/*
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.CircularDefinitionException;
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.kernelND.GeoPointND;
import org.geogebra.common.kernel.kernelND.GeoVectorND;
/**
*
* @author Markus
*/
public abstract class AlgoUnitVector extends AlgoElement {
protected GeoElement inputGeo; // input
protected GeoVectorND u; // output
protected boolean normalize;
protected double length;
/** Creates new AlgoOrthoVectorVector */
public AlgoUnitVector(Construction cons, GeoElement inputGeo,
boolean normalize) {
super(cons);
this.normalize = normalize;
this.inputGeo = inputGeo;
u = createVector(cons);
GeoPointND possStartPoint = getInputStartPoint();
if (possStartPoint != null && possStartPoint.isLabelSet()) {
try {
u.setStartPoint(possStartPoint);
} catch (CircularDefinitionException e) {
}
}
setInputOutput(); // for AlgoElement
compute();
}
public AlgoUnitVector(Construction cons, String label, GeoElement inputGeo,
boolean normalize) {
this(cons, inputGeo, normalize);
u.setLabel(label);
}
/**
*
* @param cons
* construction
* @return new vector
*/
abstract protected GeoVectorND createVector(Construction cons);
abstract protected GeoPointND getInputStartPoint();
// for AlgoElement
@Override
protected void setInputOutput() {
input = new GeoElement[1];
input[0] = inputGeo;
super.setOutputLength(1);
super.setOutput(0, (GeoElement) u);
setDependencies(); // done by AlgoElement
}
@Override
public Commands getClassName() {
return normalize ? Commands.UnitVector : Commands.Direction;
}
public GeoVectorND getVector() {
return u;
}
@Override
final public String toString(StringTemplate tpl) {
if (!normalize) {
return getLoc().getPlain("DirectionOfA", inputGeo.getLabel(tpl));
}
return getLoc().getPlain("UnitVectorOfA", inputGeo.getLabel(tpl));
}
}