This object is able to store any element in any dimension even if you mix elements with different dimensions.
M = gf_mesh('empty', int dim)
M = gf_mesh('cartesian', vec X[, vec Y[, vec Z,..]])
M = gf_mesh('cartesian Q1', vec X, vec Y[, vec Z,..])
M = gf_mesh('triangles grid', vec X, vec Y)
M = gf_mesh('regular simplices', vec X[, vec Y[, vec Z,...]]['degree', int k]['noised'])
M = gf_mesh('curved', mesh m, vec F)
M = gf_mesh('prismatic', mesh m, int nl[, int degree])
M = gf_mesh('pt2D', mat P, imat T[, int n])
M = gf_mesh('ptND', mat P, imat T)
M = gf_mesh('load', string filename)
M = gf_mesh('from string', string s)
M = gf_mesh('import', string format, string filename)
M = gf_mesh('clone', mesh m2)
M = gf_mesh('generate', mesher_object mo, scalar h[, int K = 1[, mat vertices]])
General constructor for mesh objects.
This object is able to store any element in any dimension even if you mix elements with different dimensions.
M = gf_mesh('empty', int dim)
Create a new empty mesh.
M = gf_mesh('cartesian', vec X[, vec Y[, vec Z,..]])
Build quickly a regular mesh of quadrangles, cubes, etc.
M = gf_mesh('cartesian Q1', vec X, vec Y[, vec Z,..])
Build quickly a regular mesh of quadrangles, cubes, etc. with Q1 elements.
M = gf_mesh('triangles grid', vec X, vec Y)
Build quickly a regular mesh of triangles.
This is a very limited and somehow deprecated function (See also
gf_mesh('ptND')
,
gf_mesh('regular simplices')
and
gf_mesh('cartesian')
).
M = gf_mesh('regular simplices', vec X[, vec Y[, vec Z,...]]['degree', int k]['noised'])
Mesh a n-dimensionnal parallelepipeded with simplices (triangles, tetrahedrons etc) . The optional degree may be used to build meshes with non linear geometric transformations.
M = gf_mesh('curved', mesh m, vec F)
Build a curved (n+1)-dimensions mesh from a n-dimensions mesh m
.
The points of the new mesh have one additional coordinate, given by
the vector F
. This can be used to obtain meshes for shells. m
may
be a mesh_fem object, in that case its linked mesh will be used.
M = gf_mesh('prismatic', mesh m, int nl[, int degree])
Extrude a prismatic mesh M
from a mesh m
.
In the additional dimension there are nl
layers of elements
distributed from 0
to
1
.
If the optional parameter
degree
is provided with a value greater
than the default value of 1
, a non-linear transformation of
corresponding degree is considered in the extrusion direction.
M = gf_mesh('pt2D', mat P, imat T[, int n])
Build a mesh from a 2D triangulation.
Each column of P
contains a point coordinate, and each column of T
contains the point indices of a triangle. n
is optional and is a
zone number. If n
is specified then only the zone number n
is
converted (in that case, T
is expected to have 4 rows, the fourth
containing these zone numbers).
M = gf_mesh('ptND', mat P, imat T)
Build a mesh from a n-dimensional "triangulation".
Similar function to 'pt2D', for building simplexes meshes from a
triangulation given in T
, and a list of points given in P
. The
dimension of the mesh will be the number of rows of P
, and the
dimension of the simplexes will be the number of rows of T
.
M = gf_mesh('load', string filename)
Load a mesh from a getfem++ ascii mesh file.
See also gf_mesh_get(mesh M, 'save', string filename)
.
M = gf_mesh('from string', string s)
Load a mesh from a string description.
For example, a string returned by gf_mesh_get(mesh M, 'char')
.
M = gf_mesh('import', string format, string filename)
Import a mesh.
format
may be:
- 'gmsh' for a mesh created with Gmsh
- 'gid' for a mesh created with GiD
- 'am_fmt' for a mesh created with EMC2
M = gf_mesh('clone', mesh m2)
Create a copy of a mesh.
M = gf_mesh('generate', mesher_object mo, scalar h[, int K = 1[, mat vertices]])
Call the experimental mesher of Getfem on the geometry
represented by mo
. please control the conformity of the produced mesh.
You can help the mesher by adding a priori vertices in the array
vertices
which should be of size n x m
where
n
n is the
dimension of the mesh and
m
the number of points.
h
is
approximate diameter of the elements. K
is the degree of the
mesh ( > 1 for curved boundaries). The mesher try to optimize the
quality of the elements. This operation may be time consuming.
Note that if the mesh generation fails, because of some random
procedure used, it can be run again since it will not give necessarily
the same result due to random procedures used.
The messages send to the console by the mesh generation can be
desactivated using gf_util('trace level', 2)
. More information
can be obtained by gf_util('trace level', 4)
. See gf_mesher_object
to manipulate geometric primitives in order to desribe the geometry.
Y. Collette