27 |
|
|
28 |
|
initstypes() /* initialize source dispatch table */ |
29 |
|
{ |
30 |
< |
extern VSMATERIAL mirror_vs; |
30 |
> |
extern VSMATERIAL mirror_vs, direct1_vs, direct2_vs; |
31 |
|
extern int fsetsrc(), ssetsrc(), sphsetsrc(), rsetsrc(); |
32 |
|
extern double fgetplaneq(), rgetplaneq(); |
33 |
|
extern double fgetmaxdisk(), rgetmaxdisk(); |
37 |
|
static SOBJECT rsobj = {rsetsrc, rgetplaneq, rgetmaxdisk}; |
38 |
|
|
39 |
|
sfun[MAT_MIRROR].mf = &mirror_vs; |
40 |
+ |
sfun[MAT_DIRECT1].mf = &direct1_vs; |
41 |
+ |
sfun[MAT_DIRECT2].mf = &direct2_vs; |
42 |
|
sfun[OBJ_FACE].of = &fsobj; |
43 |
|
sfun[OBJ_SOURCE].of = &ssobj; |
44 |
|
sfun[OBJ_SPHERE].of = &sphsobj; |
49 |
|
int |
50 |
|
newsource() /* allocate new source in our array */ |
51 |
|
{ |
52 |
+ |
#define SRCINC 4 |
53 |
|
if (nsources == 0) |
54 |
< |
source = (SRCREC *)malloc(sizeof(SRCREC)); |
55 |
< |
else |
54 |
> |
source = (SRCREC *)malloc(SRCINC*sizeof(SRCREC)); |
55 |
> |
else if (nsources%SRCINC == 0) |
56 |
|
source = (SRCREC *)realloc((char *)source, |
57 |
< |
(unsigned)(nsources+1)*sizeof(SRCREC)); |
57 |
> |
(unsigned)(nsources+SRCINC)*sizeof(SRCREC)); |
58 |
|
if (source == NULL) |
59 |
|
return(-1); |
60 |
|
source[nsources].sflags = 0; |
61 |
|
source[nsources].nhits = 1; |
62 |
|
source[nsources].ntests = 2; /* initial hit probability = 1/2 */ |
63 |
|
return(nsources++); |
64 |
+ |
#undef SRCINC |
65 |
|
} |
66 |
|
|
67 |
|
|
109 |
|
theta = PI/180.0/2.0 * so->oargs.farg[3]; |
110 |
|
if (theta <= FTINY) |
111 |
|
objerror(so, USER, "zero size"); |
112 |
< |
src->ss = theta >= PI/4 ? 1.0 : tan(theta); |
112 |
> |
src->ss = theta >= PI/4.0 ? 1.0 : tan(theta); |
113 |
|
src->ss2 = 2.0*PI * (1.0 - cos(theta)); |
114 |
|
} |
115 |
|
|
154 |
|
makespot(m) /* make a spotlight */ |
155 |
|
register OBJREC *m; |
156 |
|
{ |
153 |
– |
extern double cos(); |
157 |
|
register SPOT *ns; |
158 |
|
|
159 |
|
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
172 |
|
OBJREC *op; |
173 |
|
{ |
174 |
|
double maxrad2; |
175 |
< |
double d2; |
175 |
> |
double d; |
176 |
|
register int i, j; |
177 |
|
register FACE *f; |
178 |
|
|
179 |
|
f = getface(op); |
180 |
+ |
if (f->area == 0.) |
181 |
+ |
return(0.); |
182 |
|
for (i = 0; i < 3; i++) { |
183 |
|
ocent[i] = 0.; |
184 |
|
for (j = 0; j < f->nv; j++) |
185 |
|
ocent[i] += VERTEX(f,j)[i]; |
186 |
|
ocent[i] /= (double)f->nv; |
187 |
|
} |
188 |
+ |
d = DOT(ocent,f->norm); |
189 |
+ |
for (i = 0; i < 3; i++) |
190 |
+ |
ocent[i] += (f->offset - d)*f->norm[i]; |
