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/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
 *      Copyright (C) 2001-2009 by Computer Graphics Group, RWTH Aachen      *
 *                           www.openflipper.org                             *
 *                                                                           *
 *---------------------------------------------------------------------------*
 *  This file is part of OpenFlipper.                                        *
 *                                                                           *
 *  OpenFlipper 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 3 of           *
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 *  following exceptions:                                                    *
 *                                                                           *
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 *  or inline functions from this file, or you compile this file and         *
 *  link it with other files to produce an executable, this file does        *
 *  not by itself cause the resulting executable to be covered by the        *
 *  GNU Lesser General Public License. This exception does not however       *
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 *  covered by the GNU Lesser General Public License.                        *
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 *  OpenFlipper 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.                      *
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 *  License along with OpenFlipper. If not,                                  *
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/*===========================================================================*\
 *                                                                           *
 *   $Revision$                                                         *
 *   $Author$                                                      *
 *   $Date$                   *
 *                                                                           *
\*===========================================================================*/
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//=============================================================================
//
//  Standard Functions
//
//=============================================================================

/**
 * \file PluginFunctions.hh
 * This file contains functions which can be used by plugins to access data in the framework.
 */

//
#ifndef PLUGINFUNCTIONS_VIEWCONTROL_HH
#define PLUGINFUNCTIONS_VIEWCONTROL_HH

#include <OpenFlipper/common/Types.hh>

#include <ACG/Scenegraph/SceneGraph.hh>
#include <ACG/GL/GLState.hh>
#include <OpenFlipper/common/ViewerProperties.hh>

/** The Namespace PluginFunctions contains functions for all plugins. These functions should be used to get the
 *  objects to work on or to set modes in the examiner widget. */
namespace PluginFunctions {

const int ALL_VIEWERS   = -2;
const int ACTIVE_VIEWER = -1;

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const int VIEW_FREE   = 0;
const int VIEW_TOP    = 1;
const int VIEW_BOTTOM = 2;
const int VIEW_LEFT   = 3;
const int VIEW_RIGHT  = 4;
const int VIEW_FRONT  = 5;
const int VIEW_BACK   = 6;

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//=======================================
// Get/set status of viewers
    /** @name Viewer Status and properties
    * @{ */
//=======================================

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/** \brief Get the viewer properties
 *  Use this functions to get basic viewer properties such as backgroundcolor or rendering options.
 *
 * @param _id Which viewer should be used? ACTIVE_VIEWER will get the properties of the active Viewer which is the default
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 */
DLLEXPORT
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Viewer::ViewerProperties& viewerProperties(int _id = ACTIVE_VIEWER );
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/** @} */


//=======================================
// View settings
    /** @name View settings
    * @{ */
//=======================================

/** Lock scene rotation via mouse
 *
 * @param _mode allow or disallow rotation
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 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
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 */
DLLEXPORT
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void allowRotation(bool _mode, int _viewer = ACTIVE_VIEWER);

/** is scene rotation locked
 *
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
bool allowRotation(int _viewer = ACTIVE_VIEWER);
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/** \brief Set current GL Context to main context
 */
DLLEXPORT
void setMainGLContext();


/** \brief Set the viewing direction
 * @param _dir direction
 * @param _up up vector
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
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void viewingDirection(const ACG::Vec3d &_dir, const ACG::Vec3d &_up  , int _viewer = ACTIVE_VIEWER);
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/** \brief Set the Scene position
 * @param _center Center of the current scene
 * @param _radius Radius of the scene ( Use scene_radius to get the current radius )
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void setScenePos(const ACG::Vec3d& _center, const double _radius  , int _viewer = ALL_VIEWERS);

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/** \brief Set the trackball Center
*
* The scene is rotated around the trackball center when using the mouse 
*
* @param _center Center of the trackball
* @param _viewer Id of the viewer to use.
*                ALL_VIEWERS    will set all viewers (Default)
*                ACTIVE_VIEWER active viewer
*                0..3 Choose viewer explicitly
*/
void setTrackBallCenter(const ACG::Vec3d& _center, int _viewer );


/** \brief Get the trackball Center
*
* The scene is rotated around the trackball center when using the mouse 
*
* @param _center Center of the trackball
* @param _viewer Id of the viewer to use.
*                ALL_VIEWERS    will set all viewers (Default)
*                ACTIVE_VIEWER active viewer
*                0..3 Choose viewer explicitly
*/
const ACG::Vec3d trackBallCenter(const ACG::Vec3d& _center, int _viewer );

