gmsh | Live clone of http : //gitlab.onelab.info/gmsh/gmsh | Build Tool library

by live-clones C++ Version: gmsh_4_11_1 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | gmsh Summary

gmsh is a C++ library typically used in Utilities, Build Tool applications. gmsh has no bugs, it has no vulnerabilities and it has low support. However gmsh has a Non-SPDX License. You can download it from GitHub.

Create a build directory, for example as a subdirectory of Gmsh's source directory:. To build the monolithic Gmsh app with the default build options, run cmake from within the build directory, pointing to Gmsh's source directory, then run "make". cd build cmake .. make. will install the Gmsh app in the standard system location (controlled by CMAKE_INSTALL_PREFIX - see below). To build the Gmsh app dynamically linked to the shared Gmsh library, which can then also be used by external codes through the C++, C, Python and Julia Gmsh API, run. cd build cmake -DENABLE_BUILD_DYNAMIC=1 .. make make install. This will install the Gmsh app and the shared Gmsh library, as well as the C++ and C include files and the Python and Julia modules.

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Quality

Security

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Support

gmsh has a low active ecosystem.

It has 58 star(s) with 35 fork(s). There are 12 watchers for this library.

It had no major release in the last 6 months.

gmsh has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of gmsh is gmsh_4_11_1

Quality

gmsh has no bugs reported.

Security

gmsh has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

gmsh has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

gmsh releases are not available. You will need to build from source code and install.

Installation instructions are available. Examples and code snippets are not available.

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gmsh Key Features

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gmsh Examples and Code Snippets

No Code Snippets are available at this moment for gmsh.

Community Discussions

Trending Discussions on gmsh

Problem when importing a mesh with Gmsh3D in Fipy

Best way to address outer mesh surfaces of a cylinder by FiPy ,

Creating a mesh within spherical shell with gmsh 4.7.1

gmsh: command not found

Problem in loading (.msh) file in fipy via Gmsh3D

KeyError:0 when using a python script to read and convert Gmsh output to a DNS code session file

Create single mesh for multiple bodies in GMSH

How to build and run C++ API demos in gmsh?

How to resolve gmsh Mesh generation errors

surface area of any gmsh model imported to fipy

QUESTION

Problem when importing a mesh with Gmsh3D in Fipy

Asked 2021-May-06 at 22:12

I am trying to import to Fipy a 3D mesh previously generated with Gmsh using the Gmsh3D function, like this:

...

ANSWER

Answered 2021-May-06 at 22:12

This line of output

Source https://stackoverflow.com/questions/67397771

QUESTION

Best way to address outer mesh surfaces of a cylinder by FiPy ,

Asked 2021-Mar-07 at 23:01

Could I address outer mesh face centers by any FiPy or ... modules? For a cylinder by radius of 'R', related meshes are created O'grid sweep-like on it. As it seems, 'R' is greater than the most outer mesh face centers; so there is a difference between them (FIG.) and can not be addressed by "R" easily.

I need to mention all outer mesh face centers around the cylinder wall (not top and bottom wall). The mesh system are imported by "FiPy Gmsh" (FiPy version = 3.1 and Python 2.7). FiPy 'solver.mesh.getFaceCenters()' get an simple array for mesh face centers. I think the cylinder wall related outer faces of outer hexagonal mesh layer could be addressed by code such below:

...

ANSWER

Answered 2021-Mar-07 at 23:01

This is discussed in the documentation for Gmsh2D.

Although it is possible to define such faces parametrically, it is necessary to allow some error in position due to the finite resolution of the discretized mesh. Far better to define the faces you want in the abstract geometry definition and refer to them directly, e.g., your GEO file in Gmsh would have something like

Source https://stackoverflow.com/questions/66522244

QUESTION

Creating a mesh within spherical shell with gmsh 4.7.1

Asked 2021-Feb-17 at 16:52

I'm trying to use gmsh 4.7.1 to create a mesh within a 3D volume, that is a sphere with a concentric spherical hole (in other words, I have a spherical shell). In order to do so, I wrote the following .geo file:

...

