Defines curves as constraints to be used to deform a surface Allows you to set the order of continuity required for the constraints: G0, G1, and G2, controlled respectively by G0Criterion G1Criterion and G2Criterion. Returns the order of constraint, one of G0, G1 or G2 Returns the G0 criterion at the parametric point U on the curve. This is the greatest distance allowed between the constraint and the target surface at U. Returns the G1 criterion at the parametric point U on the curve. This is the greatest angle allowed between the constraint and the target surface at U. Raises an exception if the curve is not on a surface. Returns the G2 criterion at the parametric point U on the curve. This is the greatest difference in curvature allowed between the constraint and the target surface at U. Raises an exception if the curve is not on a surface. Allows you to set the G0 criterion. This is the law defining the greatest distance allowed between the constraint and the target surface for each point of the constraint. If this criterion is not set, TolDist, the distance tolerance from the constructor, is used. Allows you to set the G1 criterion. This is the law defining the greatest angle allowed between the constraint and the target surface. If this criterion is not set, TolAng, the angular tolerance from the constructor, is used. Raises an exception if the curve is not on a surface Allows you to set the G2 criterion. This is the law defining the greatest difference in curvature allowed between the constraint and the target surface. If this criterion is not set, TolCurv, the curvature tolerance from the constructor, is used. Raises ConstructionError if the point is not on the surface Returns a 3d curve associated the surface resulting of the constraints loads a 2d curve associated the surface resulting of the constraints Returns a 2d curve associated the surface resulting of the constraints loads a 2d curve resulting from the normal projection of the curve on the initial surface Returns the projected curve resulting from the normal projection of the curve on the initial surface The number of points on the curve used as a constraint. The default setting is 10. This parameter affects computation time, which increases by the cube of the number of points. This function returns the first parameter of the curve. The first parameter is the lowest parametric value for the curve, which defines the starting point of the curve. This function returns the last parameter of the curve. The last parameter is the highest parametric value for the curve, which defines the ending point of the curve. This function returns the length of the curve. The length of the curve is a geometric property that indicates how long the curve is in the space.