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package com.diozero.api.easing;

/*
 * #%L
 * Organisation: diozero
 * Project:      Device I/O Zero - Core
 * Filename:     Bounce.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 - 2020 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 Bounce {
	public static final String IN = "inBounce";
	public static float easeIn(float t, float b, float c, float d) {
		return c - easeOut(d - t, 0, c, d) + b;
	}

	public static final String OUT = "outBounce";
	public static float easeOut(float t, float b, float c, float d) {
		if ((t /= d) < (1 / 2.75f)) {
			return c * (7.5625f * t * t) + b;
		}
		if (t < (2 / 2.75f)) {
			return c * (7.5625f * (t -= (1.5f / 2.75f)) * t + .75f) + b;
		}
		if (t < (2.5 / 2.75)) {
			return c * (7.5625f * (t -= (2.25f / 2.75f)) * t + .9375f) + b;
		}
		return c * (7.5625f * (t -= (2.625f / 2.75f)) * t + .984375f) + b;
	}

	public static final String IN_OUT = "inOutBounce";
	public static float easeInOut(float t, float b, float c, float d) {
		if (t < d / 2) {
			return easeIn(t * 2, 0, c, d) * .5f + b;
		}
		return easeOut(t * 2 - d, 0, c, d) * .5f + c * .5f + b;
	}

}




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