OpenMesh
OpenMesh/Apps/Unsupported/Streaming/Client/QGLViewerWidget.hh
00001 /*===========================================================================*\
00002  *                                                                           *
00003  *                               OpenMesh                                    *
00004  *      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen      *
00005  *                           www.openmesh.org                                *
00006  *                                                                           *
00007  *---------------------------------------------------------------------------* 
00008  *  This file is part of OpenMesh.                                           *
00009  *                                                                           *
00010  *  OpenMesh is free software: you can redistribute it and/or modify         * 
00011  *  it under the terms of the GNU Lesser General Public License as           *
00012  *  published by the Free Software Foundation, either version 3 of           *
00013  *  the License, or (at your option) any later version with the              *
00014  *  following exceptions:                                                    *
00015  *                                                                           *
00016  *  If other files instantiate templates or use macros                       *
00017  *  or inline functions from this file, or you compile this file and         *
00018  *  link it with other files to produce an executable, this file does        *
00019  *  not by itself cause the resulting executable to be covered by the        *
00020  *  GNU Lesser General Public License. This exception does not however       *
00021  *  invalidate any other reasons why the executable file might be            *
00022  *  covered by the GNU Lesser General Public License.                        *
00023  *                                                                           *
00024  *  OpenMesh is distributed in the hope that it will be useful,              *
00025  *  but WITHOUT ANY WARRANTY; without even the implied warranty of           *
00026  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *
00027  *  GNU Lesser General Public License for more details.                      *
00028  *                                                                           *
00029  *  You should have received a copy of the GNU LesserGeneral Public          *
00030  *  License along with OpenMesh.  If not,                                    *
00031  *  see <http://www.gnu.org/licenses/>.                                      *
00032  *                                                                           *
00033 \*===========================================================================*/ 
00034 
00035 /*===========================================================================*\
00036  *                                                                           *             
00037  *   $Revision: 362 $                                                         *
00038  *   $Date: 2011-01-26 10:21:12 +0100 (Mi, 26 Jan 2011) $                   *
00039  *                                                                           *
00040 \*===========================================================================*/
00041 
00042 
00043 #ifndef OPENMESHAPPS_QGLVIEWERWIDGET_HH
00044 #define OPENMESHAPPS_QGLVIEWERWIDGET_HH
00045 
00046 
00047 //== INCLUDES =================================================================
00048 
00049 
00050 #include <OpenMesh/Core/Geometry/VectorT.hh>
00051 #include <qgl.h>
00052 #include <string>
00053 #include <vector>
00054 
00055 
00056 //== FORWARD DECLARATIONS =====================================================
00057 
00058 
00059 class QPopupMenu;
00060 
00061 
00062 //== CLASS DEFINITION =========================================================
00063 
00064   
00065 class QGLViewerWidget : public QGLWidget
00066 {
00067 
00068   Q_OBJECT
00069   
00070 public:
00071    
00072   // Default constructor.
00073   QGLViewerWidget( QWidget* _parent=0, const char* _name=0 );
00074 
00075   // Destructor.
00076   virtual ~QGLViewerWidget();
00077 
00078   /* Sets the center and size of the whole scene. 
00079      The _center is used as fixpoint for rotations and for adjusting
00080      the camera/viewer (see view_all()). */
00081   void set_scene_pos( const OpenMesh::Vec3f& _center, float _radius );  
00082 
00083   /* view the whole scene: the eye point is moved far enough from the
00084      center so that the whole scene is visible. */
00085   void view_all();
00086 
00088   void add_draw_mode(const std::string& _s);
00089 
00090   float radius() const { return radius_; }
00091   const OpenMesh::Vec3f& center() const { return center_; }
00092 
00093   const GLdouble* modelview_matrix() const  { return modelview_matrix_;  }
00094   const GLdouble* projection_matrix() const { return projection_matrix_; }
00095   void set_modelview_matrix(const GLdouble _modelview_matrix[16])
00096   { memcpy(modelview_matrix_, _modelview_matrix, 16*sizeof(GLdouble)); }
00097   void set_projection_matrix(const GLdouble _projection_matrix[16])
00098   { memcpy(projection_matrix_, _projection_matrix, 16*sizeof(GLdouble)); }
00099 
00100   float fovy() const { return 45.0f; }
00101 
00102 protected:
00103 
00104   // draw the scene: will be called by the painGL() method.
00105   virtual void draw_scene(const std::string& _draw_mode);
00106 
00107   double performance(void);
00108 
00109 private slots:  
00110 
00111   // popup menu clicked
00112   void slotPopupMenu(int _id);  
00113   
00114 private: // inherited
00115 
00116   // initialize OpenGL states (triggered by Qt)
00117   void initializeGL();
00118 
00119   // draw the scene (triggered by Qt)
00120   void paintGL();
00121 
00122   // handle resize events (triggered by Qt)
00123   void resizeGL( int w, int h );
00124 
00125 protected:
00126    
00127   // Qt mouse events
00128   virtual void mousePressEvent( QMouseEvent* );
00129   virtual void mouseReleaseEvent( QMouseEvent* );
00130   virtual void mouseMoveEvent( QMouseEvent* );
00131   virtual void wheelEvent( QWheelEvent* );
00132   virtual void keyPressEvent( QKeyEvent* );
00133 
00134 private:
00135    
00136   // updates projection matrix
00137   void update_projection_matrix();
00138 
00139 protected:
00140   // translate the scene and update modelview matrix
00141   void translate(const OpenMesh::Vec3f& _trans);
00142 
00143   // rotate the scene (around its center) and update modelview matrix
00144   void rotate(const OpenMesh::Vec3f& _axis, float _angle);
00145 
00146   OpenMesh::Vec3f  center_;
00147   float            radius_;
00148               
00149   GLdouble    projection_matrix_[16],
00150               modelview_matrix_[16];
00151 
00152 
00153   // popup menu for draw mode selection
00154   QPopupMenu*               popup_menu_;
00155   unsigned int              draw_mode_;
00156   unsigned int              n_draw_modes_;
00157   std::vector<std::string>  draw_mode_names_;
00158 
00159 
00160 
00161   // virtual trackball: map 2D screen point to unit sphere
00162   bool map_to_sphere(const QPoint& _point, OpenMesh::Vec3f& _result);
00163 
00164   QPoint           last_point_2D_;
00165   OpenMesh::Vec3f  last_point_3D_;
00166   bool             last_point_ok_;
00167 
00168 };
00169 
00170 
00171 //=============================================================================
00172 #endif // OPENMESHAPPS_QGLVIEWERWIDGET_HH
00173 //=============================================================================
00174