191 |
|
maxrad2 = 0.; |
192 |
|
for (j = 0; j < f->nv; j++) { |
193 |
< |
d2 = dist2(VERTEX(f,j), ocent); |
194 |
< |
if (d2 > maxrad2) |
195 |
< |
maxrad2 = d2; |
193 |
> |
d = dist2(VERTEX(f,j), ocent); |
194 |
> |
if (d > maxrad2) |
195 |
> |
maxrad2 = d; |
196 |
|
} |
197 |
|
return(maxrad2); |
198 |
|
} |
237 |
|
} |
238 |
|
|
239 |
|
|
240 |
+ |
commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
241 |
+ |
register SPOT *sp1, *sp2; |
242 |
+ |
FVECT org; |
243 |
+ |
{ |
244 |
+ |
FVECT cent; |
245 |
+ |
double rad2, cos1, cos2; |
246 |
+ |
|
247 |
+ |
cos1 = 1. - sp1->siz/(2.*PI); |
248 |
+ |
cos2 = 1. - sp2->siz/(2.*PI); |
249 |
+ |
if (sp2->siz >= 2.*PI-FTINY) /* BIG, just check overlap */ |
250 |
+ |
return(DOT(sp1->aim,sp2->aim) >= cos1*cos2 - |
251 |
+ |
sqrt((1.-cos1*cos1)*(1.-cos2*cos2))); |
252 |
+ |
/* compute and check disks */ |
253 |
+ |
rad2 = intercircle(cent, sp1->aim, sp2->aim, |
254 |
+ |
1./(cos1*cos1) - 1., 1./(cos2*cos2) - 1.); |
255 |
+ |
if (rad2 <= FTINY || normalize(cent) == 0.) |
256 |
+ |
return(0); |
257 |
+ |
VCOPY(sp1->aim, cent); |
258 |
+ |
sp1->siz = 2.*PI*(1. - 1./sqrt(1.+rad2)); |
259 |
+ |
return(1); |
260 |
+ |
} |
261 |
+ |
|
262 |
+ |
|
263 |
+ |
commonbeam(sp1, sp2, dir) /* set sp1 to intersection of sp1 and sp2 */ |
264 |
+ |
register SPOT *sp1, *sp2; |
265 |
+ |
FVECT dir; |
266 |
+ |
{ |
267 |
+ |
FVECT cent, c1, c2; |
268 |
+ |
double rad2, d; |
269 |
+ |
register int i; |
270 |
+ |
/* move centers to common plane */ |
271 |
+ |
d = DOT(sp1->aim, dir); |
272 |
+ |
for (i = 0; i < 3; i++) |
273 |
+ |
c1[i] = sp1->aim[i] - d*dir[i]; |
274 |
+ |
d = DOT(sp2->aim, dir); |
275 |
+ |
for (i = 0; i < 3; i++) |
276 |
+ |
c2[i] = sp2->aim[i] - d*dir[i]; |
277 |
+ |
/* compute overlap */ |
278 |
+ |
rad2 = intercircle(cent, c1, c2, sp1->siz/PI, sp2->siz/PI); |
279 |
+ |
if (rad2 <= FTINY) |
280 |
+ |
return(0); |
281 |
+ |
VCOPY(sp1->aim, cent); |
282 |
+ |
sp1->siz = PI*rad2; |
283 |
+ |
return(1); |
284 |
+ |
} |
285 |
+ |
|
286 |
+ |
|
287 |
+ |
checkspot(sp, nrm) /* check spotlight for behind source */ |
288 |
+ |
register SPOT *sp; /* spotlight */ |
289 |
+ |
FVECT nrm; /* source surface normal */ |
290 |
+ |
{ |
291 |
+ |
double d, d1; |
292 |
+ |
|
293 |
+ |
d = DOT(sp->aim, nrm); |
294 |
+ |
if (d > FTINY) /* center in front? */ |
295 |
+ |
return(1); |
296 |
+ |
/* else check horizon */ |
297 |
+ |
d1 = 1. - sp->siz/(2.*PI); |
298 |
+ |
return(1.-FTINY-d*d < d1*d1); |
299 |
+ |
} |
300 |
+ |
|
301 |
+ |
|
302 |
+ |
