80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef TRACKBALL_H
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#define TRACKBALL_H
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#include <QtGui>
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#include <QtGui/qvector3d.h>
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#include <QtGui/qquaternion.h>
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class TrackBall
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{
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public:
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enum TrackMode
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{
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Plane,
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Sphere,
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};
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TrackBall(TrackMode mode = Sphere);
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TrackBall(float angularVelocity, const QVector3D& axis, TrackMode mode = Sphere);
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// coordinates in [-1,1]x[-1,1]
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void push(const QPointF& p, const QQuaternion &transformation);
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void move(const QPointF& p, const QQuaternion &transformation);
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void release(const QPointF& p, const QQuaternion &transformation);
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void start(); // starts clock
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void stop(); // stops clock
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QQuaternion rotation() const;
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private:
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QQuaternion m_rotation;
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QVector3D m_axis;
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float m_angularVelocity;
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QPointF m_lastPos;
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QTime m_lastTime;
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bool m_paused;
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bool m_pressed;
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TrackMode m_mode;
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};
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#endif
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