tetgen | Python interface to the C++ TetGen library to generate | Service Mesh library

I am using tetgen to generate meshes for my research.

My models have empty internal chambers inside them. For example, an empty box of size (5,5,5) inside a box of size (10, 10, 10). See image:

The problem is that tetgen generates tetrahedrons inside the empty chamber. Why? Is there a way to avoid it?

I tried using -YY, -q, -CC, -c, and their combinations, but all had the same problem, and did not give insight on the error. (http://wias-berlin.de/software/tetgen/1.5/doc/manual/manual005.html).

I had asked this question before but on github here , but never got farther into it. Now I have picked it up, and am trying to get this mesh tetrahedralized, but I keep getting errors see below. Ahlthough the statement clearly says "Found a segment and a subface intersect", I don't know how would I go about resolving that ? The question here is more precisely how to find if mesh has an open boundary and how to locate that and fix that in perhaps blender ? I am asking about open boundary since "camel.off" which clearly has an open boundary gives the same error. I even tried using another geometry processing tool but it showed no holes found, and its auto repair didn't work either. I get the obj file of Emily 3D scan and remove everything such as eye lashes, eyeballs, inner and outer extra subgeometries. I am using blender to export and using libigl tetgen example to see it if it works. I inspected the mesh, I don't see any holes in the topology, the base hole I fill up using the blender grid fill functionality. See the attached picture. In libigl I launched it in the viewer before processing with tetgen and it looks fine, I also tried all the blender clean up tool, see .

Is there a way to do some more preprocessing automatically before trying to create a tetrahedralized mesh that would ensure smooth operation ? Please advice.

I am editing a CMakeLists.txt file made by someone else. I'm trying to get rid of some of the warnings generated when compiling the project.

Normally I just add set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MY_FLAGS}") with whatever flags I need to add, and it works fine, but for this project, it's just not working. The warnings still appear. I tried a couple alternative methods, but nothing.

What could be causing the issue?

Qt Creator Nothing happen when call a static library from an application. I have these line of codes as my main.cpp main app file:

I have to compile a source code to get the executables. However, the make command fails to compile due to the presence of a parantheses with the following error message:

I have a tetrahedral mesh of a 3d region. The mesh is defined by two files with extensions .node and .ele which contain data related to nodes and elements (this is the format of output files from tetgen, the 3d Delaunay tetrahedralization program). The .node file contains in each line the node number and the x,y,z co-ordinates of that node. The .ele file contains the element number and node numbers corresponding to its four vertices. Now, given any point (x1,y1,z1), what is the easiest algorithm to decide which element this point belongs to?

I have a 3d mesh in .mesh format which can be read by medit visualization program. However I need to convert it into the .nodes, .ele and .face format that is the output format of tetgen (the 3d Delaunay tetrahedralization program) . What is the best way to do this conversion of formats? Is there a free program available to do this conversion?

Following example model shows a cylinder with some cell properties on the left . The „ModelFaceID“ is a property that defines the different faces of the model. The faces are highlighted in different colors in the 3D view (right):

On the spreadsheet, I can see that each cell has a specific „ModelFaceID“, which assigns the cell to one of the faces:

Now, I would like to change the „ModelFaceID“ in a new model that has only one face yet. I would like to select cells manually in the 3D View and change the „ModelFaceID“ respectively, so that I get different faces for the model. Unfortunately, I cannot change the property on the spreadsheet. Here, a picture with my new model. I selected the cells in the 3D view (left) and the spreadsheet (right):

How can I change the property? Can I achieve that in ParaView? Do you have any ideas which other tool I could use?

You can find the cylinder example here (cylinder.vtp): Cylinder Example

I am trying to compile dependencies of a C++ framework called FW4SPL with cmake in the terminal. By typing in the command make -j4, it will automatically download, build and install each dependency.

But there is an error during the compilation.