/usr/lib/x86_64-linux-gnu/scilab-getfem++/help/en_US/gf_mesh_set.xml is in scilab-getfem++ 4.2.1~beta1~svn4635~dfsg-3+b1.
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<refentry version="5.0-subset Scilab" xml:id="gf_mesh_set" xml:lang="en"
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<refnamediv>
<refname>gf_mesh_set</refname>
<refpurpose> General function for modification of a mesh object.
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>PIDs = gf_mesh_set(mesh M, 'pts', mat PTS)</synopsis>
<synopsis>PIDs = gf_mesh_set(mesh M, 'add point', mat PTS)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'del point', ivec PIDs)</synopsis>
<synopsis>CVIDs = gf_mesh_set(mesh M, 'add convex', geotrans GT, mat PTS)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'del convex', mat CVIDs)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'del convex of dim', ivec DIMs)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'translate', vec V)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'transform', mat T)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'boundary', int rnum, mat CVFIDs)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'region', int rnum, mat CVFIDs)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'region intersect', int r1, int r2)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'region merge', int r1, int r2)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'region substract', int r1, int r2)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'delete boundary', int rnum, mat CVFIDs)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'delete region', ivec RIDs)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'merge', mesh m2)</synopsis>
<synopsis>gf_mesh_set(mesh M, 'optimize structure')</synopsis>
<synopsis>gf_mesh_set(mesh M, 'refine'[, ivec CVIDs])</synopsis>
</refsynopsisdiv>
<refsection>
<title>Description</title>
<para> General function for modification of a mesh object.
</para>
</refsection>
<refsection>
<title>Command list</title>
<itemizedlist>
<listitem>
<para><literal>PIDs = gf_mesh_set(mesh M, 'pts', mat PTS)</literal></para>
<para> Replace the coordinates of the mesh points with those given in <literal>PTS</literal>.
</para>
</listitem>
<listitem>
<para><literal>PIDs = gf_mesh_set(mesh M, 'add point', mat PTS)</literal></para>
<para> Insert new points in the mesh and return their #ids.
<literal>PTS</literal> should be an <literal></literal>nxm<literal></literal> matrix , where <literal></literal>n<literal></literal> is the mesh
dimension, and <literal></literal>m<literal></literal> is the number of points that will be
added to the mesh. On output, <literal>PIDs</literal> contains the point #ids
of these new points.
Remark: if some points are already part of the mesh (with a small
tolerance of approximately <literal></literal>1e-8<literal></literal>), they won't be inserted again,
and <literal>PIDs</literal> will contain the previously assigned #ids of these
points.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'del point', ivec PIDs)</literal></para>
<para> Removes one or more points from the mesh.
<literal>PIDs</literal> should contain the point #ids, such as the one returned by
the 'add point' command.
</para>
</listitem>
<listitem>
<para><literal>CVIDs = gf_mesh_set(mesh M, 'add convex', geotrans GT, mat PTS)</literal></para>
<para> Add a new convex into the mesh.
The convex structure (triangle, prism,...) is given by <literal>GT</literal>
(obtained with gf_geotrans('...')), and its points are given by
the columns of <literal>PTS</literal>. On return, <literal>CVIDs</literal> contains the convex #ids.
<literal>PTS</literal> might be a 3-dimensional array in order to insert more than
one convex (or a two dimensional array correctly shaped according
to Fortran ordering).
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'del convex', mat CVIDs)</literal></para>
<para> Remove one or more convexes from the mesh.
<literal>CVIDs</literal> should contain the convexes #ids, such as the ones
returned by the 'add convex' command.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'del convex of dim', ivec DIMs)</literal></para>
<para> Remove all convexes of dimension listed in <literal>DIMs</literal>.
For example; <literal></literal>gf_mesh_set(mesh M, 'del convex of dim', [1,2])<literal></literal> remove
all line segments, triangles and quadrangles.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'translate', vec V)</literal></para>
<para> Translates each point of the mesh from <literal>V</literal>.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'transform', mat T)</literal></para>
<para> Applies the matrix <literal>T</literal> to each point of the mesh.
Note that <literal>T</literal> is not required to be a <literal></literal>NxN<literal></literal> matrix (with
<literal></literal>N = gf_mesh_get(mesh M, 'dim')<literal></literal>). Hence it is possible to transform
a 2D mesh into a 3D one (and reciprocally).
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'boundary', int rnum, mat CVFIDs)</literal></para>
<para> DEPRECATED FUNCTION. Use 'region' instead.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'region', int rnum, mat CVFIDs)</literal></para>
<para> Assigns the region number <literal>rnum</literal> to the convex faces (or convexes)
stored in each column of the matrix <literal>CVFIDs</literal>.
The first row of <literal>CVFIDs</literal> contains a convex #ids, and the second row
contains a face number in the convex (or 0
for the whole convex (regions are usually used to store a list of
convex faces, but you may also use them to store a list of convexes).
If a vector is provided (or a one row matrix) the region will represent
the corresponding set of convex.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'region intersect', int r1, int r2)</literal></para>
<para> Replace the region number <literal>r1</literal> with its intersection with region number <literal>r2</literal>.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'region merge', int r1, int r2)</literal></para>
<para> Merge region number <literal>r2</literal> into region number <literal>r1</literal>.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'region substract', int r1, int r2)</literal></para>
<para> Replace the region number <literal>r1</literal> with its difference with region
number <literal>r2</literal>.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'delete boundary', int rnum, mat CVFIDs)</literal></para>
<para> DEPRECATED FUNCTION. Use 'delete region' instead.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'delete region', ivec RIDs)</literal></para>
<para> Remove the regions whose #ids are listed in <literal>RIDs</literal>
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'merge', mesh m2)</literal></para>
<para> Merge with the mesh <literal>m2</literal>.
Overlapping points won't be duplicated. If <literal>m2</literal> is a mesh_fem object,
its linked mesh will be used.
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'optimize structure')</literal></para>
<para> Reset point and convex numbering.
After optimisation, the points (resp. convexes) will
be consecutively numbered from 1 to gf_mesh_get(mesh M, 'max pid')
(resp. gf_mesh_get(mesh M, 'max cvid')).
</para>
</listitem>
<listitem>
<para><literal>gf_mesh_set(mesh M, 'refine'[, ivec CVIDs])</literal></para>
<para> Use a Bank strategy for mesh refinement.
If <literal>CVIDs</literal> is not given, the whole mesh is refined. Note
that the regions, and the finite element methods and
integration methods of the mesh_fem and mesh_im objects linked
to this mesh will be automagically refined.
</para>
</listitem>
</itemizedlist>
</refsection>
<refsection>
<title>See Also</title>
<simplelist type="inline">
<member><link linkend="getfem_types">getfem types</link></member>
</simplelist>
</refsection>
<refsection>
<title>Authors</title>
<para>Y. Collette</para>
</refsection>
</refentry>
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