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root/radiance/ray/src/rt/ambient.c
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Comparing ray/src/rt/ambient.c (file contents):
Revision 2.73 by greg, Wed Apr 16 20:32:00 2014 UTC vs.
Revision 2.74 by greg, Sat Apr 19 02:39:44 2014 UTC

# Line 51 | Line 51 | static int  nunflshed = 0;     /* number of unflushed ambi
51   #define MAX_SORT_INTVL  (SORT_INTVL<<6)
52   #endif
53  
54 +
55 + static double  qambacc = 0.;            /* ambient accuracy to the 1/4 power */
56   static double  avsum = 0.;              /* computed ambient value sum (log) */
57   static unsigned int  navsum = 0;        /* number of values in avsum */
58   static unsigned int  nambvals = 0;      /* total number of indirect values */
# Line 132 | Line 134 | setambacc(                             /* set ambient accuracy */
134          if (newa < 0.0)
135                  newa = 0.0;
136          ambdiff = fabs(newa - ambacc);
137 <        if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0)
138 <                sortambvals(1);                 /* rebuild tree */
137 >        if (ambdiff >= .01 && (ambacc = newa) > FTINY) {
138 >                qambacc = sqrt(sqrt(ambacc));
139 >                if (nambvals > 0)
140 >                        sortambvals(1);         /* rebuild tree */
141 >        }
142   }
143  
144  
# Line 529 | Line 534 | avinsert(                              /* insert ambient value in our tree */
534          at = &atrunk;
535          VCOPY(ck0, thescene.cuorg);
536          s = thescene.cusize;
537 <        while (s*(OCTSCALE/2) > av->rad[1]*ambacc) {
537 >        while (s*(OCTSCALE/2) > av->rad[1]*qambacc) {
538                  if (at->kid == NULL)
539                          if ((at->kid = newambtree()) == NULL)
540                                  error(SYSTEM, "out of memory in avinsert");

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