95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
#ifndef NOISEGENERATOR_H
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#define NOISEGENERATOR_H
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#include "basics_global.h"
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#define MAX_LEVEL_COUNT 30
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#include "NoiseState.h"
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namespace paysages {
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namespace basics {
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class BASICSSHARED_EXPORT NoiseGenerator {
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public:
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typedef enum { NOISE_FUNCTION_PERLIN, NOISE_FUNCTION_SIMPLEX, NOISE_FUNCTION_CUSTOM } NoiseFunctionAlgorithm;
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typedef struct {
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NoiseFunctionAlgorithm algorithm;
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double ridge_factor; /* -0.5;0.5 */
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double curve_factor; /* -1.0;1.0 */
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} NoiseFunction;
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typedef struct {
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double frequency;
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double amplitude;
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double minvalue;
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} NoiseLevel;
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public:
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NoiseGenerator();
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virtual ~NoiseGenerator();
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virtual void save(PackStream *stream) const;
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virtual void load(PackStream *stream);
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virtual void copy(NoiseGenerator *destination) const;
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virtual void validate();
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inline const NoiseState &getState() const {
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return state;
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}
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void setState(const NoiseState &state);
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void randomizeOffsets();
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NoiseFunction getFunction();
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void setCustomFunction(double (*func1d)(double x), double (*func2d)(double x, double y),
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double (*func3d)(double x, double y, double z));
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void setFunction(NoiseFunction *function);
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void setFunctionParams(NoiseFunctionAlgorithm algorithm, double ridge_factor, double curve_factor);
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void forceValue(double value);
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void getRange(double *minvalue, double *maxvalue) const;
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int getLevelCount() const;
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void clearLevels();
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void addLevel(NoiseLevel level);
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void addLevelSimple(double scaling, double minvalue, double maxvalue);
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void addLevels(int level_count, NoiseLevel start_level, double scaling_factor, double amplitude_factor,
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double center_factor);
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void addLevelsSimple(int level_count, double scaling, double minvalue, double maxvalue, double center_factor);
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void removeLevel(int level);
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int getLevel(int level, NoiseLevel *params) const;
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void setLevel(int index, NoiseLevel level);
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void setLevelSimple(int index, double scaling, double minvalue, double maxvalue);
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void normalizeAmplitude(double minvalue, double maxvalue, int adjust_scaling);
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double get1DLevel(int level, double x) const;
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double get1DTotal(double x) const;
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double get1DDetail(double x, double detail) const;
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double get2DLevel(int level, double x, double y) const;
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double get2DTotal(double x, double y) const;
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double get2DDetail(double x, double y, double detail) const;
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double get3DLevel(int level, double x, double y, double z) const;
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double get3DTotal(double x, double y, double z) const;
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double get3DDetail(double x, double y, double z, double detail) const;
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private:
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double _get1DLevelValue(const NoiseLevel *level, const NoiseState::NoiseOffset &offset, double x) const;
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double _get2DLevelValue(const NoiseLevel *level, const NoiseState::NoiseOffset &offset, double x, double y) const;
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double _get3DLevelValue(const NoiseLevel *level, const NoiseState::NoiseOffset &offset, double x, double y,
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double z) const;
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NoiseFunction function;
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double height_offset;
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int level_count;
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NoiseLevel levels[MAX_LEVEL_COUNT];
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NoiseState state;
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double _min_value;
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double _max_value;
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double (*_func_noise_1d)(double x);
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double (*_func_noise_2d)(double x, double y);
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double (*_func_noise_3d)(double x, double y, double z);
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};
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}
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}
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#endif // NOISEGENERATOR_H
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