"Thanks Hannes.
You're right it did work your way. I did it a very similar way where i reduced the length of the arc so that they didn't interset at the bottom - effectively the same as solid differencing the cylinder.
I can only conclude…"
generative modeling for Rhino
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Too many Breps with Solid Difference
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I have been builidng a definition for a few days now and have come across a problem.When i solid difference between two sets of 17 breps i end up with 289 resultant breps.I've tried to flatten, and…Continue
Tags: Flattening, Difference, Solid
Started this discussion. Last reply by A:RK Feb 13.
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Hannes Löschke replied to A:RK's discussion Too many Breps with Solid Difference"1) you are trying to union a set of closed breps with a surface. (extrude doesn't automatically cap the extrusion as in rhino). extrusion and breps weren't on the same branch so no union at all.
1a) Still the union fails with corrected…"
A:RK replied to A:RK's discussion Too many Breps with Solid Difference"Hannes,
Thanks. I've spent the evening going through the definition and i've managed to rebuild it better without any erroneous geometry. I think the above problem is largely to do with a misplaced centre point when scaling curves. I have…"
Hannes Löschke replied to A:RK's discussion Too many Breps with Solid Difference"Just tried some samples above 5. As mentioned above some of the solidDiff start to fail. Like in Rhino this has soemthing to do with tolerance settings and very small intersection areas.
Right at the bottom of the arcs you can see an area wher all…"
A:RK replied to A:RK's discussion Too many Breps with Solid Difference"Thanks for your help,
I'm not at home so i will have to check it later. Does it work for more than 5? And if not why not?
Thanks K"
Hannes Löschke replied to A:RK's discussion Too many Breps with Solid Difference"Grasshopper evaluates the component for every branch and matches it to the other input.
If you have a rib and want match it up to a list ot cutting geometry, then you need to have the cutting geometry in a (flattened) list. To apply this cutting…"
A:RK replied to A:RK's discussion Too many Breps with Solid Difference"Is there anyone else who might have a minute to look at this issue? or have any suggestions as to what might be causing it?
All Help appreciated!
X Kevin
"
A:RK replied to A:RK's discussion Too many Breps with Solid Difference"yeah i noticed that erronious rib myself. I'll jave a look tomorrow and see where that's coming from. Can't imagine that is causing the multiple brep problem tho.
So how do i flatten the cutting geometry and the geometry to be cut?…"
Hannes Löschke replied to A:RK's discussion Too many Breps with Solid Difference"Yeah right. Didn't really see what you wanted to do. My guess was you wanted to match and intersect.
You will need to flatten the input that creates the notches. So one rib matches up with all your cutting geometry.
Problem is that your…"
A:RK replied to A:RK's discussion Too many Breps with Solid Difference"Hannes,
Thanks for this. I downloaded your attached definition and for some reason it doesn't seem to quite work. I have to flatten the A of the solid difference in order to get the notches in the new set of breps. Once i do that the simplify…"
Hannes Löschke replied to A:RK's discussion Too many Breps with Solid Difference"Path lengths need to match for the sDiff component. Either you flatten and graft or just use simplify to reduce to the minimal path complexity."
A:RK replied to A:RK's discussion Too many Breps with Solid Difference"Here is the simple sphere Rhino File and the Definition.
Thanks in advance."
A:RK posted a discussionToo many Breps with Solid Difference
I have been builidng a definition for a few days now and have come across a problem.When i solid difference between two sets of 17 breps i end up with 289 resultant breps.I've tried to flatten, and use shortest list but nothing seems to make a difference.How do i solid difference between the two sets of breps and produce only 17 resultant breps?I can upload some screen shots or the definition if that helps.Any and all help would be hugely appreciated.Thanks KSee More
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