#ifndef NOISE_HEADER
#define NOISE_HEADER
+#include "debug.h"
+
+class PseudoRandom
+{
+public:
+ PseudoRandom(): m_next(0)
+ {
+ }
+ PseudoRandom(int seed): m_next(seed)
+ {
+ }
+ void seed(int seed)
+ {
+ m_next = seed;
+ }
+ // Returns 0...32767
+ int next()
+ {
+ m_next = m_next * 1103515245 + 12345;
+ return((unsigned)(m_next/65536) % 32768);
+ }
+ int range(int min, int max)
+ {
+ if(max-min > 32768/10)
+ {
+ //dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl;
+ assert(0);
+ }
+ if(min > max)
+ {
+ assert(0);
+ return max;
+ }
+ return (next()%(max-min+1))+min;
+ }
+private:
+ int m_next;
+};
+
double easeCurve(double t);
// Return value: -1 ... 1
double noise2d(int x, int y, int seed);
+double noise3d(int x, int y, int z, int seed);
double noise2d_gradient(double x, double y, int seed);
+double noise3d_gradient(double x, double y, double z, int seed);
double noise2d_perlin(double x, double y, int seed,
int octaves, double persistence);
+double noise2d_perlin_abs(double x, double y, int seed,
+ int octaves, double persistence);
+
+double noise3d_perlin(double x, double y, double z, int seed,
+ int octaves, double persistence);
+
+double noise3d_perlin_abs(double x, double y, double z, int seed,
+ int octaves, double persistence);
+
+enum NoiseType
+{
+ NOISE_CONSTANT_ONE,
+ NOISE_PERLIN,
+ NOISE_PERLIN_ABS,
+ NOISE_PERLIN_CONTOUR,
+ NOISE_PERLIN_CONTOUR_FLIP_YZ,
+};
+
+struct NoiseParams
+{
+ NoiseType type;
+ int seed;
+ int octaves;
+ double persistence;
+ double pos_scale;
+ double noise_scale; // Useful for contour noises
+
+ NoiseParams(NoiseType type_=NOISE_PERLIN, int seed_=0,
+ int octaves_=3, double persistence_=0.5,
+ double pos_scale_=100.0, double noise_scale_=1.0):
+ type(type_),
+ seed(seed_),
+ octaves(octaves_),
+ persistence(persistence_),
+ pos_scale(pos_scale_),
+ noise_scale(noise_scale_)
+ {
+ }
+};
+
+double noise3d_param(const NoiseParams ¶m, double x, double y, double z);
+
+class NoiseBuffer
+{
+public:
+ NoiseBuffer();
+ ~NoiseBuffer();
+
+ void clear();
+ void create(const NoiseParams ¶m,
+ double first_x, double first_y, double first_z,
+ double last_x, double last_y, double last_z,
+ double samplelength_x, double samplelength_y, double samplelength_z);
+ void multiply(const NoiseParams ¶m);
+ // Deprecated
+ void create(int seed, int octaves, double persistence,
+ bool abs,
+ double first_x, double first_y, double first_z,
+ double last_x, double last_y, double last_z,
+ double samplelength_x, double samplelength_y, double samplelength_z);
+
+ void intSet(int x, int y, int z, double d);
+ void intMultiply(int x, int y, int z, double d);
+ double intGet(int x, int y, int z);
+ double get(double x, double y, double z);
+ //bool contains(double x, double y, double z);
+
+private:
+ double *m_data;
+ double m_start_x, m_start_y, m_start_z;
+ double m_samplelength_x, m_samplelength_y, m_samplelength_z;
+ int m_size_x, m_size_y, m_size_z;
+};
+
#endif