ExtrudeFace?

Hi all,

I'm trying to simulate the ExtrudeFace command. I have a closed Brep > Explode component. Could someone help me understand how to cull the F(aces) output to grab the faces I need?

tia,

Replies to This Discussion

Permalink Reply by David Rutten on April 2, 2011 at 11:27pm

Hi Declan,

what is the criteria for the faces you need?

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Declan Halpin on April 3, 2011 at 8:06am

Hi David,

The Explode component outputs a list of trimmed srfs. I just need to somehow grab the relevant 5 srfs and ignore the rest. This is probably VERY rudimentary stuff; I know I've seen some list-sorting info in early tut's but I can't remember where....

Thanks for such a splendid tool!

Permalink Reply by Chris Tietjen on April 3, 2011 at 3:10pm

Chris

Permalink Reply by Vicente Soler on April 3, 2011 at 7:59pm

Beware, you're connecting an output that returns a point in 3d space to an input that expects a surface uv coordinate.

Permalink Reply by Chris Tietjen on April 4, 2011 at 7:11am

I was aware of that but was just trying to get something quick to display the concept.

Thanks.

Chris

Permalink Reply by Vicente Soler on April 4, 2011 at 8:01am

It might confuse new users.

Permalink Reply by Danny Boyes on April 4, 2011 at 9:36am

I have to agree with Vicente on this plugging in the 3D centroid into the UV 2D input does not equate to the same thing. Have a look at where the actual evaluation planes area on your faces. As they are planar it doesn't matter in this case because everywhere has the same normal direction, but if you were looking for the center of a curved surface it might offer some funny results. I changed the example below to reflect this.

Permalink Reply by Chris Tietjen on April 4, 2011 at 9:52am

Point taken.

Thanks.

Chris

Permalink Reply by Vicente Soler on April 3, 2011 at 8:02pm

How do you define what 5 surfaces are relevant?

Permalink Reply by Danny Boyes on April 4, 2011 at 9:32am

Usually a good way to select surfaces based on Already known criteria such as height is Sort and SubList. By using the synchronous sort inputs available through the input manager on the context menu you can reduce a list to only include a subset of the Faces.

In the example below the height of the face's centroid has been used to find everything above base. i.e. not the smallest

EDITED VERSION. To reflect Vicente's comments above.

Permalink Reply by Declan Halpin on April 4, 2011 at 9:47am

Hi all, thanks for all the comments.

I basically want to simulate the OffsetPolysrf command in Rh5.0. I have figured out how to use ListItem component, and then Offset, but they remain seperate. I don't see any BlenSrf type of command, so is there anyway to join the srfs and offsetPolysrf?

Thanks again!

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