13 |
|
#include "source.h" |
14 |
|
#include "otypes.h" |
15 |
|
#include "otspecial.h" |
16 |
+ |
#include "random.h" |
17 |
+ |
#include "pmap.h" |
18 |
|
|
19 |
|
#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
20 |
|
|
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 |
|
|
24 |
|
static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
25 |
|
OBJREC Lamb = { |
26 |
|
OVOID, MAT_PLASTIC, "Lambertian", |
27 |
< |
{0, 5, NULL, Lambfa}, NULL, |
27 |
> |
{NULL, Lambfa, 0, 5}, NULL |
28 |
|
}; /* a Lambertian surface */ |
29 |
|
|
30 |
|
OBJREC Aftplane; /* aft clipping plane object */ |
36 |
|
static void checkset(OBJECT *os, OBJECT *cs); |
37 |
|
|
38 |
|
|
39 |
< |
extern int |
39 |
> |
int |
40 |
|
rayorigin( /* start new ray from old one */ |
41 |
|
RAY *r, |
42 |
|
int rt, |
43 |
|
const RAY *ro, |
44 |
< |
const COLOR rc |
44 |
> |
const SCOLOR rc |
45 |
|
) |
46 |
|
{ |
47 |
|
double rw, re; |
48 |
|
/* assign coefficient/weight */ |
49 |
|
if (rc == NULL) { |
50 |
|
rw = 1.0; |
51 |
< |
setcolor(r->rcoef, 1., 1., 1.); |
51 |
> |
setscolor(r->rcoef, 1., 1., 1.); |
52 |
|
} else { |
53 |
< |
rw = intens(rc); |
53 |
> |
rw = sintens((COLORV *)rc); |
54 |
> |
if (rw > 1.0) |
55 |
> |
rw = 1.0; /* avoid calculation growth */ |
56 |
|
if (rc != r->rcoef) |
57 |
< |
copycolor(r->rcoef, rc); |
57 |
> |
copyscolor(r->rcoef, rc); |
58 |
|
} |
59 |
|
if ((r->parent = ro) == NULL) { /* primary ray */ |
60 |
|
r->rlvl = 0; |
62 |
|
r->crtype = r->rtype = rt; |
63 |
|
r->rsrc = -1; |
64 |
|
r->clipset = NULL; |
65 |
+ |
r->revf = raytrace; |
66 |
|
copycolor(r->cext, cextinction); |
67 |
|
copycolor(r->albedo, salbedo); |
68 |
|
r->gecc = seccg; |
69 |
|
r->slights = NULL; |
70 |
|
} else { /* spawned ray */ |
71 |
< |
if (ro->rot >= FHUGE) { |
71 |
> |
if (ro->rot >= FHUGE*.99) { |
72 |
|
memset(r, 0, sizeof(RAY)); |
73 |
|
return(-1); /* illegal continuation */ |
74 |
|
} |
75 |
|
r->rlvl = ro->rlvl; |
76 |
+ |
r->rsrc = ro->rsrc; |
77 |
|
if (rt & RAYREFL) { |
78 |
|
r->rlvl++; |
79 |
< |
r->rsrc = -1; |
79 |
> |
if (r->rsrc >= 0) /* malfunctioning material? */ |
80 |
> |
r->rsrc = -1; |
81 |
|
r->clipset = ro->clipset; |
82 |
|
r->rmax = 0.0; |
83 |
|
} else { |
77 |
– |
r->rsrc = ro->rsrc; |
84 |
|
r->clipset = ro->newcset; |
85 |
< |
r->rmax = ro->rmax <= FTINY ? 0.0 : ro->rmax - ro->rot; |
85 |
> |
r->rmax = (ro->rmax > FTINY)*(ro->rmax - ro->rot); |
86 |
|
} |
87 |
+ |
r->revf = ro->revf; |
88 |
|
copycolor(r->cext, ro->cext); |
89 |
|
copycolor(r->albedo, ro->albedo); |
90 |
|
r->gecc = ro->gecc; |
97 |
|
colval(ro->cext,RED) : colval(ro->cext,GRN); |
98 |
|
if (colval(ro->cext,BLU) < re) re = colval(ro->cext,BLU); |
