trackball.hpp

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00001 /*
00002 **    TP 4ETI CPE Lyon
00003 **    Copyright (C) 2012 Damien Rohmer
00004 **
00005 **    This program is free software: you can redistribute it and/or modify
00006 **    it under the terms of the GNU General Public License as published by
00007 **    the Free Software Foundation, either version 3 of the License, or
00008 **    (at your option) any later version.
00009 **
00010 **   This program is distributed in the hope that it will be useful,
00011 **    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 **    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 **    GNU General Public License for more details.
00014 **
00015 **    You should have received a copy of the GNU General Public License
00016 **    along with this program.  If not, see <http://www.gnu.org/licenses/>.
00017 */
00018 
00019 #ifndef         _TRACKBALL_HPP_
00020 # define        _TRACKBALL_HPP_
00021 
00022 
00023 
00024 
00025 #include <quaternion.hpp>
00026 
00027 namespace cpe
00028 {
00029 
00031     class trackball
00032     {
00033     public:
00034 
00035         // ********************************************* //
00036         // ********************************************* //
00037         //  CONSTRUCTORS
00038         // ********************************************* //
00039         // ********************************************* //
00040 
00042         trackball();
00043 
00044 
00045         //*********************************************//
00046         //*********************************************//
00047         // Get quaternion
00048         //*********************************************//
00049         //*********************************************//
00050 
00052         const quaternion& quat() const;
00054         quaternion& quat();
00055 
00057         const quaternion& d_quat() const;
00059         quaternion& d_quat();
00060 
00061         //*********************************************//
00062         //*********************************************//
00063         // Disc radius
00064         //*********************************************//
00065         //*********************************************//
00066 
00068         double& radius();
00070         const double& radius() const;
00071 
00072         //*********************************************//
00073         //*********************************************//
00074         // Manipulation
00075         //*********************************************//
00076         //*********************************************//
00077 
00079         double project_to_disc(const double& x,const double& y) const;
00080 
00082         void set_2d_coords(const double& x0,const double& y0,const double& x1,const double& y1);
00083 
00085         void apply_rotation();
00086 
00088         void no_motion();
00089 
00090 
00091 
00092 
00093 
00094     private:
00095 
00097         quaternion current_q;
00099         quaternion d_q;
00100 
00102         double disc_radius;
00103 
00104     };
00105 
00106 }
00107 
00108 #endif
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