> This is probably more than you want to know
> but here's the entire scope of the project:
Au contraire. That's exactly what's necessary to formulate relevant
suggestions.
The problem you are seeing is due to fact that ...
> Edit File brings up the control points
> for the IGES curves in IBL format.
.... is a misconception. What you be looking at is the knot vector /
list or "fit" points; an incomplete curve definition. Thus the loss
of tangent direction.
I ~might~ do just as you are ... format pt list, crv thru pts.
I doubt, seriously, I'd worry with tangent direction. The curve
is good for reference only. If you have Scan-Tools look into Scan
Crv creation. I ~believe~ it would be precisely what you want for
Deviation Analysis references while you manipulate your existing ISDX
Style feature curves to match. Alternatively, you could just use
the point set for deviation references but that's not as nifty a deal
if I understand correctly.
If, for some reason, I actually wanted to reconstruct surfaces using
the im****t curves explicitly I believe I'd create the curves without
constraints, look at a curvature graph, apply constraints, look at
curve graph again.
Is this a class project? How "complex" are the surfaces you're
working with? A little more info ~might~ lead to some additional
refinements or alternatives, especially with regard to curve
creation / manipulation, if you want to investigate them.
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