99 |
|
re *= ro->rot; |
100 |
< |
if (re > .1) |
101 |
< |
r->rweight *= exp(-re); |
100 |
> |
if (re > 0.1) { |
101 |
> |
if (re > 92.) { |
102 |
> |
r->rweight = 0.0; |
103 |
> |
} else { |
104 |
> |
r->rweight *= exp(-re); |
105 |
> |
} |
106 |
> |
} |
107 |
|
} |
108 |
|
rayclear(r); |
109 |
< |
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
109 |
> |
if (r->rweight <= 0.0) /* check for expiration */ |
110 |
> |
return(-1); |
111 |
> |
if (r->crtype & SHADOW) /* shadow commitment */ |
112 |
> |
return(0); |
113 |
> |
/* ambient in photon map? */ |
114 |
> |
if (ro != NULL && ro->crtype & AMBIENT) { |
115 |
> |
if (causticPhotonMapping) |
116 |
> |
return(-1); |
117 |
> |
if (photonMapping && rt != TRANS) |
118 |
> |
return(-1); |
119 |
> |
} |
120 |
> |
if ((maxdepth <= 0) & (rc != NULL)) { /* Russian roulette */ |
121 |
> |
if (minweight <= 0.0) |
122 |
> |
error(USER, "zero ray weight in Russian roulette"); |
123 |
> |
if ((maxdepth < 0) & (r->rlvl > -maxdepth)) |
124 |
> |
return(-1); /* upper reflection limit */ |
125 |
> |
if (r->rweight >= minweight) |
126 |
> |
return(0); |
127 |
> |
if (frandom() > r->rweight/minweight) |
128 |
> |
return(-1); |
129 |
> |
rw = minweight/r->rweight; /* promote survivor */ |
130 |
> |
scalescolor(r->rcoef, rw); |
131 |
> |
r->rweight = minweight; |
132 |
> |
return(0); |
133 |
> |
} |
134 |
> |
return((r->rweight >= minweight) & (r->rlvl <= abs(maxdepth)) ? 0 : -1); |
135 |
|
} |
136 |
|
|
137 |
|
|
138 |
< |
extern void |
138 |
> |
void |
139 |
|
rayclear( /* clear a ray for (re)evaluation */ |
140 |
< |
register RAY *r |
140 |
> |
RAY *r |
141 |
|
) |
142 |
|
{ |
143 |
|
r->rno = raynum++; |
146 |
|
r->robj = OVOID; |
147 |
|
r->ro = NULL; |
148 |
|
r->rox = NULL; |
149 |
< |
r->rt = r->rot = FHUGE; |
149 |
> |
r->rxt = r->rmt = r->rot = FHUGE; |
150 |
> |
VCOPY(r->rop, r->rorg); |
151 |
> |
r->ron[0] = -r->rdir[0]; r->ron[1] = -r->rdir[1]; r->ron[2] = -r->rdir[2]; |
152 |
> |
r->rod = 1.0; |
153 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
154 |
+ |
r->rflips = 0; |
155 |
|
r->uv[0] = r->uv[1] = 0.0; |
156 |
< |
setcolor(r->pcol, 1.0, 1.0, 1.0); |
157 |
< |
setcolor(r->rcol, 0.0, 0.0, 0.0); |
156 |
> |
setscolor(r->pcol, 1.0, 1.0, 1.0); |
157 |
> |
scolorblack(r->mcol); |
158 |
> |
scolorblack(r->rcol); |
159 |
|
} |
160 |
|
|
161 |
|
|
162 |
< |
extern void |
163 |
< |
rayvalue( /* trace a ray and compute its value */ |
162 |
> |
void |
163 |
> |
raytrace( /* trace a ray and compute its value */ |
164 |
|
RAY *r |
165 |
|
) |
166 |
|
{ |
179 |
|
} |
180 |
|
|
181 |
|
|
182 |
< |
extern void |
182 |
> |
void |
183 |
|
raycont( /* check for clipped object and continue */ |
