1 /*****************************************************************

     2 

     3   Prototypes for the fractional Brownian motion algorithm. These

     4   functions were originally the work of F. Kenton Musgrave.  For

     5   documentation of the different functions please refer to the book:

     6   "Texturing and modeling: a procedural approach"

     7   by David S. Ebert et. al.

     8   

     9 ******************************************************************/

    10 

    11 #ifndef _fbm_h

    12 #define _fbm_h

    13 

    14 #include  <math.h>

    15 

    16 #ifdef __cplusplus

    17 extern "C" {

    18 #endif

    19 

    20 //#define TRUE    1

    21 //#define FALSE   0

    22 

    23 typedef struct {

    24     double x;

    25     double y;

    26     double z;

    27 } Vector;

    28     

    29 float noise3(float vec[]);

    30 double fBm( Vector point, double H, double lacunarity, double octaves, 

    31 	    int init );

    32 #endif

    33 

    34 #ifdef __cplusplus

    35 }

    36 #endif

    37 

    38 

    39 

    40