| 44 |
|
|
| 45 |
|
static int raymove(), checkset(), checkhit(); |
| 46 |
|
|
| 47 |
< |
#define MAXLOOP 128 /* modifier loop detection */ |
| 47 |
> |
#ifndef MAXLOOP |
| 48 |
> |
#define MAXLOOP 0 /* modifier loop detection */ |
| 49 |
> |
#endif |
| 50 |
|
|
| 51 |
|
#define RAYHIT (-1) /* return value for intercepted ray */ |
| 52 |
|
|
| 162 |
|
register RAY *r; |
| 163 |
|
int mod; |
| 164 |
|
{ |
| 163 |
– |
static int depth = 0; |
| 165 |
|
int gotmat; |
| 166 |
|
register OBJREC *m; |
| 167 |
+ |
#if MAXLOOP |
| 168 |
+ |
static int depth = 0; |
| 169 |
|
/* check for infinite loop */ |
| 170 |
|
if (depth++ >= MAXLOOP) |
| 171 |
|
objerror(r->ro, USER, "possible modifier loop"); |
| 172 |
+ |
#endif |
| 173 |
|
r->rt = r->rot; /* set effective ray length */ |
| 174 |
|
for (gotmat = 0; !gotmat && mod != OVOID; mod = m->omod) { |
| 175 |
|
m = objptr(mod); |
| 182 |
|
/* hack for irradiance calculation */ |
| 183 |
|
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS))) { |
| 184 |
|
if (irr_ignore(m->otype)) { |
| 185 |
+ |
#if MAXLOOP |
| 186 |
|
depth--; |
| 187 |
+ |
#endif |
| 188 |
|
raytrans(r); |
| 189 |
|
return(1); |
| 190 |
|
} |
| 194 |
|
/* materials call raytexture */ |
| 195 |
|
gotmat = (*ofun[m->otype].funp)(m, r); |
| 196 |
|
} |
| 197 |
+ |
#if MAXLOOP |
| 198 |
|
depth--; |
| 199 |
+ |
#endif |
| 200 |
|
return(gotmat); |
| 201 |
|
} |
| 202 |
|
|
| 236 |
|
RAY *r; |
| 237 |
|
int mod; |
| 238 |
|
{ |
| 231 |
– |
static int depth = 0; |
| 239 |
|
register OBJREC *m; |
| 240 |
+ |
#if MAXLOOP |
| 241 |
+ |
static int depth = 0; |
| 242 |
|
/* check for infinite loop */ |
| 243 |
|
if (depth++ >= MAXLOOP) |
| 244 |
|
objerror(r->ro, USER, "modifier loop"); |
| 245 |
+ |
#endif |
| 246 |
|
/* execute textures and patterns */ |
| 247 |
|
for ( ; mod != OVOID; mod = m->omod) { |
| 248 |
|
m = objptr(mod); |
| 258 |
|
objerror(r->ro, USER, errmsg); |
| 259 |
|
} |
| 260 |
|
} |
| 261 |
+ |
#if MAXLOOP |
| 262 |
|
depth--; /* end here */ |
| 263 |
+ |
#endif |
| 264 |
|
} |
| 265 |
|
|
| 266 |
|
|
| 289 |
|
backmat = rayshade(&br, back); |
| 290 |
|
/* check for transparency */ |
| 291 |
|
if (backmat ^ foremat) |
| 292 |
< |
if (!foremat && coef > FTINY) |
| 292 |
> |
if (backmat && coef > FTINY) |
| 293 |
|
raytrans(&fr); |
| 294 |
< |
else if (!backmat && coef < 1.0-FTINY) |
| 294 |
> |
else if (foremat && coef < 1.0-FTINY) |
| 295 |
|
raytrans(&br); |
| 296 |
|
/* mix perturbations */ |
| 297 |
|
for (i = 0; i < 3; i++) |