Hello,

Due to the problems with the surface G1/G2 (reported here http://forum.punchcad.com/showthread.php?t=1263) I have been building from curves. I have been finding some problems, so have again gone back to basics.

On the xy plane I drew 2 splines at tangent leaving a gap so the "join" would then, as the user guide states The results do not show that.

As the example:-
Pic 1: 2 spline tangent curves
Pic 2: The join made
Pic 3/4: Curvature check showing bad curvature

Pic 5: Curve Blend/join made and checked in Rhino

Regards,

- Steve

Hi Paul,



In 2d space the "smooth fill curve" does appear to be better than the join, but go into 3d space and the "smooth fill curve" gives some very strange results, I was leaving those examples/questions until some feedback from the developers on the already opened questions I have.

Hi Paul,

Which attached file? (edit: you added the file as I was posting: I will look later)

Those I attached to the first post are showing the "Join" which should be giving correct curvature.

The "Smooth fill curve",.. I am not yet completely sure what it is doing,.. it looks like some extension to the original lines to an interception point, then a blend is made from the new end points,.. which is not what is expected/wanted.

I have attached 2 pics showing 2 curves (both on different planes,.. but the planes are at 90)

Pic "Rhino" shows a blend in Rhino, which then does give me a number of options (G1/G2 etc) and results expected
Pic "Shark" is the result of a "Smooth fill curve" with no additional option given, and not expected/wanted

I did attempt a "Join" between the curves in Shark,, but there was no good curvature.