/*
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.
*/
/*
* AlgoUnitVectorVector.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.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoVector;
import org.geogebra.common.kernel.kernelND.GeoVectorND;
import org.geogebra.common.util.MyMath;
/**
*
* @author Markus
*/
public abstract class AlgoUnitVector2D extends AlgoUnitVector {
protected double x, y;
/** Creates new AlgoOrthoVectorVector */
public AlgoUnitVector2D(Construction cons, GeoElement inputGeo,
boolean normalize) {
super(cons, inputGeo, normalize);
}
@Override
final protected GeoVectorND createVector(Construction cons) {
GeoVector ret = new GeoVector(cons);
ret.z = 0.0d;
return ret;
}
// line through P normal to v
@Override
final public void compute() {
setXY();
length = normalize ? MyMath.length(x, y) : 1;
((GeoVector) u).x = x / length;
((GeoVector) u).y = y / length;
}
/**
*
* set x, y to compute vector
*/
abstract protected void setXY();
}