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root/Development/ray/src/rt/noise3.c
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Comparing ray/src/rt/noise3.c (file contents):
Revision 2.1 by greg, Tue Nov 12 17:09:23 1991 UTC vs.
Revision 2.4 by greg, Mon Aug 9 10:03:45 1993 UTC

# Line 14 | Line 14 | static char SCCSid[] = "$SunId$ LBL";
14   *     5/19/88  Added fractal noise function
15   */
16  
17 + #include  <math.h>
18  
19   #define  A              0
20   #define  B              1
# Line 40 | Line 41 | static char  fnoise_name[] = "fnoise3";
41   static char  hermite_name[] = "hermite";
42  
43   double  *noise3(), fnoise3(), argument(), frand();
44 + static  interpolate();
45  
46   static long  xlim[3][2];
47   static double  xarg[3];
48  
49 < #define  EPSILON        .0001           /* error allowed in fractal */
49 > #define  EPSILON        .001            /* error allowed in fractal */
50  
51   #define  frand3(x,y,z)  frand(17*(x)+23*(y)+29*(z))
52  
# Line 99 | Line 101 | double *
101   noise3(xnew)                    /* compute the noise function */
102   register double  xnew[3];
103   {
102 –        extern double  floor();
104          static double  x[3] = {-100000.0, -100000.0, -100000.0};
105          static double  f[4];
106  
# Line 156 | Line 157 | double
157   fnoise3(p)                      /* compute fractal noise function */
158   double  p[3];
159   {
159 –        double  floor();
160          long  t[3], v[3], beg[3];
161          double  fval[8], fc;
162          int  branch;

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