14 |
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#include "otypes.h" |
15 |
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#include "otspecial.h" |
16 |
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#include "random.h" |
17 |
+ |
#include "pmap.h" |
18 |
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|
19 |
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#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
20 |
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|
21 |
< |
unsigned long raynum = 0; /* next unique ray number */ |
22 |
< |
unsigned long nrays = 0; /* number of calls to localhit */ |
21 |
> |
RNUMBER raynum = 0; /* next unique ray number */ |
22 |
> |
RNUMBER nrays = 0; /* number of calls to localhit */ |
23 |
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|
24 |
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static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
25 |
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OBJREC Lamb = { |
26 |
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OVOID, MAT_PLASTIC, "Lambertian", |
27 |
< |
{0, 5, NULL, Lambfa}, NULL, |
27 |
> |
{NULL, Lambfa, 0, 5}, NULL |
28 |
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}; /* a Lambertian surface */ |
29 |
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|
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OBJREC Aftplane; /* aft clipping plane object */ |
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static void checkset(OBJECT *os, OBJECT *cs); |
37 |
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|
38 |
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|
39 |
< |
extern int |
39 |
> |
int |
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rayorigin( /* start new ray from old one */ |
41 |
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RAY *r, |
42 |
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int rt, |
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colval(ro->cext,RED) : colval(ro->cext,GRN); |
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if (colval(ro->cext,BLU) < re) re = colval(ro->cext,BLU); |
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re *= ro->rot; |
97 |
< |
if (re > 0.1) |
98 |
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if (re > 92.) |
97 |
> |
if (re > 0.1) { |
98 |
> |
if (re > 92.) { |
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r->rweight = 0.0; |
100 |
< |
else |
100 |
> |
} else { |
101 |
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r->rweight *= exp(-re); |
102 |
+ |
} |
103 |
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} |
104 |
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} |
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rayclear(r); |
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if (r->rweight <= 0.0) /* check for expiration */ |
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return(-1); |
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if (r->crtype & SHADOW) /* shadow commitment */ |
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return(0); |
110 |
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/* ambient in photon map? */ |
111 |
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if (r->crtype & AMBIENT && photonMapping) |
112 |
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return(-1); |
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if (maxdepth <= 0 && rc != NULL) { /* Russian roulette */ |
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if (minweight <= 0.0) |
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error(USER, "zero ray weight in Russian roulette"); |
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r->rweight = minweight; |
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return(0); |
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} |
127 |
< |
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
127 |
> |
return(r->rweight >= minweight && r->rlvl <= abs(maxdepth) ? 0 : -1); |
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} |
129 |
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|
130 |
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|
131 |
< |
extern void |
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> |
void |
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rayclear( /* clear a ray for (re)evaluation */ |
133 |
< |
register RAY *r |
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> |
RAY *r |
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) |
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{ |
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r->rno = raynum++; |
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} |
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|
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|
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< |
extern void |
150 |
> |
void |
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raytrace( /* trace a ray and compute its value */ |
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RAY *r |
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) |
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} |
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|
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|
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< |
extern void |
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> |
void |
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raycont( /* check for clipped object and continue */ |
172 |
< |
register RAY *r |
172 |
> |
RAY *r |
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) |
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{ |
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if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
178 |
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} |
179 |
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|
180 |
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|
181 |
< |
extern void |
181 |
> |
void |
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raytrans( /* transmit ray as is */ |
183 |
< |
register RAY *r |
183 |
> |
RAY *r |
184 |
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) |