184 |
< |
register RAY *r |
184 |
> |
RAY *r |
185 |
|
) |
186 |
|
{ |
187 |
|
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
190 |
|
} |
191 |
|
|
192 |
|
|
193 |
< |
extern void |
193 |
> |
void |
194 |
|
raytrans( /* transmit ray as is */ |
195 |
< |
register RAY *r |
195 |
> |
RAY *r |
196 |
|
) |
197 |
|
{ |
198 |
|
RAY tr; |
199 |
|
|
200 |
< |
if (rayorigin(&tr, TRANS, r, NULL) == 0) { |
201 |
< |
VCOPY(tr.rdir, r->rdir); |
202 |
< |
rayvalue(&tr); |
203 |
< |
copycolor(r->rcol, tr.rcol); |
204 |
< |
r->rt = r->rot + tr.rt; |
200 |
> |
rayorigin(&tr, TRANS, r, NULL); /* always continue */ |
201 |
> |
VCOPY(tr.rdir, r->rdir); |
202 |
> |
rayvalue(&tr); |
203 |
> |
copyscolor(r->mcol, tr.mcol); |
204 |
> |
copyscolor(r->rcol, tr.rcol); |
205 |
> |
r->rmt = r->rot + tr.rmt; |
206 |
> |
r->rxt = r->rot + tr.rxt; |
207 |
> |
} |
208 |
> |
|
209 |
> |
|
210 |
> |
int |
211 |
> |
raytirrad( /* irradiance hack */ |
212 |
> |
OBJREC *m, |
213 |
> |
RAY *r |
214 |
> |
) |
215 |
> |
{ |
216 |
> |
if (m->otype != MAT_CLIP && ismaterial(m->otype)) { |
217 |
> |
if (istransp(m) || isBSDFproxy(m)) { |
218 |
> |
raytrans(r); |
219 |
> |
return(1); |
220 |
> |
} |
221 |
> |
if (!islight(m->otype)) { |
222 |
> |
setscolor(r->pcol, 1.0, 1.0, 1.0); |
223 |
> |
return((*ofun[Lamb.otype].funp)(&Lamb, r)); |
224 |
> |
} |
225 |
|
} |
226 |
+ |
return(0); /* not a qualifying surface */ |
227 |
|
} |
228 |
|
|
229 |
|
|
230 |
< |
extern int |
230 |
> |
int |
231 |
|
rayshade( /* shade ray r with material mod */ |
232 |
< |
register RAY *r, |
232 |
> |
RAY *r, |
233 |
|
int mod |
234 |
|
) |
235 |
|
{ |
236 |
< |
register OBJREC *m; |
236 |
> |
int tst_irrad = do_irrad && !(r->crtype & ~(PRIMARY|TRANS)); |
237 |
> |
OBJREC *m; |
238 |
|
|
239 |
< |
r->rt = r->rot; /* set effective ray length */ |
239 |
> |
r->rxt = r->rot; /* preset effective ray length */ |
240 |
|
for ( ; mod != OVOID; mod = m->omod) { |
241 |
|
m = objptr(mod); |
242 |
|
/****** unnecessary test since modifier() is always called |
246 |
|
} |
247 |
|
******/ |
248 |
|
/* hack for irradiance calculation */ |
249 |
< |
if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
250 |
< |
m->otype != MAT_CLIP && |
251 |
< |
(ofun[m->otype].flags & (T_M|T_X))) { |
188 |
< |
if (irr_ignore(m->otype)) { |
189 |
< |
raytrans(r); |
190 |
< |
return(1); |
191 |
< |
} |
192 |
< |
if (!islight(m->otype)) |
193 |
< |
m = &Lamb; |
194 |
< |
} |
249 |
> |
if (tst_irrad && raytirrad(m, r)) |
250 |
> |
return(1); |
251 |
> |
|
252 |
|
if ((*ofun[m->otype].funp)(m, r)) |
253 |
|
return(1); /* materials call raytexture() */ |
254 |
|
} |
256 |
|
} |
257 |
|
|
