TimeTrack.h

/***************************************************************************
 *   This file is part of OpenCAL: Open Computer Animation Library         *
 *   I created OpenCAL as my master's thesis Computer Science (multimedia) *
 *   at the tUL university in Diepenbeek, Belgium                          *
 *                                                                         *
 *   Copyright (C) 2003-2004 by Jeroen Dierckx                             *
 *   jeroen.dierckx@student.luc.ac.be                                      *
 *                                                                         *
 ***************************************************************************/

#ifndef OPENCAL_TIMETRACK_H
#define OPENCAL_TIMETRACK_H

// Includes
#include <OpenCAL/global.h>


namespace OpenCAL
{
    // Forward declarations
    class KeyFrameSystem;

    class OPENCAL_API TimeTrack
    {
    protected:
        // Member variables
        KeyFrameSystem *m_keyFrameSystem;
        float m_currentTime, m_length;
        bool m_loop, m_stopped;

    public:
        // Constructors and destructor
        TimeTrack(KeyFrameSystem *keyFrameSystem);
        virtual ~TimeTrack();

        // Get functions
        KeyFrameSystem *getKeyFrameSystem() { return m_keyFrameSystem; }
        float getCurrentTime() const { return m_currentTime; }
        float getLength() const { return m_length; }
        bool isLooping() const { return m_loop; }
        bool isStopped() const { return m_stopped; }

        // Set functions
        void setLoop(bool loop) { m_loop = loop; }

        // Time stepping functions
        void step(float deltaSeconds);
        void rewind();
        void setTime(float time);

        // Other functions
        void pause() { m_stopped = true; }
        void unpause() { m_stopped = false; }

        virtual void apply() = 0;

    protected:
        // Protected functions
        float applySpeed() const;
    };
}

#endif // OPENCAL_TIMETRACK_H

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