From 88321527c28d65831448887c9e6ade3611307ee2 Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Sun, 7 Dec 2003 05:37:00 +0000
Subject: [PATCH] New MSH file format, version 2.0.
********************************************************
************ Please send me your comments **************
********************************************************
---
Common/Context.h | 1 +
Common/DefaultOptions.h | 2 +
Common/Options.cpp | 9 ++-
Common/Options.h | 1 +
Fltk/Callbacks.cpp | 22 ++++++-
Mesh/Print_Mesh.cpp | 73 +++++++++++----------
Mesh/Read_Mesh.cpp | 48 ++++++++++++--
doc/VERSIONS | 3 +-
doc/texinfo/gmsh.texi | 141 +++++++++++++++++++++++++++++++++++++---
9 files changed, 244 insertions(+), 56 deletions(-)
diff --git a/Common/Context.h b/Common/Context.h
index a4f2afafde..3fb143eb4d 100644
--- a/Common/Context.h
+++ b/Common/Context.h
@@ -150,6 +150,7 @@ public :
// mesh options
struct {
+ double msh_file_version;
int vis_type, changed, display_lists;
int draw;
int points, lines, surfaces, volumes;
diff --git a/Common/DefaultOptions.h b/Common/DefaultOptions.h
index 891a6d366a..b40e9a9fc1 100644
--- a/Common/DefaultOptions.h
+++ b/Common/DefaultOptions.h
@@ -746,6 +746,8 @@ StringXNumber MeshOptions_Number[] = {
{ F|O, "MinimumCirclePoints" , opt_mesh_min_circ_points, 7. ,
"Minimum number of points used to mesh a circle" },
+ { F|O, "MshFileVersion" , opt_mesh_msh_file_version , 1.0 ,
+ "MSH mesh file version to generate" },
{ F, "NbHexahedra" , opt_mesh_nb_hexahedra , 0. ,
"Number of hexahedra in the current mesh" },
diff --git a/Common/Options.cpp b/Common/Options.cpp
index 3095d2e9bb..c9927ccc09 100644
--- a/Common/Options.cpp
+++ b/Common/Options.cpp
@@ -1,4 +1,4 @@
-// $Id: Options.cpp,v 1.127 2003-12-07 00:23:06 geuzaine Exp $
+// $Id: Options.cpp,v 1.128 2003-12-07 05:37:00 geuzaine Exp $
//
// Copyright (C) 1997-2003 C. Geuzaine, J.-F. Remacle
//
@@ -3243,6 +3243,13 @@ double opt_mesh_format(OPT_ARGS_NUM)
return CTX.mesh.format;
}
+double opt_mesh_msh_file_version(OPT_ARGS_NUM)
+{
+ if(action & GMSH_SET)
+ CTX.mesh.msh_file_version = val;
+ return CTX.mesh.msh_file_version;
+}
+
double opt_mesh_nb_smoothing(OPT_ARGS_NUM)
{
if(action & GMSH_SET)
diff --git a/Common/Options.h b/Common/Options.h
index c7e6c56317..a6344fff1d 100644
--- a/Common/Options.h
+++ b/Common/Options.h
@@ -354,6 +354,7 @@ double opt_mesh_line_width(OPT_ARGS_NUM);
double opt_mesh_line_type(OPT_ARGS_NUM);
double opt_mesh_aspect(OPT_ARGS_NUM);
double opt_mesh_format(OPT_ARGS_NUM);
+double opt_mesh_msh_file_version(OPT_ARGS_NUM);
double opt_mesh_nb_smoothing(OPT_ARGS_NUM);
double opt_mesh_algo(OPT_ARGS_NUM);
double opt_mesh_point_insertion(OPT_ARGS_NUM);
diff --git a/Fltk/Callbacks.cpp b/Fltk/Callbacks.cpp
index 1422f978f9..c715f14ac7 100644
--- a/Fltk/Callbacks.cpp
+++ b/Fltk/Callbacks.cpp
@@ -1,4 +1,4 @@
-// $Id: Callbacks.cpp,v 1.196 2003-12-07 00:23:07 geuzaine Exp $
+// $Id: Callbacks.cpp,v 1.197 2003-12-07 05:37:00 geuzaine Exp $
