level = 0.0 // horizontal elevation region = 220 // range in meter depth = 100 Point ( 1 ) = // absorb boundary Mesh. Kinematic source example - 1994 Northridge earthquakeĬl = 1 // This file builds a rectangular box domain region which is exactly the same as topographic data.Manually fixing an intersection in Gocad.Adapting the CAD model resolution using Gocad.Generating a CAD model for a fully-coupled earthquake-tsunami simulation.Proposed workflow for generating a CAD model of a megathrust earthquake.Generating a CAD model using GOCAD: basic tutorial.Breaking changes in backward compatibility.Left lateral, right lateral, normal, reverse.# Make quads in the western part of the domainĮlement_types, element_ids, element_connectivity =. If anyone would have a hint it would be very welcome! cheers import gmsh_jll Here it’s clear that the length of element_ids does not correspond to the total number of elements (maybe one side?) and I have no idea how to recover the element to node list without known the total number of elment and their type (tri/quad). Then, I would like to compute element to node list (node to element list would be next on the to do list ). I try to construct a mesh where the west part contains triangles and the right contains quadrangles. Node3_id = element_connectivityīut what if, a mesh contains both quads and triangles? How could one recover the element to node list?īelow I’ve pasted a MWE that attempts to describe the problem. Nel = length(element_ids) # number of elements reads from length of number element idsĮ2n = zeros(Int16,nel,3) # element to node numbering Here, if I want to recover the element to node list based, I should do something like this (picked from another discourse post): # Extract elementsĮlement_types, element_ids, element_connectivity = (2,1) What still gives problems is that resulting arrays are not of size of number of elements nor of size of number of nodes (in my previous experiences with triangle, element to node arrays are size number of elements * number of node per element). Thanks I would have not realised that the data needed a cast to become readable at print (weird, I thougth that the difference between Uint64 and Int64 were about the sign). Which is does not really read like the connectivity list of element 1 for a human like me. While gmesh indicates ‘Info : 135 nodes 222 elements’ julia> element_connectivity Is returned in such an unusual (to me) format: julia> julia> typeof(element_connectivity) However, one more question, would you know why the data returned by element_types, element_ids, element_connectivity = (2,1) In fact, much better than any other alternatives I know so far (like writing vtk files and reading them in paraview…), a very good surprise. It’s great to have the gmsh popup window with a data picker and possibility to rotate the mesh (without latency!). I’ll meet on Zulip once I’ve also figured out how this one I’ve almost managed to do what I want with gmsh. Remember the order of the boundaries, as the GMSH GUI will label them with numbers that later need to be changed to a text name for OpenFOAM. I’d certainly be interested to try meshes.jl once it also provides this. I want to try some stuff on quads and also 3D, hence I’m checking alternatives to yes, I’d like to use a tesselation from a set of points. Python3 import gmsh import sys gmsh. Shewchuk’s triangle is indeed super useful and I really like to use it. We have a Zulip channel where the conversation can continue if you thanks, yes, I do use this option. We have plans to try to revive VoronoiDelaunay.jl and absorb the algorithm in an API that is compatible with the rest of the project, but that will take time.įeel free to reach out if you have questions. We do not provide tesselation algorithms yet. You can also take the result of any of the methods above and refine it into triangles or quadrangles: Meshes.jl currently provides the following discretization methods: On the other hand, Meshes.jl is a more ambitious project, written in Julia, which aims to include tesselation algorithms, but also other types of mesh generation such as triangulation of areas based on their boundary. Notice that Gmsh.jl and Triangulate.jl are wrappers to well-established libraries written in other languages that do this type of tesselation. I am assuming that you are interested in a specific type of mesh generation: tesselation from a set of points. Anyone know whether they can address the 4 points I mentioned above? So far, I have experience with Triangulate which address point 2 and 3. returning node to element and/or element to element connectivities.including regional attributes to elements.in 2D: the use either triangles or quadrangles.The surfaces bounding the volume are all planar. I would like to know if there exists a generic mesh generator (2D/3D) that allows for: Description and features: This is an example of volume meshing with tetrahedrons.
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