Sweep 2 surface issues

Rhino
1

In Rhino 7 sweep 2 no longer produces a clean single surface using the inputs I am accustomed to. In Rhino 5 or 6 using 2 rails and a contour curve almost always provided a single surface in the profile I was looking for. In Rhino 7 ( using the same inputs ) I always get a series of surfaces patched together as a polysurface.

Rhino 5.0.

Rhino 5 good sweep
Rhino 5 good sweep1185×843 90.6 KB

Yellow lines are rails, red is contour curves for sweep. This creates a single surface that is exactly what I am looking for.

Rhino 7.0

Rhino 7 bad sweep
Rhino 7 bad sweep1176×849 99.1 KB

Exact same setup as above ( Rhino 5 ) - yellow lines are rails, red is contour curve… but in Rhino 7 this same instruction now creates a polysurface that is made up of 9 surfaces linked together. Can’t figure out how to eliminate this result and force the command to create a single surface as per previous versions.

Any help appreciated.

Thanks.

2

Hello - probably, using the ‘Refit Rails’ setting in V7 will sort it out but please post a file with all of the input objects, if you cannot solve it.

-Pascal

3

Refit Rails setting corrected the issue. Thanks. Curious as to the reasoning behind the change… what would be the functionality of the change in the tool settings from version 5/6 ?

4

Hi Steve- the change was so that simple cases like a rail with tangent arcs and straights could keep that relatively simple structure and not be refit into a complex G2 curve.

-Pascal

5

Thanks.