create porous structure

i want to create openings for these faces,
just for the large triangular faces.

how to do this?

thanks

Attachments:

Tri.3dm, 3.1 MB

Replies to This Discussion

Permalink Reply by Carcassi on January 8, 2013 at 11:19am

you could have a try this.

Attachments:

001.gh, 31 KB
001.jpg, 88 KB

Permalink Reply by RWNB on January 8, 2013 at 1:28pm

cool thank you.

i do not understand why not all large triangular surfaces are activated?

any idea?

and still a question.

is it possible to enhance this definition,

so that i can access to all the different surfaces?

Permalink Reply by Chris Hanley on January 8, 2013 at 2:01pm

a slightly different approach. This sorts the surfaces first. Then you could create openings as was previously suggested.

Attachments:

FacesByArea_CAH.gh, 30 KB

Permalink Reply by Chris Hanley on January 8, 2013 at 2:18pm

EDIT: i don't think that using the area of the surface, in this case, will give you the results you want. Surfaces with the same area doesn't mean that they will always have the same shape.

Perhaps a better approach to isolating the groups of surfaces would be to use the length of the boundary curve of the surface?

Permalink Reply by RWNB on January 9, 2013 at 2:17am

many thanks for the explanation and the variation.

Permalink Reply by Hannes Löschke on January 8, 2013 at 3:52pm

Area will only return values within tolerance limits. The equal component is never a good idea when comparing two floating point numbers. Better to calculate the difference and see if the difference is below a set tolerance value.

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