COMSOL Multiphysics™

xmeshinfo
is requested for. The property Ldof is a cell array where the first row contains DOF
names, and the remaining rows contain local coordinates.
NUMBERING CONVENTIONS
The numbering provided by xmeshinfo corresponds to the numbering in the mesh
data structure (see femmesh). The extended mesh uses a different numbering
internally. All numberings are 1-based.
• Elements. For each mesh element type, the element numbering of femmesh is
used.
• Node points. The node points in femmesh have the same numbers in the extended
mesh. Additional node points have higher numbers (these are arbitrarily
ordered).
• Local node points. The numbering of the local node points within a mesh element
is different from the numbering in femmesh. However, the same definition of the
local coordinate system is used. In the extended mesh, the local node points are
ordered in lexicographical order of their local coordinates. In femmesh, the mesh
vertices come first, in lexicographical order, and then come the other node points
in lexicographical order (the latter are only present for a second-order mesh).
• DOFs. By default, the DOF number is the index in the complete set of degrees of
freedom of the model. If the property Solcomp is given, the DOF number is the
index in the set of DOFs solved for. If the property Null is given, it is assumed
that the Eliminate constraint handling method is used, and the DOF number is
the index in the set of unconstrained DOFs. This assumes a simple form of the
constraints, where each constraint only constrains one DOF. In other words, each
column of the Null matrix has a single nonzero element. If Null does not have
this form, an error message is given. The Null matrix is an output from the
solvers (see femlin).
OUTPUTS WITH GLOBAL SCOPE
mcases = xmeshinfo(xmesh,'out','mcases') returns an integer vector
containing all mesh cases in the extended mesh xmesh.
femindex = xmeshinfo(xmesh,'out','femindex') returns an integer vector
containing indices into xfem.fem for all geometries in xmesh. That is, geometry
geomnum in xmesh is xfem.fem{femindex(geomnum)}.geom.
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