GLTrackball.hh 4.54 KB
Newer Older
Jan Möbius's avatar
Jan Möbius committed
1 2 3
/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
Jan Möbius's avatar
Jan Möbius committed
4
 *      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen      *
Jan Möbius's avatar
Jan Möbius committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
 *                           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           *
 *  the License, or (at your option) any later version with the              *
 *  following exceptions:                                                    *
 *                                                                           *
 *  If other files instantiate templates or use macros                       *
 *  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       *
 *  invalidate any other reasons why the executable file might be            *
 *  covered by the GNU Lesser General Public License.                        *
 *                                                                           *
 *  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.                      *
 *                                                                           *
 *  You should have received a copy of the GNU LesserGeneral Public          *
 *  License along with OpenFlipper. If not,                                  *
 *  see <http://www.gnu.org/licenses/>.                                      *
 *                                                                           *
\*===========================================================================*/

/*===========================================================================*\
 *                                                                           *
Jan Möbius's avatar
Jan Möbius committed
37
 *   $Revision$                                                       *
Jan Möbius's avatar
Jan Möbius committed
38 39 40 41
 *   $Author$                                                      *
 *   $Date$                   *
 *                                                                           *
\*===========================================================================*/
Jan Möbius's avatar
 
Jan Möbius committed
42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112


//=============================================================================
//
//  CLASS GLTrackball
//
//=============================================================================


#ifndef ACG_GLTRACKBALL_HH
#define ACG_GLTRACKBALL_HH


//== INCLUDES =================================================================


#include "GLState.hh"
#include "../Math/VectorT.hh"


//== NAMESPACES ===============================================================


namespace ACG {


//== CLASS DEFINITION =========================================================

	      

class ACGDLLEXPORT GLTrackball
{
public:
   
  GLTrackball(GLState& _state);
  ~GLTrackball() {}

  void set_center(const Vec3f& _center) { center_ = _center; }

  void mouse_press(int button, int x, int y);
  void mouse_move(int x, int y);
  void mouse_release(int button, int x, int y);


private:

  void rotation(int x, int y);
  void translation(int x, int y);
  void zoom(int x, int y);

  bool map_to_sphere(const Vec2i& _point, Vec3f& _result);


  GLState&    glstate_;
  ACG::Vec3f  center_;

  Vec2i       last_point_2D_;
  Vec3f       last_point_3D_;
  bool        last_point_ok_;

  enum { ROTATION, TRANSLATION, ZOOM }  action_;
  bool button_down_[10];
};


//=============================================================================
} // namespace ACG
//=============================================================================
#endif // ACG_GLTRACKBALL_HH defined
//=============================================================================