Is there a way to remesh STL files while maintaining connectivity?

[thuynh4]

Hello Rhino community!

I am very new at this so sorry if this is a mundane task or if it’s too tall an order…

I did a mesh boolean split on 3 separate parts with their cumulative hollow. This left a bunch of “slivers” in the leftover mesh that render it unusuable by my FEA software.

Is there a way to either prevent these small tetrahedrals from forming or a way to remesh the pieces while still maintain the connectivity between them?

Thanks a bunch in advance!

rhinohelp.3dm (373.6 KB)

[pascal (Pascal Golay)]

Hello - QuadRemesh in the V7 WIP may be useful here -

Rhino 7 Feature: QuadRemesh

QuadRemesh, a new feature in Rhino 7 WIP for Windows and Mac, lets you create a quad mesh from mesh and NURBS geometry. Quad meshes can be: Converted to SubD objects (which can be converted to NURBS) Used in rendering and animation products Used for CFD and FEA analysis For finding principle curvature of forms [image%20(2)] QuadRemesh found the principal curvature of this face, with the help of the guide curve feature. Next Steps: Download Rhino 7 WIP for [windows8logo] Windows or [fin…

-Pascal

[thuynh4]

Thanks for the help Pascal!

I assume that since this is a new feature, that there isn’t an option yet for matching the meshing vertices between different components?

rhinohelp_quadRemesh.3dm (764.5 KB)

[theoutside (Kyle Houchens)]

if you join the parts before quadremeshing it should return a quad mesh with the flow presented correctly-

[thuynh4]

Thanks Kyle!

Would there then be a way to mark the individual components so I can separate them out after?

[pascal (Pascal Golay)]

SplitDisjointMesh should do it.

-Pascal

[thuynh4]

For some reason, when I do “Join”, QuadReMesh messes up the mesh

but when I do “MeshBooleanUnion” it works with QuadReMesh but it does not allow me to split the mesh into the top, middle and bottom part of the shell with the inner piece. It only lets me split the mesh into the inner and outer piece.

Unless there is a way that I can just divide the meshes again?
rhinohelp_join_meshbooleanunion_quadremesh.3dm (1.5 MB)

[theoutside (Kyle Houchens)]

lets back up a bit…

in the original problem, you had a few issues that kept your part from going to FEA… can we just fix those?