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Make a 2D mesh object

Source: R/mesh_2d.R
fm_mesh_2d.Rd

Make a 2D mesh object

Usage

fm_mesh_2d(...)

fm_mesh_2d_inla(
  loc = NULL,
  loc.domain = NULL,
  offset = NULL,
  n = NULL,
  boundary = NULL,
  interior = NULL,
  max.edge = NULL,
  min.angle = NULL,
  cutoff = 1e-12,
  max.n.strict = NULL,
  max.n = NULL,
  plot.delay = NULL,
  crs = NULL,
  ...
)

Arguments

...

Currently passed on to fm_mesh_2d_inla

loc

Matrix of point locations to be used as initial triangulation nodes. Can alternatively be a sf, sfc, SpatialPoints or SpatialPointsDataFrame object.

loc.domain

Matrix of point locations used to determine the domain extent. Can alternatively be a SpatialPoints or SpatialPointsDataFrame object.

offset

The automatic extension distance. One or two values, for an inner and an optional outer extension. If negative, interpreted as a factor relative to the approximate data diameter (default=-0.10???)

n

The number of initial nodes in the automatic extensions (default=16)

boundary

one or more (as list) of fm_segm() objects, or objects supported by fm_as_segm()

interior

one object supported by fm_as_segm(), or (from version 0.2.0.9016) a list of such objects. If a list, the objects are joined into a single object.

max.edge

The largest allowed triangle edge length. One or two values.

min.angle

The smallest allowed triangle angle. One or two values. (Default=21)

cutoff

The minimum allowed distance between points. Point at most as far apart as this are replaced by a single vertex prior to the mesh refinement step.

max.n.strict

The maximum number of vertices allowed, overriding min.angle and max.edge (default=-1, meaning no limit). One or two values, where the second value gives the number of additional vertices allowed for the extension.

max.n

The maximum number of vertices allowed, overriding max.edge only (default=-1, meaning no limit). One or two values, where the second value gives the number of additional vertices allowed for the extension.

plot.delay

If logical TRUE or a negative numeric value, activates displaying the result after each step of the multi-step domain extension algorithm.

crs

An optional fm_crs(), sf::crs or sp::CRS object

Value

An fm_mesh_2d object.

Functions

  • fm_mesh_2d_inla(): Legacy method for INLA::inla.mesh.2d() Create a triangle mesh based on initial point locations, specified or automatic boundaries, and mesh quality parameters.

INLA compatibility

For mesh and curve creation, the fm_rcdt_2d_inla(), fm_mesh_2d_inla(), and fm_nonconvex_hull_inla() methods will keep the interface syntax used by INLA::inla.mesh.create(), INLA::inla.mesh.2d(), and INLA::inla.nonconvex.hull() functions, respectively, whereas the fm_rcdt_2d(), fm_mesh_2d(), and fm_nonconvex_hull() interfaces may be different, and potentially change in the future.

See also

fm_rcdt_2d(), fm_mesh_2d(), fm_delaunay_2d(), fm_nonconvex_hull(), fm_extensions(), fm_refine()

Other object creation and conversion: fm_as_collect(), fm_as_fm(), fm_as_lattice_2d(), fm_as_lattice_Nd(), fm_as_mesh_1d(), fm_as_mesh_2d(), fm_as_mesh_3d(), fm_as_segm(), fm_as_sfc(), fm_as_tensor(), fm_collect(), fm_lattice_2d(), fm_lattice_Nd(), fm_mesh_1d(), fm_segm(), fm_simplify(), fm_tensor()

Author

Finn Lindgren Finn.Lindgren@gmail.com

Examples

fm_mesh_2d_inla(boundary = fm_extensions(cbind(2, 1), convex = 1, 2))
#> fm_mesh_2d object:
#>   Manifold:	R2
#>   V / E / T:	32 / 69 / 38
#>   Euler char.:	1
#>   Constraints:	Boundary: 24 boundary edges (1 group: 1), Interior: 0 edges
#>   Bounding box: (1.002964,2.997036) x (0.002963687,1.997036313)
#>   Basis d.o.f.:	32