oasiscamerasystem.cpp

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.cpp
 * DESCRIPTION : Camera system
 * AUTHOR      : Zephie Greyvenstein
 ****************************************************************************/

#include "oasisCameraSystem.h"
#include "oasisGraphicsSystem.h"
#include "oasisConvert.h"
#include "oasisException.h"
#include "oasisObject.h"
#include "oasisConfiguration.h"
#include "oasisSoundSystem.h"

#include "OgreCamera.h"
#include "OgreProfiler.h"
#include "OgreAnimation.h"
#include "OgreAnimationState.h"
#include "OgreSceneManager.h"
#include "OgreAnimationTrack.h"
#include "OgreKeyFrame.h"

namespace Oasis {
  
  template< > cameraSystem *singleton< cameraSystem >::singletonPtr = 0;

  cameraSystem::cameraSystem( ) : system( "Camera" ) {
    // Grab the camera handle
    camera = graphicsSystem::get( ).getCamera( );
    // Default to fixed yaw axis
    setFixedYawAxis( true );
    // We are not a sound listener    
    listener = false;   
  }
  
  cameraSystem::~cameraSystem( ) {   
    // Forget the camera handle
    camera = NULL;  
  }
  
  cameraSystem &cameraSystem::get( void ) {
    return singleton< cameraSystem >::get( );
  }
  
  cameraSystem *cameraSystem::getPtr( void ) {
    return singleton< cameraSystem >::getPtr( );
  }

  void cameraSystem::reset( void ) {
    setPosition( vector3::ZERO ); 
    setDirection( vector3::UNITZ );
  }
  
  void cameraSystem::update( real time ) {
   
  }

  void cameraSystem::setSoundListener( bool isListener ) {
    listener = isListener;
  }

  void cameraSystem::setDirection( real x, real y, real z ) {
    setDirection( vector3( x, y, z ) );
  }

  void cameraSystem::setDirection( const vector3 &newDirection ) {
    camera->setDirection( convert::toOgreVector3( newDirection ) ); 
    orientation = convert::parseQuaternion( camera->getOrientation( ) );   
    _updateSoundListener( );
  }

  void cameraSystem::lookAt( const object *target ) {
    lookAt( target->getPosition( ) );
  }

  void cameraSystem::lookAt( real x, real y, real z ) {
    lookAt( vector3( x, y, z ) );
  }

  void cameraSystem::lookAt( const vector3 &target ) {
    camera->lookAt( convert::toOgreVector3( target ) );
    orientation = convert::parseQuaternion( camera->getOrientation( ) );   
    _updateSoundListener( );
  }

  void cameraSystem::roll( real degrees ) {
    camera->roll( degrees );
    orientation = convert::parseQuaternion( camera->getOrientation( ) );   
    _updateSoundListener( );
  }
  
  void cameraSystem::yaw( real degrees ) {
    camera->yaw( degrees );
    orientation = convert::parseQuaternion( camera->getOrientation( ) );   
    _updateSoundListener( );
  }
  
  void cameraSystem::pitch( real degrees ) {
    camera->pitch( degrees );
    orientation = convert::parseQuaternion( camera->getOrientation( ) );   
    _updateSoundListener( );
  }

  void cameraSystem::setFixedYawAxis( bool newState, const vector3 &axis ) {
    camera->setFixedYawAxis( newState, convert::toOgreVector3( axis ) );
  }

  void cameraSystem::_updateSoundListener( void ) {
    if ( !listener ) {
      return;
    }    

    // Up
    Ogre::Vector3 up = camera->getDerivedOrientation( ) * 
      Ogre::Vector3::UNIT_Y;
      
    soundSystem::get( ).
      setListenerPosition( position,
         convert::parseVector3( camera->getDirection( ) ),
         convert::parseVector3( up ) );  
  }
  
  void cameraSystem::_updatePosition( void ) {    
    camera->setPosition( convert::toOgreVector3( position ) );
    _updateSoundListener( );
  }
  
  void cameraSystem::_updateOrientation( void ) {  
    camera->setOrientation( convert::toOgreQuaternion( orientation ) );
    _updateSoundListener( );
  }

}