source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/WalkThroughRecorder.h @ 3220

#ifndef _WALKTHROUGHRECORDER_H__
#define _WALKTHROUGHRECORDER_H__

#include "common.h"
#include <fstream>
#include "Vector3.h"


namespace CHCDemoEngine
{

class Camera;

struct FrameInfo
{
        FrameInfo(const Vector3 &pos, const Vector3 &dir):
        mPosition(pos), mDirection(dir)
        {}

        FrameInfo() {}


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

        Vector3 mPosition;
        Vector3 mDirection;

        friend std::ostream& operator<< (std::ostream &s, const FrameInfo &A);
        friend std::istream& operator>> (std::istream &s, FrameInfo &A);
};


/// Overload << operator for C++-style output
inline std::ostream& operator<< (std::ostream &s, const FrameInfo &A)
{
        return s << A.mPosition << " " << A.mDirection;
}


/// Overload >> operator for C++-style input
inline std::istream& operator>> (std::istream &s, FrameInfo &A)
{
        return s >> A.mPosition >> A.mDirection;
}


/** Records given walkthrough
*/
class WalkThroughRecorder
{
public:
        /** Writes walkthrough frames to file.
        */
        WalkThroughRecorder(const std::string &filename);

        ~WalkThroughRecorder();

        /** Writes current camera data.
        */
        void WriteFrame(Camera *cam);
        

protected:

        std::ofstream mFile;
};


/** Replays a given walkthrough
*/
class WalkThroughPlayer
{
public:
        /** Writes walkthrough frames to file.
        */
        WalkThroughPlayer(const std::string &filename);
        /** Reads next frame. returns false if end of recorded frames is reached.
        */
        bool ReadNextFrame(Camera *cam);


protected:

        std::vector<FrameInfo> mFrameInfos;

        int mFrame;
};


}

#endif