6f4bc3942d
Cleanup GraphicsView examples with the help of clang-tidy - modernize-use-nullptr - modernize-use-default-member-init - modernize-use-override.IgnoreDestructors - Some QList -> QVector changes - use nullptr - use normalized includes, remove unused includes - fix style Change-Id: I79347e55bfde52f6ae7749cc7093fbd442044020 Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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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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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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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 <QQuaternion>
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#include <QTime>
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#include <QVector3D>
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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 = QVector3D(0, 1, 0);
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float m_angularVelocity = 0;
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QPointF m_lastPos;
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QTime m_lastTime = QTime::currentTime();
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TrackMode m_mode;
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bool m_paused = false;
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bool m_pressed = false;
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};
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#endif
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