| 20 |
|
unsigned long raynum = 0; /* next unique ray number */ |
| 21 |
|
unsigned long nrays = 0; /* number of calls to localhit */ |
| 22 |
|
|
| 23 |
< |
static FLOAT Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
| 23 |
> |
static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
| 24 |
|
OBJREC Lamb = { |
| 25 |
|
OVOID, MAT_PLASTIC, "Lambertian", |
| 26 |
|
{0, 5, NULL, Lambfa}, NULL, |
| 31 |
|
static int raymove(), checkhit(); |
| 32 |
|
static void checkset(); |
| 33 |
|
|
| 34 |
– |
#ifndef MAXLOOP |
| 35 |
– |
#define MAXLOOP 0 /* modifier loop detection */ |
| 36 |
– |
#endif |
| 37 |
– |
|
| 34 |
|
#define RAYHIT (-1) /* return value for intercepted ray */ |
| 35 |
|
|
| 36 |
|
|
| 154 |
|
{ |
| 155 |
|
int gotmat; |
| 156 |
|
register OBJREC *m; |
| 161 |
– |
#if MAXLOOP |
| 162 |
– |
static int depth = 0; |
| 163 |
– |
/* check for infinite loop */ |
| 164 |
– |
if (depth++ >= MAXLOOP) |
| 165 |
– |
objerror(r->ro, USER, "possible modifier loop"); |
| 166 |
– |
#endif |
| 157 |
|
r->rt = r->rot; /* set effective ray length */ |
| 158 |
|
for (gotmat = 0; !gotmat && mod != OVOID; mod = m->omod) { |
| 159 |
|
m = objptr(mod); |
| 164 |
|
} |
| 165 |
|
******/ |
| 166 |
|
/* hack for irradiance calculation */ |
| 167 |
< |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS))) { |
| 167 |
> |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
| 168 |
> |
m->otype != MAT_CLIP && |
| 169 |
> |
(ofun[m->otype].flags & (T_M|T_X))) { |
| 170 |
|
if (irr_ignore(m->otype)) { |
| 179 |
– |
#if MAXLOOP |
| 180 |
– |
depth--; |
| 181 |
– |
#endif |
| 171 |
|
raytrans(r); |
| 172 |
|
return(1); |
| 173 |
|
} |
| 177 |
|
/* materials call raytexture */ |
| 178 |
|
gotmat = (*ofun[m->otype].funp)(m, r); |
| 179 |
|
} |
| 191 |
– |
#if MAXLOOP |
| 192 |
– |
depth--; |
| 193 |
– |
#endif |
| 180 |
|
return(gotmat); |
| 181 |
|
} |
| 182 |
|
|
| 213 |
|
} |
| 214 |
|
|
| 215 |
|
|
| 216 |
+ |
void |
| 217 |
|
raytexture(r, mod) /* get material modifiers */ |
| 218 |
|
RAY *r; |
| 219 |
< |
int mod; |
| 219 |
> |
OBJECT mod; |
| 220 |
|
{ |
| 221 |
|
register OBJREC *m; |
| 235 |
– |
#if MAXLOOP |
| 236 |
– |
static int depth = 0; |
| 237 |
– |
/* check for infinite loop */ |
| 238 |
– |
if (depth++ >= MAXLOOP) |
| 239 |
– |
objerror(r->ro, USER, "modifier loop"); |
| 240 |
– |
#endif |
| 222 |
|
/* execute textures and patterns */ |
| 223 |
|
for ( ; mod != OVOID; mod = m->omod) { |
| 224 |
|
m = objptr(mod); |
| 234 |
|
objerror(r->ro, USER, errmsg); |
| 235 |
|
} |
| 236 |
|
} |
| 256 |
– |
#if MAXLOOP |
| 257 |
– |
depth--; /* end here */ |
| 258 |
– |
#endif |
| 237 |
|
} |
| 238 |
|
|
| 239 |
|
|
| 254 |
|
/* compute foreground and background */ |
| 255 |
|
foremat = backmat = 0; |
| 256 |
|
/* foreground */ |
| 257 |
< |
copystruct(&fr, r); |
| 257 |
> |
fr = *r; |
| 258 |
|
if (coef > FTINY) |
| 259 |
|
foremat = rayshade(&fr, fore); |
| 260 |
|
/* background */ |
| 261 |
< |
copystruct(&br, r); |
| 261 |
> |
br = *r; |
| 262 |
|
if (coef < 1.0-FTINY) |
| 263 |
|
backmat = rayshade(&br, back); |
| 264 |
|
/* check for transparency */ |
| 265 |
< |
if (backmat ^ foremat) |
| 265 |
> |
if (backmat ^ foremat) { |
| 266 |
|
if (backmat && coef > FTINY) |
| 267 |
|
raytrans(&fr); |
| 268 |
|
else if (foremat && coef < 1.0-FTINY) |
| 269 |
|
raytrans(&br); |
| 270 |
+ |
} |
| 271 |
|
/* mix perturbations */ |
| 272 |
|
for (i = 0; i < 3; i++) |
| 273 |
|
r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
| 464 |
|
} |
| 465 |
|
cxset[0] = 0; |
| 466 |
|
raymove(curpos, cxset, sflags, r, scene); |
| 467 |
< |
return(r->ro != NULL & r->ro != &Aftplane); |
| 467 |
> |
return((r->ro != NULL) & (r->ro != &Aftplane)); |
| 468 |
|
} |
| 469 |
|
|
| 470 |
|
|
