AlgoRandomUniform.java

/* 
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org

This file is part of GeoGebra.

This program is free software; you can redistribute it and/or modify it 
under the terms of the GNU General Public License as published by 
the Free Software Foundation.

 */

package org.geogebra.common.kernel.statistics;

import org.geogebra.common.kernel.Construction;
import org.geogebra.common.kernel.SetRandomValue;
import org.geogebra.common.kernel.algos.AlgoTwoNumFunction;
import org.geogebra.common.kernel.commands.Commands;
import org.geogebra.common.kernel.geos.GeoNumberValue;

/**
 * Computes RandomNormal[a, b]
 * 
 * @author Michael Borcherds
 */
public class AlgoRandomUniform extends AlgoTwoNumFunction
		implements SetRandomValue {

	public AlgoRandomUniform(Construction cons, String label, GeoNumberValue a,
			GeoNumberValue b) {
		super(cons, label, a, b);

		// output is random number
		cons.addRandomGeo(num);
	}

	@Override
	public Commands getClassName() {
		return Commands.RandomUniform;
	}

	@Override
	public final void compute() {
		if (input[0].isDefined() && input[1].isDefined()) {
			num.setValue(
					a.getDouble() + kernel.getApplication().getRandomNumber()
							* (b.getDouble() - a.getDouble()));
		} else {
			num.setUndefined();
		}

	}

	@Override
	public void setRandomValue(double d) {

		if (d >= a.getDouble() && d <= b.getDouble()) {
			num.setValue(d);
			num.updateRepaint();
		}

	}

}