1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the demonstration applications of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 2.1 or version 3 as published by the Free 20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22 ** following information to ensure the GNU Lesser General Public License 23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25 ** 26 ** As a special exception, The Qt Company gives you certain additional 27 ** rights. These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** GNU General Public License Usage 31 ** Alternatively, this file may be used under the terms of the GNU 32 ** General Public License version 3.0 as published by the Free Software 33 ** Foundation and appearing in the file LICENSE.GPL included in the 34 ** packaging of this file. Please review the following information to 35 ** ensure the GNU General Public License version 3.0 requirements will be 36 ** met: http://www.gnu.org/copyleft/gpl.html. 37 ** 38 ** $QT_END_LICENSE$ 39 ** 40 ****************************************************************************/ 41 42 #ifndef TRACKBALL_H 43 #define TRACKBALL_H 44 45 #include <QtGui> 46 47 #include <QtGui/qvector3d.h> 48 #include <QtGui/qquaternion.h> 49 50 class TrackBall 51 { 52 public: 53 enum TrackMode 54 { 55 Plane, 56 Sphere, 57 }; 58 TrackBall(TrackMode mode = Sphere); 59 TrackBall(float angularVelocity, const QVector3D& axis, TrackMode mode = Sphere); 60 // coordinates in [-1,1]x[-1,1] 61 void push(const QPointF& p, const QQuaternion &transformation); 62 void move(const QPointF& p, const QQuaternion &transformation); 63 void release(const QPointF& p, const QQuaternion &transformation); 64 void start(); // starts clock 65 void stop(); // stops clock 66 QQuaternion rotation() const; 67 private: 68 QQuaternion m_rotation; 69 QVector3D m_axis; 70 float m_angularVelocity; 71 72 QPointF m_lastPos; 73 QTime m_lastTime; 74 bool m_paused; 75 bool m_pressed; 76 TrackMode m_mode; 77 }; 78 79 #endif 80