Shift a branch instead of the list within it?

Replies to This Discussion

Permalink Reply by Michael Pryor on July 30, 2011 at 11:05am

Could you not use the tree branch component to call out a branch, then shift the list thats only that branch?

Permalink Reply by Chris Tietjen on July 30, 2011 at 11:26am

Hi Guan,

Like this?

 

Chris

Permalink Reply by Andrew Heumann on July 30, 2011 at 3:51pm

This is what the "Relative item" components are for.

Permalink Reply by Chris Tietjen on July 30, 2011 at 5:42pm

Can you show an example?

 

Chris

Permalink Reply by Stan Carroll on July 31, 2011 at 7:21am

Here is the method I use.

Stan

Attachments:

• branch shift.png, 94 KB
• branch shift.gh, 2 KB

Permalink Reply by Michael Pryor on July 31, 2011 at 8:21am

What would be a specific situation this branch shifting would be used. Ive never run into having to use it? I am always interested in expanding my grasshopper knowledge and have a decent understanding of lists but this still kind of confuses me.

 

Permalink Reply by Michael Pryor on July 31, 2011 at 8:24am

also based on the image, didnt that just shift the branches and not the items within a specific branch or am I missing something?

Permalink Reply by Stan Carroll on July 31, 2011 at 10:13am

Your observation is keen, only the branches shifted, items within the list did not.  

The simple answer to your first question regarding when you might use this is: Data Matching.

The more involved answer might be: As definitions increase in complexity and the interaction between various lists derived by disparate upstream sources come together and are eventually combined for input to downstream components, there is a propensity for lists to naturally evolve into different organizational tree forms thereby creating list item (or branch) mismatching and therefore, an undesired result. The need to manipulate the tree structure of a list of data to prepare it for for interaction with another list with dissimilar tree structure becomes most critical.  In a nut shell, the tree structure can be manipulated to get the right branches as well as list items in both input trees paired up properly and interacting as desired. 

I hope this might wet your appetite to explore data matching.  The more I chase GH the prize, the more I realize that mastery of data matching is paramount.

Stan

Permalink Reply by Michael Pryor on July 31, 2011 at 11:15am

just when you think you understand lists, your perception is shattered. lol, I am still not clear on what is happening in this specific case.

Permalink Reply by Stan Carroll on July 31, 2011 at 12:00pm

Yeh, me too.  I reside in a constant state of shattered perception.  

If you are in the mood for a purely academic challenge that might offer self discovery of data matching importance, try this.  

In GH, create say, a wall, build it out of an array of individual panels layed out in a general grid say 5 x 20 or 100 panels.  The panels do not need to touch. Build into your definition, parametrics to modify several aspects of the panels...size, positioning,  rotation, corner radius, thickness, etc.  Be sure to complicate your parametrics to include modulated variations within each parametric.   Now change the parametrics on only 16 of the panels in the array. Place panels with varied parametrics in a specific pattern within the overall array...say a square arrangement. Now change the 16 special panels to another set of panels but change their arrangement to a rectangle pattern.  Try several different patterns and/or placement of the cutout pattern.

If you choose to accept this mission, you will likely have to encounter the need to match data precisely and grow to find the 'relative components' quite useful for manipulation for both branches and list items.  

Good luck, this message will self destruct in ...........

Permalink Reply by Chris Tietjen on July 31, 2011 at 10:20am

Thanks Stan.  I get it.  I wasn't sure how the offset mask worked.

 

Chris

Permalink Reply by hassan.orion on March 5, 2020 at 2:11am

Hey,  Did anyone find the solution for 'shifting items with a branch' ? 

I ran into the same problem. I have hexagons and I want to create diagonals with rotation.

Would appreciate if someone has found the solution

Thanks