I am looking to develop a web applet that will let users modify a simple curve through control points. The left side of the applet will be a 2D profile curve, while the right side of the screen will enable a live preview of the object. Will also need a way for the user to save their object they created. Preferably being able to output a 3D file format for the created object.
Attached please find a graphical example of what I am looking for.