double |
303 |
+ |
spotdisk(oc, op, sp, pos) /* intersect spot with object op */ |
304 |
+ |
FVECT oc; |
305 |
+ |
OBJREC *op; |
306 |
+ |
register SPOT *sp; |
307 |
+ |
FVECT pos; |
308 |
+ |
{ |
309 |
+ |
FVECT onorm; |
310 |
+ |
double offs, d, dist; |
311 |
+ |
register int i; |
312 |
+ |
|
313 |
+ |
offs = getplaneq(onorm, op); |
314 |
+ |
d = -DOT(onorm, sp->aim); |
315 |
+ |
if (d >= -FTINY && d <= FTINY) |
316 |
+ |
return(0.); |
317 |
+ |
dist = (DOT(pos, onorm) - offs)/d; |
318 |
+ |
if (dist < 0.) |
319 |
+ |
return(0.); |
320 |
+ |
for (i = 0; i < 3; i++) |
321 |
+ |
oc[i] = pos[i] + dist*sp->aim[i]; |
322 |
+ |
return(sp->siz*dist*dist/PI/(d*d)); |
323 |
+ |
} |
324 |
+ |
|
325 |
+ |
|
326 |
+ |
double |
327 |
+ |
beamdisk(oc, op, sp, dir) /* intersect beam with object op */ |
328 |
+ |
FVECT oc; |
329 |
+ |
OBJREC *op; |
330 |
+ |
register SPOT *sp; |
331 |
+ |
FVECT dir; |
332 |
+ |
{ |
333 |
+ |
FVECT onorm; |
334 |
+ |
double offs, d, dist; |
335 |
+ |
register int i; |
336 |
+ |
|
337 |
+ |
offs = getplaneq(onorm, op); |
338 |
+ |
d = -DOT(onorm, dir); |
339 |
+ |
if (d >= -FTINY && d <= FTINY) |
340 |
+ |
return(0.); |
341 |
+ |
dist = (DOT(sp->aim, onorm) - offs)/d; |
342 |
+ |
for (i = 0; i < 3; i++) |
343 |
+ |
oc[i] = sp->aim[i] + dist*dir[i]; |
344 |
+ |
return(sp->siz/PI/(d*d)); |
345 |
+ |
} |
346 |
+ |
|
347 |
+ |
|
348 |
+ |
double |
349 |
+ |
intercircle(cc, c1, c2, r1s, r2s) /* intersect two circles */ |
350 |
+ |
FVECT cc; /* midpoint (return value) */ |
351 |
+ |
FVECT c1, c2; /* circle centers */ |
352 |
+ |
double r1s, r2s; /* radii squared */ |
353 |
+ |
{ |
354 |
+ |
double a2, d2, l; |
355 |
+ |
FVECT disp; |
356 |
+ |
register int i; |
357 |
+ |
|
358 |
+ |
for (i = 0; i < 3; i++) |
359 |
+ |
disp[i] = c2[i] - c1[i]; |
360 |
+ |
d2 = DOT(disp,disp); |
361 |
+ |
/* circle within overlap? */ |
362 |
+ |
if (r1s < r2s) { |
363 |
+ |
if (r2s >= r1s + d2) { |
364 |
+ |
VCOPY(cc, c1); |
365 |
+ |
return(r1s); |
366 |
+ |
} |
367 |
+ |
} else { |
368 |
+ |
if (r1s >= r2s + d2) { |
369 |
+ |
VCOPY(cc, c2); |
370 |
+ |
return(r2s); |
371 |
+ |
} |
372 |
+ |
} |
373 |
+ |
a2 = .25*(2.*(r1s+r2s) - d2 - (r2s-r1s)*(r2s-r1s)/d2); |
374 |
+ |
/* no overlap? */ |
375 |
+ |
if (a2 <= 0.) |
376 |
+ |
return(0.); |
377 |
+ |
/* overlap, compute center */ |
378 |
+ |
l = sqrt((r1s - a2)/d2); |
379 |
+ |
for (i = 0; i < 3; i++) |
380 |
+ |
cc[i] = c1[i] + l*disp[i]; |
381 |
+ |
return(a2); |
382 |
+ |
} |
383 |
+ |
|
384 |
+ |
|
385 |
|
