oasiscamerasystem.h

使用stl技术,(还没看,是听说的)

/******************************************************************************
 * This source file is part of Bad Camel Gaming
 * Copyright (C) 2003  Zephie Greyvenstein
 * See Readme.html for acknowledgements
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *****************************************************************************/

/******************************************************************************
 * FILENAME    : oasisCameraSystem.h
 * DESCRIPTION : Camera system
 * AUTHOR      : Zephie Greyvenstein
 *****************************************************************************/

/// Avoid double inclusion
#ifndef __CAMERASYSTEM_H__
#define __CAMERASYSTEM_H__

/// Include common stuff
#include "oasisCommon.h"
/// Include the rest of the needed oasis stuff
#include "oasisSystem.h"
#include "oasisMovable.h"
#include "oasisVector3.h"
#include "oasisSingleton.h"

/// Forwrd declare ogre stuff
namespace Ogre {
  class Camera;
  class SceneNode;
  class Animation;
  class AnimationState;
};

namespace Oasis {
  /// Camera system
  class _oasisExport cameraSystem : public system,
                       public movable,
                       public singleton< cameraSystem > {
  public: 
    /// Constructor
    cameraSystem( );
    /// Destructor
    virtual ~cameraSystem( ); 

    /// Get singleton
    static cameraSystem &get( void );
    /// Get singleton pointer
    static cameraSystem *getPtr( void );

    /// Reset this system
    void reset( void );
    /// Update this system
    void update( real time );  
        
    /// Enable/disable the camera as the sound listener
    void setSoundListener( bool isListener );
    
    /// Set the direction vector
    void setDirection( real x, real y, real z );
    /// Set the direction vector
    void setDirection( const vector3 &newDirection );
  
    /// Look at an object
    void lookAt( const object *target );
    /// Look at a point in space
    void lookAt( real x, real y, real z );
    /// Look at a point in space
    void lookAt( const vector3 &target );

    /// Roll the camera anticlockwise ( Z axis )
    void roll( real degrees );
    /// Yaw the camera anticlockwise ( Y axis )
    void yaw( real degrees );
    /// Pitch the camera anticlockwise ( X axis )
    void pitch( real degrees );

    /// Set the yaw axis to use, if any
    void setFixedYawAxis( bool newState, 
			  const vector3 &axis = vector3::UNITY );    

   private:     
    /// Handle to the camera
    Ogre::Camera *camera;
    /// Handle to the scenenode for the camera
    Ogre::SceneNode *cameraNode;    
    /// Are we updating sound listener
    bool listener;

    /// Listener event for frame started
    bool listenerStarted( real time );
    /// Listener event for frame ended
    bool listenerEnded( real time ); 

    /// Update the sound listener values
    void _updateSoundListener( void );

    /// Update position
    void _updatePosition( void );
    /// Update orientation
    void _updateOrientation( void );

   };
};

#endif