I have a set of closed co-planar curves. One is the “outside” and the reset are “holes” & I know which. I need to make a Brep in order to render them. I have been using Brep.CreatePlanarBreps(crvs, 0.001); However this is too slow for use in our DisplayConduit (where i have hundreds of such sets …

did you see those infos / samples ? [image] Building a Brep in RhinoCommon The famous Brep data structure: Rhino - Brep Data Structure Here are a couple of samples, in C#, to chew on: SampleCsFaceWithHole.cs SampleCsTrimmedPlane.cs

Thanks @Tom_P yeah I’d seen those samples - was hoping to find a mechamism without having to dig into the minutia - that sample takes 600 lines to build a brep :scream: The last post in that thread was handy, this approach does indeed make the hole var outer = (new Circle(Plane.WorldXY, Point3d.Or…

Just for interest this is what I’m testing on - nested gaskets ready for laser cutting. [image] The DisplayConduit takes 600ms to load - 200ms for our containment test routine & 400ms to create the Breps & bounding box. Would love to make it faster :slight_smile:

[image] David Birch Uk: make it faster just guessing: track the transformations of same parts. create a single brep. create a quite rough mesh copy and transform the mesh maybe a hatch is faster then a brep ?

Hi @david.birch.uk , You might trying add each planar curve as a planar face loop. test_planar_loops.py (2.0 KB) – Dale

Thanks @dale [image] Dale Fugier: you might trying add each planar curve as a planar face loop. Yeah that worked nicely - 14000ms to 400ms, [image] David Birch Uk: brep.Loops.AddPlanarFaceLoop(0, BrepLoopType.Inner, new[] { inner }); @Tom_P Good idea i’ll have to see if hatches are f…

Brep Faster Holes? using AddTrimCurve?

Scripting

Tom_P May 2, 2024, 8:45am 2

did you see those infos / samples ?

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Brep Faster Holes? using AddTrimCurve?

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