public class Tuple3f {

    public float x;
    public float y;
    public float z;

    public Tuple3f(float x, float y, float z) {
	this.x = x;
	this.y = y;
	this.z = z;
    }

    public Tuple3f(float t[]) {
	// ArrayIndexOutOfBounds is thrown if t.length < 3
	this.x = t[0];
	this.y = t[1];
	this.z = t[2];
    }

    public Tuple3f(Tuple3f t1) {
	x = t1.x;
	y = t1.y;
	z = t1.z;
    }

    public Tuple3f() {
	x = 0.0f;
	y = 0.0f;
	z = 0.0f;
    }

    public final void set(float x, float y, float z) {
	this.x = x;
	this.y = y;
	this.z = z;
    }

    public final void set(float t[]) {
	// ArrayIndexOutOfBounds is thrown if t.length < 3
	x = t[0];
	y = t[1];
	z = t[2];
    }

    public final void set(Tuple3f t1) {
	x = t1.x;
	y = t1.y;
	z = t1.z;
    }


    public final void get(float t[]) {
	// ArrayIndexOutOfBounds is thrown if t.length < 3
	t[0] = x;
	t[1] = y;
	t[2] = z;
    }

    public final void get(Tuple3f t) {
	t.x = x;
	t.y = y;
	t.z = z;
    }
    public void add(Tuple3f t1) {
	x += t1.x;
	y += t1.y;
	z += t1.z;
    }

    public static Tuple3f add(Tuple3f t1, Tuple3f t2) {
      Tuple3f t = new Tuple3f(t1);
      t.add(t2);
      return t;
    }

    public static Tuple3f sub(Tuple3f t1, Tuple3f t2) {
      Tuple3f t = new Tuple3f(t1);
      t.sub(t2);
      return t;
    }

    public void sub(Tuple3f t1) {
	x -= t1.x;
	y -= t1.y;
	z -= t1.z;
    }

    public final void negate(Tuple3f t1) {
	x = -t1.x;
	y = -t1.y;
	z = -t1.z;
    }

    public final void negate() {
	x = -x;
	y = -y;
	z = -z;
    }
      
    public final void scale(float s) {
	x *= s;
	y *= s;
	z *= s;
    }

    public boolean equals(Tuple3f t1) {
	return t1 != null && x == t1.x && y == t1.y && z == t1.z;
    }

    public String toString() {
	    return "(" + x + ", " + y + ", " + z +")";
    }

    public final void absolute(Tuple3f t) {
	set(t);
	absolute();
    }

     public final void absolute() {
	if (x < 0.0)
	    x = -x;
	if (y < 0.0)
	    y = -y;
	if (z < 0.0)
	    z = -z;
    }

    public void println(String leader) {
       System.out.println(leader + toString());
    }

}