Matrix/all combinations of Breps?

Hello,

I am trying to generate a list of all possible combination of two trees of breps. I have two lists, and each branch in each list may contain 2-4 breps (which is why I cannot flatten them out):

List A:

{0;0} - contains breps A, B

{0;1} - contains breps C, D, E

{0;2} - contains breps F, G

List B:

{0;0} - contains breps H, I

{1;0} - contains breps J, K, L

and want to create a list all possible combinations:

{0;0}

{0;1}

{0;2}

{1;0}

{1;1}

{1;2}

or thinking in a matrix format:

I feel like this should be very simple but I am having trouble figuring it out! Any help would be appreciated.

Replies to This Discussion

Permalink Reply by Joseph Oster on August 28, 2017 at 3:19pm

...a list of all possible combination of two trees...

Combined in what ways? I would suggest the following small change to your description, since to me, each branch is effectively a list as far as GH components are concerned:

I have two lists trees, and each branch in each list tree may contain 2-4 breps

I've never used the 'CrossRef' component before but maybe this is a good time?

Attachments:

Matrix_2017Aug28a.gh, 17 KB

Permalink Reply by Joseph Oster on August 28, 2017 at 3:35pm

But it's more complex than this, eh? If you want all possible combinations using just one pair from each list (AH or BH or AI or BI), then there are 4 X 9 X 6 = 216 possibilities!?

Permalink Reply by Mariana Ballina on August 28, 2017 at 4:34pm

Thanks Joseph,

I was thinking of something a little more simple (perhaps "all combinations" is worded too extremely). The total possible combinations in my first example would be 6. More clearly illustrated this is what the combination would look like:

I've managed to make the list by duplicating branches within each list and weaving them. It seems to me that there must be a simpler way, though. I did take your suggestion of looking into "CrossRef" but couldn't manage to work my way through it.

I've attached the GH file in case it is helpful for clarity and for others.