Vector of polylines

A polyline is a set of points defining the trajectory of a path.

Usage

polyline(..., id = NULL)

is_polyline(x)

as_polyline(x, ...)

Arguments

...

Various input for construction. See the Constructors sections

id

An integer vector of the same length as points, dividing the points into separate polylines (only used if points is a point vector)

x

A polyclid_polyline vector

Value

A polyclid_polyline vector

Constructors

• Providing a 2D points vector and no id will construct a single polyline

• Providing a 2D points vector and an id vector will create a vector of polylines

• Instead of a 2D point vector above you can provide x and y coordinates for the points directly.

• Providing a list of 2D point vectors will construct a vector of polylines

See also

To get a complete overview of the boolean operations possible with polylines see the dedicated help page on the topic

Other polylines: polyline_set()

Examples

sine <- polyline(
  seq(0, 2*pi, length.out = 20),
  sin(seq(0, 2*pi, length.out = 20))
)
loop <- polyline(
  c(0, 5, 6, 5, 0),
  c(-1, 1, 0, -1, 1)
)
polylines <- c(sine, loop)
plot(polylines, lty = c(1, 2))


is_selfintersecting(polylines)
#> [1] FALSE  TRUE

# Polylines can also be reversed so they are traversed in the opposite
# direction
reverse_orientation(polylines)
#> <2D polyclid_polylines [2]>
#> [1] [Path: 20, Range: <<0, -0.997>, <6.28, 0.997>>]
#> [2] [Path: 5, Range: <<0, -1>, <6, 1>>]