Adding and Filtering data, based on attributes

Hello everyone,

Is there a way to add attributes to geometry - point/ curves ( like name, location/ area name, land-use type and others) and then filter them on the basis of these assigned attributes, like choosing curves with certain land-use type, or selecting curves from a certain area ( i know this can be done with containment component) but i want to base the selection using attributes

Replies to This Discussion

Permalink Reply by Luis Fraguada on June 12, 2012 at 4:12am

Khizer, There is nothing in the base geometry classes that allows you to add attributes. There is a User Data class that you can use to create data and attach it to an object. This would all need to be scripted somehow. I have not messed around too much with it.

Another idea would be to make a custom class wrapper for geometric types that gives you the functionality to read / write custom data attributes...

Permalink Reply by Khizer Ishtiaq on June 12, 2012 at 4:22am

Thanks Luis, i'll look into that and see if i can make it work...

P.S. i wanted to post this question on the general discussions, accidentally posted it here... is there a way to redirect this to the general discussions?

Permalink Reply by Luis Fraguada on June 12, 2012 at 5:16am

Khizer,

You are probably best off reposting in the general discussion. I do not have the privileges of moving the discussion...

Luis

Permalink Reply by Danny Boyes on June 12, 2012 at 5:46am

I don't think any one can move discussions from groups to forums not even site admins

Permalink Reply by Marc Syp on June 12, 2012 at 10:23am

I've seen David move discussions...

Permalink Reply by Danny Boyes on June 15, 2012 at 10:29am

Only within the "Forum". Groups are a very different entity.

When David moved the content of the FAQs Group to a FAQs Discussion Forum I think he just copied and pasted it, which is why it went from me being the poster to him. If he was able to move it then I would still be the author of those first few topics.

I'm not bitter or anything...

stop going on about...

alright, alright, I'll let it lie!

:))

Permalink Reply by Andrew Heumann on June 27, 2012 at 4:35pm

Without scripting, the general way to accomplish this in grasshopper is simply to maintain parallel data structures. If I have a list of 20 points, I can maintain a list of 20 strings to represent their names, and another to represent their types, etc. etc. This however creates the slightly bulky situation of needing to perform list operations (sorting, culling, etc) on multiple lists at a time, which can be a hassle. However, the general goal (e.g. "selecting curves from a certain area") can certainly be accomplished this way.

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