/*
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.
*/
/*
* AlgoLengthVector.java
*
* Created on 30. August 2001, 21:37
*/
package org.geogebra.common.kernel.algos;
import org.geogebra.common.kernel.Construction;
import org.geogebra.common.kernel.StringTemplate;
import org.geogebra.common.kernel.commands.Commands;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoNumeric;
import org.geogebra.common.kernel.geos.GeoVec3D;
import org.geogebra.common.util.MyMath;
/**
* Length of a vector or point.
*
* @author Markus
*/
public class AlgoLengthVector extends AlgoElement {
private GeoVec3D v; // input
private GeoNumeric num; // output
private double[] coords = new double[2];
public AlgoLengthVector(Construction cons, String label, GeoVec3D v) {
super(cons);
this.v = v;
num = new GeoNumeric(cons);
setInputOutput(); // for AlgoElement
// compute length
compute();
num.setLabel(label);
}
@Override
public Commands getClassName() {
return Commands.Length;
}
// for AlgoElement
@Override
protected void setInputOutput() {
input = new GeoElement[1];
input[0] = v;
super.setOutputLength(1);
super.setOutput(0, num);
setDependencies(); // done by AlgoElement
}
public GeoNumeric getLength() {
return num;
}
GeoVec3D getv() {
return v;
}
// calc length of vector v
@Override
public final void compute() {
v.getInhomCoords(coords);
num.setValue(MyMath.length(coords[0], coords[1]));
}
@Override
final public String toString(StringTemplate tpl) {
// Michael Borcherds 2008-03-30
// simplified to allow better Chinese translation
return getLoc().getPlain("LengthOfA", v.getLabel(tpl));
}
}