CarToPol                Conversion of 3d Cartesian coordinates to polar
                        coordinates
PolToCar                Conversion of polar coordinates to 3d Cartesian
                        coordinates
SpLines                 Create a 'SpatialLines' class object from an
                        icosahedral grid
SpPolygons              Spatial polygons from an icosahedral grid
[,gridlayer,ANY,missing-method
                        Extraction from a gridlayer using indices
arcdist                 Calculation of distances along arcs
arcdistmat              Calculation of distance matrices along arcs
arcpoints               Calculation of point coordinates along an arc
arcs                    Function to plot a set of great circle arcs
                        between points
cellocator              Locate grid faces based on their positions on a
                        map
centers                 The face centers of an icosahedral grid object
chullsphere             Spherical convex hull.
edgelength              Lengths of grid edges
edges                   The edges of a 3d object
face2nb                 Make an spdep-style neighbor list for an
                        icosahedral grid
facelayer-class         A 'facelayer' linked to a 'trigrid' or
                        'hexagrid' object
faces                   The face names of a trigrid or hexagrid object
faces3d                 Methods of 3D face plotting.
gridensity              Icosahedral grid-based density estimation
                        Spatial density estimation algorithm based on
                        rotation of icosahedral grids.
gridgraph               Create or instantiate an 'graph' class graph
                        from the faces of an icosahedral grid
gridlabs                Labels of grid vertices, faces and edges.
gridlabs3d              Display the names of the grid elements in 3d
                        plots.
guides3d                Guides for 3d spherical plotting.
heatMapLegend           Legend for a heatmap with predefined colors.
hexagrid-class          Construct a penta-hexagonal icosahedral grid
hexguide                Tessellation guide to 'hexagrid' objects
holes                   Holes of shapes on an icosahedral grid
icosa                   Global Triangular and Hexa-Pentagonal Grids
                        Based on Tessellated Icosahedra
length,trigrid-method   The number of faces in a 'trigrid' or
                        'hexagrid' class object.
lines,trigrid-method    Lines method for the 'trigrid' and 'hexagrid'
                        classes
lines3d                 Methods of 3d line plotting
locate                  Basic lookup function of coordinates on an
                        icosahedral grid
names,gridlayer-method
                        The face names in a 'facelayer' class object
newgraph                Add an igraph object to a predefined slot in an
                        icosahedral grid
newsf                   Add a 'sf' object to a predefined slot in a
                        'trigrid' or 'hexagrid' object
newsp                   Add a 'SpatialPolygons' object to a predefined
                        slot in a 'trigrid' or 'hexagrid' object
occupied                Faces occupied by the specified object
orientation             Extracting and setting the grid orientation
patches                 Patches of shapes on an icosahedral grid
plot                    Plot method for the 'trigrid', 'hexagrid' or
                        'facelayer' classes
plot3d                  3d plotting of an icosahedral grid, its subset
                        or a data layer
pos                     Position of face centers and vertices on a grid
resample                Resampling of data involving a 'trigrid' or a
                        'hexagrid' object.
rotate,matrix-method    Rotation of 3d objects
rpsphere                Random point generation on the surface of a
                        sphere
saveOBJ                 Export trigrid class object as Wavefront .obj
                        file
spacing                 Spacing of cell centers
subset                  Subsetting an icosahedral grid or data layers
                        organized with them
surfacearea             Areas of grid cell surfaces
surfacecentroid         Surface centroid point of a spherical point
                        cloud
translate               Translating an icosahedral grid object in 3d
                        Cartesian space
trigrid-class           A triangular icosahedral grid
triguide                Tessellation guide to 'trigrid' objects
trishape                Shape distortions of the triangular faces and
                        subfaces
values                  Extract and replace values from a
                        gridlayer-derived object (e.g.
                        'link{facelayer}').
vertexradius            Calculate the vertex radii of icosahedral grid
                        faces
vertices                The vertices of an icosahedral grid object
vicinity                The neighbouring faces of faces in an
                        icosahedral grid
