/* 
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.

 */

/*
 * AlgoAngleVector.java
 *
 * Created on 30. August 2001, 21:37
 */

package org.geogebra.common.kernel.algos;

import org.geogebra.common.euclidian.draw.DrawAngle;
import org.geogebra.common.kernel.Construction;
import org.geogebra.common.kernel.StringTemplate;
import org.geogebra.common.kernel.Matrix.Coords;
import org.geogebra.common.kernel.geos.GeoAngle;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.kernelND.GeoDirectionND;
import org.geogebra.common.kernel.kernelND.GeoPointND;
import org.geogebra.common.kernel.kernelND.GeoVectorND;

public abstract class AlgoAngleVectorsND extends AlgoAngle {

	protected GeoVectorND v, w; // input
	protected GeoAngle angle; // output

	public AlgoAngleVectorsND(Construction cons, String label, GeoVectorND v,
			GeoVectorND w) {

		this(cons, label, v, w, null);
	}

	public AlgoAngleVectorsND(Construction cons, String label, GeoVectorND v,
			GeoVectorND w, GeoDirectionND orientation) {
		super(cons);
		setInput(v, w, orientation);
		angle = newGeoAngle(cons);
		setInputOutput(); // for AlgoElement

		// compute angle
		compute();
		angle.setLabel(label);
	}

	// for AlgoElement
	@Override
	protected void setInputOutput() {
		input = new GeoElement[2];
		input[0] = (GeoElement) v;
		input[1] = (GeoElement) w;

		setOutputLength(1);
		setOutput(0, angle);
		setDependencies(); // done by AlgoElement
	}

	/**
	 * set inputs
	 * 
	 * @param v
	 *            first vector
	 * @param w
	 *            second vector
	 * @param orientation
	 *            orientation
	 */
	protected void setInput(GeoVectorND v, GeoVectorND w,
			GeoDirectionND orientation) {
		this.v = v;
		this.w = w;
	}

	public GeoAngle getAngle() {
		return angle;
	}

	public GeoVectorND getv() {
		return v;
	}

	public GeoVectorND getw() {
		return w;
	}

	@Override
	public String toString(StringTemplate tpl) {
		// Michael Borcherds 2008-03-30
		// simplified to allow better Chinese translation
		return getLoc().getPlain("AngleBetweenAB", v.getLabel(tpl),
				w.getLabel(tpl));

	}

	@Override
	public boolean updateDrawInfo(double[] m, double[] firstVec,
			DrawAngle drawable) {
		GeoPointND vertex = getStartPoint(v);
		if (centerIsNotDrawable(vertex)) {
			return false;
		}

		Coords origin = drawable.getCoordsInView(vertex);
		if (!drawable.inView(origin)) {
			return false;
		}

		Coords direction = drawable.getCoordsInView(v.getCoordsInD3());
		if (!drawable.inView(direction)) {
			return false;
		}

		// origin
		m[0] = origin.get()[0];
		m[1] = origin.get()[1];

		// first vec
		firstVec[0] = direction.getX();
		firstVec[1] = direction.getY();

		return true;

	}

	@Override
	public boolean getCoordsInD3(Coords[] drawCoords) {
		GeoPointND vertex = getStartPoint(v);
		if (centerIsNotDrawable(vertex)) {
			return false;
		}

		drawCoords[0] = vertex.getInhomCoordsInD3();
		drawCoords[1] = v.getCoordsInD3();
		drawCoords[2] = w.getCoordsInD3();

		return true;
	}

}