ANSWER

Answered 2021-Feb-17 at 16:52

There are several issues at play here:

Sphere command, already creates a volume, not surfaces as you expect.
due to the point above, the command Surface Loop(3) = {2}; is assumed to create a surface loop from a volume, which is 1) not a supported operation. 2) will try to use the surface with the tag 2. It is unclear, what it will do in reality (as a surface with the tag 2 probably still exists).
Thus, the Volume command gets some weird things as an input
and it is all connected with the fact that the characteristic length is not setup, thus the mesh density is quite arbitrary.

If you insist on using the OpenCASCADE kernel, you probably want to use boolean operations.

Here is the code I have with an arbitrarily chosen characteristic length of 0.05 for all the points defining the solid spherical shell:

Source https://stackoverflow.com/questions/66244775

QUESTION

gmsh: command not found

Asked 2020-Nov-19 at 11:01

I am using the university's clusters to run few computations using gmsh and getdp. I wrote a python script to automate the simulations. However, I keep getting the following error: -bash: gmsh: command not found even though I have added the gmsh executable to the folder. Any ideas of how can I deal with this? I've checked few gmsh forums where the commands proposed require sudo rights.

...

ANSWER

Answered 2020-Nov-19 at 11:01

It seems like the path variables are not added for gmsh

Source https://stackoverflow.com/questions/64909997

QUESTION

Problem in loading (.msh) file in fipy via Gmsh3D

Asked 2020-Nov-18 at 00:19

I'm trying to import my mesh file (.msh) from Gmsh 4.7.0 into FiPy==3.4.2.1 (Windows 10)(Python 2.7.9). This mesh was created using open source FEM software (Cast3M) and then it was exported to Gmsh as .MED file. Gmsh was viewing perfectly my mesh without any problem with the same number of elements and nodes. Then I proceed to export the mesh as .msh file from Gmsh. (File----Export----msh file---save). I was doing:

...

ANSWER

Answered 2020-Nov-13 at 16:30

FiPy only understands the msh2 format from Gmsh. Export from Gmsh with -format msh2.

Source https://stackoverflow.com/questions/64818780

QUESTION

KeyError:0 when using a python script to read and convert Gmsh output to a DNS code session file

Asked 2020-Jun-06 at 11:55

When i run the python script on the Gmsh output file I get the below error :

...

ANSWER

Answered 2020-Jun-06 at 11:55

From your above snippet I am assuming values of physidx will be of type int.

Source https://stackoverflow.com/questions/62231049

QUESTION

Create single mesh for multiple bodies in GMSH

Asked 2020-May-07 at 13:57

I am currently trying to do a magnetostatic FEM simulation and I want to mesh my geometry using GMSH. The geometry is shown below: in

I create the geometry using FreeCAD and import into GMSH as a .STEP File. In GMSH I define 3 physical groups, resulting in the following script:

...

ANSWER

Answered 2018-Dec-24 at 17:15

It seems that right now the Air volume 8 is just the overall bounding box, without necessary subtraction of volumes for Iron and Current. Thus, it creates a tetrahedral mesh for the entire bounding box without taking other bodies into the account.

I am not a FreeCAD expert, so I don't really know how to setup it properly there. Possibly, try specifying the Air volume there making sure it does not contain your detail.

Another approach could involve slight modifications at the GMSH level. For example, creating the proper Air volume before making it physical. You have volumes 1, 7, 9, 6, 3, 2, 4, 5 which you want to subtract from volume 8. That can be achieved by

Source https://stackoverflow.com/questions/53914425

QUESTION

How to build and run C++ API demos in gmsh?

Asked 2020-Apr-09 at 09:47

I want to use gmsh C++ API to develop software.

I can build the project using cmake from source file on Ubuntu and get a executable file "gmsh".

My problem is:

How to compile the program as a shared library?
How to compile C++ API demos with the shared library and run it?

May be it is a stupid problems, but I have trapped here for hours.

Is there any step by step instructions can help me?

...

ANSWER

Answered 2019-May-02 at 16:53

The detailed instructions can be found at

https://gitlab.onelab.info/gmsh/gmsh/blob/master/demos/api/README.txt

Source https://stackoverflow.com/questions/55949639

QUESTION

How to resolve gmsh Mesh generation errors

Asked 2020-Mar-16 at 18:13

I am trying to 3D mesh 10 ellipses with various aspect ratio's for an OpenFOAM simulation. I've noticed that I'm getting the same 3 meshing errors when I try to generate a 3D mesh. The 3 error messages are:

Error: Unable to recover the edge 405 (1/1219) on curve 1000 (on surface 1)
Error: Could not find extruded node (0.9090634994349311, -0.0009576995469135237, 1) in surface 1026
Error : No elements in volume 1

These messages appear on the majority of ellipses but the rest mesh with no problem.

