//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Keyframed animation header
//			shared between game and tools
//=============================================================================//

#ifndef KEYFRAME_H
#define KEYFRAME_H
#pragma once

class IPositionInterpolator {
   public:
    virtual void Release() = 0;

    virtual void GetDetails(char **outName, int *outMinKeyReq,
                            int *outMaxKeyReq) = 0;
    virtual void SetKeyPosition(int keyNum, Vector const &vPos) = 0;
    virtual void InterpolatePosition(float time, Vector &vOut) = 0;

    // Returns true if the key causes a change that changes the interpolated
    // positions.
    virtual bool ProcessKey(char const *pName, char const *pValue) = 0;
};

// Time modifiers.
int Motion_GetNumberOfTimeModifiers(void);
bool Motion_GetTimeModifierDetails(int timeInterpNum, const char **outName);
bool Motion_CalculateModifiedTime(float time, int timeModifierFuncNum,
                                  float *outNewTime);

// Position interpolators.
int Motion_GetNumberOfPositionInterpolators(void);
IPositionInterpolator *Motion_GetPositionInterpolator(int interpNum);

// Rotation interpolators.
int Motion_GetNumberOfRotationInterpolators(void);
bool Motion_GetRotationInterpolatorDetails(int rotInterpNum, char **outName,
                                           int *outMinKeyReq,
                                           int *outMaxKeyReq);
bool Motion_InterpolateRotation(float time, int interpFuncNum,
                                Quaternion &outQuatRotation);
bool Motion_SetKeyAngles(int keyNum, Quaternion &quatAngles);

#endif  // KEYFRAME_H