59 |
|
if (source == NULL) |
60 |
|
return(-1); |
61 |
|
source[nsources].sflags = 0; |
62 |
< |
source[nsources].nhits = 0; |
63 |
< |
source[nsources].ntests = 1; /* initial hit probability = 0 */ |
62 |
> |
source[nsources].nhits = 1; |
63 |
> |
source[nsources].ntests = 2; /* initial hit probability = 50% */ |
64 |
|
#if SHADCACHE |
65 |
|
source[nsources].obscache = NULL; |
66 |
|
#endif |
101 |
|
src->so = so; |
102 |
|
/* get the face */ |
103 |
|
f = getface(so); |
104 |
+ |
if (f->area == 0.0) |
105 |
+ |
objerror(so, USER, "zero source area"); |
106 |
|
/* find the center */ |
107 |
|
for (j = 0; j < 3; j++) { |
108 |
|
src->sloc[j] = 0.0; |
111 |
|
src->sloc[j] /= (double)f->nv; |
112 |
|
} |
113 |
|
if (!inface(src->sloc, f)) |
114 |
< |
objerror(so, USER, "cannot hit center"); |
114 |
> |
objerror(so, USER, "cannot hit source center"); |
115 |
|
src->sflags |= SFLAT; |
116 |
|
VCOPY(src->snorm, f->norm); |
117 |
|
src->ss2 = f->area; |
145 |
|
src->so = so; |
146 |
|
if (so->oargs.nfargs != 4) |
147 |
|
objerror(so, USER, "bad arguments"); |
148 |
< |
src->sflags |= SDISTANT; |
148 |
> |
src->sflags |= (SDISTANT|SCIR); |
149 |
|
VCOPY(src->sloc, so->oargs.farg); |
150 |
|
if (normalize(src->sloc) == 0.0) |
151 |
|
objerror(so, USER, "zero direction"); |
173 |
|
if (so->oargs.nfargs != 4) |
174 |
|
objerror(so, USER, "bad # arguments"); |
175 |
|
if (so->oargs.farg[3] <= FTINY) |
176 |
< |
objerror(so, USER, "illegal radius"); |
176 |
> |
objerror(so, USER, "illegal source radius"); |
177 |
> |
src->sflags |= SCIR; |
178 |
|
VCOPY(src->sloc, so->oargs.farg); |
179 |
|
src->srad = so->oargs.farg[3]; |
180 |
|
src->ss2 = PI * src->srad * src->srad; |
181 |
|
for (i = 0; i < 3; i++) |
182 |
|
src->ss[SU][i] = src->ss[SV][i] = src->ss[SW][i] = 0.0; |
183 |
|
for (i = 0; i < 3; i++) |
184 |
< |
src->ss[i][i] = .7236 * so->oargs.farg[3]; |
184 |
> |
src->ss[i][i] = 0.7236 * so->oargs.farg[3]; |
185 |
|
} |
186 |
|
|
187 |
|
|
196 |
|
src->so = so; |
197 |
|
/* get the ring */ |
198 |
|
co = getcone(so, 0); |
199 |
+ |
if (CO_R1(co) <= FTINY) |
200 |
+ |
objerror(so, USER, "illegal source radius"); |
201 |
|
VCOPY(src->sloc, CO_P0(co)); |
202 |
|
if (CO_R0(co) > 0.0) |
203 |
< |
objerror(so, USER, "cannot hit center"); |
204 |
< |
src->sflags |= SFLAT; |
203 |
> |
objerror(so, USER, "cannot hit source center"); |
204 |
> |
src->sflags |= (SFLAT|SCIR); |
205 |
|
VCOPY(src->snorm, co->ad); |
206 |
|
src->srad = CO_R1(co); |
207 |
|
src->ss2 = PI * src->srad * src->srad; |
221 |
|
src->so = so; |
222 |
|
/* get the cylinder */ |
223 |
|
co = getcone(so, 0); |
224 |
+ |
if (CO_R0(co) <= FTINY) |
