Synopsis
gf_mesh_fem_set(mesh_fem MF, 'fem', fem f[, ivec CVids])
gf_mesh_fem_set(mesh_fem MF, 'classical fem', int k[, ivec CVids])
gf_mesh_fem_set(mesh_fem MF, 'classical discontinuous fem', int K[, @tscalar alpha[, ivec CVIDX]])
gf_mesh_fem_set(mesh_fem MF, 'qdim', int Q)
gf_mesh_fem_set(mesh_fem MF, 'reduction matrices', mat R, mat E)
gf_mesh_fem_set(mesh_fem MF, 'reduction', int s)
gf_mesh_fem_set(mesh_fem MF, 'reduce meshfem', mat RM)
gf_mesh_fem_set(mesh_fem MF, 'dof partition', ivec DOFP)
gf_mesh_fem_set(mesh_fem MF, 'set partial', ivec DOFs[, ivec RCVs])
gf_mesh_fem_set(mesh_fem MF, 'adapt')
gf_mesh_fem_set(mesh_fem MF, 'set enriched dofs', ivec DOFs)
Description :
General function for modifying mesh_fem objects.
Command list :
gf_mesh_fem_set(mesh_fem MF, 'fem', fem f[, ivec CVids])
Set the Finite Element Method.
Assign a FEM f to all convexes whose #ids are listed in CVids. If CVids is not given, the integration is assigned to all convexes.
See the help of gf_fem to obtain a list of available FEM methods.
gf_mesh_fem_set(mesh_fem MF, 'classical fem', int k[, ivec CVids])
Assign a classical (Lagrange polynomial) fem of order k to the mesh_fem.
Uses FEM_PK for simplexes, FEM_QK for parallelepipeds etc.
gf_mesh_fem_set(mesh_fem MF, 'classical discontinuous fem', int K[, @tscalar alpha[, ivec CVIDX]])
Assigns a classical (Lagrange polynomial) discontinuous fem or order K.
Similar to gf_mesh_fem_set(mesh_fem MF, ‘set classical fem’) except that FEM_PK_DISCONTINUOUS is used. Param alpha the node inset,
, where 0 implies usual dof nodes, greater values move the nodes toward the center of gravity, and 1 means that all degrees of freedom collapse on the center of gravity.
gf_mesh_fem_set(mesh_fem MF, 'qdim', int Q)
Change the Q dimension of the field that is interpolated by the mesh_fem.
Q = 1 means that the mesh_fem describes a scalar field, Q = N means that the mesh_fem describes a vector field of dimension N.
gf_mesh_fem_set(mesh_fem MF, 'reduction matrices', mat R, mat E)
Set the reduction and extension matrices and valid their use.gf_mesh_fem_set(mesh_fem MF, 'reduction', int s)
Set or unset the use of the reduction/extension matrices.gf_mesh_fem_set(mesh_fem MF, 'reduce meshfem', mat RM)
Set reduction mesh fem This function selects the degrees of freedom of the finite element method by selecting a set of independent vectors of the matrix RM. The numer of columns of RM should corresponds to the number of degrees of fredoom of the finite element method.gf_mesh_fem_set(mesh_fem MF, 'dof partition', ivec DOFP)
Change the ‘dof_partition’ array.
DOFP is a vector holding a integer value for each convex of the mesh_fem. See gf_mesh_fem_get(mesh_fem MF, ‘dof partition’) for a description of “dof partition”.
gf_mesh_fem_set(mesh_fem MF, 'set partial', ivec DOFs[, ivec RCVs])
Can only be applied to a partial mesh_fem. Change the subset of the degrees of freedom of mf.
If RCVs is given, no FEM will be put on the convexes listed in RCVs.
gf_mesh_fem_set(mesh_fem MF, 'adapt')
For a mesh_fem levelset object only. Adapt the mesh_fem object to a change of the levelset function.gf_mesh_fem_set(mesh_fem MF, 'set enriched dofs', ivec DOFs)
For a mesh_fem product object only. Set te enriched dofs and adapt the mesh_fem product.