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_INTERFACE_IEASING_CURVE_H 16 #define META_INTERFACE_IEASING_CURVE_H 17 18 #include <meta/base/namespace.h> 19 #include <meta/interface/curves/intf_curve_1d.h> 20 21 META_BEGIN_NAMESPACE() 22 23 META_REGISTER_INTERFACE(IEasingCurve, "a27e0158-28c6-4e72-8ea2-a43301736653") 24 25 /** 26 * @brief IEasingCurve is the interface for all 1D easing curves, which 27 * require the transform input to be between [0,1]. 28 */ 29 class IEasingCurve : public ICurve1D { 30 META_INTERFACE(ICurve1D, IEasingCurve) 31 public: 32 /** 33 * @brief The transformation function for this curve. 34 * @param t The point along the curve where the transformation should happen. 35 * For easing curves, t should always be between [0,1]. 36 * @return Transformed value. For t=0 the function should return 0, and for t=1 37 * it should return 1. 38 */ 39 float Transform(float t) const override = 0; 40 }; 41 42 META_END_NAMESPACE() 43 44 #endif // API_UI_EASING_CURVE_H 45