1 | // Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB). |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #ifndef BEZIEREVALUATOR_P_H |
5 | #define BEZIEREVALUATOR_P_H |
6 | |
7 | // |
8 | // W A R N I N G |
9 | // ------------- |
10 | // |
11 | // This file is not part of the Qt API. It exists for the convenience |
12 | // of other Qt classes. This header file may change from version to |
13 | // version without notice, or even be removed. |
14 | // |
15 | // We mean it. |
16 | // |
17 | |
18 | #include <QtCore/private/qglobal_p.h> |
19 | |
20 | QT_BEGIN_NAMESPACE |
21 | |
22 | namespace Qt3DAnimation { |
23 | namespace Animation { |
24 | |
25 | struct Keyframe; |
26 | |
27 | class Q_AUTOTEST_EXPORT BezierEvaluator |
28 | { |
29 | public: |
30 | explicit BezierEvaluator(float time0, const Keyframe &keyframe0, |
31 | float time1, const Keyframe &keyframe1) |
32 | : m_time0(time0) |
33 | , m_time1(time1) |
34 | , m_keyframe0(keyframe0) |
35 | , m_keyframe1(keyframe1) |
36 | { |
37 | } |
38 | |
39 | float valueForTime(float time) const; |
40 | float parameterForTime(float time) const; |
41 | |
42 | static int findCubicRoots(const float coefficients[], float roots[3]); |
43 | |
44 | private: |
45 | float m_time0; |
46 | float m_time1; |
47 | const Keyframe &m_keyframe0; |
48 | const Keyframe &m_keyframe1; |
49 | }; |
50 | |
51 | } // namespace Animation |
52 | } // namespace Qt3DAnimation |
53 | |
54 | QT_END_NAMESPACE |
55 | |
56 | #endif // BEZIEREVALUATOR_P_H |
57 | |