package pi1.blatt4;

/** Blatt 4 Aufgabe 4
 * @author <a href="http://www.informatik.uni-mannheim.de/pi4/people/fuessler">Holger Fuessler</a>>
 * @version $Id$
 */

public class GeoCoordinate {

    /** mean earth radius */
    final static double EARTH_MEAN_RADIUS = 6317000.0;
    /** latitude, breitengrad */
    private Angle lati;  // breite,
    /** longitude, laengengrad */
    private Angle longi; // laenge, 

    /** Constructor */
    public GeoCoordinate(Angle lati, Angle longi) {
	this.lati = lati;
	this.longi = longi;
    }
    
    
    public double getXCoordinate() {
	double phi = (Math.PI / 2.0) - lati.getAsRad();
	double theta = longi.getAsRad();
	return(EARTH_MEAN_RADIUS * Math.cos(theta) * Math.sin(phi));
    }
    
    public double getYCoordinate() {
	double phi = (Math.PI / 2.0) - lati.getAsRad();
	double theta = longi.getAsRad();
	return(EARTH_MEAN_RADIUS * Math.sin(theta) * Math.sin(phi));
    }

    public double getZCoordinate() {
	double phi = (Math.PI / 2.0) - lati.getAsRad();
	return(EARTH_MEAN_RADIUS * Math.cos(phi));
    }

    public String toString() {
	return String.format("[%g,%g] [%d,%d,%d]", lati.getAsGrad(), longi.getAsGrad(),
			     Math.round(getXCoordinate()), Math.round(getYCoordinate()), Math.round(getZCoordinate()));
    }
    
    public static void main(String[] args) {
	for (double lati = -90.0; lati <= 91.0; lati += 30) {
	    System.out.println(">>>> New Latitude (Breite): " + lati);
	    for (double longi = -180; longi <= 181; longi += 30) {
		Angle latiAngle = Angle.createWithGrad(lati);
		Angle longiAngle = Angle.createWithGrad(longi);
		System.out.println((new GeoCoordinate(latiAngle, longiAngle)));
	    }
	}

	Angle latiAngle = Angle.createWithGrad(90);
	Angle longiAngle = Angle.createWithGrad(0);
	System.out.printf("\n\nNorth Pole: %s\n", (new GeoCoordinate(latiAngle, longiAngle)));
	latiAngle = Angle.createWithGrad(-90);
	longiAngle = Angle.createWithGrad(0);
	System.out.printf("South Pole: %s\n", (new GeoCoordinate(latiAngle, longiAngle)));
    }


    public Angle getLati() {
	return lati;
    }
    
    
    public void setLati(Angle lati) {
	this.lati = lati;
    }
    
    
    public Angle getLongi() {
	return longi;
    }
    
    
    public void setLongi(Angle longi) {
	this.longi = longi;
    }
    
}