How i can do operations on Mesh file/STL file

Replies to This Discussion

Permalink Reply by Phanindra on November 22, 2015 at 6:44pm

With your idea (a curve freeform on a mesh in Rhino), made one mesh file/patch so how i can remove edges and do fillet/chamfer operatio ! 

Attachments:

• mesh file patch.stl, 723 KB

Permalink Reply by Nik Willmore on November 23, 2015 at 7:56am

I don't understand exactly *how* you got that far. How did you get Rhino to patch the hole faces?

Please help me learn too, and explain every step, how you got that to work!

I couldn't even get Rhino to split the mesh.

Since Rhino is a poor mesh modeler, and its Smooth command just destroys the mesh, just open your STL in free Autocad MeshMixer, use the Select palette to brush a selection area, then use the menu to Modify > Select All from that, and use Deform > Smooth and tweak the settings. First use the Sculpt palette with a Flatten brush to manually remove the two very thin artifacts.

You really do have to learn MeshMixer or another mesh modeler if you want to fix these sorts of things as a Rhino user.

Attachments:

• MeshMixerTemp.stl, 806 KB

Permalink Reply by Nik Willmore on November 23, 2015 at 7:38am

In Autodesk MeshMixer, there is a vastly superior way to fill the hole, after deleting the edge of the hole. Instead of using the Analyze automatic patching command, once you delete the hole edge, you double click the edge within the Select palette to select the edge triangles, and then use the normal Erase & Fill command, and that gives TANGENCY instead of a dumb flat patch. However, the bottom patch then domes up through the top one, so you have to manually edit it back down, which is rather easy though. Or there is a Bulge option for the Erase & Fill that prevents it in the first place by bulging both patches out into space:

It's not very robust though, often giving bad artifacts after the Boolean and my attempt to then clean it up of stray stuff. I get double surfaces suddenly appearing, lots of crashes after very long delays. This would take quite some tweaking to develop a good workflow, and maybe require a few MeshMixer updates in the future to work better.

Permalink Reply by Phanindra on November 23, 2015 at 6:21pm

Ya Nik, Mesh mixer is ok but i got unnecessary triagle how i can remove.

give your mail id i will send Rhino procedure, actually this is part of my PhD work.

Permalink Reply by Nik Willmore on November 25, 2015 at 6:47pm

nikwillmore@gmail.com

Thanks!

MeshMixer I am not yet an expert at, sorry. Just selecting the main piece by starting a brush selection then expanding it to the full body via submenu, then inverting the selection should select any stray pieces you can then delete via delete key.

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