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mousefilter.h

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// ----------------------------------------------------------------------- //
//
// MODULE  : mousefilter.h
//
// PURPOSE : CMouseFilter - Definition and constants
//
// CREATED : 08/11/01
//
// (c) 2001 LithTech, Inc.  All Rights Reserved
//
// ----------------------------------------------------------------------- //


#ifndef __MOUSE_FILTER_H__
#define __MOUSE_FILTER_H__


// Engine includes
#include <ltbasedefs.h>


#define MIN_INPUTBUFFERSIZE         1           // in frames
#define MAX_INPUTBUFFERSIZE         500         // in frames

#define INITIAL_TARGETINPUTBUFFERTIME   (0.5f)  // in seconds

#define MIN_WEIGHTMOD               (0.0f)
#define MAX_WEIGHTMOD               (1.0f)
#define INITIAL_WEIGHTMOD           (0.65f)


class CMouseFilter
{
  public:
    // Construction / destruction
    CMouseFilter();
    ~CMouseFilter();

    void        PreUpdate();

    // Accessors

    LTVector3f  GetFilteredAxisOffsets()    { return m_vFilteredOffsets; }

    float       GetWeightMod()              { return m_fWeightMod; }
    void        SetWeightMod(float fWM);

    float       GetTargetInputBufferTime()  { return m_fTargetInputBufferTime; }
    void        SetTargetInputBufferTime(float fTime);

    uint16      GetInputBufferSize()        { return m_nInputBufferSize; }

  private:

    // Other functions

    void        CalcFilteredOffsets();

    // Members

    float           m_fWeightMod;
    float           m_fTargetInputBufferTime;   // in seconds
    uint16          m_nInputBufferSize;         // current adjusted size
    LTVector3f      m_vInputBuffer[MAX_INPUTBUFFERSIZE];
    LTVector3f      m_vFilteredOffsets;         // constantly updated

    uint16          m_nBufferOffset;            // offset into buffer
    uint16          m_nSamplesTaken;
};


#endif  // __MOUSE_FILTER_H__

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