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root/radiance/ray/src/common/dircode.c
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Comparing ray/src/common/dircode.c (file contents):
Revision 2.11 by greg, Wed Mar 4 02:55:43 2020 UTC vs.
Revision 2.13 by greg, Tue Apr 7 18:20:52 2020 UTC

# Line 9 | Line 9 | static const char RCSid[] = "$Id$";
9  
10   #include "rtmath.h"
11  
12 < #define DCSCALE         11584.7         /* (1<<13)*sqrt(2) - .5 */
12 > #define DCSCALE         11584.5         /* ((1<<13)-.5)*sqrt(2) */
13   #define FXNEG           01
14   #define FYNEG           02
15   #define FZNEG           04
# Line 61 | Line 61 | decodedir(FVECT dv, int32 dc)  /* decode a normalized d
61                  dv[0] = dv[1] = dv[2] = 0.;
62                  return;
63          }
64 <        d1 = ((dc>>F1SFT & FMASK)+.5)*(1./DCSCALE);
65 <        d2 = ((dc>>F2SFT & FMASK)+.5)*(1./DCSCALE);
64 >        d1 = (dc>>F1SFT & FMASK)*(1./DCSCALE);
65 >        d2 = (dc>>F2SFT & FMASK)*(1./DCSCALE);
66          der = sqrt(1. - d1*d1 - d2*d2);
67          if (dc & F1X) {
68                  dv[0] = d1;

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