how to create points in the inside of an arbitrary shape BREP?

Replies to This Discussion

Permalink Reply by Dedackelzucht on October 5, 2012 at 2:50am

Hey I made this file for my lectures. The students like it. Maybe it helps you.

best Regards

DeDackel

Attachments:

• populateBrep_Dedackel.gh, 6 KB
• populatebrep_DeDackel.jpg, 427 KB

Permalink Reply by rainake on October 5, 2012 at 3:28am

thank you very much!

but if the brep is like this or more complex, the “t”value of “Evaluate Curve”component is difficult to control, isn't it?

Permalink Reply by Dedackelzucht on October 5, 2012 at 4:12am

here you go

Attachments:

• PopulateBrepTube_Dedackel.gh, 10 KB
• PopulateBrepTube_Dedackel.3dm, 37 KB

Permalink Reply by rainake on October 5, 2012 at 6:00am

thanks Dedackelzucht!

Permalink Reply by Dedackelzucht on October 5, 2012 at 6:04am

Generally I would prefere (and it is easier to to do) to create a point cloud over all and cull it with the inside compnent. David already described it in his anwser.

Best Regards

DeDackel

Permalink Reply by David Rutten on October 5, 2012 at 4:22am

There is no component for creating N points inside a brep. One way to solve this would be to generate a bunch of points inside the Brep bounding box (using the Populate3D component) and then cull all the points that are outside. You need to make it so that you still end up with a few more points than you were gunning for (this depends entirely on the shape of the brep, very spindly shapes will perform poorly). Ultimately you can remove the points at the end of the list that are too many. This approach will still keep the random points as far away from each other as possible.

I attached a file showing the above methodology. Note: it works better in Rhino5. The Inside/Outside Brep algorithm in Rhino4 sometimes makes mistakes.

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

• VolumetricPopulate.gh, 4 KB

Permalink Reply by rainake on October 5, 2012 at 6:06am

thanks david!

you're using new release 0.9.0015!

is there possible to make a component for the function we talk about?

Permalink Reply by eminsua on February 2, 2017 at 8:11am

Hi David

I know this discussion is really old, but you will probably know the answer to this.

If I have a collection of breps instead of just one, but I want to cull the the ones outside this collection.

Why is this not working and all of them are false?

This is probably really basic but is driving me nuts...

Thank you very much in advance.

Cheers

Eduardo

Attachments:

• Capture.JPG, 142 KB