/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 * Copyright (C) 2004-2013  HUBzero Foundation, LLC
 *
 */
#ifndef NV_VOLUME_INTERPOLATOR_H
#define NV_VOLUME_INTERPOLATOR_H

#include <vector>

#include "Volume.h"

namespace nv {

class VolumeInterpolator
{
public :
    VolumeInterpolator();

    void addVolume(Volume *vol);

    void clearAll();
    
    void start();

    Volume *update(float fraction);

    void stop();

    void computeKeys(float fraction, int count, float *interp, int *key1, int *key2);

    bool isStarted() const;

    double getInterval() const;

    double getStartTime() const;

    Volume *getVolume();

private:
    Volume *_volume;

    std::vector<Volume*> _volumes;

    double _interval;
    bool _started;
    unsigned int _numBytes;
    unsigned int _dataCount;
    unsigned int _numComponents;
    double _startTime;
};

inline bool VolumeInterpolator::isStarted() const
{
    return _started;
}

inline double VolumeInterpolator::getStartTime() const
{
    return _startTime;
}

inline double VolumeInterpolator::getInterval() const
{
    return _interval;
}

}

#endif