sourcehit(r) /* check to see if ray hit distant source */ |
386 |
|
register RAY *r; |
387 |
|
{ |
394 |
|
first = 0; last = nsources-1; |
395 |
|
} |
396 |
|
for (i = first; i <= last; i++) |
397 |
< |
if (source[i].sflags & SDISTANT) |
397 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
398 |
|
/* |
399 |
|
* Check to see if ray is within |
400 |
|
* solid angle of source. |
417 |
|
} |
418 |
|
|
419 |
|
|
420 |
< |
#define wrongsource(m, r) (m->otype!=MAT_ILLUM && \ |
421 |
< |
r->rsrc>=0 && \ |
422 |
< |
source[r->rsrc].so!=r->ro) |
420 |
> |
#define wrongsource(m, r) (r->rsrc>=0 && \ |
421 |
> |
source[r->rsrc].so!=r->ro && \ |
422 |
> |
(m->otype!=MAT_ILLUM || \ |
423 |
> |
objptr(source[r->rsrc].so->omod)->otype==MAT_ILLUM)) |
424 |
|
|
425 |
+ |
#define distglow(m, r) (m->otype==MAT_GLOW && \ |
426 |
+ |
r->rot > m->oargs.farg[3]) |
427 |
+ |
|
428 |
|
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
429 |
< |
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
429 |
> |
!distglow(m, r)) |
430 |
|
|
431 |
|
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
432 |
|
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
433 |
|
|
434 |
+ |
#define srcignore(m, r) (directinvis && !(r->crtype&SHADOW) && \ |
435 |
+ |
!distglow(m, r)) |
436 |
|
|
437 |
+ |
|
438 |
|
m_light(m, r) /* ray hit a light source */ |
439 |
|
register OBJREC *m; |
440 |
|
register RAY *r; |
444 |
|
return; |
445 |
|
/* check for passed illum */ |
446 |
|
if (passillum(m, r)) { |
287 |
– |
|
447 |
|
if (m->oargs.nsargs < 1 || !strcmp(m->oargs.sarg[0], VOIDID)) |
448 |
|
raytrans(r); |
449 |
|
else |
450 |
|
rayshade(r, modifier(m->oargs.sarg[0])); |
451 |
< |
|
452 |
< |
/* otherwise treat as source */ |
453 |
< |
} else { |
451 |
> |
return; |
452 |
> |
} |
453 |
> |
/* otherwise treat as source */ |
454 |
|
/* check for behind */ |
455 |
< |
if (r->rod < 0.0) |
456 |
< |
return; |
455 |
> |
if (r->rod < 0.0) |
456 |
> |
return; |
457 |
> |
/* check for invisibility */ |
458 |
> |
if (srcignore(m, r)) |
459 |
> |
return; |
460 |
|
/* get distribution pattern */ |
461 |
< |
raytexture(r, m->omod); |
461 |
> |
raytexture(r, m->omod); |
462 |
|
/* get source color */ |
463 |
< |
setcolor(r->rcol, m->oargs.farg[0], |
464 |
< |
m->oargs.farg[1], |
465 |
< |
m->oargs.farg[2]); |
463 |
> |
setcolor(r->rcol, m->oargs.farg[0], |
464 |
> |
m->oargs.farg[1], |
465 |
> |
m->oargs.farg[2]); |
466 |
|
/* modify value */ |
467 |
< |
multcolor(r->rcol, r->pcol); |
306 |
< |
} |
467 |
> |
multcolor(r->rcol, r->pcol); |
468 |
|
} |