polyCub (version 0.9.0)

coerce-gpc-methods: Conversion between polygonal "owin" and "gpc.poly"

Description

Package polyCub implements converters between the classes "owin" of package spatstat.geom and "gpc.poly" of package gpclib.

Usage

owin2gpc(object)
gpc2owin(object, ...)
as.owin.gpc.poly(W, ...)

Value

The converted polygon of class "gpc.poly" or "owin", respectively. If package gpclib is not available, owin2gpc will just return the pts slot of the "gpc.poly" (no formal class) with a warning.

Arguments

object

an object of class "gpc.poly" or "owin", respectively.

...

further arguments passed to owin.

W

an object of class "gpc.poly".

Author

Sebastian Meyer

See Also

xylist

Examples

if (FALSE) { # requireNamespace("spatstat.geom")
## use example polygons from
example(plotpolyf, ask = FALSE)
letterR  # a simple "xylist"

letterR.owin <- spatstat.geom::owin(poly = letterR)
letterR.gpc_from_owin <- owin2gpc(letterR.owin)
## warns if "gpclib" is unavailable

if (is(letterR.gpc_from_owin, "gpc.poly")) {
  letterR.xylist_from_gpc <- xylist(letterR.gpc_from_owin)
  stopifnot(all.equal(letterR, lapply(letterR.xylist_from_gpc, `[`, 1:2)))
  letterR.owin_from_gpc <- gpc2owin(letterR.gpc_from_owin)
  stopifnot(all.equal(letterR.owin, letterR.owin_from_gpc))
}
}