algorithmic modeling for Rhino

select from list

Hi.
I have a brep. i make a list of its surfaces. I need to pick the second biggest, so i list their areas. Then i sort them, and list the one i wanted.
but what i need is to pick that surface for another operation. So i tried to use a function to compare the areas in the list to the area i want, but get always false boolean.
What i have wrong?
thank you everybody
Javier

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Replies to This Discussion

Permalink Reply by Sameer Kumar on January 19, 2010 at 3:06pm

I have a feeling that this has something to do with the data tree structure matching. Have you looked at the tree structure of the values you are comparing? You can use the parameter viewer. Let us know what you find.

Permalink Reply by javier zaratiegui on January 20, 2010 at 1:08am

right!
one was string and other was double.
i just changed it and work perfectly.
thank you both!

Permalink Reply by taz on January 19, 2010 at 5:15pm

Javier,

It could be a tolerance or rounding type error with the double integer type so that x is never exactly equal y (ever).

Try this expression: x ≈ y

Or use the Similarity component where you can specify a tolerance for comparison values.

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