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package com.diozero.api.easing;
/*
* #%L
* Organisation: mattjlewis
* Project: Device I/O Zero - Core
* Filename: Elastic.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2017 mattjlewis
* %%
* 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 Elastic {
public static final String IN = "inElastic";
public static float easeIn(float t, float b, float c, float d) {
if (t == 0) {
return b;
}
if ((t /= d) == 1) {
return b + c;
}
float p = d * .3f;
float a = c;
float s = p / 4;
return -(a * (float) Math.pow(2, 10 * (t -= 1)) * (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p)) + b;
}
public static float easeIn(float t, float b, float c, float d, float a, float p) {
float s;
if (t == 0) {
return b;
}
if ((t /= d) == 1) {
return b + c;
}
if (a < Math.abs(c)) {
a = c;
s = p / 4;
} else {
s = p / (2 * (float) Math.PI) * (float) Math.asin(c / a);
}
return -(a * (float) Math.pow(2, 10 * (t -= 1)) * (float) Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
}
public static final String OUT = "outElastic";
public static float easeOut(float t, float b, float c, float d) {
if (t == 0) {
return b;
}
if ((t /= d) == 1) {
return b + c;
}
float p = d * .3f;
float a = c;
float s = p / 4;
return (a * (float) Math.pow(2, -10 * t) * (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p) + c + b);
}
public static float easeOut(float t, float b, float c, float d, float a, float p) {
float s;
if (t == 0) {
return b;
}
if ((t /= d) == 1) {
return b + c;
}
if (a < Math.abs(c)) {
a = c;
s = p / 4;
} else {
s = p / (2 * (float) Math.PI) * (float) Math.asin(c / a);
}
return (a * (float) Math.pow(2, -10 * t) * (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p) + c + b);
}
public static final String IN_OUT = "inOutElastic";
public static float easeInOut(float t, float b, float c, float d) {
if (t == 0) {
return b;
}
if ((t /= d / 2) == 2) {
return b + c;
}
float p = d * (.3f * 1.5f);
float a = c;
float s = p / 4;
if (t < 1) {
return -.5f * (a * (float) Math.pow(2, 10 * (t -= 1))
* (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p)) + b;
}
return a * (float) Math.pow(2, -10 * (t -= 1)) * (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p) * .5f
+ c + b;
}
public static float easeInOut(float t, float b, float c, float d, float a, float p) {
float s;
if (t == 0) {
return b;
}
if ((t /= d / 2) == 2) {
return b + c;
}
if (a < Math.abs(c)) {
a = c;
s = p / 4;
} else {
s = p / (2 * (float) Math.PI) * (float) Math.asin(c / a);
}
if (t < 1) {
return -.5f * (a * (float) Math.pow(2, 10 * (t -= 1))
* (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p)) + b;
}
return a * (float) Math.pow(2, -10 * (t -= 1)) * (float) Math.sin((t * d - s) * (2 * (float) Math.PI) / p) * .5f
+ c + b;
}
}
