| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB). |
| ** Contact: http://www.qt-project.org/legal |
| ** |
| ** This file is part of the Qt3D module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL3$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see http://www.qt.io/terms-conditions. For further |
| ** information use the contact form at http://www.qt.io/contact-us. |
| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPLv3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or later as published by the Free |
| ** Software Foundation and appearing in the file LICENSE.GPL included in |
| ** the packaging of this file. Please review the following information to |
| ** ensure the GNU General Public License version 2.0 requirements will be |
| ** met: http://www.gnu.org/licenses/gpl-2.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QT3DANIMATION_ANIMATION_FUNCTIONRANGEFINDER_P_H |
| #define QT3DANIMATION_ANIMATION_FUNCTIONRANGEFINDER_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of other Qt classes. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/qvector.h> |
| |
| #include <cmath> |
| #include <cstdlib> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DAnimation { |
| namespace Animation { |
| |
| class Q_AUTOTEST_EXPORT FunctionRangeFinder |
| { |
| public: |
| FunctionRangeFinder(const QVector<float> &x); |
| |
| inline int findLowerBound(float x) const { return m_correlated ? hunt(x) : locate(x); } |
| |
| int rangeSize() const { return m_rangeSize; } |
| void setRangeSize(int rangeSize) { m_rangeSize = rangeSize; } |
| |
| bool isAscending() const { return m_ascending; } |
| void setAscending(bool ascending) { m_ascending = ascending; } |
| |
| int correlationThreshold() const { return m_correlationThreshold; } |
| void updateAutomaticCorrelationThreshold() |
| { |
| m_correlationThreshold = std::max(1, int(std::pow(float(m_x.size()), 0.25))); |
| } |
| |
| private: |
| int locate(float x) const; |
| int hunt(float x) const; |
| |
| const QVector<float> &m_x; |
| mutable int m_previousLowerBound; |
| mutable bool m_correlated; |
| int m_rangeSize; |
| int m_correlationThreshold; |
| bool m_ascending; |
| }; |
| |
| } // namespace Animation |
| } // namespace Qt3DAnimation |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT3DANIMATION_ANIMATION_FUNCTIONRANGEFINDER_P_H |