| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to you under the Apache License, |
| * Version 2.0 (the "License"); you may not use this file except in |
| * compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.pivot.scene.animation; |
| |
| /** |
| * Circular easing operation. |
| */ |
| public class CircularEasing implements Easing { |
| @Override |
| public float easeIn(float time, float begin, float change, float duration) { |
| return -change * ((float)Math.sqrt(1f - (time /= duration) * time) - 1f) + begin; |
| } |
| |
| @Override |
| public float easeOut(float time, float begin, float change, float duration) { |
| return change * (float)Math.sqrt(1f - (time = time / duration - 1f) * time) + begin; |
| } |
| |
| @Override |
| public float easeInOut(float time, float begin, float change, float duration) { |
| if ((time /= duration / 2f) < 1f) { |
| return -change / 2f * ((float)Math.sqrt(1f - time * time) - 1f) + begin; |
| } |
| |
| return change / 2f * ((float)Math.sqrt(1f - (time -= 2f) * time) + 1f) + begin; |
| } |
| } |