//
// Copyright (C) 1997-2003 C. Geuzaine, J.-F. Remacle
//
@@ -439,6 +439,20 @@ void _save_msh_all(char *name)
CreateOutputFile(name, CTX.mesh.format = FORMAT_MSH);
CTX.mesh.save_all = all;
}
+void _save_msh_v2(char *name)
+{
+ double ver = CTX.mesh.msh_file_version;
+ CTX.mesh.msh_file_version = 2.0;
+ _save_msh(name);
+ CTX.mesh.msh_file_version = ver;
+}
+void _save_msh_all_v2(char *name)
+{
+ double ver = CTX.mesh.msh_file_version;
+ CTX.mesh.msh_file_version = 2.0;
+ _save_msh_all(name);
+ CTX.mesh.msh_file_version = ver;
+}
void _save_gref(char *name)
{
CreateOutputFile(name, CTX.mesh.format = FORMAT_GREF);
@@ -608,8 +622,10 @@ void file_save_as_cb(CALLBACK_ARGS)
{"By extension (*)", _save_auto},
{"Gmsh options (*.opt)", _save_geo_options},
{"Gmsh unrolled geometry (*.geo)", _save_geo},
- {"Gmsh mesh (*.msh)", _save_msh},
- {"Gmsh mesh without physicals (*.msh)", _save_msh_all},
+ {"Gmsh mesh v1.0 (*.msh)", _save_msh},
+ {"Gmsh mesh v1.0 without physicals (*.msh)", _save_msh_all},
+ {"Gmsh mesh v2.0 (*.msh)", _save_msh_v2},
+ {"Gmsh mesh v2.0 without physicals (*.msh)", _save_msh_all_v2},
{"GREF mesh (*.gref)", _save_gref},
{"I-DEAS universal mesh format (*.unv)", _save_unv},
{"VRML surface mesh (*.wrl)", _save_vrml},
diff --git a/Mesh/Print_Mesh.cpp b/Mesh/Print_Mesh.cpp
index 511770ca99..44e9af5b81 100644
--- a/Mesh/Print_Mesh.cpp
+++ b/Mesh/Print_Mesh.cpp
@@ -1,4 +1,4 @@
-// $Id: Print_Mesh.cpp,v 1.45 2003-12-07 02:56:34 geuzaine Exp $
+// $Id: Print_Mesh.cpp,v 1.46 2003-12-07 05:37:00 geuzaine Exp $
//
// Copyright (C) 1997-2003 C. Geuzaine, J.-F. Remacle
//
@@ -49,7 +49,6 @@ static FILE *meshfile;
#define PYRAMID_2 14
#define POINT 15
-static double MSH_VERSION = 1.0;
static int MSH_VOL_NUM, MSH_SUR_NUM, MSH_LIN_NUM;
static int MSH_NODE_NUM, MSH_ELEMENT_NUM, MSH_3D, MSH_ADD;
static int MSH_PHYSICAL_NUM, MSH_PHYSICAL_ORI;
@@ -90,16 +89,16 @@ void process_msh_nodes(Mesh * M)
MSH_NODE_NUM = Tree_Nbr(M->Vertices);
- if(MSH_VERSION > 1.0)
+ if(CTX.mesh.msh_file_version == 2.0)
fprintf(meshfile, "$Nodes\n");
else
fprintf(meshfile, "$NOD\n");
fprintf(meshfile, "%d\n", MSH_NODE_NUM);
Tree_Action(M->Vertices, print_msh_node);
- if(MSH_VERSION > 1.0)
- fprintf(meshfile, "$ENDNOD\n");
- else
+ if(CTX.mesh.msh_file_version == 2.0)
fprintf(meshfile, "$EndNodes\n");
+ else
+ fprintf(meshfile, "$ENDNOD\n");
}
void print_msh_simplex(void *a, void *b)
@@ -168,11 +167,10 @@ void print_msh_simplex(void *a, void *b)
}
}
- if(MSH_VERSION > 1.0)
- fprintf(meshfile, "%d %d %d %d 0 %d",
- MSH_ELEMENT_NUM++, type,
- MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*S)->iEnt, (*S)->iEnt,
- nbn + nbs);
+ if(CTX.mesh.msh_file_version == 2.0)
+ fprintf(meshfile, "%d %d 2 %d %d",
+ MSH_ELEMENT_NUM++, type, MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*S)->iEnt,
+ (*S)->iEnt);
else
fprintf(meshfile, "%d %d %d %d %d",
MSH_ELEMENT_NUM++, type,
