fmesher_fem {fmesher}

Finite element matrix computation

Description

Construct finite element structure matrices

Usage

fmesher_fem(mesh_loc, mesh_tv, fem_order_max, aniso, options)

Arguments

mesh_loc

numeric matrix; mesh vertex coordinates

mesh_tv

3-column integer matrix with 0-based vertex indices for each triangle

fem_order_max

integer; the highest operator order to compute

aniso

If non-NULL, a list(gamma, v). Calculates anisotropic structure matrices (in addition to the regular) for \gamma and v for an anisotropic operator \nabla\cdot H \nabla, where H=\gamma I + v v^\top. Currently (2023-08-05) the fields need to be given per vertex.

options

list of triangulation options (sphere_tolerance)

Value

A list of matrices

Examples

m <- fmesher_rcdt(list(cet_margin = 1), matrix(0, 1, 2))
b <- fmesher_fem(m$s, m$tv, fem_order_max = 2, aniso = NULL, options = list())