From 9438d12fd7112fe1759e7f3b3b58b39cdf3cb2f6 Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Fri, 22 Feb 2019 13:15:29 +0100
Subject: [PATCH] small MSH4.1 example
---
doc/texinfo/gmsh.texi | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/doc/texinfo/gmsh.texi b/doc/texinfo/gmsh.texi
index 3075932fed..186cf240bc 100644
--- a/doc/texinfo/gmsh.texi
+++ b/doc/texinfo/gmsh.texi
@@ -3915,6 +3915,48 @@ file format (@pxref{MSH file format version 2}). These sections will be
reworked in a future minor revision of the version 4 format
(e.g. version 4.1 or 4.2).
+Below is a small example (a mesh consisting of two quadrangles with an
+associated nodal scalar dataset; the comments are not part of the actual
+file!):
+
+@smallexample
+$MeshFormat
+4.1 0 8 @emph{MSH4.1, ASCII}
+$EndMeshFormat
+$Nodes
+1 6 1 6 @emph{1 entity, 6 nodes, min/max node tags: 1 and 6}
+2 1 0 6 @emph{surface 1, no parametric coordinates, 6 nodes}
+1 0. 0. 0. @emph{ node #1: coordinates (0., 0., 0.)}
+2 1. 0. 0. @emph{ node #2: coordinates (1., 0., 0.)}
+3 1. 1. 0. @emph{ etc.}
+4 0. 1. 0.
+5 2. 0. 0.
+6 2. 1. 0.
+$EndNodes
+$Elements
+1 2 1 2 @emph{1 entity, 2 elements, min/max element tags: 1 and 2}
+2 1 3 2 @emph{surface 1, element type 3 (4-node quad), 2 elements}
+1 1 2 3 4 @emph{ quad #1: nodes 1 2 3 4}
+2 2 5 6 3 @emph{ quad #2: nodes 2 5 6 3}
+$EndElements
+$NodeData
+1 @emph{one string tag:}
+"A scalar view" @emph{ the name of the view ("A scalar view")}
+1 @emph{one real tag:}
+0.0 @emph{ the time value (0.0)}
+3 @emph{three integer tags:}
+0 @emph{ the time step (0; time steps always start at 0)}
+1 @emph{ 1-component (scalar) field}
+6 @emph{ six associated nodal values}
+1 0.0 @emph{value associated with node #1 (0.0)}
+2 0.1 @emph{value associated with node #2 (0.1)}
+3 0.2 @emph{etc.}
+4 0.0
+5 0.2
+6 0.4
+$EndNodeData
+@end smallexample
+
@c -------------------------------------------------------------------------
@c Node ordering
@c -------------------------------------------------------------------------
--
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