Hi There!
I have some queries about input and output logic of grasshopper. In the attachment surface split component is giving me trouble, normally I want to split all surfaces by curves on them but never done as I desire. This is giving me the sense that i did not understand the basic logic of GH trees.
In the SC 1, my data tree consist of 8 branches with 3 N each
In the SC 2, my data tree consist of 8 branches with 1 N each
How on earth in the SC 3 data branch come out 8 as expected but N’s are so arbitrary looking.
Can you explain this please?
sample model3.gh (17.1 KB)
sample model.3dm (418.4 KB)
Curves and surfaces don’t match !
Barbarian flattening spotted at the very beginning ! Join Curves doesn’t keep the order because of that.
And to finish, tolerance issue due to the offset curve, extending the curve seems to do the trick.
sample model3.gh (17.3 KB)
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Thank you very much ! . I googled “barbarian Flattening” but find only your comments to another topics. Can you explain me what is Barbarian Flattening for me to not to do same mistake again 
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I should write a book, then, exploring the roots of this phenomenon. The introduction should look something like :
Barbarian Flattening is a sacrificial procedure done in Grasshopper in the name of the God of Lazyness 
More seriously, I often see people flattening inputs or outputs as a definitive solution to avoid data trees, instead of considering more subtle tree manipulations (Trim Tree / Shift Paths) that ensure data keeps some organisation along the definition.
You should never Flatten, unless you really have to.
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Ok, thanks for really sarcastic comment ahah. GH seems to me has lots of DOs and DONTs.
There are lots of ways to accomplish things in Grasshopper, so it’s not just a matter of do or don’t, it’s also a personal preference. Had someone else answered to the thread, you’d probably have got a different answer.
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