225 |
+ |
objerror(so, USER, "illegal source radius"); |
226 |
|
if (CO_R0(co) > .2*co->al) /* heuristic constraint */ |
227 |
|
objerror(so, WARNING, "source aspect too small"); |
228 |
|
src->sflags |= SCYL; |
256 |
|
return(ns); |
257 |
|
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
258 |
|
return(NULL); |
259 |
+ |
if (m->oargs.farg[3] <= FTINY) |
260 |
+ |
objerror(m, USER, "zero angle"); |
261 |
|
ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
262 |
|
VCOPY(ns->aim, m->oargs.farg+4); |
263 |
|
if ((ns->flen = normalize(ns->aim)) == 0.0) |
399 |
|
{ |
400 |
|
FVECT cent, c1, c2; |
401 |
|
double rad2, d; |
393 |
– |
register int i; |
402 |
|
/* move centers to common plane */ |
403 |
|
d = DOT(sp1->aim, dir); |
404 |
< |
for (i = 0; i < 3; i++) |
397 |
< |
c1[i] = sp1->aim[i] - d*dir[i]; |
404 |
> |
VSUM(c1, sp1->aim, dir, -d); |
405 |
|
d = DOT(sp2->aim, dir); |
406 |
< |
for (i = 0; i < 3; i++) |
400 |
< |
c2[i] = sp2->aim[i] - d*dir[i]; |
406 |
> |
VSUM(c2, sp2->aim, dir, -d); |
407 |
|
/* compute overlap */ |
408 |
|
rad2 = intercircle(cent, c1, c2, sp1->siz/PI, sp2->siz/PI); |
409 |
|
if (rad2 <= FTINY) |
439 |
|
{ |
440 |
|
FVECT onorm; |
441 |
|
double offs, d, dist; |
436 |
– |
register int i; |
442 |
|
|
443 |
|
offs = getplaneq(onorm, op); |
444 |
|
d = -DOT(onorm, sp->aim); |
447 |
|
dist = (DOT(pos, onorm) - offs)/d; |
448 |
|
if (dist < 0.) |
449 |
|
return(0.); |
450 |
< |
for (i = 0; i < 3; i++) |
446 |
< |
oc[i] = pos[i] + dist*sp->aim[i]; |
450 |
> |
VSUM(oc, pos, sp->aim, dist); |
451 |
|
return(sp->siz*dist*dist/PI/(d*d)); |
452 |
|
} |
453 |
|
|
461 |
|
{ |
462 |
|
FVECT onorm; |
463 |
|
double offs, d, dist; |
460 |
– |
register int i; |
464 |
|
|
465 |
|
offs = getplaneq(onorm, op); |
466 |
|
d = -DOT(onorm, dir); |
467 |
|
if (d >= -FTINY && d <= FTINY) |
468 |
|
return(0.); |
469 |
|
dist = (DOT(sp->aim, onorm) - offs)/d; |
470 |
< |
for (i = 0; i < 3; i++) |
468 |
< |
oc[i] = sp->aim[i] + dist*dir[i]; |
470 |
> |
VSUM(oc, sp->aim, dir, dist); |
471 |
|
return(sp->siz/PI/(d*d)); |
472 |
|
} |
473 |
|
|
480 |
|
{ |
481 |
|
double a2, d2, l; |
482 |
|
FVECT disp; |
481 |
– |
register int i; |
483 |
|
|
484 |
< |
for (i = 0; i < 3; i++) |
484 |
< |
disp[i] = c2[i] - c1[i]; |
484 |
> |
VSUB(disp, c2, c1); |
485 |
|
d2 = DOT(disp,disp); |
486 |
|
/* circle within overlap? */ |
487 |
|
if (r1s < r2s) { |
501 |
|
return(0.); |
502 |
|
/* overlap, compute center */ |
503 |
|
l = sqrt((r1s - a2)/d2); |
504 |
< |
for (i = 0; i < 3; i++) |
505 |
< |
cc[i] = c1[i] + l*disp[i]; |
504 |
> |
VSUM(cc, c1, disp, l); |
505 |
|
return(a2); |
506 |
|
} |