Yes, fortunately for me, the 3D lines fairing program has a radio button that allows me to turn off/on the visual curvature assistance. And the benefit is that in 3D all the transformations are carried through all dimensions so all I have to do is change my view and the program updates the curve fairness lines for the view. Two of the nice aspects of this particular program is that I can bump a control point in a planar direction by a set amount so i am not randomly dragging points so i can adjust my hull/object very minutely. This program also has dependencies built into it. therefore if i have a point at 1 ft aft of the FP on CL and i build say a deck house whose points are dependent on the first point i can drag the initial point to say 5 ft aft and the house will adjust automatically and maintain the same relative size.
Also just a question, assuming that you are not doing this by hand with ducks and splines are you using B-Splines or C-Splines for your curves (C-Splines the line goes through the control points, B-spline they only go through the first and last point the line adjust based on the other intermediate points.) Because it is easier to fair B-Splines but harder to get an exact dimension with-out forcing the curves hand to an extent. C-Splines, while they will work tend to have more discontinuities. If your program has the option to change the type of curve I would say look at that as well.
I will have to read the first paragraph a few times to understand it, but ...
I don't know what 'ducks and splines' are, and I do know that I am using B-spline curves, because the icon tells me that is what I am using. But, I don't know what a B-spline curve is, or a C-spline curve. I doubt if the version of the software I am using, TurboCad, has C-spline curves or I probably would have found them. It appears that most of the time the B-spline curve holds my control points, and names them vertices, unless the fit is outrageous, and then it uses my control point(s) as a suggestion. That is one of the ways I know that I have made a mistake.
Unlike our CAD programs at work, my home software only allows me to use two 3D type views, isometric and trimetric. It can be tiresome, but in a way it forces me to think, rather than just see.
You made me realize something just now. The B-spline curve does move if I drag one of the vertices, I think. I think I found that out by accident and at the time it seemed irritating, but on further reflection I am guessing that instead of guessing where I want my new control point relative to one of the existing control points, I can drag a vertex, and if it looks good in all three planes, wah lah. I have my new control point/vertex. Hmmmm.
I have found a way to move, copy, mirror, etc. more that one object/element, but it entails turning off all the other layers, drawing a box around the desired objects with the selection tool. and selecting the reference point(s) per the commands.
What I find fascinating is that in drawing a boat, especially one without certain given dimensions, one can draw to make it look good, faired, without coordinates or dimensions. Since I have no artistic ability, it is gratifying to kinda draw like an artist. Kinda.
Thanks for all the help.