Gmsh Reference Manual

The documentation for Gmsh 2.8

A finite element mesh generator with built-in pre- and post-processing facilities

February 9, 2014

Christophe Geuzaine
Jean-François Remacle

Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.

Gmsh

Christophe Geuzaine and Jean-François Remacle

Gmsh is an automatic 3D finite element mesh generator with build-in pre- and post-processing facilities. This is the Gmsh Reference Manual for Gmsh 2.8 (February 9, 2014).

— The Detailed Node Listing — Overview
Obtaining Gmsh		Where to get your copy of Gmsh
Copying conditions		Terms and conditions of use
1 Overview		What is Gmsh?
2 How to read this reference manual?		Which parts of this manual should you read (if any)?
3 Running Gmsh on your system		How can you run Gmsh on your machine?
4 General tools		Description of general commands and options
5 Geometry module		Description of all Geometry commands
6 Mesh module		Description of all Mesh commands
7 Solver module		Description of all Solver commands
8 Post-processing module		Description of all Post-Processing commands
9 File formats		Input and output file formats
Appendix A Tutorial		A step-by-step tutorial
Appendix B Options		List of all available options
Appendix C Compiling the source code		Information on how to comile Gmsh from source
Appendix D Information for developers		Information for Gmsh developers
Appendix E Frequently asked questions		The Gmsh FAQ
Appendix F Version history		Changelog
Appendix G Copyright and credits		Copyright information and list of contributors
Appendix H License		Complete copy of the license
Concept index		Index of concepts
Syntax index		Index of reserved keywords in the Gmsh language
1.1 Geometry: geometrical entity definition
1.2 Mesh: finite element mesh generation
1.3 Solver: external solver interface
1.4 Post-processing: scalar, vector and tensor field visualization
1.5 What Gmsh is pretty good at …
1.6 … and what Gmsh is not so good at
1.7 Bug reports
How to read this reference manual?
2.1 Syntactic rules used in the manual
Running Gmsh on your system
3.1 Interactive mode
3.2 Non-interactive mode
3.3 Command-line options
3.4 Mouse actions
3.5 Keyboard shortcuts
General tools
4.1 Comments
4.2 Expressions
4.3 Operators
4.4 Built-in functions
4.5 User-defined functions
4.6 Loops and conditionals
4.7 General commands
4.8 General options
Expressions
4.2.1 Floating point expressions
4.2.2 Character expressions
4.2.3 Color expressions
Geometry module
5.1 Geometry commands
5.2 Geometry options
Geometry commands
5.1.1 Points
5.1.2 Lines
5.1.3 Surfaces
5.1.4 Volumes
5.1.5 Extrusions
5.1.6 Transformations
5.1.7 Miscellaneous
Mesh module
6.1 Choosing the right unstructured algorithm
6.2 Elementary vs. physical entities
6.3 Mesh commands
6.4 Mesh options
Mesh commands
6.3.1 Specifying mesh element sizes
6.3.2 Structured grids
6.3.3 Miscellaneous
Solver module
7.1 Solver options
Post-processing module
8.1 Post-processing commands
8.2 Post-processing plugins
8.3 Post-processing options
File formats
9.1 MSH ASCII file format
9.2 MSH binary file format
9.3 Node ordering
9.4 Legacy formats
Legacy formats
9.4.1 MSH file format version 1.0 (Legacy)
9.4.2 POS ASCII file format (Legacy)
9.4.3 POS binary file format (Legacy)
Tutorial
A.1 ‘`t1.geo`’
A.2 ‘`t2.geo`’
A.3 ‘`t3.geo`’
A.4 ‘`t4.geo`’
A.5 ‘`t5.geo`’
A.6 ‘`t6.geo`’
A.7 ‘`t7.geo`’
A.8 ‘`t8.geo`’
A.9 ‘`t9.geo`’
A.10 ‘`t10.geo`’
A.11 ‘`t11.geo`’
A.12 ‘`t12.geo`’
A.13 ‘`t13.geo`’
A.14 ‘`t14.geo`’
A.15 ‘`t15.geo`’
Options
B.1 General options list
B.2 Geometry options list
B.3 Mesh options list
B.4 Solver options list
B.5 Post-processing options list
Information for developers
D.1 Source code structure
D.2 Coding style
D.3 Adding a new option
Frequently asked questions
E.1 The basics
E.2 Installation problems
E.3 General questions
E.4 Geometry module
E.5 Mesh module
E.6 Solver module
E.7 Post-processing module

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