Firstly,I have 8 instances of block 1.
Then I want change 4 instances of block 1 into block 2, while the last 4 instances of block 1 don’t change.
How to achieve this?
In your GH canvas display you are inputing a list of definitions, probably the same definition many times and essentialy just renaming it many times to “Block 2”. This doesnt work especially because it appears you’re not clear on the difference between Block definition and block instance. In orther to keep the flow clean I would describe the steps like this: you want to “split” B1 to B1a and B1b, so based on the Geometry on the Block Definition B1 you should create 2 new block definitions B1a and B1b. Then based on the Transform of the pre existing Block instances of B1 you want to insert new instances of B1a and B1b, and then delete the original instances and definition of B1 to get rid of duplicates Hope this helps
Thanks for you suggestion which really helps.
But I don’t know how to achieve the last step: How to delete the original instances without destroy the whole logic?any hints?