Hello everyone,
I’m using the extrude mesh option in Griddle to generate a 3D mesh by extruding a surface mesh, and I want to keep the same zoning throughout the depth of the model.
I have two questions:
If I plan to excavate certain zones later, how can I “cut” the extrusion accordingly?
Is it possible to reduce the mesh density in the outer areas of the excavation during extrusion, while maintaining mesh continuity, using a 1:2 zoning ratio between adjacent regions?
Below are some figures of a temporary mesh I’m using for practice.
Thanks in advance !
Hello, Zakaria,
It is a bit hard to understand what exactly you’d like to do with the mesh without seeing an actual Rhino model. I’ll try to respond to the extent of what I get from your description. I assume you use GExtract to create some mesh domain.
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In order to create an excavation layer in a closed domain, you have to create a close-volume subdomain in it, for example, by splitting the domain by two parallel meshes. Here you would have to intersect the meshes with the domain and remesh the intersected meshes. This is needed to provide conformal connection between meshes to be able to produce a volume mesh.
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In an unstructured volume mesh it is impossible to guaranty a specific zone ratio over specific length of the model. The mesher GVol starts volume meshing from the surfaces (hard boundaries) and proceeds within the domains using special algorithms. You can set different element/face size on the surface meshes by properly remeshing them, and you can create several layers of surface meshes to assure that zone size gradation goes as desired.
The mesh you provided on the first image looks pretty good to me with finer size in and around the excavation zone and coarser in the outside domain. How else do you want to change this model?
