var degree = 2
				, knots = [0, 0, 1, 1]
				, pts = [ 	[ [0, 0, 0], 	[10, 0, 10], [20, 0, 10] , [30, 0, 0] ],
							[ [0, 10, 0], 	[10, 10, 10], [20, 10, 10] , [30, 10, 0] ]
						]
							
				, wts = [ 	[ 1, 1, 1, 1],
							[ 1, 1, 1, 1]
						];

			srf1 = new verb.NurbsSurface( degree, knots, degree, knots, pts, wts );