@@ -218,11 +216,10 @@ void print_msh_hexahedron(void *a, void *b)
else
type = HEXAHEDRON;
- if(MSH_VERSION > 1.0)
- fprintf(meshfile, "%d %d %d %d 0 %d",
- MSH_ELEMENT_NUM++, type,
- MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*H)->iEnt, (*H)->iEnt,
- nbn + nbs);
+ if(CTX.mesh.msh_file_version == 2.0)
+ fprintf(meshfile, "%d %d 2 %d %d",
+ MSH_ELEMENT_NUM++, type, MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*H)->iEnt,
+ (*H)->iEnt);
else
fprintf(meshfile, "%d %d %d %d %d",
MSH_ELEMENT_NUM++, type,
@@ -261,11 +258,10 @@ void print_msh_prism(void *a, void *b)
type = PRISM;
}
- if(MSH_VERSION > 1.0)
- fprintf(meshfile, "%d %d %d %d 0 %d",
- MSH_ELEMENT_NUM++, type,
- MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*P)->iEnt, (*P)->iEnt,
- nbn + nbs);
+ if(CTX.mesh.msh_file_version == 2.0)
+ fprintf(meshfile, "%d %d 2 %d %d",
+ MSH_ELEMENT_NUM++, type, MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*P)->iEnt,
+ (*P)->iEnt);
else
fprintf(meshfile, "%d %d %d %d %d",
MSH_ELEMENT_NUM++, type,
@@ -304,11 +300,10 @@ void print_msh_pyramid(void *a, void *b)
type = PYRAMID;
}
- if(MSH_VERSION > 1.0)
- fprintf(meshfile, "%d %d %d %d 0 %d",
- MSH_ELEMENT_NUM++, type,
- MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*P)->iEnt, (*P)->iEnt,
- nbn + nbs);
+ if(CTX.mesh.msh_file_version == 2.0)
+ fprintf(meshfile, "%d %d 2 %d %d",
+ MSH_ELEMENT_NUM++, type, MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : (*P)->iEnt,
+ (*P)->iEnt);
else
fprintf(meshfile, "%d %d %d %d %d",
MSH_ELEMENT_NUM++, type,
@@ -330,10 +325,10 @@ void print_msh_point(Vertex * V)
return;
}
- if(MSH_VERSION > 1.0)
- fprintf(meshfile, "%d %d %d %d 0 1 %d\n",
- MSH_ELEMENT_NUM++, POINT,
- MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : V->Num, V->Num, V->Num);
+ if(CTX.mesh.msh_file_version == 2.0)
+ fprintf(meshfile, "%d %d 2 %d %d %d\n",
+ MSH_ELEMENT_NUM++, POINT, MSH_PHYSICAL_NUM ? MSH_PHYSICAL_NUM : V->Num, V->Num,
+ V->Num);
else
fprintf(meshfile, "%d %d %d %d 1 %d\n",
MSH_ELEMENT_NUM++, POINT,
@@ -502,7 +497,7 @@ void process_msh_elements(Mesh * M)
else
print_msh_elements(M);
- if(MSH_VERSION > 1.0)
+ if(CTX.mesh.msh_file_version == 2.0)
fprintf(meshfile, "$Elements\n");
else
fprintf(meshfile, "$ELM\n");
@@ -519,7 +514,7 @@ void process_msh_elements(Mesh * M)
else
print_msh_elements(M);
- if(MSH_VERSION > 1.0)
+ if(CTX.mesh.msh_file_version == 2.0)
fprintf(meshfile, "$EndElements\n");
else
fprintf(meshfile, "$ENDELM\n");
@@ -1399,12 +1394,20 @@ void Print_Mesh(Mesh * M, char *c, int Type)
switch(Type){
case FORMAT_MSH:
- MSH_VERSION = 0.0;
- if(MSH_VERSION > 1.0){
+ if(CTX.mesh.msh_file_version == 1.0){
+ // OK, no header
+ }
+ else if(CTX.mesh.msh_file_version == 2.0){
fprintf(meshfile, "$MeshFormat\n");
- fprintf(meshfile, "%g %d %d\n", MSH_VERSION, LIST_FORMAT_ASCII, sizeof(double));
+ fprintf(meshfile, "%g %d %d\n", CTX.mesh.msh_file_version,
+ LIST_FORMAT_ASCII, sizeof(double));
