this.v[0] = v.v[0]; this.v[1] = v.v[1]; this.v[2] = v.v[2]; this.v[3] = v.v[3];
this.v[0] = 0; this.v[1] = 0; this.v[2] = 0; this.v[3] = 1;
	public Vector( Vector v )	{		this.v[0] = v.v[0];		this.v[1] = v.v[1];		this.v[2] = v.v[2];		this.v[3] = v.v[3];	}