terra (version 1.8-5)

spin: spin a SpatVector

Description

Spin (rotate) the geometry of a SpatVector.

Usage

# S4 method for SpatVector
spin(x, angle, x0, y0)

Value

SpatVector

Arguments

x

SpatVector

angle

numeric. Angle of rotation in degrees

x0

numeric. x-coordinate of the center of rotation. If missing, the center of the extent of x is used

y0

numeric. y-coordinate of the center of rotation. If missing, the center of the extent of x is used

See Also

rescale, t, shift

Examples

f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
w <- spin(v, 180)
plot(v)
lines(w, col="red")

# lower-right corner as center
e <- as.vector(ext(v))
x <- spin(v, 45, e[1], e[3])