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{ |
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RAY tr; |
187 |
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|
188 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
189 |
< |
VCOPY(tr.rdir, r->rdir); |
190 |
< |
rayvalue(&tr); |
191 |
< |
copycolor(r->rcol, tr.rcol); |
192 |
< |
r->rt = r->rot + tr.rt; |
187 |
< |
} |
188 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
189 |
> |
VCOPY(tr.rdir, r->rdir); |
190 |
> |
rayvalue(&tr); |
191 |
> |
copycolor(r->rcol, tr.rcol); |
192 |
> |
r->rt = r->rot + tr.rt; |
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} |
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|
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|
196 |
< |
extern int |
196 |
> |
int |
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rayshade( /* shade ray r with material mod */ |
198 |
< |
register RAY *r, |
198 |
> |
RAY *r, |
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int mod |
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) |
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{ |
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< |
register OBJREC *m; |
202 |
> |
OBJREC *m; |
203 |
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|
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r->rt = r->rot; /* set effective ray length */ |
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for ( ; mod != OVOID; mod = m->omod) { |
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} |
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|
230 |
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|
231 |
< |
extern void |
231 |
> |
void |
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rayparticipate( /* compute ray medium participation */ |
233 |
< |
register RAY *r |
233 |
> |
RAY *r |
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) |
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{ |
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COLOR ce, ca; |
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multcolor(r->rcol, ce); /* path extinction */ |
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if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
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return; /* no scattering */ |
255 |
< |
setcolor(ca, |
256 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
257 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
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colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
259 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
255 |
> |
|
256 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
257 |
> |
if (!volumePhotonMapping) { |
258 |
> |
setcolor(ca, |
259 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
260 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
261 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
262 |
> |
addcolor(r->rcol, ca); /* ambient in scattering */ |
263 |
> |
} |
264 |
> |
|
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srcscatter(r); /* source in scattering */ |
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} |
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|
268 |
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|
269 |
< |
extern void |
269 |
> |
void |
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raytexture( /* get material modifiers */ |
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RAY *r, |
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OBJECT mod |
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) |
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{ |
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< |
register OBJREC *m; |
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> |
OBJREC *m; |
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/* execute textures and patterns */ |
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for ( ; mod != OVOID; mod = m->omod) { |
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m = objptr(mod); |
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} |
292 |
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|
293 |
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|
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< |
extern int |
294 |
> |
int |
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raymixture( /* mix modifiers */ |
296 |
< |
register RAY *r, |
296 |
> |
RAY *r, |
297 |
|
OBJECT fore, |
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|
OBJECT back, |
299 |
|
double coef |
301 |
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{ |
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RAY fr, br; |
303 |
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int foremat, backmat; |
304 |
< |
register int i; |
304 |
> |
int i; |
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/* bound coefficient */ |
306 |
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if (coef > 1.0) |
307 |
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coef = 1.0; |
312 |
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/* foreground */ |
313 |
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fr = *r; |
314 |
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if (coef > FTINY) { |
315 |
+ |
fr.rweight *= coef; |
316 |
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scalecolor(fr.rcoef, coef); |
317 |
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foremat = rayshade(&fr, fore); |
318 |
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} |
319 |
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/* background */ |
320 |
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br = *r; |
321 |
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if (coef < 1.0-FTINY) { |
322 |
+ |
br.rweight *= 1.0-coef; |
323 |
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scalecolor(br.rcoef, 1.0-coef); |
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backmat = rayshade(&br, back); |
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} |
351 |
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} |
352 |
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|
353 |
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|
