FnExpressionMath.h

#ifndef FnGeolibServicesExpressionMath_H
#define FnGeolibServicesExpressionMath_H

#include <string>

#include <FnGeolibServices/FnGeolibServicesAPI.h>
#include <FnGeolibServices/ns.h>
#include <FnGeolibServices/suite/FnExpressionMathSuite.h>

#include <FnPluginSystem/FnPluginSystem.h>

FNGEOLIBSERVICES_NAMESPACE_ENTER
{
    class FNGEOLIBSERVICES_API FnExpressionMath
    {
    public:
        static int    clamp(int value, int a, int b);
        static float  clamp(float value, float a, float b);
        static double clamp(double value, double a, double b);

        static float  lerp(float mix, float a, float b);
        static double lerp(double mix, double a, double b);

        static float  smoothstep(float t);
        static double smoothstep(double t);

        static float  fit(float value, float oldmin, float oldmax,
                float newmin, float newmax);
        static double fit(double value, double oldmin, double oldmax,
                double newmin, double newmax);

        static float  cfit(float value, float oldmin, float oldmax,
                float newmin, float newmax);
        static double cfit(double value, double oldmin, double oldmax,
                double newmin, double newmax);

        static float  softcfit(float value, float oldmin, float oldmax,
                float newmin, float newmax);
        static double softcfit(double value, double oldmin, double oldmax,
                double newmin, double newmax);

        enum RetimeHoldMode
        {
            // Hold the first/last frame of the sequence. 1111 1234 4444
            RETIME_FREEZE = kFnKatExpressionMathRetimeFreeze,

            // Repeat the sequence.                       1234 1234 1234
            RETIME_REPEAT = kFnKatExpressionMathRetimeRepeat,

            // Mirror the sequence;                       3432 1234 3212
            RETIME_MIRROR = kFnKatExpressionMathRetimeMirror
        };

        static double retime(double frame, double start, double end,
                RetimeHoldMode inMode, RetimeHoldMode outMode);

        static float  randval(float min, float max, int seed);
        static double randval(double min, double max, int seed);

        static float noise(float x);
        static float noise(float x, float y);
        static float noise(float x, float y, float z);
        static float noise(float x, float y, float z, float w);

        static float snoise(float x);
        static float snoise(float x, float y);
        static float snoise(float x, float y, float z);
        static float snoise(float x, float y, float z, float w);

        static int32_t stablehash(const std::string &cacheID);

    private:
        FnExpressionMath();

        static const FnExpressionMathHostSuite_v1 *_getSuite();
    };
}
FNGEOLIBSERVICES_NAMESPACE_EXIT


#endif // FnGeolibServicesExpressionMath_H