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#include "copyright.h" |
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#include "ray.h" |
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#include "otypes.h" |
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< |
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> |
#include "otspecial.h" |
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#include "source.h" |
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#include "random.h" |
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#define MINSAMPLES 16 /* minimum number of pretest samples */ |
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#define STESTMAX 32 /* maximum seeks per sample */ |
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+ |
#define FEQ(a,b) ((a)-(b)+FTINY >= 0 && (b)-(a)+FTINY >= 0) |
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+ |
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static OBJECT *vobject; /* virtual source objects */ |
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static int nvobjects = 0; /* number of virtual source objects */ |
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< |
extern void |
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> |
static int |
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> |
isident4(MAT4 m) |
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> |
{ |
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> |
int i, j; |
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> |
|
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> |
for (i = 4; i--; ) |
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> |
for (j = 4; j--; ) |
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> |
if (!FEQ(m[i][j], i==j)) |
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> |
return(0); |
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> |
return(1); |
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> |
} |
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> |
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> |
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> |
void |
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markvirtuals(void) /* find and mark virtual sources */ |
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{ |
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< |
register OBJREC *o; |
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< |
register int i; |
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> |
OBJREC *o; |
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> |
int i; |
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/* check number of direct relays */ |
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if (directrelay <= 0) |
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return; |
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} |
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< |
extern void |
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> |
void |
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addvirtuals( /* add virtuals associated with source */ |
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int sn, |
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int nr |
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) |
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{ |
| 91 |
< |
register int i; |
| 91 |
> |
int i; |
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/* check relay limit first */ |
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if (nr <= 0) |
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return; |
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} |
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< |
extern void |
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> |
void |
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vproject( /* create projected source(s) if they exist */ |
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OBJREC *o, |
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int sn, |
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int n |
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) |
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{ |
| 111 |
< |
register int i; |
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< |
register VSMATERIAL *vsmat; |
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> |
int i; |
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> |
VSMATERIAL *vsmat; |
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MAT4 proj; |
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int ns; |
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} |
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< |
extern OBJREC * |
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> |
OBJREC * |
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vsmaterial( /* get virtual source material pointer */ |
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OBJREC *o |
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) |
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{ |
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< |
register int i; |
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< |
register OBJREC *m; |
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> |
int i; |
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> |
OBJREC *m; |
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i = o->omod; |
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< |
m = findmaterial(objptr(i)); |
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> |
m = findmaterial(o); |
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if (m == NULL) |
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return(objptr(i)); |
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if (m->otype != MAT_ILLUM || m->oargs.nsargs < 1 || |
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} |
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< |
extern int |
| 153 |
> |
int |
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makevsrc( /* make virtual source if reasonable */ |
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OBJREC *op, |
| 156 |
< |
register int sn, |
| 156 |
> |
int sn, |
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MAT4 pm |
| 158 |
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) |
| 159 |
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{ |
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double maxrad2, d; |
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int nsflags; |
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SPOT theirspot, ourspot; |
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< |
register int i; |
| 165 |
< |
|
| 164 |
> |
int i; |
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> |
/* check for no-op */ |
| 166 |
> |
if (isident4(pm)) |
| 167 |
> |
return(0); |
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nsflags = source[sn].sflags | (SVIRTUAL|SSPOT|SFOLLOW); |
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/* get object center and max. radius */ |
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maxrad2 = getdisk(ocent, op, sn); |
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} |
| 279 |
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| 280 |
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| 281 |
< |
extern double |
| 281 |
> |
double |
| 282 |
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getdisk( /* get visible object disk */ |
| 283 |
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FVECT oc, |
| 284 |
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OBJREC *op, |
| 285 |
< |
register int sn |
| 285 |
> |
int sn |
| 286 |
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) |
| 287 |
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{ |
| 288 |
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double rad2, roffs, offs, d, rd, rdoto; |
| 311 |
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} |
| 312 |
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| 313 |
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| 314 |
< |
extern int |
| 314 |
> |
int |
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vstestvis( /* pretest source visibility */ |
| 316 |
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int f, /* virtual source flags */ |
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OBJREC *o, /* relay object */ |
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FVECT oc, /* relay object center */ |
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double or2, /* relay object radius squared */ |
| 320 |
< |
register int sn /* target source number */ |
| 320 |
> |
int sn /* target source number */ |
| 321 |
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) |
| 322 |
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{ |
| 323 |
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RAY sr; |
| 324 |
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FVECT onorm; |
| 325 |
< |
FVECT offsdir; |
| 325 |
> |
double offsdir[3]; |
| 326 |
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SRCINDEX si; |
| 327 |
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double or, d, d1; |
| 328 |
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int stestlim, ssn; |
| 329 |
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int nhit, nok; |
| 330 |
< |
register int i, n; |
| 330 |
> |
int i, n; |
| 331 |
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/* return if pretesting disabled */ |
| 332 |
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if (vspretest <= 0) |
| 333 |
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return(f); |
| 338 |
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/* 32. == heuristic constant */ |
| 339 |
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n = 32.*or2/(thescene.cusize*thescene.cusize)*vspretest + .5; |
| 340 |
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} else { |
| 341 |
< |
for (i = 0; i < 3; i++) |
| 327 |
< |
offsdir[i] = source[sn].sloc[i] - oc[i]; |
| 341 |
> |
VSUB(offsdir, source[sn].sloc, oc); |
| 342 |
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d = DOT(offsdir,offsdir); |
| 343 |
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if (d <= FTINY) |
| 344 |
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n = 2.*PI * vspretest + .5; |
| 425 |
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|
| 426 |
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| 427 |
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#ifdef DEBUG |
| 428 |
< |
extern void |
| 428 |
> |
void |
| 429 |
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virtverb( /* print verbose description of virtual source */ |
| 430 |
< |
register int sn, |
| 430 |
> |
int sn, |
| 431 |
|
FILE *fp |
| 432 |
|
) |
| 433 |
|
{ |
| 420 |
– |
register int i; |
| 421 |
– |
|
| 434 |
|
fprintf(fp, "%s virtual source %d in %s %s\n", |
| 435 |
|
source[sn].sflags & SDISTANT ? "distant" : "local", |
| 436 |
|
sn, ofun[source[sn].so->otype].funame, |
