CWE-ou-minkata/Sources/Plasma/PubUtilLib/plInterp/hsInterp.h

/*==LICENSE==*

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*==LICENSE==*/
#ifndef HSINTERP_inc
#define HSINTERP_inc

#include "HeadSpin.h"
#include "hsKeys.h"

///////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////

//
// Performs interpolation of keyframes & values.
// t param should be 0-1
//
struct hsColorRGBA;
class hsAffineParts;
class hsInterp
{
public:
    enum IgnoreFlags
    {
        kIgnoreAlpha        = 0x1,
        kIgnoreLastMatRow   = 0x2,
        kIgnorePartsPos     = 0x4,
        kIgnorePartsRot     = 0x8,
        kIgnorePartsScale   = 0x10,     // result gets no scale
        kIgnorePartsDet     = 0x20,
        kPreservePartsScale = 0x40      // result gets the scale of key1
    };

    static void BezScalarEval(const float value1, const float outTan,
                              const float value2, const float inTan,
                              const float t, const float scale, float *result);
    static void BezInterp(const hsBezPoint3Key *k1, const hsBezPoint3Key *k2, const float t, hsScalarTriple *result);
    static void BezInterp(const hsBezScalarKey *k1, const hsBezScalarKey *k2, const float t, float *result);
    static void BezInterp(const hsBezScaleKey *k1, const hsBezScaleKey *k2, const float t, hsScaleValue *result);

    // simple linear interpolation
    static void LinInterp(const float k1, const float k2, const float t, float *result);
    static void LinInterp(const hsScalarTriple *k1, const hsScalarTriple *k2, const float t, hsScalarTriple *result);
    static void LinInterp(const hsColorRGBA *k1, const hsColorRGBA *k2, const float t, hsColorRGBA *result, uint32_t ignoreFlags=0);
    static void LinInterp(const hsMatrix33 *k1, const hsMatrix33 *k2, const float t, hsMatrix33 *result, uint32_t ignoreFlags=0);
    static void LinInterp(const hsMatrix44 *mat1, const hsMatrix44 *mat2, const float t, hsMatrix44 *out, uint32_t ignoreFlags=0);
    static void LinInterp(const hsQuat *k1, const hsQuat *k2, const float t, hsQuat *result);
    static void LinInterp(const hsScaleValue *k1, const hsScaleValue *k2, const float t, hsScaleValue *result);
    static void LinInterp(const hsAffineParts *k1, const hsAffineParts *k2, const float t, hsAffineParts *result, uint32_t ignoreFlags=0);

    // Given a time value, find the enclosing keyframes and normalize time (0-1)
    static void GetBoundaryKeyFrames(float time, uint32_t numKeys, void *keys, 
        uint32_t keySize, hsKeyFrame **kF1, hsKeyFrame **kF2, uint32_t *lastKeyIdx, float *p, bool forwards);

};

#define MAX_FRAMES_PER_SEC 30.0f
#define MAX_TICKS_PER_FRAME 160.0f
#define MAX_TICKS_PER_SEC (MAX_TICKS_PER_FRAME*MAX_FRAMES_PER_SEC)

#endif  // #ifndef HSINTERP_inc