258 |
|
|
259 |
< |
extern void |
259 |
> |
void |
260 |
|
rayparticipate( /* compute ray medium participation */ |
261 |
< |
register RAY *r |
261 |
> |
RAY *r |
262 |
|
) |
263 |
|
{ |
264 |
< |
COLOR ce, ca; |
264 |
> |
SCOLOR ce, ca; |
265 |
|
double re, ge, be; |
266 |
|
|
267 |
|
if (intens(r->cext) <= 1./FHUGE) |
274 |
|
ge *= 1. - colval(r->albedo,GRN); |
275 |
|
be *= 1. - colval(r->albedo,BLU); |
276 |
|
} |
277 |
< |
setcolor(ce, re<=FTINY ? 1. : re>92. ? 0. : exp(-re), |
277 |
> |
setscolor(ce, re<=FTINY ? 1. : re>92. ? 0. : exp(-re), |
278 |
|
ge<=FTINY ? 1. : ge>92. ? 0. : exp(-ge), |
279 |
|
be<=FTINY ? 1. : be>92. ? 0. : exp(-be)); |
280 |
< |
multcolor(r->rcol, ce); /* path extinction */ |
280 |
> |
smultscolor(r->rcol, ce); /* path extinction */ |
281 |
|
if (r->crtype & SHADOW || intens(r->albedo) <= FTINY) |
282 |
|
return; /* no scattering */ |
283 |
< |
setcolor(ca, |
284 |
< |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-colval(ce,RED)), |
285 |
< |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-colval(ce,GRN)), |
286 |
< |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-colval(ce,BLU))); |
287 |
< |
addcolor(r->rcol, ca); /* ambient in scattering */ |
283 |
> |
|
284 |
> |
/* PMAP: indirect inscattering accounted for by volume photons? */ |
285 |
> |
if (!volumePhotonMapping) { |
286 |
> |
setscolor(ca, |
287 |
> |
colval(r->albedo,RED)*colval(ambval,RED)*(1.-scolval(ce,RED)), |
288 |
> |
colval(r->albedo,GRN)*colval(ambval,GRN)*(1.-scolval(ce,GRN)), |
289 |
> |
colval(r->albedo,BLU)*colval(ambval,BLU)*(1.-scolval(ce,BLU))); |
290 |
> |
saddscolor(r->rcol, ca); /* ambient in scattering */ |
291 |
> |
} |
292 |
> |
|
293 |
|
srcscatter(r); /* source in scattering */ |
294 |
|
} |
295 |
|
|
296 |
|
|
297 |
< |
extern void |
297 |
> |
void |
298 |
|
raytexture( /* get material modifiers */ |
299 |
|
RAY *r, |
300 |
|
OBJECT mod |
301 |
|
) |
302 |
|
{ |
303 |
< |
register OBJREC *m; |
303 |
> |
OBJREC *m; |
304 |
|
/* execute textures and patterns */ |
305 |
|
for ( ; mod != OVOID; mod = m->omod) { |
306 |
|
m = objptr(mod); |
319 |
|
} |
320 |
|
|
321 |
|
|
322 |
< |
extern int |
322 |
> |
int |
323 |
|
raymixture( /* mix modifiers */ |
324 |
< |
register RAY *r, |
324 |
> |
RAY *r, |
325 |
|
OBJECT fore, |
326 |
|
OBJECT back, |
327 |
|
double coef |
328 |
|
) |
329 |
|
{ |
330 |
|
RAY fr, br; |
331 |
+ |
double mfore, mback; |
332 |
|
int foremat, backmat; |
333 |
< |
register int i; |
333 |
> |
int i; |
334 |
|
/* bound coefficient */ |
335 |
|
if (coef > 1.0) |
336 |
|
coef = 1.0; |
340 |
|
foremat = backmat = 0; |
341 |
|
/* foreground */ |
342 |
|
fr = *r; |
343 |
< |
if (coef > FTINY) |
