/*****************************************************************  Prototypes for the fractional Brownian motion algorithm. These  functions were originally the work of F. Kenton Musgrave.  For  documentation of the different functions please refer to the book:  "Texturing and modeling: a procedural approach"  by David S. Ebert et. al.  ******************************************************************/#ifndef _fbm_h#define _fbm_h#include  <math.h>#ifdef __cplusplusextern "C" {#endif#define TRUE    1#define FALSE   0typedef struct {    double x;    double y;    double z;} Vector;    float noise3(float vec[]);double fBm( Vector point, double H, double lacunarity, double octaves, 	    int init );#endif#ifdef __cplusplus}#endif