Hello I came across a bug in Rhino.Geometry.Intersect.Intersection.MeshMeshFast(). I am getting the error message Message: Value cannot be null. Parameter name: source I believe that the Intersection.MeshMeshFast() function first calls the new Intersection.MeshMesh() function to set the Polyli…

OK; I noted it. RH-57569 . What version of Rhino WIP are you using? MeshMeshFast in Rhino 7 will not be any faster than MeshMesh() or MeshMeshPrecise. In fact, it will call MeshMeshPrecise() under the hood.

Hello Giulio @piac I’m using 7.0.20077.15225, 03/17/2020. I’m not so concerned by the speed, I’m just trying to find a function that gives me a result. So at the moment my script is trying the different Rhino mesh intersections, my own basic mesh intersection, and turning everything into breps and …

Hi @Ano [image] Ano: 7.0.20077.15225, 03/17/2020 I cannot reproduce this in newer WIPs. Can you please post an example where this shows? Alternatively, can you test this in a newer WIP? Thanks, Giulio – Giulio Piacentino for Robert McNeel & Associates giulio@mcneel.com

Hi @piac , I am encountering the same issue descrived before in WIP 7.0.20098. I am testing if my plug-in Wasp is working in Rhino 7, and I get problems whenever using MeshMeshFast method, with the error: Solution exception:Value cannot be null. Parameter name: source Any progress on what the…

@ar0551 can you send a small sample? I’ll make sure to fix it asap then!

Hi Giulio, if you have Wasp installed, you can see the error whenever loading a Part component (basically it used MeshMeshFast intersection to check if the collider it generates is valid). You can see the problem here: 200413_Wasp_rhino7_bug.gh (17.9 KB) Thanks for looking into this!

Hello Giulio @piac Those two meshes give the error. They do not intersect, one is fully contained in the other. Error-MeshMeshFast-CK200413.3dm (27.4 KB) Best, Chris

@Ano OK; I can reproduce it! Thank you. I’m looking into this.

This should get fixed in this week’s WIP, that is released in a few hours.

Bug Rhino7 Intersection.MeshMeshFast()

Rhino Developer

brian (Brian Gillespie) April 14, 2020, 10:33pm 12

RH-57569 is fixed in the latest WIP

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Bug Rhino7 Intersection.MeshMeshFast()

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