COMSOL Multiphysics™

geominfo
Out specifies the geometry information to retrieve and return as output arguments.
It is a cell array that can contain string equal to the entries given in Table 1-66.
Par is a cell array containing parameter values and corresponding numbers of
geometric entities. Par{m} is a cell containing the matrix Bm and the matrix Sm. Bm
is of size nm1-by-nm2, and gives the numbers of entities of dimension d for which
the parameters, in the nm1-by-nm2-by-d array Sm, are valid. Bm can also be a scalar or
a vector, and as such it is expanded to the size of Sm. Note that the size of the third
dimension in Sm, that is, d, defines if the entity number refers to a vertex (d = 0 or
Par{m} = {Bm}), an edge (d = 1), or a face (d = 2).
The following table lists the valid outputs to geominfo.
TABLE 1-66: OUTPUT ARGUMENTS
OUT 1D 2D 3D DESCRIPTION INPUT
PROPERTY
gd ♦ ♦ ♦ Geometry dimension
no ♦ ♦ ♦ Number of objects of the
dimensions specified in Od
adj ♦ ♦ ♦ Adjacency relations of entities in
Odp
Od
Odp
xx ♦ ♦ ♦ Coordinate information Par
dx ♦ ♦ First-order derivative information Par
ddx ♦ ♦ Second-order derivative
information
Par
nor ♦ ♦ Normal vector information Par
ff1 ♦ First fundamental matrices Par
ff2 ♦ Second fundamental matrices Par
crv ♦ ♦ Curvature information Par
rng ♦ ♦ Parameter range of geometric
entities
Od
ud ♦ ♦ ♦ Up and down subdomains
se ♦ ♦ ♦ Start and end vertices of all 1D
primitive objects
nmr ♦ ♦ ♦ Number of subdomains
nbs ♦ ♦ ♦ Number of boundary segments
mp ♦ Coordinates of vertices
sd ♦ Vertex subdomain numbers
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