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/** \brief Set the scene position
 *
 * Same as  setScenePos(const ACG::Vec3d& _center, double _radius) but reuses the current radius
 *
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void setScenePos(const ACG::Vec3d& _center  , int _viewer = ALL_VIEWERS);

/** \brief Get the current scene center
 *
 */
DLLEXPORT
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const ACG::Vec3d& sceneCenter( int _viewer = ALL_VIEWERS );
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/** \brief Returns the current scene radius from the active examiner widget
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 *
 * Returns the Radius of the scene
 */
DLLEXPORT
double sceneRadius();

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DLLEXPORT
/** \brief Returns the current scene radius from a given examiner viewer
*
* Returns the Radius of the scene
* @param _viewer Give the viewer which should be asked for its current scene radius
*/
double sceneRadius( int _viewer );

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/** \brief Translate viewer pos by given vector
 *
 * Translates the scene by a given vector. ( This is only a view transformation and does not
 * effect the scene center. To really translate the scene, use setScenePos );
 * @param _vector translation
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void translate( const ACG::Vec3d &_vector  , int _viewer = ALL_VIEWERS);

/** \brief Rotate Scene around axis
 *
 * Rotates the current scene.
 * @param _axis   Rotation axis
 * @param _angle  Rotation Angle
 * @param _center Rotation Center
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void rotate(const ACG::Vec3d&  _axis,
            const double       _angle,
            const ACG::Vec3d&  _center,
            int                _viewer = ALL_VIEWERS);


/** \brief Go to home position
 *
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void viewHome(int _viewer = ALL_VIEWERS);

/** \brief View the whole scene
 *
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void viewAll(int _viewer = ALL_VIEWERS);

/** \brief Get the current viewing Direction
 *
 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
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ACG::Vec3d viewingDirection(int _viewer = ALL_VIEWERS);
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/** \brief Check if the projection is orthographic
 * @param _viewer Id of the viewer to use.
 *                ALL_VIEWERS    will set all viewers (Default)
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
bool isProjectionOrthographic( int _viewer = ACTIVE_VIEWER );

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/** \brief Get the current viewer position
 *
 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
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ACG::Vec3d eyePos(int _viewer = ACTIVE_VIEWER);
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/** \brief Get the current up vector
 *
 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
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ACG::Vec3d upVector(int _viewer = ALL_VIEWERS);
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/** \brief Switch to orthographic Projection
 *
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 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
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 */
DLLEXPORT
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void orthographicProjection( int _viewer = ALL_VIEWERS );
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/** \brief Switch to perspective Projection
 *
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 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
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 */
DLLEXPORT
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void perspectiveProjection( int _viewer = ALL_VIEWERS );
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/** \brief Set the draw Mode of a Viewer.\n
 *
 * The DrawModes are defined at ACG/Scenegraph/DrawModes.hh \n
 * They can be combined.
 *
 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void setDrawMode( const unsigned int _mode , int _viewer = ALL_VIEWERS);

/** \brief Get the current draw Mode of a Viewer
 *
 *
 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
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unsigned int drawMode( int _viewer = ACTIVE_VIEWER );
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/** \brief Set the background color of the examiner widget.
 *
 */
DLLEXPORT
void setBackColor( OpenMesh::Vec4f _color);

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/** \brief Set a fixed View for a viewer
 *
 *
 * @param _mode id for the mode
 * @param _viewer Id of the viewer to use.
 *                ACTIVE_VIEWER active viewer
 *                0..3 Choose viewer explicitly
 */
DLLEXPORT
void setFixedView(int _mode, int _viewer = ACTIVE_VIEWER );


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/** @} */


//=======================================
// Do animations in examiner viewer
    /** @name Animations
    * @{ */
//=======================================

/**  Fly to point and set new viewing direction (animated).
 * @param _position New viewer position ( the new eye point of the viewer )
 * @param _center   The new scene center ( the point we are looking at )
 * @param _time     Animation time in ms
 */
DLLEXPORT
void flyTo (const ACG::Vec3d &_position, const ACG::Vec3d &_center, double _time=1000.0);

/** @} */

}

#endif //PLUGINFUNCTIONS_HH