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geometry (version 0.5.0)

Mesh Generation and Surface Tessellation

Description

Makes the 'Qhull' library available in R, in a similar manner as in Octave and MATLAB. Qhull computes convex hulls, Delaunay triangulations, halfspace intersections about a point, Voronoi diagrams, furthest-site Delaunay triangulations, and furthest-site Voronoi diagrams. It runs in 2D, 3D, 4D, and higher dimensions. It implements the Quickhull algorithm for computing the convex hull. Qhull does not support constrained Delaunay triangulations, or mesh generation of non-convex objects, but the package does include some R functions that allow for this.

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Version

Install

install.packages('geometry')

Monthly Downloads

19,393

Version

0.5.0

License

GPL (>= 3)

Maintainer

Last Published

August 31st, 2024

Functions in geometry (0.5.0)

entry.value

Retrieve or set a list of array element values
dot

Compute the dot product of two vectors
mesh.dsphere

Sphere distance function
inhulln

Test if points lie in convex hull
polyarea

Determines area of a polygon by triangle method.
pol2cart

Transform polar or cylindrical coordinates to Cartesian coordinates.
intersectn

Compute convex hull of intersection of two sets of points
mesh.hunif

Uniform desired edge length
extprod3d

Compute external- or ‘cross’- product of 3D vectors.
mesh.diff

Difference, union and intersection operation on two regions
mesh.drectangle

Rectangle distance function
feasible.point

Find point in intersection of convex hulls
surf.tri

Find surface triangles from tetrahedral mesh
tsearch

Search for the enclosing Delaunay convex hull
to.mesh3d

Convert convhulln object to RGL mesh
tsearchn

Search for the enclosing Delaunay convex hull
halfspacen

Compute halfspace intersection about a point
tetramesh

Render tetrahedron mesh (3D)
trimesh

Display triangles mesh (2D)
rbox

Generate various point distributions
sph2cart

Transform spherical coordinates to Cartesian coordinates
cart2bary

Conversion of Cartesian to Barycentric coordinates.
cart2pol

Transform Cartesian coordinates to polar or cylindrical coordinates.
Unique

Extract Unique Rows
bary2cart

Conversion of Barycentric to Cartesian coordinates
cart2sph

Transform Cartesian to spherical coordinates
distmeshnd

A simple mesh generator for non-convex regions in n-D space
distmesh2d

A simple mesh generator for non-convex regions
convhulln

Compute smallest convex hull that encloses a set of points
matmax

Row-wise matrix functions
mesh.dcircle

Circle distance function
delaunayn

Delaunay triangulation in N dimensions