1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #ifndef META_SRC_CUBIC_BEZIER_EASING_CURVE_H
16 #define META_SRC_CUBIC_BEZIER_EASING_CURVE_H
17
18 #include <meta/base/namespace.h>
19 #include <meta/interface/animation/builtin_animations.h>
20 #include <meta/interface/builtin_objects.h>
21 #include <meta/interface/curves/intf_bezier.h>
22 #include <meta/interface/curves/intf_easing_curve.h>
23
24 #include "../meta_object.h"
25
META_BEGIN_NAMESPACE()26 META_BEGIN_NAMESPACE()
27
28 namespace Curves {
29 namespace Easing {
30
31 class CubicBezierEasingCurve final : public META_NS::Internal::MetaObjectFwd<CubicBezierEasingCurve,
32 ClassId::CubicBezierEasingCurve, IEasingCurve, ICubicBezier> {
33 using Super = META_NS::Internal::MetaObjectFwd<CubicBezierEasingCurve, ClassId::CubicBezierEasingCurve,
34 IEasingCurve, ICubicBezier>;
35 META_IMPLEMENT_INTERFACE_PROPERTY(ICubicBezier, BASE_NS::Math::Vec2, ControlPoint1, BASE_NS::Math::Vec2(0, 0))
36 META_IMPLEMENT_INTERFACE_PROPERTY(ICubicBezier, BASE_NS::Math::Vec2, ControlPoint2, BASE_NS::Math::Vec2(1, 1))
37
38 public:
39 bool Build(const IMetadata::Ptr& meta) override;
40 float Transform(float t) const override;
41
42 private:
43 void UpdateCoefficients();
44 float GetLinearX(float t) const noexcept;
45
46 constexpr float GetX(float t) const noexcept
47 {
48 return ((coeff_[0].x * t + coeff_[1].x) * t + coeff_[2].x) * t;
49 }
50 constexpr float GetY(float t) const noexcept
51 {
52 return ((coeff_[0].y * t + coeff_[1].y) * t + coeff_[2].y) * t;
53 }
54 constexpr float GetDX(float t) const noexcept
55 {
56 return (3.f * coeff_[0].x * t + 2.f * coeff_[1].x) * t + coeff_[2].x;
57 }
58
59 BASE_NS::Math::Vec2 coeff_[3];
60 };
61
62 } // namespace Easing
63 } // namespace Curves
64
65 META_END_NAMESPACE()
66
67 #endif // META_SRC_CUBIC_BEZIER_EASING_CURVE_H
68