The abstract class GeometryCurve is the root class of all curve objects. Return the shape for the geometry. Discretizes the curve using a given deflection and returns a list of points Computes the point of parameter u on this curve Computes the tangent of parameter u on this curve Make a ruled surface of this and the given curves Returns the parameter on the curve of the nearest orthogonal projection of the point. Returns the value of the first parameter. Returns the value of the last parameter.