this.v[0] = x; this.v[1] = y; this.v[2] = z; this.v[3] = isPoint ? 1 : 0;
this.v[0] = 0; this.v[1] = 0; this.v[2] = 0; this.v[3] = 1;
	public Vector( double x, double y, double z, boolean isPoint )	{		this.v[0] = x;		this.v[1] = y;		this.v[2] = z;		this.v[3] = isPoint ? 1 : 0;	}