354 |
< |
extern double |
354 |
> |
double |
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raydist( /* compute (cumulative) ray distance */ |
356 |
< |
register const RAY *r, |
357 |
< |
register int flags |
356 |
> |
const RAY *r, |
357 |
> |
int flags |
358 |
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) |
359 |
|
{ |
360 |
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double sum = 0.0; |
367 |
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} |
368 |
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|
369 |
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|
370 |
< |
extern void |
370 |
> |
void |
371 |
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raycontrib( /* compute (cumulative) ray contribution */ |
372 |
< |
double rc[3], |
372 |
> |
RREAL rc[3], |
373 |
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const RAY *r, |
374 |
|
int flags |
375 |
|
) |
393 |
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} |
394 |
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|
395 |
|
|
396 |
< |
extern double |
396 |
> |
double |
397 |
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raynormal( /* compute perturbed normal for ray */ |
398 |
|
FVECT norm, |
399 |
< |
register RAY *r |
399 |
> |
RAY *r |
400 |
|
) |
401 |
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{ |
402 |
|
double newdot; |
403 |
< |
register int i; |
403 |
> |
int i; |
404 |
|
|
405 |
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/* The perturbation is added to the surface normal to obtain |
406 |
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* the new normal. If the new normal would affect the surface |
429 |
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} |
430 |
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|
431 |
|
|
432 |
< |
extern void |
432 |
> |
void |
433 |
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newrayxf( /* get new tranformation matrix for ray */ |
434 |
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RAY *r |
435 |
|
) |
438 |
|
struct xfn *next; |
439 |
|
FULLXF xf; |
440 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
441 |
< |
register struct xfn *xp; |
442 |
< |
register const RAY *rp; |
441 |
> |
struct xfn *xp; |
442 |
> |
const RAY *rp; |
443 |
|
|
444 |
|
/* |
445 |
|
* Search for transform in circular list that |
450 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
451 |
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xp = xp->next; /* move to next */ |
452 |
|
if (xp == xflast) { /* need new one */ |
453 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
453 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
454 |
|
if (xp == NULL) |
455 |
|
error(SYSTEM, |
456 |
|
"out of memory in newrayxf"); |
467 |
|
} |
468 |
|
|
469 |
|
|
470 |
< |
extern void |
470 |
> |
void |
471 |
|
flipsurface( /* reverse surface orientation */ |
472 |
< |
register RAY *r |
472 |
> |
RAY *r |
473 |
|
) |
474 |
|
{ |
475 |
|
r->rod = -r->rod; |
482 |
|
} |
483 |
|
|
484 |
|
|
485 |
< |
extern void |
485 |
> |
void |
486 |
|
rayhit( /* standard ray hit test */ |
487 |
|
OBJECT *oset, |
488 |
|
RAY *r |
499 |
|
} |
500 |
|
|
501 |
|
|
502 |
< |
extern int |
502 |
> |
int |
503 |
|
localhit( /* check for hit in the octree */ |
504 |
< |
register RAY *r, |
505 |
< |
register CUBE *scene |
504 |
> |
RAY *r, |
505 |
> |
CUBE *scene |
506 |
|
) |
507 |
|
{ |
508 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
509 |
|
FVECT curpos; /* current cube position */ |
510 |
|
int sflags; /* sign flags */ |
511 |
|
double t, dt; |
512 |
< |
register int i; |
512 |
> |
int i; |
513 |
|
|
514 |
|
nrays++; /* increment trace counter */ |
515 |
|
sflags = 0; |
520 |
|
else if (r->rdir[i] < -1e-7) |
521 |
|
sflags |= 0x10 << i; |
522 |
|
} |
523 |
< |
if (sflags == 0) |
524 |
< |
error(CONSISTENCY, "zero ray direction in localhit"); |
523 |
> |
if (!sflags) { |
524 |
> |
error(WARNING, "zero ray direction in localhit"); |
525 |
> |
return(0); |
526 |
> |
} |
527 |
|
/* start off assuming nothing hit */ |
528 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
529 |
|
r->ro = &Aftplane; |
530 |
|
r->rot = r->rmax; |
531 |
< |
for (i = 0; i < 3; i++) |
518 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
531 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
532 |
|
} |
533 |
|
/* find global cube entrance point */ |
534 |
|
t = 0.0; |
551 |
|
if (t >= r->rot) /* clipped already */ |
552 |
|
return(0); |
553 |
|
/* advance position */ |
554 |
< |
for (i = 0; i < 3; i++) |
542 |
< |
curpos[i] += r->rdir[i]*t; |
554 |
> |
VSUM(curpos, curpos, r->rdir, t); |
555 |
|
|
556 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
557 |
|
return(0); |
567 |
|
FVECT pos, /* current position, modified herein */ |
568 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
569 |
|
int dirf, /* direction indicators to speed tests */ |
570 |
< |
register RAY *r, |
571 |
< |
register CUBE *cu |
570 |
> |
RAY *r, |
571 |
> |
CUBE *cu |
572 |
|
) |
573 |
|
{ |
574 |
|
int ax; |
576 |
|
|
577 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
578 |
|
CUBE cukid; |
579 |
< |
register int br, sgn; |
579 |
> |
int br, sgn; |
580 |
|
|
581 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
582 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
642 |
|
ax = 2; |
643 |
|
} |
644 |
|
} |
645 |
< |
pos[0] += r->rdir[0]*t; |
634 |
< |
pos[1] += r->rdir[1]*t; |
635 |
< |
pos[2] += r->rdir[2]*t; |
645 |
> |
VSUM(pos, pos, r->rdir, t); |
646 |
|
return(ax); |
647 |
|
} |
648 |
|
|
649 |
|
|
650 |
|
static int |
651 |
|
checkhit( /* check for hit in full cube */ |
652 |
< |
register RAY *r, |
652 |
> |
RAY *r, |
653 |
|
CUBE *cu, |
654 |
|
OBJECT *cxs |
655 |
|
) |
670 |
|
|
671 |
|
static void |
672 |
|
checkset( /* modify checked set and set to check */ |
673 |
< |
register OBJECT *os, /* os' = os - cs */ |
674 |
< |
register OBJECT *cs /* cs' = cs + os */ |
673 |
> |
OBJECT *os, /* os' = os - cs */ |
674 |
> |
OBJECT *cs /* cs' = cs + os */ |
675 |
|
) |
676 |
|
{ |
677 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
678 |
< |
register int i, j; |
678 |
> |
int i, j; |
679 |
|
int k; |
680 |
|
/* copy os in place, cset <- cs */ |
681 |
|
cset[0] = 0; |