| 1 | /*****************************************************************
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| 2 |
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| 3 | Prototypes for the fractional Brownian motion algorithm. These
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| 4 | functions were originally the work of F. Kenton Musgrave. For
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| 5 | documentation of the different functions please refer to the book:
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| 6 | "Texturing and modeling: a procedural approach"
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| 7 | by David S. Ebert et. al.
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| 8 |
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| 9 | ******************************************************************/
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| 10 |
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| 11 | #ifndef _fbm_h
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| 12 | #define _fbm_h
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| 13 |
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| 14 | #include <math.h>
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| 15 |
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| 16 | #ifdef __cplusplus
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| 17 | extern "C" {
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| 18 | #endif
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| 19 |
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| 20 | //#define TRUE 1
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| 21 | //#define FALSE 0
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| 22 |
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| 23 | typedef struct {
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| 24 | double x;
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| 25 | double y;
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| 26 | double z;
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| 27 | } Vector;
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| 28 |
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| 29 | float noise3(float vec[]);
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| 30 | double fBm( Vector point, double H, double lacunarity, double octaves,
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