How to Match Multiple Branches to Specific Branches?

I have two lists.

List A has points in this order

{0;0},{0;1},{0;2},{1;0},{1;1},{1;2},{2;0},{2;1}

List B has surfaces in this order

{0}{1}{2}

I'm using a closest point on surface component but the problem is that I am inputting 8 points and getting 24 point out because grasshopper is matching every point to every surface. The correct way would be 3 points for surface {0}, 3 points for surface {1}, and 2 points for surface {2}.

Anyway, is there a way to say that every branch with a {0;?} should relate to the {0} surface, the {1;?} branches should match with the {1} surface, etc?

Replies to This Discussion

Permalink Reply by djordje on January 23, 2014 at 5:48am

Hi JS,

Use the "Shift paths" for your points data tree. That will convert your branches {0;0},{0;1},{0;2},{1;0},{1;1},{1;2},{2;0},{2;1} to {0},{1},{2} and will enable you to exactly match them with those of a surfaces.

Permalink Reply by JS on January 24, 2014 at 4:49am

Thanks djordje!

Permalink Reply by lv2311 on August 7, 2014 at 7:29pm

Hi Djordje,

Maybe you can help me out too.

I have two lists, X and Y, and they have as well a similar structure to the ones that JS showed.

X is made of {0;0} (N=1), {0,1}(N=1)...{0,15}(N=1), {1;0}(N=1), {1,1}(N=1)...{1,15}(N=1). While Y is made of {0}(N=6), {1}(N=15).

What I need to do, is to cycle through all the branched items of the X lists with every single item of the corresponding list of Y.

So:

{0,0}(N=1) with 1st item of Y{0},

{0,1}(N=1) with 1st item of Y{0}

...

{0,15}(N=1) with 1st item of Y{0} (and this is the first cycle).

Then (cycle 2)

{0,0}(N=1) with 2nd item of Y{0},

{0,1}(N=1) with 2nd item of Y{0}

...

{0,15}(N=1) with 2nd item of Y{0}

Then do the same thing with the X list {1,0} .. {1,15} with the corresponding Y{1}

As a result I need the following list structure:

{0,0}N=6, {0,1}N=6, {0,2}N=6 ... {0,15}N=6,

{1,0}N=15, {1,1}N=15, {1,2}N=15 ... {0,15}N=15.

If I use the component you suggested "shift path" it will match the items per item-order instead of cycling through all the items of the first sublist...

Hope this makes sense.

Any suggestion?

Permalink Reply by peter fotiadis on August 8, 2014 at 12:49am

Er...I would suggest posting some definition to start with

PS: other than doing things via components ... generally speaking you can do anything you want via scripting or (to a lesser extent) via controlled iterations (say via Anemone).

Permalink Reply by Arend on August 8, 2014 at 4:53am