Praktomat Übung 2 Aufgabe 1

Koerper.java

/**
 * Created by Nils on 13.04.2015.
 */
public abstract class Koerper implements Skalierbar {
    // Bezugspunkt
    public Punkt p;

    public void verschiebe(double dx, double dy, double dz) {
        this.p = new Punkt(p.x + dx, p.y + dy, p.z + dz);
    }

    public abstract void skaliere(double a);

    public abstract boolean enthaelt(Punkt a);

    public abstract double volumen();

    public abstract double oberflaeche();

    public abstract double durchmesser();

    static boolean between(double a, double min, double max) {
        if (a >= min && a <= max) return true;
        return false;
    }
}

Kugel.java

/**
 * Created by Nils on 13.04.2015.
 */
public class Kugel extends Koerper implements Skalierbar {
    // Radius
    private double r;

    // Konstruktor
    public Kugel(Punkt p, double r) {
        this.p = new Punkt(p.x, p.y, p.z);
        this.r = r;
    }

    // Methoden
    public void skaliere(double a) {
        this.r = this.r * a;
    }

    public boolean enthaelt(Punkt a) {
        if (Math.sqrt(Math.pow(this.p.x - a.x,2) + Math.pow(this.p.y - a.y,2) + Math.pow(this.p.z - a.z,2)) <= this.r)
            return true;
        return false;
    }

    public double volumen() {
        return (4.0 / 3.0) * Math.PI * Math.pow(this.r, 3);
    }

    public double oberflaeche() {
        return 4 * Math.PI * Math.pow(this.r, 2);
    }

    public double durchmesser() {
        return 2 * this.r;
    }
}

Punkt.java

/**
 * Created by Nils on 13.04.2015.
 */
public class Punkt {
    protected double x, y, z;

    public Punkt(double x, double y, double z) {
        this.x = x;
        this.y = y;
        this.z = z;
    }
}

Quader.java

/**
 * Created by Nils on 13.04.2015.
 */
public class Quader extends Koerper implements Skalierbar {
    // Breite, Tiefe, Höhe
    private double b, t, h;

    public Quader(Punkt p, double b, double t, double h) {
        this.p = new Punkt(p.x, p.y, p.z);
        this.b = b;
        this.t = t;
        this.h = h;
    }

    // Methoden
    public void skaliere(double a) {
        this.b = this.b * a;
        this.t = this.t * a;
        this.h = this.h * a;
    }

    public boolean enthaelt(Punkt a) {
        if (between(a.x, this.p.x, this.p.x + this.b) && between(a.y, this.p.y, this.p.y + this.t) && between(a.z, this.p.z, this.p.z + this.h))
            return true;
        return false;
    }

    public double volumen() {
        return this.b * this.t * this.h;
    }

    public double oberflaeche() {
        return 2 * this.b * this.t + 2 * this.b * this.h + 2 * this.t * this.h;
    }

    public double durchmesser() {
        return Math.sqrt(Math.pow(this.b, 2) + Math.pow(this.t, 2) + Math.pow(this.h, 2));
    }
}

Skalierbar.java

/**
 * Created by Nils on 13.04.2015.
 */
public interface Skalierbar {
    void skaliere(double a);
}