93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt3D module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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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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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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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 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 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 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef BEZIEREVALUATOR_P_H
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#define BEZIEREVALUATOR_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of other Qt classes. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include <QtCore/qglobal.h>
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QT_BEGIN_NAMESPACE
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namespace Qt3DAnimation {
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namespace Animation {
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struct Keyframe;
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class Q_AUTOTEST_EXPORT BezierEvaluator
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{
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public:
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explicit BezierEvaluator(float time0, const Keyframe &keyframe0,
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float time1, const Keyframe &keyframe1)
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: m_time0(time0)
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, m_time1(time1)
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, m_keyframe0(keyframe0)
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, m_keyframe1(keyframe1)
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{
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}
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float valueForTime(float time) const;
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float parameterForTime(float time) const;
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static int findCubicRoots(const float coefficients[], float roots[3]);
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private:
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float m_time0;
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float m_time1;
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const Keyframe &m_keyframe0;
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const Keyframe &m_keyframe1;
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};
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} // namespace Animation
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} // namespace Qt3DAnimation
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QT_END_NAMESPACE
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#endif // BEZIEREVALUATOR_P_H
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