Assigning a value to a Surface

Replies to This Discussion

Permalink Reply by David Rutten on October 9, 2017 at 11:13am

Grasshopper doesn't have a concept of meta data, so you cannot 'assign' in that sense. You also cannot combine the surface and the number into some larger data type, not unless you want to program such a type from scratch in code.

Rhino type geometry (surfaces, breps, meshes, curves) can have user data, but GH has no components for assigning or reading Rhino user data.

So what exactly do you require when you say "assign"? It's probably possible to re-order either the surface list or the number list so that they match up together.

Permalink Reply by SXS on October 9, 2017 at 11:29am

Hi David,

Thank you for the quick reply. For me, I wanted to assign values on the surfaces so that if the surface has a certain value that I assigned to, the surface will be colored in a certain way. So what I wanted to create is somewhat like a visualization. An example would be like the image below. 

So, if I assign the number 0.30 to the surface, the surface will have the color blue.

Permalink Reply by Hyungsoo Kim on October 9, 2017 at 4:02pm

Hi.

Check attachment if you want. Just for display purpose, there's no problem including assigning to mesh, but assigning as a material for rendering is a whole different problem.

Attachments:

• AssignColoursToNum_re.gh, 21 KB

Permalink Reply by SXS on October 10, 2017 at 3:07am

Hi Hyunsoo, 

Thank you for your reply and help. For the color assigning in the image above, are the values manually assigned? Or is it directly from the surfaces?

Permalink Reply by Hyungsoo Kim on October 10, 2017 at 3:50am

 

Permalink Reply by SXS on October 10, 2017 at 7:02pm

Dear Hyungsoo,

Thank you very much for your help. If I may ask another question, is it possible to reference these numbers to these geometries in grasshopper? 

I have trouble referencing numbers or values to the geometries.

Permalink Reply by Hyungsoo Kim on October 11, 2017 at 1:05am

It seems, there's no problem of data matching with your two data sets.

It depends what would you like to do to your boxes with these numbers.

You can manipulate those numbers(remapping is one way)to assign unique colours to your boxes or transform them.(move or scale.. whatever..)

That is to say, if your data sets are perfectly matched in terms of "Data Tree", then all you have to do is take good care of them.

Permalink Reply by SXS on October 11, 2017 at 3:08am

Hi Hyungsoo,

Thank you for your reply. I would like to extract the geometry using the values. If the values are smaller than a certain number, the associated geometry will be extracted.

Permalink Reply by Hyungsoo Kim on October 11, 2017 at 3:26am

Quick demo..

Permalink Reply by SXS on October 12, 2017 at 4:59am

Hi Hyungsoo,

Thank you very much for the quick demo.