def getLogicBox(self,x=None,y=None,z=None):
		pdim=self.getPointDim()
		lbox=self.db.getLogicBox()
		A=[lbox.p1[I] for I in range(pdim)]
		B=[lbox.p2[I] for I in range(pdim)]
		p1,p2=[0]*pdim,[0]*pdim
		for I in range(pdim):
			r=(x,y,z)[I]
			if r is None: r=[A[I],B[I]]
			p1[I] = int( A[I]+r[0]*(B[I]-A[I]) if isinstance(r[0],float) else r[0])
			p2[I] = int( A[I]+r[1]*(B[I]-A[I]) if isinstance(r[1],float) else r[1])
		return (p1,p2)