What do you mean with "Control point"? We do already have 'Point' (Draw->Point), which allows you to put and move a point anywhere you want, to attach things to. But that is probably not what you mean.

How about this as a suggestion? Please make it possible to have ViaCAD generate a surface around an imported mesh. While an imported mesh might really break down into a bazillion facets and vertices, a smoothened, averaged, very representative "moulded surface" would eradicate countless wasted minutes or hours mentally devising work arounds. All VCP has to do is interpolate the user steps necessary to create lines and curves and relevand surfaces and cuts or trims to generate a mathematically and visually better version of what a semi- or reasonably-skilled user might do. Imagine a foot, or hand, or sonar bulb or dome of a tanker or a naval vessel, or the front end of a Volkswagen, or semi simple objects.

If VCP could just pretend it is sculpting or casting moulds inside of or around a given shape, but first internally texts up to 5 shapes and suggests 3 iteratively so the user can interact to refine the shape, this would produce smooth objects and reduce a 450 faces object to maybe 24 and obviate all number of stitching, joining, and other manual, tedious steps.

http://www.youtube.com/watch?v=...ure=youtube_gdata_player

A video is worth a thousand words.

VCP and Shark should have similar functionality, to help clean up messy, unrefined imports. But, in order to not devalue the imported work compared to the source, the patch cleanup should have some deviation constraints, maybe with two options: clean up for modeling display/visual purposes, or clean up for downstream app compatibility purposes.

I've built something like that with Punch, it was the centre of a 1950's Lotus car wheel well-known as the "wobbly web" wheel. I created a series of circular profiles, which are functionally the same as that MoI example, and lofted them, which can be done inwards or outwards. The only issue that I had with Punch is that it won't close the circular profiles, using control point splines, with continuity, so it had to be done in halves. Using a web-like network is possible in Punch, sort-of like MoI, but it's painful, and counter-CAD, IMO. Only one spline was needed to be made, the others are scaled copies, which was easy. The last pic is the original wheel that I was modeling.

I meant the continuity of a closed circular spline, not the surface.

Blowlamp, that tutotial is fantastic!

It is inspiring me to make designs of ship propellers and their blades. In 2011, i made some horribly ugly attempts in VCP 7Pro. No fault of VCP. I should have thought of moving control points of a disc, much like you did. But, i did not even thing of that. I went the painfully difficult path of trying to mimic naval architecture cross sections of blade roots, leading edges, trailing edges, hubs, and tips from sweeps and extrudes.

My props will not to on real ships, but i cannot afford professional tools used by real builders and naval architects. And, i do not want to bw in a licensing situation orrestricted situation where i have to charge people extra if i use a non-free model in my files. And, making my own will be good practice.