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root/Development/ray/src/common/urand.c
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Comparing ray/src/common/urand.c (file contents):
Revision 1.1 by greg, Fri May 17 12:55:27 1991 UTC vs.
Revision 1.7 by greg, Mon Aug 12 13:07:02 1991 UTC

# Line 5 | Line 5 | static char SCCSid[] = "$SunId$ LBL";
5   #endif
6  
7   /*
8 < * Uncorrelated (anticorrelated) random function
8 > * Anticorrelated random function due to Christophe Schlick
9   */
10  
11   #include  "random.h"
# Line 44 | Line 44 | int  size;
44                          else
45                                  urperm[i+offset]++;
46                  }
47 + }
48 +
49 +
50 + int
51 + ilhash(d, n)                    /* hash a set of integer values */
52 + register int  *d;
53 + register int  n;
54 + {
55 +        static int  tab[8] = {13623,353,1637,5831,2314,3887,5832,8737};
56 +        register int  hval;
57 +
58 +        hval = 0;
59 +        while (n-- > 0)
60 +                hval += *d++ * tab[n&7];
61 +        return(hval);
62   }

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