcol); |
| 296 |
– |
/* mix returned ray values */ |
| 297 |
– |
if (foremat) { |
| 298 |
– |
scalecolor(fr.rcol, coef); |
| 299 |
– |
scalecolor(br.rcol, 1.0-coef); |
| 300 |
– |
copycolor(r->rcol, fr.rcol); |
| 301 |
– |
addcolor(r->rcol, br.rcol); |
| 302 |
– |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
| 303 |
– |
} |
| 285 |
|
/* return value tells if material */ |
| 286 |
< |
return(foremat); |
| 286 |
> |
if (!foremat & !backmat) |
| 287 |
> |
return(0); |
| 288 |
> |
/* mix returned ray values */ |
| 289 |
> |
scalecolor(fr.rcol, coef); |
| 290 |
> |
scalecolor(br.rcol, 1.0-coef); |
| 291 |
> |
copycolor(r->rcol, fr.rcol); |
| 292 |
> |
addcolor(r->rcol, br.rcol); |
| 293 |
> |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
| 294 |
> |
return(1); |
| 295 |
|
} |
| 296 |
|
|
| 297 |
|
|