fprintf(meshfile, "$EndMeshFormat\n");
}
+ else{
+ Msg(GERROR, "Unknown MSH file version to generate (%g)",
+ CTX.mesh.msh_file_version);
+ return;
+ }
process_msh_nodes(M);
process_msh_elements(M);
Msg(INFO, "%d nodes", MSH_NODE_NUM);
diff --git a/Mesh/Read_Mesh.cpp b/Mesh/Read_Mesh.cpp
index 002cde66aa..6dcdd86787 100644
--- a/Mesh/Read_Mesh.cpp
+++ b/Mesh/Read_Mesh.cpp
@@ -1,4 +1,4 @@
-// $Id: Read_Mesh.cpp,v 1.61 2003-12-07 02:56:34 geuzaine Exp $
+// $Id: Read_Mesh.cpp,v 1.62 2003-12-07 05:37:00 geuzaine Exp $
//
// Copyright (C) 1997-2003 C. Geuzaine, J.-F. Remacle
//
@@ -93,6 +93,7 @@ void Read_Mesh_MSH(Mesh * M, FILE * fp)
int format = LIST_FORMAT_ASCII, size = sizeof(double);
int Nbr_Nodes, Nbr_Elements, i_Node, i_Element;
int Num, Type, Physical, Elementary, Partition, i, j;
+ int NbTags, Tag;
double x, y, z, lc1, lc2;
Vertex *vert, verts[NB_NOD_MAX_ELM], *vertsp[NB_NOD_MAX_ELM], **vertspp;
Simplex *simp;
@@ -118,7 +119,15 @@ void Read_Mesh_MSH(Mesh * M, FILE * fp)
if(!strncmp(&String[1], "MeshFormat", 10)) {
fscanf(fp, "%lf %d %d\n", &version, &format, &size);
- Msg(INFO, "Detected mesh file format %g", version);
+
+ if(version == 2.0){
+ Msg(INFO, "Detected mesh file format %g", version);
+ }
+ else{
+ Msg(GERROR, "Unknown MSH file version to read (%g)", version);
+ return;
+ }
+
if(format == 0)
format = LIST_FORMAT_ASCII;
else if(format == 1)
@@ -129,7 +138,7 @@ void Read_Mesh_MSH(Mesh * M, FILE * fp)
}
}
- /* P T S */
+ /* POINTS -- this field is deprecated, and will eventually disappear */
if(!strncmp(&String[1], "PTS", 3) ||
!strncmp(&String[1], "Points", 6)) {
@@ -148,7 +157,7 @@ void Read_Mesh_MSH(Mesh * M, FILE * fp)
}
}
- /* N O E */
+ /* NODES */
if(!strncmp(&String[1], "NOD", 3) ||
!strncmp(&String[1], "NOE", 3) ||
@@ -197,8 +206,35 @@ void Read_Mesh_MSH(Mesh * M, FILE * fp)
Partition = Physical;
}
else{
- fscanf(fp, "%d %d %d %d %d %d",
- &Num, &Type, &Physical, &Elementary, &Partition, &Nbr_Nodes);
+ fscanf(fp, "%d %d %d", &Num, &Type, &NbTags);
+ Elementary = Physical = Partition = 1;
+ for(j = 0; j < NbTags; j++){
+ fscanf(fp, "%d", &Tag);
+ if(j == 0)
+ Physical = Tag;
+ else if(j == 1)
+ Elementary = Tag;
+ else if(j == 2)
+ Partition = Tag;
+ // ignore any other tags for now
+ }
+ switch (Type) {
+ case PNT : Nbr_Nodes = 1; break;
+ case LGN1: Nbr_Nodes = 2; break;
+ case LGN2: Nbr_Nodes = 3; break;
+ case TRI1: Nbr_Nodes = 3; break;
+ case TRI2: Nbr_Nodes = 6; break;
+ case QUA1: Nbr_Nodes = 4; break;
+ case QUA2: Nbr_Nodes = 8; break;
+ case TET1: Nbr_Nodes = 4; break;
+ case TET2: Nbr_Nodes = 10; break;
+ case HEX1: Nbr_Nodes = 8; break;
+ case HEX2: Nbr_Nodes = 20; break;
+ case PRI1: Nbr_Nodes = 6; break;
+ case PRI2: Nbr_Nodes = 15; break;
+ case PYR1: Nbr_Nodes = 5; break;
+ case PYR2: Nbr_Nodes = 13; break;
+ }
}
for(j = 0; j < Nbr_Nodes; j++)
diff --git a/doc/VERSIONS b/doc/VERSIONS
index b5bb0c9ad0..6247816d16 100644
--- a/doc/VERSIONS
+++ b/doc/VERSIONS
@@ -1,6 +1,7 @@
