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39
40#ifndef BEZIEREVALUATOR_P_H
41#define BEZIEREVALUATOR_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtCore/qglobal.h>
55
56QT_BEGIN_NAMESPACE
57
58namespace Qt3DAnimation {
59namespace Animation {
60
61struct Keyframe;
62
63class Q_AUTOTEST_EXPORT BezierEvaluator
64{
65public:
66 explicit BezierEvaluator(float time0, const Keyframe &keyframe0,
67 float time1, const Keyframe &keyframe1)
68 : m_time0(time0)
69 , m_time1(time1)
70 , m_keyframe0(keyframe0)
71 , m_keyframe1(keyframe1)
72 {
73 }
74
75 float valueForTime(float time) const;
76 float parameterForTime(float time) const;
77
78 static int findCubicRoots(const float coefficients[], float roots[3]);
79
80private:
81 float m_time0;
82 float m_time1;
83 const Keyframe &m_keyframe0;
84 const Keyframe &m_keyframe1;
85};
86
87} // namespace Animation
88} // namespace Qt3DAnimation
89
90QT_END_NAMESPACE
91
92#endif // BEZIEREVALUATOR_P_H
93

source code of qt3d/src/animation/backend/bezierevaluator_p.h