Branching structure???

Hi everyone,

I'm very new to grasshopper and i have to use it for my master's degree project.

Specifically, i have to do a branching structure for an high-rise building with grasshopper. In this structure, starting from the seed, the "tree" splits after a certain height into two branches, that change the direction of growth symmetrically; this splitting process continues until the "tree" reaches the height of the attraction point.

I need to do this structure varying these parameters: the number and the location of seed and attraction points, the number of branch iterations, the angle between each branching pair, and the lenght of the members. Also each branch pair must try to focus its symmetry axis to the attraction point.

How can i vary the angle between the branches so that they converge towards the point of attraction?

Thank you in advance :)

You can see attached all the images

Attachments:

seed and attraction point.PNG, 41 KB
Branching parameters.PNG, 80 KB

Replies to This Discussion

Permalink Reply by Armin Seltz on May 6, 2016 at 3:23am

I think you need to break down the problem a bit more and also have at least a starting point done in grasshopper already. People here on the forum love to help, but you need to show that you have done something already (if you are new to the forum make sure you read this: http://www.grasshopper3d.com/forum/topics/how-to-get-help-when-you-...).

Working with iterations and attractors it at least advanced level grasshopper, so I suggest you need to get to know it a bit more first. There are some nice advanced tutorials also regarding iterations at http://grasshopper.rese-arch.org/. They are not free, but totally worth it.

You will have much more luck with help here, if you break down the problem and ask for one thing at a time. Nobody will just create the whole thing for you unfortunately.

Permalink Reply by Simona on May 7, 2016 at 3:04am

I'm sorry, you're right.

I'm trying to make the branching structure with Rabbit and i got what you can see in the attached images, but i can't reduce the angle between the branches at each iteration. How could i do?

Permalink Reply by Simona on May 8, 2016 at 12:47am

Sorry, I was wrong to explain, i wanted to say that I can't rotate each pair of branches at each iteration in such a way their axis converge towards a point. Ho could I do?
Thanks in advance

Permalink Reply by Nik Willmore on May 7, 2016 at 12:56am

The Shortest Walk component may let you avoid recursive iteration and just rely on proper placement of points, giving you the branching structure for free, as long as your starting point remains a single target point. Then you explode the resulting polylines, and remove duplicate lines (flattening the input of removeDuplicateLines to make it work at all) to get rid of all the individual overlapping polyline shortest walk paths from each point through the network to the original source point.

http://www.grasshopper3d.com/forum/topics/shortest-walk

http://www.grasshopper3d.com/forum/topics/shortest-walk-tapered-bra...

Permalink Reply by Simona on May 7, 2016 at 3:09am

ok, thanks, i'll try in this other way also.

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