-$Id: VERSIONS,v 1.176 2003-12-07 00:29:47 geuzaine Exp $
+$Id: VERSIONS,v 1.177 2003-12-07 05:37:00 geuzaine Exp $
New in 1.51: initial support for visualizing mesh partitions;
+integrated version 2.0 of the MSH mesh file format;
New in 1.50: small changes to the visibility browser + made visibility
scriptable (new Show/Hide commands); fixed (rare) crash when deleting
diff --git a/doc/texinfo/gmsh.texi b/doc/texinfo/gmsh.texi
index 395027a640..8d5c443129 100644
--- a/doc/texinfo/gmsh.texi
+++ b/doc/texinfo/gmsh.texi
@@ -1,5 +1,5 @@
\input texinfo.tex @c -*-texinfo-*-
-@c $Id: gmsh.texi,v 1.91 2003-12-04 18:24:50 geuzaine Exp $
+@c $Id: gmsh.texi,v 1.92 2003-12-07 05:37:00 geuzaine Exp $
@c
@c Copyright (C) 1997-2003 C. Geuzaine, J.-F. Remacle
@c
@@ -235,6 +235,11 @@ File formats
* Gmsh parsed post-processing file format::
* Gmsh node ordering::
+Gmsh mesh file format
+
+* Version 1.0::
+* Version 2.0::
+
Bugs, versions and credits
* Bugs::
@@ -2605,9 +2610,24 @@ All non-parsed file formats have sections enclosed between @code{$KEY} and
@cindex File format, mesh
@cindex @file{.msh} file
-The @file{.msh} file format is Gmsh's native mesh file format. The file is
-divided in two sections, defining the nodes (@code{$NOD}-@code{$ENDNOD}) and
-the elements (@code{$ELM}-@code{$ENDELM}) in the mesh:
+@menu
+* Version 1.0::
+* Version 2.0::
+@end menu
+
+@c .........................................................................
+@c Version 1.0
+@c .........................................................................
+
+@node Version 1.0, Version 2.0, Gmsh mesh file format, Gmsh mesh file format
+@subsection Version 1.0
+
+The @file{.msh} file format, version 1.0, is Gmsh's old native mesh file
+format, now superseeded by the format described in @ref{Version 2.0}.
+
+In the @file{.msh} file format, version 1.0, the file is divided in two
+sections, defining the nodes (@code{$NOD}-@code{$ENDNOD}) and the elements
+(@code{$ELM}-@code{$ENDELM}) in the mesh:
@example
$NOD
@@ -2626,7 +2646,7 @@ $ENDELM
where
@table @code
@item @var{number-of-nodes}
-is the number of nodes in the mesh
+is the number of nodes in the mesh.
@item @var{node-number}
is the number (index) of the @var{n}-th node in the mesh. Note that the
@@ -2638,7 +2658,7 @@ are the floating point values giving the X, Y and Z coordinates of the
@var{n}-th node.
@item @var{number-of-elements}
-is the number of elements in the mesh
+is the number of elements in the mesh.
@item @var{elm-number}
is the number (index) of the @var{n}-th element in the mesh. Note that the
@@ -2674,15 +2694,116 @@ is the number of the elementary entity to which the element belongs.
@item @var{number-of-nodes}
is the number of nodes for the @var{n}-th element. This is redundant, but
-kept for backward compatibility. The redundancy may disappear in the future
-if higher order elements are implemented using the same @w{@var{elm-type}s}
-as the current ones.