343 |
> |
if (coef > FTINY) { |
344 |
> |
fr.rweight *= coef; |
345 |
> |
scalescolor(fr.rcoef, coef); |
346 |
|
foremat = rayshade(&fr, fore); |
347 |
+ |
} |
348 |
|
/* background */ |
349 |
|
br = *r; |
350 |
< |
if (coef < 1.0-FTINY) |
350 |
> |
if (coef < 1.0-FTINY) { |
351 |
> |
br.rweight *= 1.0-coef; |
352 |
> |
scalescolor(br.rcoef, 1.0-coef); |
353 |
|
backmat = rayshade(&br, back); |
354 |
+ |
} |
355 |
|
/* check for transparency */ |
356 |
|
if (backmat ^ foremat) { |
357 |
|
if (backmat && coef > FTINY) |
363 |
|
for (i = 0; i < 3; i++) |
364 |
|
r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
365 |
|
/* mix pattern colors */ |
366 |
< |
scalecolor(fr.pcol, coef); |
367 |
< |
scalecolor(br.pcol, 1.0-coef); |
368 |
< |
copycolor(r->pcol, fr.pcol); |
369 |
< |
addcolor(r->pcol, br.pcol); |
366 |
> |
scalescolor(fr.pcol, coef); |
367 |
> |
scalescolor(br.pcol, 1.0-coef); |
368 |
> |
copyscolor(r->pcol, fr.pcol); |
369 |
> |
saddscolor(r->pcol, br.pcol); |
370 |
|
/* return value tells if material */ |
371 |
|
if (!foremat & !backmat) |
372 |
|
return(0); |
373 |
|
/* mix returned ray values */ |
374 |
< |
scalecolor(fr.rcol, coef); |
375 |
< |
scalecolor(br.rcol, 1.0-coef); |
376 |
< |
copycolor(r->rcol, fr.rcol); |
377 |
< |
addcolor(r->rcol, br.rcol); |
378 |
< |
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
374 |
> |
scalescolor(fr.rcol, coef); |
375 |
> |
scalescolor(br.rcol, 1.0-coef); |
376 |
> |
copyscolor(r->rcol, fr.rcol); |
377 |
> |
saddscolor(r->rcol, br.rcol); |
378 |
> |
scalescolor(fr.mcol, coef); |
379 |
> |
scalescolor(br.mcol, 1.0-coef); |
380 |
> |
copyscolor(r->mcol, fr.mcol); |
381 |
> |
saddscolor(r->mcol, br.mcol); |
382 |
> |
mfore = pbright(fr.mcol); mback = pbright(br.mcol); |
383 |
> |
r->rmt = mfore > mback ? fr.rmt : br.rmt; |
384 |
> |
r->rxt = pbright(fr.rcol)-mfore > pbright(br.rcol)-mback ? |
385 |
> |
fr.rxt : br.rxt; |
386 |
|
return(1); |
387 |
|
} |
388 |
|
|
389 |
|
|
390 |
< |
extern double |
390 |
> |
double |
391 |
|
raydist( /* compute (cumulative) ray distance */ |
392 |
< |
register const RAY *r, |
393 |
< |
register int flags |
392 |
> |
const RAY *r, |
393 |
> |
int flags |
394 |
|
) |
395 |
|
{ |
396 |
|
double sum = 0.0; |
403 |
|
} |
404 |
|
|
405 |
|
|
406 |
< |
extern void |
406 |
> |
void |
407 |
|
raycontrib( /* compute (cumulative) ray contribution */ |
408 |
< |
COLOR rc, |
408 |
> |
SCOLOR rc, |
409 |
|
const RAY *r, |
410 |
|
int flags |
411 |
|
) |
412 |
|
{ |
413 |
< |
COLOR eext, ext1; |
338 |
< |
|
339 |
< |
setcolor(eext, 0., 0., 0.); |
340 |
< |
setcolor(rc, 1., 1., 1.); |
413 |
> |
static int warnedPM = 0; |
414 |
|
|
415 |
