Hi, Does anyone succeeded in multi-threading boolean difference for breps? In my case I have a datatree of single breps per each branch, and other tree with solids to substract. I know that for one solid difference opration is impossible to make faster, but for many objects is it? Is it thread …

@Petras_Vestartas Have a look at this link: [image] Multithread Boolean Difference - GHPhython with Trees retained Grasshopper Hi All, I had a recent project that required a lot of Boolean Differences in Grasshopper - all on separate branches on a data tree. The standard…

Is there C# version as well? It seems that it is failing for CSharp. Any ideas why?

The C# version worked fine for me: [image] Threaded BooleanDiff.gh (457.7 KB) But it is important to notice that booleans can only be performed sequentially, which also this component does in that it processes one branch per thread, meaning, all the spheres in the corresponding branch are boolea…

The performance seems somehow very odd: C# parallel loop is slower than normal component. And python works faster. Is it because it does intersection between one and many breps at once? Could someone explain how we can setup Parallel loop in C# for these booleans? [image] However, it is intere…

If you run both components at the same time, utilizing all cores, how can you then know which component is the fastest? They would fight about available processing power and there’s probably no guarantee that the resources are distributed evenly. I’d check them in independent runs. If the difference…

I ran separately. Possibly brep booleans are just slow and nothing can be done. This is the case for 4 boxes and 50 spheres: [image] And this is after appending to one brep all the spheres. The parallel version wont change and non parallel is a bit better. But it is not the good way of doing bo…

Have you tried doing Intersection and cut with the resulting curves and… well, handmade Boolean? // Rolf

Getting intersection curves is quite fast. But then if you use Brep.Split method the speed is again as slow as before. Image below. [image] Mesh difference if obviously faster, but it wont work for more complicated cases when mesh properties are touching vertex-to-vertext, face-to-face, edge-to-…

Yes, I also just tried Boolean (4s / 5breps) and Split (5s / 5breps) [image] // Rolf

I assume then the conclusion is that Boolean Operations is what it is :slight_smile:

Boolean Difference MultiThreading

Rhino Developer

su.lwpac (Su Lwpac) October 16, 2020, 10:55pm 2

@Petras_Vestartas Have a look at this link:

Maybe this will be helpful.

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Boolean Difference MultiThreading

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