Data Tree - Select several Groups of Points to draw Polylines/Curves

Hi everybody,

first of all i have to say that i´m working with grasshopper just since the last weeks and it makes really fun. I also have to thank all people for all the great *.ghx Files around to explore Grasshopper, it´s really a great help.

I´m working on a architectural Project and want to built some glasdomes. I did already a loftet surface out of nurbscurves (this as a simplification of catenary lines).

Now i stuck in the real handling of the DataTree. I understood the need and meaning of them and also the way the path´s work. But now i´d like to generate new geometry out of the points of my DataTree.

As you can see in the file there are three types uf polyline/curves i want to draw. How could i now draw all these lines in one step. Meaning like i would bake the three polylines, the shift the whole data tree, bake again,...

in the end the structure of the whole dome sould look like this:

i´m very thankfull for every tip, thanks a lot

greets Marc

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Permalink Reply by Victor Leung on April 6, 2010 at 12:07am

Hi there,

I've written something for you, you may what to take a look how the path mapper works, sometimes it helps a lot. The shift operation is pretty tricky there, because currently in what I wrote, I have fed 11 branches into the shift, then feed 11 numbers (0,1,2,3....10) to it, so the elements in each branch has a different shift.

the path mapper usually handles most problems about tree structure.

cheers

Attachments:

catenarydome_victor.ghx, 476 KB
CatenaryDome_victor.3dm, 180 KB

Permalink Reply by Marc Pancera on April 12, 2010 at 10:50am

Hi Victor,

thanks a lot for your Help. I didn´t know how to use the Path Mapper, but it´s a really handy tool
. Till now i did some Solutions with Lists (List Item / Shift List, etc) which worked in the end, but ecame quite complicated. I´ll update my Dome as soon as a have the time with the PathMapper. I need to design also the Rest of the Building ;-) ... As soon as i have another nice Step ißll post it...

Thanks again, cheers
Marc

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