+ |
setscolor(rc, 1., 1., 1.); |
416 |
+ |
|
417 |
|
while (r != NULL && r->crtype&flags) { |
418 |
< |
multcolor(rc, r->rcoef); |
419 |
< |
copycolor(ext1, r->cext); |
420 |
< |
scalecolor(ext1, r->rot); |
421 |
< |
addcolor(eext, ext1); |
418 |
> |
smultscolor(rc, r->rcoef); |
419 |
> |
/* check for participating medium */ |
420 |
> |
if (bright(r->cext) > FTINY) { |
421 |
> |
double re = r->rot*colval(r->cext,RED), |
422 |
> |
ge = r->rot*colval(r->cext,GRN), |
423 |
> |
be = r->rot*colval(r->cext,BLU); |
424 |
> |
SCOLOR ce; |
425 |
> |
setscolor(ce, re<=FTINY ? 1. : re>92. ? 0. : exp(-re), |
426 |
> |
ge<=FTINY ? 1. : ge>92. ? 0. : exp(-ge), |
427 |
> |
be<=FTINY ? 1. : be>92. ? 0. : exp(-be)); |
428 |
> |
smultscolor(rc, ce); |
429 |
> |
} |
430 |
> |
if (!warnedPM && bright(r->albedo) > FTINY) { |
431 |
> |
error(WARNING, |
432 |
> |
"ray contribution calculation does not support participating media"); |
433 |
> |
warnedPM++; |
434 |
> |
} |
435 |
|
r = r->parent; |
436 |
|
} |
349 |
– |
if (intens(eext) > FTINY) { |
350 |
– |
setcolor(ext1, exp(-colval(eext,RED)), |
351 |
– |
exp(-colval(eext,GRN)), |
352 |
– |
exp(-colval(eext,BLU))); |
353 |
– |
multcolor(rc, ext1); |
354 |
– |
} |
437 |
|
} |
438 |
|
|
439 |
|
|
440 |
< |
extern double |
440 |
> |
double |
441 |
|
raynormal( /* compute perturbed normal for ray */ |
442 |
|
FVECT norm, |
443 |
< |
register RAY *r |
443 |
> |
RAY *r |
444 |
|
) |
445 |
|
{ |
446 |
|
double newdot; |
447 |
< |
register int i; |
447 |
> |
int i; |
448 |
|
|
449 |
|
/* The perturbation is added to the surface normal to obtain |
450 |
|
* the new normal. If the new normal would affect the surface |
464 |
|
return(r->rod); |
465 |
|
} |
466 |
|
newdot = -DOT(norm, r->rdir); |
467 |
< |
if ((newdot > 0.0) != (r->rod > 0.0)) { /* fix orientation */ |
467 |
> |
if ((newdot > 0.0) ^ (r->rod > 0.0)) { /* fix orientation */ |
468 |
|
for (i = 0; i < 3; i++) |
469 |
|
norm[i] += 2.0*newdot*r->rdir[i]; |
470 |
|
newdot = -newdot; |
473 |
|
} |
474 |
|
|
475 |
|
|
476 |
< |
extern void |
476 |
> |
void |
477 |
|
newrayxf( /* get new tranformation matrix for ray */ |
478 |
|
RAY *r |
479 |
|
) |
482 |
|
struct xfn *next; |
483 |
|
FULLXF xf; |
484 |
|
} xfseed = { &xfseed }, *xflast = &xfseed; |
485 |
< |
register struct xfn *xp; |
486 |
< |
register const RAY *rp; |
485 |
> |
struct xfn *xp; |
486 |
> |
const RAY *rp; |
487 |
|
|
488 |
|
/* |
489 |
|
* Search for transform in circular list that |
494 |
|
if (rp->rox == &xp->xf) { /* xp in use */ |
495 |
|
xp = xp->next; /* move to next */ |
496 |
|
if (xp == xflast) { /* need new one */ |
497 |
< |
xp = (struct xfn *)malloc(sizeof(struct xfn)); |
