// Description:
//   Camera to enable 1st person shooter type mouselook.
//
// Copyright (C) 2001 Frank Becker
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation;  either version 2 of the License,  or (at your option) any  later
// version.
//
// This program is distributed in the hope that it will be useful,  but  WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
//
#ifndef _Camera_hpp_
#define _Camera_hpp_

#include <gl++.hpp>

#include <Trace.hpp>
#include <Direction.hpp>
#include <Singleton.hpp>

class Camera
{
friend class Singleton<Camera>;

public:
    void place( void);
    void billboard( void);
    void mouseLook( float dx, float dy);
    void update( void);
    void move( Direction::DirectionEnum dir, bool isDown);

private:
    ~Camera()
    {
	XTRACE();
    }
    Camera( void):
	_moveCam( false),
	_cameraMove(0.0),
        _cameraX(0.0),
        _cameraY(0.0),
        _cameraZ(0.0),
        _cameraYaw(0.0),
        _cameraPitch(0.0)
    {
	XTRACE();
    }

    Camera( const Camera&);
    Camera &operator=(const Camera&);

    void move( GLfloat stepSize, GLfloat angle);
    void clampCamera( void);

    bool _moveCam;
    GLfloat _cameraMove;
    GLfloat _cameraX;
    GLfloat _cameraY;
    GLfloat _cameraZ;
    GLfloat _cameraYaw;
    GLfloat _cameraPitch;

};

typedef Singleton<Camera> CameraS;

#endif