Creating a random List with predetermined contrains

Hi to all!

I am making a summer project and i want to make a series of lists and after that chose one after an evaluation processes. But first things first, let me tell you about the list.

The lists will basically be a set of different ellipses:{a1, a2, b1, b2} (with different properties) From that i want to create random Lists of let’s say 15 items (ellipses) Something like that {a1, b2, b1, a1, a2, b1, b1, a2, a1, b1, b2, a1, b2, a1, a1}. But I want to be able to create some constrains. So for example if I have a1 I will be able to have next a2 or b1 but not to b2. I am not sure if this is possible in grasshopper and i was messing around with some logic components but without any luck.

Any help will be greatly appreciated.

Replies to This Discussion

Permalink Reply by Pieter Segeren on July 4, 2011 at 3:54pm

Hi Stamatis, though I,m convinced this is possible I don't quit get how you want your constraints to work. (it's past my bed time, and too many a's and b's for me now ;)

Permalink Reply by Stamatis on July 4, 2011 at 3:58pm

Maybe with numbers it would be easier to understand.

If there is 1 insert to the list 5

If there is a 5 insert to the list 6 or 4

So if i start from 1 one possible list would be: {1, 5, 6}

Permalink Reply by David Rutten on July 4, 2011 at 5:49pm

I got lazy and wrote a script.

David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

lexical_rules.ghx, 36 KB

Permalink Reply by Stamatis on July 5, 2011 at 1:45am

Thanks this seems pretty straight forward but I think I need something more complex after all...I would explain in detail on the attached sketch

Attachments:

Grasshopper question-chain tree.jpg, 93 KB

Permalink Reply by David Rutten on July 5, 2011 at 5:09am

That is quite a bit more complex. We just went from a sequence of states to a geometric problem that might not have an answer. It's not a guarantee that you can always insert another ellipse without intersecting existing shapes but you can always add another "B" to the end of a string.

There's so much looping and 'iffing' involved here that I sincerely doubt you'll be able to do it without scripting.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Stamatis on July 5, 2011 at 6:13am

Can you refer me to a script or .ghx that tries that creates tree like geometries?

Thanks for the help anyway!

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