Boolean Difference set is empty

Hi, why I can´t make intersection difference between panels and joins. When I bake the geometry, it works fine in rhino. I get "Boolean Difference set is empty" in grasshopper.

(shell was made from the offset curves of panels and lofted , joins were made from circles in mid points of edges, then lofted and caped)

Attachments:

empty-small.3dm, 790 KB
empty-small.gh, 4 KB

Replies to This Discussion

Permalink Reply by Hannes Löschke on February 17, 2014 at 1:58am

Short answer: graft A.

Data matching is the key here.

For two lists as inputs, SolidDifference will match up and calculate item per item. That means, panel one will be diff'd with connector one, Panel 2 with connector 2 and so...

For only one item in input A, this will be diff'd with all inputs from B.

If you graft input A each list item will be put into a separate list that is in turn is matched against the complete list in B.

Permalink Reply by Jiří on February 17, 2014 at 3:30am

Hi Hannes, thank you a lot for your respond. I tried this before. Only data from B can be grafted in all cases for making component functional, but i think It does´nt matter (I can switch it from A to B, as needed). I read lot of topics on forum and as I know it definetely works perfectly in older versions of grasshopper. In recent version is that problem, that´s not possible take data A and make difference with all of the data B. The choice which you mentioned works, but it takes data A and every one item make diference with all data from B - so it makes duplicates with holes on different places (see picture, its from example model from post before, you can try it)

I found 3 possible solutions:

1) C# script (made by S.Schiefer )

2) Python script (made by Ionut Anton)

3) get older version of GH

If am I right, it´s a pitty. Thank you , again

regards

Permalink Reply by Hannes Löschke on February 17, 2014 at 6:39am

I'm a little confused here. I am using V 0.9.0069 and actually find both ways (grafted A and ungrafted both) to work.

Will try to update and see if this goes wrong...

edit: works with 0.9.0070 too. Did you create the above result with the Definition and Rhino file, you posted here?

Permalink Reply by Jiří on February 17, 2014 at 7:31am

I work also with 0.9.0069, i thought more months older version. I did similar things before and it was Ok. Yes, I used exactly the same files. In any case, thanks for interest!