Pb. of interferring edges after shape creation from a mesh

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amarilisppt
Posts: 48
Joined: Mon Apr 08, 2019 8:24 am

Pb. of interferring edges after shape creation from a mesh

Post by amarilisppt »

Dear all,
I try to convert an imported mesh (valid after Freecad analysis) to a shape. After a visual check, a few edges are interfering (see picture attached), that lead to concerns afterwards (extrusion, fusion, etc...)
How to correct that?
I decreased the tolerance of shaping creation (0.1 basically), but this does not remove this error. And ther does not seem to be any geometrical singularity on this area.
Thanks for your help.
Attachments
PbEdges.JPG
PbEdges.JPG (85.67 KiB) Viewed 1378 times
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Roy_043
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Re: Pb. of interferring edges after shape creation from a mesh

Post by Roy_043 »

Remove faulty faces with Mesh_RemoveComponents.
Fill in the holes with Mesh_AddFacet.
amarilisppt
Posts: 48
Joined: Mon Apr 08, 2019 8:24 am

Re: Pb. of interferring edges after shape creation from a mesh

Post by amarilisppt »

Thanks for your proposal.
Unfortnately, these functions are unavailable ("grey") for this object (shape after Draft/Facebinder). Should I concert this shape into mesh back? Or???
Thanks
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Roy_043
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Re: Pb. of interferring edges after shape creation from a mesh

Post by Roy_043 »

The commands can only be used on meshes. So you you need to go back to the mesh.
amarilisppt
Posts: 48
Joined: Mon Apr 08, 2019 8:24 am

Re: Pb. of interferring edges after shape creation from a mesh

Post by amarilisppt »

Thanks. But, I checked the mesh and there is no bug or such described problem on it.
This appears when FC builds the shape, whatever the shaping tolerance (0.1 by default) is put into.
Thanks
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Roy_043
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Re: Pb. of interferring edges after shape creation from a mesh

Post by Roy_043 »

attach the mesh file please.
amarilisppt
Posts: 48
Joined: Mon Apr 08, 2019 8:24 am

Re: Pb. of interferring edges after shape creation from a mesh

Post by amarilisppt »

Here you are. Perhaps did I miss something?
Thanks.
Attachments
MeshSimplifié.FCStd
(50.65 KiB) Downloaded 18 times
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Roy_043
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Re: Pb. of interferring edges after shape creation from a mesh

Post by Roy_043 »

The mesh is very coarse and has an area where there are holes. I have removed the 2 flipped faces in the image and then filled the holes with Mesh_AddFacet. But a solid created from this mesh will obviously also be coarse.
Attachments
bad-mesh.png
bad-mesh.png (25.31 KiB) Viewed 1162 times
MeshSimplifié-2.FCStd
(54.27 KiB) Downloaded 19 times
amarilisppt
Posts: 48
Joined: Mon Apr 08, 2019 8:24 am

Re: Pb. of interferring edges after shape creation from a mesh

Post by amarilisppt »

Thanks for your help and time.
If you read my initial post "how to extrude from a scanned .step file?", you will understand where this mesh comes from: I have a scanned object mesh with many many edges. Thus, I was adviced to simplifiy it in order to identify less edges and extrude them afterwards (what I did carefully!). The software I used for this simplification if Instantmesh from ETH Zurich, as adviced by one FC forum participant, kindly. Although reparation, holes and singularities have been worked, I can imagine this new "simplified" mesh is indeed a bit coarse.
If you ahev another proposal for this operation, now being aware of my final target, thanks again!
Best regards
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Roy_043
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Re: Pb. of interferring edges after shape creation from a mesh

Post by Roy_043 »

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