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root/Development/ray/src/rt/source.c
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Comparing ray/src/rt/source.c (file contents):
Revision 1.40 by greg, Tue Jul 30 18:23:41 1991 UTC vs.
Revision 1.42 by greg, Mon Aug 12 08:20:49 1991 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1990 Regents of the University of California */
1 > /* Copyright (c) 1991 Regents of the University of California */
2  
3   #ifndef lint
4   static char SCCSid[] = "$SunId$ LBL";
# Line 164 | Line 164 | register int  sn;              /* source number */
164          if (source[sn].sflags & SDISTANT) {
165                  if (source[sn].sflags & SSPOT) {        /* check location */
166                          for (i = 0; i < 3; i++)
167 <                                vd[i] = sr->rorg[i] - source[sn].sl.s->aim[i];
167 >                                vd[i] = source[sn].sl.s->aim[i] - sr->rorg[i];
168                          d = DOT(sr->rdir,vd);
169 +                        if (d <= FTINY)
170 +                                return(0.0);
171                          d = DOT(vd,vd) - d*d;
172                          if (PI*d > source[sn].sl.s->siz)
173                                  return(0.0);
# Line 245 | Line 247 | RAY  *r;                       /* ray that hit surface */
247   int  (*f)();                    /* direct component coefficient function */
248   char  *p;                       /* data for f */
249   {
250 +        extern int  (*trace)();
251          extern double  pow();
252          register int  sn;
253          int  nshadcheck, ncnts;
# Line 314 | Line 317 | char  *p;                      /* data for f */
317                                  source[cntord[sn].sno].sflags & SFOLLOW )) {
318                                                  /* follow entire path */
319                          raycont(&sr);
320 +                        if (trace != NULL)
321 +                                (*trace)(&sr);  /* trace execution */
322                          if (bright(sr.rcol) <= FTINY)
323                                  continue;       /* missed! */
324                          copycolor(srccnt[cntord[sn].sno].val, sr.rcol);

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