1 |
– |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
|
/* |
5 |
|
* Support routines for source objects and materials |
6 |
+ |
* |
7 |
+ |
* External symbols declared in source.h |
8 |
|
*/ |
9 |
|
|
10 |
+ |
#include "copyright.h" |
11 |
+ |
|
12 |
|
#include "ray.h" |
13 |
|
|
14 |
|
#include "otypes.h" |
19 |
|
|
20 |
|
#include "face.h" |
21 |
|
|
22 |
< |
#define SRCINC 4 /* realloc increment for array */ |
22 |
> |
#define SRCINC 8 /* realloc increment for array */ |
23 |
|
|
24 |
|
SRCREC *source = NULL; /* our list of sources */ |
25 |
|
int nsources = 0; /* the number of sources */ |
27 |
|
SRCFUNC sfun[NUMOTYPE]; /* source dispatch table */ |
28 |
|
|
29 |
|
|
30 |
+ |
void |
31 |
|
initstypes() /* initialize source dispatch table */ |
32 |
|
{ |
33 |
|
extern VSMATERIAL mirror_vs, direct1_vs, direct2_vs; |
32 |
– |
extern int fsetsrc(), ssetsrc(), sphsetsrc(), cylsetsrc(), rsetsrc(); |
33 |
– |
extern int nopart(), flatpart(), cylpart(); |
34 |
– |
extern double fgetplaneq(), rgetplaneq(); |
35 |
– |
extern double fgetmaxdisk(), rgetmaxdisk(); |
34 |
|
static SOBJECT fsobj = {fsetsrc, flatpart, fgetplaneq, fgetmaxdisk}; |
35 |
|
static SOBJECT ssobj = {ssetsrc, nopart}; |
36 |
|
static SOBJECT sphsobj = {sphsetsrc, nopart}; |
54 |
|
if (nsources == 0) |
55 |
|
source = (SRCREC *)malloc(SRCINC*sizeof(SRCREC)); |
56 |
|
else if (nsources%SRCINC == 0) |
57 |
< |
source = (SRCREC *)realloc((char *)source, |
57 |
> |
source = (SRCREC *)realloc((void *)source, |
58 |
|
(unsigned)(nsources+SRCINC)*sizeof(SRCREC)); |
59 |
|
if (source == NULL) |
60 |
|
return(-1); |
61 |
|
source[nsources].sflags = 0; |
62 |
|
source[nsources].nhits = 1; |
63 |
|
source[nsources].ntests = 2; /* initial hit probability = 1/2 */ |
64 |
+ |
#if SHADCACHE |
65 |
+ |
source[nsources].obscache = NULL; |
66 |
+ |
#endif |
67 |
|
return(nsources++); |
68 |
|
} |
69 |
|
|
70 |
|
|
71 |
+ |
void |
72 |
|
setflatss(src) /* set sampling for a flat source */ |
73 |
|
register SRCREC *src; |
74 |
|
{ |
88 |
|
} |
89 |
|
|
90 |
|
|
91 |
+ |
void |
92 |
|
fsetsrc(src, so) /* set a face as a source */ |
93 |
|
register SRCREC *src; |
94 |
|
OBJREC *so; |
122 |
|
} |
123 |
|
src->srad = sqrt(src->srad); |
124 |
|
/* compute size vectors */ |
125 |
< |
if (f->nv == 4 || (f->nv == 5 && /* parallelogram case */ |
123 |
< |
dist2(VERTEX(f,0),VERTEX(f,4)) <= FTINY*FTINY)) |
125 |
> |
if (f->nv == 4) /* parallelogram case */ |
126 |
|
for (j = 0; j < 3; j++) { |
127 |
|
src->ss[SU][j] = .5*(VERTEX(f,1)[j]-VERTEX(f,0)[j]); |
128 |
|
src->ss[SV][j] = .5*(VERTEX(f,3)[j]-VERTEX(f,0)[j]); |
132 |
|
} |
133 |
|
|
134 |
|
|
135 |
+ |
void |
136 |
|
ssetsrc(src, so) /* set a source as a source */ |
137 |
|
register SRCREC *src; |
138 |
|
register OBJREC *so; |
159 |
|
} |
160 |
|
|
161 |
|
|
162 |