497 |
> |
xp = (struct xfn *)bmalloc(sizeof(struct xfn)); |
498 |
|
if (xp == NULL) |
499 |
|
error(SYSTEM, |
500 |
|
"out of memory in newrayxf"); |
511 |
|
} |
512 |
|
|
513 |
|
|
514 |
< |
extern void |
514 |
> |
void |
515 |
|
flipsurface( /* reverse surface orientation */ |
516 |
< |
register RAY *r |
516 |
> |
RAY *r |
517 |
|
) |
518 |
|
{ |
519 |
|
r->rod = -r->rod; |
523 |
|
r->pert[0] = -r->pert[0]; |
524 |
|
r->pert[1] = -r->pert[1]; |
525 |
|
r->pert[2] = -r->pert[2]; |
526 |
+ |
r->rflips++; |
527 |
|
} |
528 |
|
|
529 |
|
|
530 |
< |
extern void |
530 |
> |
int |
531 |
> |
rayreject( /* check if candidate hit is worse than current */ |
532 |
> |
OBJREC *o, |
533 |
> |
RAY *r, |
534 |
> |
double t, |
535 |
> |
double rod |
536 |
> |
) |
537 |
> |
{ |
538 |
> |
OBJREC *mnew, *mray; |
539 |
> |
|
540 |
> |
if ((t <= FTINY) | (t > r->rot + FTINY)) |
541 |
> |
return(1); |
542 |
> |
if (t < r->rot - FTINY) /* is new hit significantly closer? */ |
543 |
> |
return(0); |
544 |
> |
/* coincident point, so decide... */ |
545 |
> |
if (o == r->ro) |
546 |
> |
return(1); /* shouldn't happen */ |
547 |
> |
if (r->ro == NULL) |
548 |
> |
return(0); /* ditto */ |
549 |
> |
mnew = findmaterial(o); |
550 |
> |
mray = findmaterial(r->ro); /* check material transparencies */ |
551 |
> |
if (mnew == NULL) { |
552 |
> |
if (mray != NULL) |
553 |
> |
return(1); /* old has material, new does not */ |
554 |
> |
} else if (mray == NULL) { |
555 |
> |
return(0); /* new has material, old does not */ |
556 |
> |
} else if (istransp(mnew)) { |
557 |
> |
if (!istransp(mray)) |
558 |
> |
return(1); /* new is transparent, old is not */ |
559 |
> |
} else if (istransp(mray)) { |
560 |
> |
return(0); /* old is transparent, new is not */ |
561 |
> |
} |
562 |
> |
if (rod <= 0) { /* check which side we hit */ |
563 |
> |
if (r->rod > 0) |
564 |
> |
return(1); /* old hit front, new did not */ |
565 |
> |
} else if (r->rod <= 0) { |
566 |
> |
return(0); /* new hit front, old did not */ |
567 |
> |
} |
568 |
> |
/* earlier modifier definition wins tie */ |
569 |
> |
return (r->ro->omod >= o->omod); |
570 |
> |
} |
571 |
> |
|
572 |
> |
void |
573 |
|
rayhit( /* standard ray hit test */ |
574 |
|
OBJECT *oset, |
575 |
|
RAY *r |
586 |
|
} |
587 |
|
|
588 |
|
|
589 |
< |
extern int |
589 |
> |
int |
590 |
|
localhit( /* check for hit in the octree */ |
591 |
< |
register RAY *r, |
592 |
< |
register CUBE *scene |
591 |
> |
RAY *r, |
592 |
> |
CUBE *scene |
593 |
|
) |
594 |
|
{ |
595 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
596 |
|
FVECT curpos; /* current cube position */ |
597 |
|
int sflags; /* sign flags */ |
598 |
|
double t, dt; |
