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geometry (version 0.4.5)

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

18,775

Version

0.4.5

License

GPL (>= 3)

Maintainer

David Sterratt

Last Published

December 4th, 2019

Functions in geometry (0.4.5)

polyarea

Determines area of a polygon by triangle method.
pol2cart

Transform polar or cylindrical coordinates to Cartesian coordinates.
mesh.diff

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

Uniform desired edge length
mesh.dcircle

Circle distance function
mesh.drectangle

Rectangle distance function
matmax

Row-wise matrix functions
mesh.dsphere

Sphere distance function
bary2cart

Conversion of Barycentric to Cartesian coordinates
entry.value

Retrieve or set a list of array element values
feasible.point

Find point in intersection of convex hulls
extprod3d

Compute external- or `cross'- product of 3D vectors.
inhulln

Test if points lie in convex hull
intersectn

Compute convex hull of intersection of two sets of points
surf.tri

Find surface triangles from tetrahedral mesh
tetramesh

Render tetrahedron mesh (3D)
sph2cart

Transform spherical coordinates to Cartesian coordinates
tsearch

Search for the enclosing Delaunay convex hull
tsearchn

Search for the enclosing Delaunay convex hull
rbox

Generate various point distributions
halfspacen

Compute halfspace intersection about a point
to.mesh3d

Convert convhulln object to RGL mesh
trimesh

Display triangles mesh (2D)
cart2sph

If called with a single matrix argument then each row of c represents the Cartesian coordinate (x, y, z).
Unique

Extract Unique Rows
convhulln

Compute smallest convex hull that encloses a set of points
cart2pol

Transform Cartesian coordinates to polar or cylindrical coordinates.
delaunayn

Delaunay triangulation in N dimensions
dot

Compute the dot product of two vectors
distmeshnd

A simple mesh generator for non-convex regions in n-D space
cart2bary

Conversion of Cartesian to Barycentric coordinates.
distmesh2d

A simple mesh generator for non-convex regions