Creating uneven tree branches from list

Hi,

I have a list of 2310 points, sorted by their 'Z' coordinate which are at every 0.5 interval between 0-10. (Ie I have 'n' number of X,Y,0 coordinates, X,Y,0.5 coordinates, X,Y,1 coordinates and so on)

I want to sort this list into Trees with branches defined by 'Z' coordinate. So that tree {0;0;0} will contain points that satisfy (X,Y,0), tree {0;0;1} to contain points that satisfy (X,Y,0.5) etc.

However these trees will have an unequal number of points in each branch as the number of points for each 'Z' criteria is different. Is there a way to define this in grasshopper?

Thanks,

Tom

Attachments:

Unequal trees.png, 100 KB

Replies to This Discussion

Permalink Reply by Henrik Leander Evers on October 23, 2014 at 8:40am

Hi Tom

In a python component then this would be fairly easy. (I think:))

If you share your definition or at least the points then I could have a fast look for you?

Henrik

Permalink Reply by Tom Jelley on October 23, 2014 at 8:44am

Hi Henrik,

Thanks for the response. I've attached my Grasshopper file. The points which need sorting are grouped and are attached to the sort list component. The rest of the definition is superfluous for now!

Thanks,

Tom

Attachments:

141023_Cylindrical Inversion.gh, 16 KB

Permalink Reply by David Rutten on October 23, 2014 at 8:43am

The number 2 in the expression CInt(P.z*2) is one over z-accuracy.

Attachments:

sortpointsbyz.gh, 7 KB

Permalink Reply by Tom Jelley on October 23, 2014 at 8:55am

Hi David,

Thanks very much for the reply! I can follow the definition for the most part but I'm still a little confused by the Evaluate expression component. I opened up your definition and noticed that in this component your variable is set to 'P: Point or vector' whereas when I create this component it lists 'Variable X: Point or Vector' which is returning an error message on the component.

Tom

Permalink Reply by David Rutten on October 23, 2014 at 9:05am

I renamed it P because it deals with points. If you create a new Expression the default name is x, but I find that confusing in this case because x.z isn't as clear as P.z

Permalink Reply by Tom Jelley on October 23, 2014 at 9:08am

Ah perfect, I follow you now. That's done the job, thank you again for your help!

Permalink Reply by Tom Jelley on October 23, 2014 at 9:18am

Hi David,

[edit] - I'm not sure my original points were in 0.5 'Z' intervals. Your definition is doing exactly what I wanted, I just hadn't sorted my original points correctly.

Thanks,

Tom

Permalink Reply by Henrik Leander Evers on October 23, 2014 at 8:48am

Well David had another solution (probably simpler). I would go for that. :)

Permalink Reply by Tom Jelley on October 23, 2014 at 8:55am

Okay, thanks for looking into it!

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