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root/Development/ray/src/util/glarendx.c
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Comparing ray/src/util/glarendx.c (file contents):
Revision 2.8 by schorsch, Mon Jun 30 14:59:13 2003 UTC vs.
Revision 2.9 by greg, Wed Nov 19 16:21:28 2003 UTC

# Line 310 | Line 310 | struct glare_dir       *gd;
310   {
311          register struct glare_src       *gs;
312          FVECT   mydir,testdir[7],vhor;
313 <        double  r,omega,p[7],sum;
313 >        double  r,posn,omega,p[7],sum;
314          int     i,n;
315  
316          spinvector(mydir, midview.vdir, midview.vup, gd->ang);
# Line 332 | Line 332 | struct glare_dir       *gd;
332                  fvsum(testdir[4],testdir[4],midview.vup,-0.866*r);
333                  for (i = 0; i < 7; i++) {
334                          normalize(testdir[i]);
335 <                        p[i] = pow(posindex(testdir[i],mydir,midview.vup),-2.0);
336 <                        if (p[i] <= FTINY) p[i] = 0.0;
335 >                        posn = posindex(testdir[i],mydir,midview.vup);
336 >                        if (posn <= FTINY)
337 >                                p[i] = 0.0;
338 >                        else
339 >                                p[i] = 1./(posn*posn);
340                  }
341                  r = 1-gs->dom/2./PI;
342                  omega = gs->dom*p[0];

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