OMKCameraOgreListener.cpp

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//-------------------------------------------------------------------------
#include "OMKCameraOgreListener.h"
#include "dotSceneInterface.h"
#include "OMKOgreVis.h"
//-------------------------------------------------------------------------
using namespace OMK ;
using namespace OMK::Inp ;
using namespace OMK::Vis ;
using namespace Ogre ;

//-------------------------------------------------------------------------
REGISTER_INPUT_LISTENER_FACTORY( CameraOgreListener, "CameraListener" ) ;
//-------------------------------------------------------------------------
CameraOgreListener::CameraOgreListener( ExtensibleSimulatedObject* sender, const Name& id, 
                                        const ConfigurationParameterDescriptor* node )
: InputListener( sender, id, node ),
  _ogreVis( dynamic_cast< OgreVis* >( sender ) ),
  _translateVector( Ogre::Vector3::ZERO ),
  _moveScale( 1.0f ),
  _rotScale( 0.1f ),
  _rotX( 0.0f ),
  _rotY( 0.0f ),
  _moveSpeed( 10.0f )
{
  OMASSERTM( _ogreVis, "Must be an OgreVis object" ) ;
  _cameraNode = static_cast<SceneNode*>( _ogreVis->touchRoot().getAutoCreatedWindow()->
                                         getViewport( 0 )->getCamera()->getParentNode() ) ;
  OMASSERTM( _cameraNode, "The OgreVis current camera does not have a movable parent node" ) ;
}
//-------------------------------------------------------------------------
CameraOgreListener::~CameraOgreListener()
{
}
//-------------------------------------------------------------------------
bool CameraOgreListener::keyPressed( const OIS::KeyEvent &e )
{
  bool cameraMove = false ;
  switch( e.key )
  {
  case OIS::KC_UP :
    _translateVector.z = -_moveScale;
    cameraMove = true ;
    break ;
  case OIS::KC_DOWN :
    _translateVector.z = _moveScale;
    cameraMove = true ;
    break ;
  case OIS::KC_RIGHT :
    _rotX = -_rotScale ;
    cameraMove = true ;
    break ;
  case OIS::KC_LEFT :
    _rotX = _rotScale ;
    cameraMove = true ;
    break ;
    // increase move speed
  case OIS::KC_ADD :
    _moveSpeed += 10;
    cameraMove = true ;
    break ;
    // decrease move speed
  case OIS::KC_SUBTRACT :
    _moveSpeed -= ( 0 < _moveSpeed - 10 ) ? 10 : 0 ;
    cameraMove = true ;
    break ;
  default :
    ;  
  }
  if( cameraMove )
  {
    moveCamera();
  }
  return true ;
}
//-------------------------------------------------------------------------
bool CameraOgreListener::mouseMoved( const OIS::MouseEvent &e )
{
  if( 0 < e.state.Z.rel )
  {
    _translateVector.z = _moveScale * 8.0f ;
  }
  else if ( e.state.Z.rel < 0 )
  {
    _translateVector.z = -_moveScale * 8.0f ;
  }

  /* Rotation factors, may not be used if the second mouse button is pressed. */
  /* If the second mouse button is pressed, then the mouse movement results in 
     sliding the camera, otherwise we rotate. */
  if( e.state.buttonDown( OIS::MB_Right ) ) 
  {
    _translateVector.x += e.state.X.rel * 0.13f ;
    _translateVector.y -= e.state.Y.rel * 0.13f ;
  }
  else if( e.state.buttonDown( OIS::MB_Left ) ) 
  {
    _rotX = -e.state.X.rel * 0.13f ;
    _rotY = -e.state.Y.rel * 0.13f ;
  }
  moveCamera();
  return true ;
}
//-------------------------------------------------------------------------
void CameraOgreListener::moveCamera()
{
  // Transform the axes of the relative vector by camera's local axes
  Ogre::Vector3 trans = _cameraNode->getOrientation() * _translateVector;
  _cameraNode->setPosition( _cameraNode->getPosition() + trans );
  _cameraNode->yaw( Angle( _rotX ) );
  _cameraNode->pitch( Angle( _rotY ) );
  _rotX = 0;
  _rotY = 0;
  _translateVector = Vector3::ZERO ;
}
//-------------------------------------------------------------------------

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