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package com.diozero.animation.easing;
/*-
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: Exponential.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2024 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
public class Exponential {
public static final String IN = "inExpo";
public static float easeIn(float t, float b, float c, float d) {
return (t == 0) ? b : c * (float) Math.pow(2, 10 * (t / d - 1)) + b;
}
public static final String OUT = "outExpo";
public static float easeOut(float t, float b, float c, float d) {
return (t == d) ? b + c : c * (-(float) Math.pow(2, -10 * t / d) + 1) + b;
}
public static final String IN_OUT = "inOutExpo";
public static float easeInOut(float t, float b, float c, float d) {
if (t == 0) {
return b;
}
if (t == d) {
return b + c;
}
if ((t /= d / 2) < 1) {
return c / 2 * (float) Math.pow(2, 10 * (t - 1)) + b;
}
return c / 2 * (-(float) Math.pow(2, -10 * --t) + 2) + b;
}
}