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root/radiance/ray/src/common/random.h
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Comparing ray/src/common/random.h (file contents):
Revision 2.2 by greg, Mon Sep 21 12:02:27 1992 UTC vs.
Revision 2.5 by gregl, Mon Dec 1 09:55:00 1997 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1992 Regents of the University of California */
1 > /* Copyright (c) 1997 Silicon Graphics, Inc. */
2  
3 < /* SCCSid "$SunId$ LBL" */
3 > /* SCCSid "$SunId$ SGI" */
4  
5   /*
6   *  random.h - header file for random(3) and urand() function.
# Line 10 | Line 10
10  
11   #ifdef  MSDOS
12  
13 < #define random          rand
13 > #define random()        ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4)
14  
15   #define frandom()       (rand()*(1./32768.))
16  
# Line 32 | Line 32 | extern double  drand48();
32   #endif
33   #endif
34  
35 + #ifdef  MC
36 +
37 + #define  urand(i)       frandom()
38 + #define  initurand(n)   (n)
39 +
40 + #else
41 +
42 + extern short    *urperm;
43 + extern int      urmask, initurand();
44 +
45   #define  urand(i)       ((urperm[(i)&urmask]+frandom())/(urmask+1))
46  
47 < extern short  *urperm;
38 < extern int  urmask;
47 > #endif

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