Create or instantiate an graph class graph from the faces of an icosahedral grid

The function can be applied to both grids and to facelayer-class object of logical values. The resulting graph will have the characteristics of the original grid (directed/undirected etc.).

Usage

gridgraph(x, ...)

# S4 method for trigrid
gridgraph(x, directed = FALSE, distances = FALSE)

# S4 method for hexagrid
gridgraph(x, directed = FALSE, distances = FALSE)

# S4 method for facelayer
gridgraph(x)

Arguments

x

(trigrid, hexagrid or facelayer) The icosahedral grid or facelayer.

...

Arguments passed to the class specific methods.

directed

logical Defaults to FALSE, creating an undirected graph. If TRUE, then the graph will be directed.

distances

logical Defaults to FALSE. If TRUE, then the distances between the linked faces will be calculated and will be rendered to the edges as "dist".

Value

The function returns an undirected igraph graph.