+kept for backward compatibility.
@item @var{node-number-list}
is the list of the @var{number-of-nodes} node numbers of the @var{n}-th
element (separated by white space, without commas).
@end table
+@c .........................................................................
+@c Version 2.0
+@c .........................................................................
+
+@node Version 2.0, , Version 1.0, Gmsh mesh file format
+@subsection Version 2.0
+
+The version 2.0 of the @file{.msh} file format is the Gmsh's new native mesh
+file format. It will eventually become the new default mesh format generated
+by Gmsh. This new format is very similar to the old one, but is more
+general: it contains information about itself and allows to attach an
+arbitrary number of tags to each element.
+
+The @file{.msh} file format, version 2.0, is divided in three sections,
+defining the file format (@code{$MeshFormat}-@code{$EndMeshFormat}), the
+nodes (@code{$Nodes}-@code{$EndNodes}) and the elements
+(@code{$Elements}-@code{$EndElements}) in the mesh:
+
+@example
+$MeshFormat
+2.0 @var{file-type} @var{data-size}
+$EndMeshFormat
+$Nodes
+@var{number-of-nodes}
+@var{node-number} @var{x-coord} @var{y-coord} @var{z-coord}
+@dots{}
+$EndNodes
+$Elements
+@var{number-of-elements}
+@var{elm-number} @var{elm-type} @var{number-of-tags} < @var{tag} > @dots{} @var{node-number-list}
+@dots{}
+$EndElements
+@end example
+
+@noindent
+where
+@table @code
+@item @var{file-type}
+is an integer equal to 0 in the ASCII file format.
+
+@item @var{data-size}
+is an integer equal to the size of the floating point numbers used in the
+file (usually, @var{data-size} = sizeof(double)).
+
+@item @var{number-of-nodes}
+is the number of nodes in the mesh.
+
+@item @var{node-number}
+is the number (index) of the @var{n}-th node in the mesh. Note that the
+@w{@var{node-number}s} do not have to be given in a consecutive (or even an
+ordered) way.
+
+@item @var{x-coord} @var{y-coord} @var{z-coord}
+are the floating point values giving the X, Y and Z coordinates of the
+@var{n}-th node.
+
+@item @var{number-of-elements}
+is the number of elements in the mesh.
+
+@item @var{elm-number}
+is the number (index) of the @var{n}-th element in the mesh. Note that the
+@w{@var{elm-number}s} do not have to be given in a consecutive (or even an
+ordered) way.
+
+@item @var{elm-type}
+defines the geometrical type of the @var{n}-th element:
+@table @code
+@item 1
+Line (2 nodes, 1 edge).
+@item 2
+Triangle (3 nodes, 3 edges).
+@item 3
+Quadrangle (4 nodes, 4 edges).
+@item 4
+Tetrahedron (4 nodes, 6 edges, 4 faces).
+@item 5
+Hexahedron (8 nodes, 12 edges, 6 faces).
+@item 6
+Prism (6 nodes, 9 edges, 5 faces).
+@item 7
+Pyramid (5 nodes, 8 edges, 5 faces).
+@item 15
+Point (1 node).
+@end table
+
+@item @var{number-of-tags}
+gives the number of (integer) tags for the @var{n}-th element. By default,
+Gmsh generates meshes with two tags, but can read files with an arbitrary
+number of tags (and currently only interprets the three first ones: see
+below).
+
+@item @var{tag}
+is an integer tag associated with the @var{n}-th element. By default, the
+first tag is the number of the physical entity to which the element belongs;
+the second tag is the number of the elementary geometrical entity to which
+the element belongs; the third tag is the number of a mesh partition to
+which the element belongs.
+
+@item @var{node-number-list}
+is the list of the node numbers of the @var{n}-th element (separated by
+white space, without commas).
+@end table
+
@c -------------------------------------------------------------------------
@c Gmsh ASCII post-processing file format
@c -------------------------------------------------------------------------
@@ -2752,7 +2873,7 @@ is an integer equal to 0 in the ASCII file format.
@item @var{data-size}
is an integer equal to the size of the floating point numbers used in the
-file (usually, data-size = sizeof(double)).
+file (usually, @var{data-size} = sizeof(double)).
@item @var{view-name}
is a string containing the name of the view (max. 256 characters).
--
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