select boundary points of a collection

Replies to This Discussion

Permalink Reply by Ola Jaensson on April 16, 2014 at 3:33am

Depends on how your data is organized.

Well organized: Select first and last object in every list and the whole first and last branch.

Less organized: Mesh -> Triangulation -> Convex hull and the Curve closest point, to catch all the points, not just the corners.

Permalink Reply by redberry on April 16, 2014 at 3:49am

Thank you, the first method worked fine .. I'm try also with some sort of selection based on coordinates.

thank you

Permalink Reply by Ola Jaensson on April 16, 2014 at 3:50am

Permalink Reply by Nader Belal on December 11, 2015 at 3:58pm

Ola Jaensson,

Thank you very much.

Permalink Reply by Danny Boyes on April 16, 2014 at 3:51am

For this particular case I would use [Convex Hull] to generate a boundary curve that touches all of your exterior points and the [Cull Pattern] based on [Curve CP] distance = 0.

For what ever reason I don't seem to be able to upload images at the moment so here it is in text

[Surface]-->(S)[Sdivide]

[SDivide](P)-->(P)<Flatten>[Convex Hull]

[SDivide](P)-->(P)[Curve CP]

[Convex Hull](H)-->(C)[Curve CP]

[Curve CP](D)-->[Boolean]

[SDivide](P)-->(L)[Cull Pattern]

[Boolean]-->(P)<Invert>[Cull Pattern]

EDIT: It took so long to try and upload a picture of the solution that I was surpassed by the others :)

Permalink Reply by redberry on April 16, 2014 at 4:11am

I'm sorry, I make an error, leaving that curve on the picture...it shouldn't be there.

just need to select the contour point of a bunch of point, in order to isolate them from the oder...:)

thank you!