Rhinocommon equivalent to "_fin" command (SOLVED)

Rhino Developer
1

Dear Community - or Dear Steve @stevebaer
can anybody tell me, if there is a Rhinocommon equivalent to the Rhino _fin command.

i know there is a workarround Rhinocommon Curve.OffsetNormalToSurface Method
https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_Curve_OffsetNormalToSurface.htm
and this can be combined with loft
https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_Brep_CreateFromLoft.htm

thanks for a short hint / yes or no / or a better workarround
all the best - tom

2

Hi @Tom_P,

The Curve.OffsetNormalToSurface function, which you’ve referenced, provides the functionality behind the Fin command.

Is there something else you’re looking for?

– Dale

3

Thanks for the fast reply.

4

Hello Dale, I have a question, automatucally this method create from the Normal direction, but the Fin Comman has another option, the tangent, that flip the direction. but in Curve.OffsetNormalToSurface doesn’t has this. What do you do recommend fix this?

5

There is OffsetTangentToSurface
https://developer.rhino3d.com/api/rhinocommon/rhino.geometry.curve/offsettangenttosurface

My first idea was a Workaround:
Create a first fin normal.
Now a second fin, that uses the first fin as a base.