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root/radiance/ray/src/rt/srcsupp.c
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Comparing ray/src/rt/srcsupp.c (file contents):
Revision 2.8 by greg, Tue Nov 7 12:40:30 1995 UTC vs.
Revision 2.16 by greg, Mon Feb 26 21:16:02 2007 UTC

# Line 1 | Line 1
1 – /* Copyright (c) 1995 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"
# Line 18 | Line 19 | static char SCCSid[] = "$SunId$ LBL";
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 */
# Line 26 | Line 27 | 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};
# Line 56 | Line 54 | newsource()                    /* allocate new source in our array */
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 */
63 >        source[nsources].ntests = 2;    /* initial hit probability = 50% */
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   {
# Line 86 | Line 88 | register SRCREC  *src;
88   }
89  
90  
91 + void
92   fsetsrc(src, so)                        /* set a face as a source */
93   register SRCREC  *src;
94   OBJREC  *so;
# Line 98 | Line 101 | OBJREC  *so;
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;
# Line 106 | Line 111 | OBJREC  *so;
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;
# Line 129 | Line 134 | OBJREC  *so;
134   }
135  
136  
137 + void
138   ssetsrc(src, so)                        /* set a source as a source */
139   register SRCREC  *src;
140   register OBJREC  *so;
# Line 155 | Line 161 | register OBJREC  *so;
161   }
162  
163  
164 + void
165   sphsetsrc(src, so)                      /* set a sphere as a source */
166   register SRCREC  *src;
167   register OBJREC  *so;
# Line 166 | Line 173 | register OBJREC  *so;
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          VCOPY(src->sloc, so->oargs.farg);
178          src->srad = so->oargs.farg[3];
179          src->ss2 = PI * src->srad * src->srad;
# Line 177 | Line 184 | register OBJREC  *so;
184   }
185  
186  
187 + void
188   rsetsrc(src, so)                        /* set a ring (disk) as a source */
189   register SRCREC  *src;
190   OBJREC  *so;
# Line 187 | Line 195 | OBJREC  *so;
195          src->so = so;
196                                                  /* get the ring */
197          co = getcone(so, 0);
198 +        if (CO_R1(co) <= FTINY)
199 +                objerror(so, USER, "illegal source radius");
200          VCOPY(src->sloc, CO_P0(co));
201          if (CO_R0(co) > 0.0)
202 <                objerror(so, USER, "cannot hit center");
202 >                objerror(so, USER, "cannot hit source center");
203          src->sflags |= SFLAT;
204          VCOPY(src->snorm, co->ad);
205          src->srad = CO_R1(co);
# Line 198 | Line 208 | OBJREC  *so;
208   }
209  
210  
211 + void
212   cylsetsrc(src, so)                      /* set a cylinder as a source */
213   register SRCREC  *src;
214   OBJREC  *so;
# Line 209 | Line 220 | OBJREC  *so;
220          src->so = so;
221                                                  /* get the cylinder */
222          co = getcone(so, 0);
223 +        if (CO_R0(co) <= FTINY)
224 +                objerror(so, USER, "illegal source radius");
225          if (CO_R0(co) > .2*co->al)              /* heuristic constraint */
226                  objerror(so, WARNING, "source aspect too small");
227          src->sflags |= SCYL;
# Line 242 | Line 255 | register OBJREC  *m;
255                  return(ns);
256          if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL)
257                  return(NULL);
258 +        if (m->oargs.farg[3] <= FTINY)
259 +                objerror(m, USER, "zero angle");
260          ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3]));
261          VCOPY(ns->aim, m->oargs.farg+4);
262          if ((ns->flen = normalize(ns->aim)) == 0.0)
# Line 251 | Line 266 | register OBJREC  *m;
266   }
267  
268  
269 + int
270   spotout(r, s)                   /* check if we're outside spot region */
271   register RAY  *r;
272   register SPOT  *s;
# Line 351 | Line 367 | OBJREC  *op;
367   }
368  
369  
370 + int
371   commonspot(sp1, sp2, org)       /* set sp1 to intersection of sp1 and sp2 */
372   register SPOT  *sp1, *sp2;
373   FVECT  org;
# Line 374 | Line 391 | FVECT  org;
391   }
392  
393  
394 + int
395   commonbeam(sp1, sp2, dir)       /* set sp1 to intersection of sp1 and sp2 */
396   register SPOT  *sp1, *sp2;
397   FVECT  dir;
# Line 398 | Line 416 | FVECT  dir;
416   }
417  
418  
419 + int
420   checkspot(sp, nrm)              /* check spotlight for behind source */
421   register SPOT  *sp;     /* spotlight */
422   FVECT  nrm;             /* source surface normal */

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