| 1 | // Copyright (C) 2020 Klaralvdalens Datakonsult AB (KDAB). |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | #ifndef QT3DANIMATION_ANIMATION_FUNCTIONRANGEFINDER_P_H |
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| 4 | #define QT3DANIMATION_ANIMATION_FUNCTIONRANGEFINDER_P_H |
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| 5 | |
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| 6 | // |
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| 7 | // W A R N I N G |
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| 8 | // ------------- |
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| 9 | // |
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| 10 | // This file is not part of the Qt API. It exists for the convenience |
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| 11 | // of other Qt classes. This header file may change from version to |
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| 12 | // version without notice, or even be removed. |
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| 13 | // |
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| 14 | // We mean it. |
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| 15 | // |
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| 16 | |
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| 17 | #include <QtCore/qlist.h> |
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| 18 | #include <private/qglobal_p.h> |
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| 19 | |
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| 20 | #include <cmath> |
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| 21 | #include <cstdlib> |
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| 22 | |
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| 23 | QT_BEGIN_NAMESPACE |
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| 24 | |
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| 25 | namespace Qt3DAnimation { |
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| 26 | namespace Animation { |
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| 27 | |
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| 28 | class Q_AUTOTEST_EXPORT FunctionRangeFinder |
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| 29 | { |
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| 30 | public: |
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| 31 | FunctionRangeFinder(QList<float> *x); |
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| 32 | |
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| 33 | inline int findLowerBound(float x) const { return m_correlated ? hunt(x) : locate(x); } |
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| 34 | |
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| 35 | int rangeSize() const { return m_rangeSize; } |
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| 36 | void setRangeSize(int rangeSize) { m_rangeSize = rangeSize; } |
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| 37 | |
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| 38 | bool isAscending() const { return m_ascending; } |
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| 39 | void setAscending(bool ascending) { m_ascending = ascending; } |
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| 40 | |
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| 41 | int correlationThreshold() const { return m_correlationThreshold; } |
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| 42 | void updateAutomaticCorrelationThreshold() |
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| 43 | { |
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| 44 | m_correlationThreshold = std::max(a: 1, b: int(std::pow(x: float(m_x->size()), y: 0.25))); |
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| 45 | } |
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| 46 | |
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| 47 | private: |
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| 48 | int locate(float x) const; |
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| 49 | int hunt(float x) const; |
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| 50 | |
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| 51 | QList<float> *m_x; |
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| 52 | mutable qsizetype m_previousLowerBound; |
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| 53 | mutable bool m_correlated; |
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| 54 | int m_rangeSize; |
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| 55 | int m_correlationThreshold; |
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| 56 | bool m_ascending; |
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| 57 | }; |
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| 58 | |
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| 59 | } // namespace Animation |
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| 60 | } // namespace Qt3DAnimation |
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| 61 | |
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| 62 | QT_END_NAMESPACE |
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| 63 | |
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| 64 | #endif // QT3DANIMATION_ANIMATION_FUNCTIONRANGEFINDER_P_H |
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| 65 | |
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