Construct a 3D tetrahedralisation — fm_mesh

Constructs a 3D tetrahedralisation object.

Usage

fm_mesh_3d(loc = NULL, tv = NULL, ...)

fm_delaunay_3d(loc, ...)

Arguments

loc: Input coordinates that should be part of the mesh. Can be a matrix, sf, sfc, SpatialPoints, or other object supported by fm_unify_coords().
tv: Tetrahedron indices, as a N-by-4 index vector into loc
...: Currently unused.

Value

An fm_mesh_3d object

Functions

fm_delaunay_3d(): Construct a plain Delaunay triangulation in 3D. Requires the geometry package.

Examples

(m <- fm_mesh_3d(
  matrix(c(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0), 4, 3, byrow = TRUE),
  matrix(c(1, 2, 3, 4), 1, 4, byrow = TRUE)
))
#> fm_mesh_3d object:
#>   Manifold:	R3
#>   V / E / T / Tet:	4 / 6 / 4 / 1
#>   Euler char.:	1
#>   Bounding box: (0,1) x (0,1) x (0,1)
#>   Basis d.o.f.:	4
(m <- fm_delaunay_3d(matrix(rnorm(30), 10, 3)))
#> fm_mesh_3d object:
#>   Manifold:	R3
#>   V / E / T / Tet:	10 / 34 / 45 / 20
#>   Euler char.:	1
#>   Bounding box: (-0.8232612, 1.7637894) x (-2.446680, 2.648932) x (-1.4522998, 0.9412061)
#>   Basis d.o.f.:	10