ConstantFunction.java

/*
 * @(#)ConstantFunction.java
 *
 * $Date: 2014-03-13 01:15:48 -0700 (Thu, 13 Mar 2014) $
 *
 * Copyright (c) 2012 by Jeremy Wood.
 * All rights reserved.
 *
 * The copyright of this software is owned by Jeremy Wood. 
 * You may not use, copy or modify this software, except in  
 * accordance with the license agreement you entered into with  
 * Jeremy Wood. For details see accompanying license terms.
 * 
 * This software is probably, but not necessarily, discussed here:
 * https://javagraphics.java.net/
 * 
 * That site should also contain the most recent official version
 * of this software.  (See the SVN repository for more details.)
 */
package com.bric.math.function;

public class ConstantFunction implements Function {
	double value;
	
	public ConstantFunction(double v) {
		this.value = v;
	}

	public double evaluate(double x) {
		return value;
	}

	public double[] evaluateInverse(double y) {
		if(y==value) return new double[] { Double.NaN };
		return new double[] {};
	}
}