+ |
void |
163 |
|
sphsetsrc(src, so) /* set a sphere as a source */ |
164 |
|
register SRCREC *src; |
165 |
|
register OBJREC *so; |
182 |
|
} |
183 |
|
|
184 |
|
|
185 |
+ |
void |
186 |
|
rsetsrc(src, so) /* set a ring (disk) as a source */ |
187 |
|
register SRCREC *src; |
188 |
|
OBJREC *so; |
204 |
|
} |
205 |
|
|
206 |
|
|
207 |
+ |
void |
208 |
|
cylsetsrc(src, so) /* set a cylinder as a source */ |
209 |
|
register SRCREC *src; |
210 |
|
OBJREC *so; |
258 |
|
} |
259 |
|
|
260 |
|
|
261 |
< |
spotout(r, s, dist) /* check if we're outside spot region */ |
261 |
> |
int |
262 |
> |
spotout(r, s) /* check if we're outside spot region */ |
263 |
|
register RAY *r; |
264 |
|
register SPOT *s; |
258 |
– |
int dist; |
265 |
|
{ |
266 |
|
double d; |
267 |
|
FVECT vd; |
268 |
|
|
269 |
|
if (s == NULL) |
270 |
|
return(0); |
271 |
< |
if (dist) { /* distant source */ |
271 |
> |
if (s->flen < -FTINY) { /* distant source */ |
272 |
|
vd[0] = s->aim[0] - r->rorg[0]; |
273 |
|
vd[1] = s->aim[1] - r->rorg[1]; |
274 |
|
vd[2] = s->aim[2] - r->rorg[2]; |
359 |
|
} |
360 |
|
|
361 |
|
|
362 |
+ |
int |
363 |
|
commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
364 |
|
register SPOT *sp1, *sp2; |
365 |
|
FVECT org; |
383 |
|
} |
384 |
|
|
385 |
|
|
386 |
+ |
int |
387 |
|
commonbeam(sp1, sp2, dir) /* set sp1 to intersection of sp1 and sp2 */ |
388 |
|
register SPOT *sp1, *sp2; |
389 |
|
FVECT dir; |
408 |
|
} |
409 |
|
|
410 |
|
|
411 |
+ |
int |
412 |
|
checkspot(sp, nrm) /* check spotlight for behind source */ |
413 |
|
register SPOT *sp; /* spotlight */ |
414 |
|
FVECT nrm; /* source surface normal */ |
504 |
|
for (i = 0; i < 3; i++) |
505 |
|
cc[i] = c1[i] + l*disp[i]; |
506 |
|
return(a2); |
498 |
– |
} |
499 |
– |
|
500 |
– |
|
501 |
– |
sourcehit(r) /* check to see if ray hit distant source */ |
502 |
– |
register RAY *r; |
503 |
– |
{ |
504 |
– |
int first, last; |
505 |
– |
register int i; |
506 |
– |
|
507 |
– |
if (r->rsrc >= 0) { /* check only one if aimed */ |
508 |
– |
first = last = r->rsrc; |
509 |
– |
} else { /* otherwise check all */ |
510 |
– |
first = 0; last = nsources-1; |
511 |
– |
} |
512 |
– |
for (i = first; i <= last; i++) |
513 |
– |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
514 |
– |
/* |
515 |
– |
* Check to see if ray is within |
516 |
– |
* solid angle of source. |
517 |
– |
*/ |
518 |
– |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
519 |
– |
<= source[i].ss2) { |
520 |
– |
r->ro = source[i].so; |
521 |
– |
if (!(source[i].sflags & SSKIP)) |
522 |
– |
break; |
523 |
– |
} |
524 |
– |
|
525 |
– |
if (r->ro != NULL) { |
526 |
– |
for (i = 0; i < 3; i++) |
527 |
– |
r->ron[i] = -r->rdir[i]; |
528 |
– |
r->rod = 1.0; |
529 |
– |
r->rox = NULL; |
530 |
– |
return(1); |
531 |
– |
} |
532 |
– |
return(0); |
507 |
|
} |