I'm fairly new with gmsh so I'd appreciate an explanation of whats causing these errors and how I should go about resolving them.

I plan to use much more complex/amorphous shapes so I need to know that meshing of these shapes will be robust. Any tips on achieving robust meshing with this setup would also be appreciated.

Here's the 3D mesh file for one of the shapes(more can be provided if needed):

...

ANSWER

Answered 2020-Mar-16 at 18:13

The problem happens, since Spline(1000) is a closed-loop now by its own. That is less than desirable. In GMSH, one would prefer to define lines that form closed loops as at least two separate objects and then add them to the corresponding Line Loop.

So, the file with the following changes should create a mesh without any problems:

Source https://stackoverflow.com/questions/60706395

QUESTION

surface area of any gmsh model imported to fipy

Asked 2020-Jan-23 at 16:26

I would like to calculate the shell surface of any mesh imported into fipy via gmsh similar to cell Volumes:

...

ANSWER

Answered 2020-Jan-23 at 16:26

This should do it,

Source https://stackoverflow.com/questions/59869180

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install gmsh

Create a build directory, for example as a subdirectory of Gmsh's source directory:. To build the monolithic Gmsh app with the default build options, run cmake from within the build directory, pointing to Gmsh's source directory, then run "make". cd build cmake .. make. will install the Gmsh app in the standard system location (controlled by CMAKE_INSTALL_PREFIX - see below). To build the Gmsh app dynamically linked to the shared Gmsh library, which can then also be used by external codes through the C++, C, Python and Julia Gmsh API, run. cd build cmake -DENABLE_BUILD_DYNAMIC=1 .. make make install. This will install the Gmsh app and the shared Gmsh library, as well as the C++ and C include files and the Python and Julia modules.
Create a build directory, for example as a subdirectory of Gmsh's source directory: mkdir build
To build the monolithic Gmsh app with the default build options, run cmake from within the build directory, pointing to Gmsh's source directory, then run "make" cd build cmake .. make Optionally running make install will install the Gmsh app in the standard system location (controlled by CMAKE_INSTALL_PREFIX - see below).
To build the Gmsh app dynamically linked to the shared Gmsh library, which can then also be used by external codes through the C++, C, Python and Julia Gmsh API, run cd build cmake -DENABLE_BUILD_DYNAMIC=1 .. make make install This will install the Gmsh app and the shared Gmsh library, as well as the C++ and C include files and the Python and Julia modules.
To change build options you can use "ccmake" instead of "cmake", e.g.: ccmake .. or you can specify options directly on the command line. For example, you can use cmake -DCMAKE_PREFIX_PATH=/opt/local .. to specify the location of external packages installed in non-standard directories. You can use cmake -DCMAKE_INSTALL_PREFIX=/opt to change the installation directory. Or you could use cmake -DENABLE_FLTK=0 .. to build a version of Gmsh without the FLTK graphical interface. The list of all available configuration options is given in the reference manual.
To see a detailed compilation log use make VERBOSE=1
Launch CMake and fill-in the two top input fields (telling where the Gmsh source directory is located and where you want the Gmsh binary to be created). Click on "Add entry" and define the variable CMAKE_PREFIX_PATH, of type "PATH", pointing to the location(s) of any external package(s) (FLTK, BLAS/LAPACK, etc.) installed in non-standard directories. Click on "Configure" and choose your compiler. Optionally change some configuration options (re-run "Configure" every time you change some options). Once you are happy with all the configuration options, click on "Generate". Go to the build directory and build Gmsh using your chosen compiler.
Launch CMake and fill-in the two top input fields (telling where the Gmsh source directory is located and where you want the Gmsh binary to be created).
Click on "Add entry" and define the variable CMAKE_PREFIX_PATH, of type "PATH", pointing to the location(s) of any external package(s) (FLTK, BLAS/LAPACK, etc.) installed in non-standard directories.
Click on "Configure" and choose your compiler.
Optionally change some configuration options (re-run "Configure" every time you change some options).
Once you are happy with all the configuration options, click on "Generate".
Go to the build directory and build Gmsh using your chosen compiler.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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