599 |
< |
register int i; |
599 |
> |
int i; |
600 |
|
|
601 |
|
nrays++; /* increment trace counter */ |
602 |
|
sflags = 0; |
607 |
|
else if (r->rdir[i] < -1e-7) |
608 |
|
sflags |= 0x10 << i; |
609 |
|
} |
610 |
< |
if (sflags == 0) |
611 |
< |
error(CONSISTENCY, "zero ray direction in localhit"); |
610 |
> |
if (!sflags) { |
611 |
> |
error(WARNING, "zero ray direction in localhit"); |
612 |
> |
return(0); |
613 |
> |
} |
614 |
|
/* start off assuming nothing hit */ |
615 |
|
if (r->rmax > FTINY) { /* except aft plane if one */ |
616 |
|
r->ro = &Aftplane; |
617 |
|
r->rot = r->rmax; |
618 |
< |
for (i = 0; i < 3; i++) |
492 |
< |
r->rop[i] = r->rorg[i] + r->rot*r->rdir[i]; |
618 |
> |
VSUM(r->rop, r->rorg, r->rdir, r->rot); |
619 |
|
} |
620 |
|
/* find global cube entrance point */ |
621 |
|
t = 0.0; |
638 |
|
if (t >= r->rot) /* clipped already */ |
639 |
|
return(0); |
640 |
|
/* advance position */ |
641 |
< |
for (i = 0; i < 3; i++) |
516 |
< |
curpos[i] += r->rdir[i]*t; |
641 |
> |
VSUM(curpos, curpos, r->rdir, t); |
642 |
|
|
643 |
|
if (!incube(scene, curpos)) /* non-intersecting ray */ |
644 |
|
return(0); |
654 |
|
FVECT pos, /* current position, modified herein */ |
655 |
|
OBJECT *cxs, /* checked objects, modified by checkhit */ |
656 |
|
int dirf, /* direction indicators to speed tests */ |
657 |
< |
register RAY *r, |
658 |
< |
register CUBE *cu |
657 |
> |
RAY *r, |
658 |
> |
CUBE *cu |
659 |
|
) |
660 |
|
{ |
661 |
|
int ax; |
663 |
|
|
664 |
|
if (istree(cu->cutree)) { /* recurse on subcubes */ |
665 |
|
CUBE cukid; |
666 |
< |
register int br, sgn; |
666 |
> |
int br, sgn; |
667 |
|
|
668 |
|
cukid.cusize = cu->cusize * 0.5; /* find subcube */ |
669 |
|
VCOPY(cukid.cuorg, cu->cuorg); |
729 |
|
ax = 2; |
730 |
|
} |
731 |
|
} |
732 |
< |
pos[0] += r->rdir[0]*t; |
608 |
< |
pos[1] += r->rdir[1]*t; |
609 |
< |
pos[2] += r->rdir[2]*t; |
732 |
> |
VSUM(pos, pos, r->rdir, t); |
733 |
|
return(ax); |
734 |
|
} |
735 |
|
|
736 |
|
|
737 |
|
static int |
738 |
|
checkhit( /* check for hit in full cube */ |
739 |
< |
register RAY *r, |
739 |
> |
RAY *r, |
740 |
|
CUBE *cu, |
741 |
|
OBJECT *cxs |
742 |
|
) |
757 |
|
|
758 |
|
static void |
759 |
|
checkset( /* modify checked set and set to check */ |
760 |
< |
register OBJECT *os, /* os' = os - cs */ |
761 |
< |
register OBJECT *cs /* cs' = cs + os */ |
760 |
> |
OBJECT *os, /* os' = os - cs */ |
761 |
> |
OBJECT *cs /* cs' = cs + os */ |
762 |
|
) |
763 |
|
{ |
764 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
765 |
< |
register int i, j; |
765 |
> |
int i, j; |
766 |
|
int k; |
767 |
|
/* copy os in place, cset <- cs */ |
768 |
|
cset[0] = 0; |