generate_random_polygon: Generate random polygon

In mathiasisaksen/artKIT: Useful functions for creating visual/generative art

Description

This function generates a random polygon. It uses the polar coordinate representation, where the angles are evenly spaced over the interval [0, 2pi] and the radiuses are sampled from a uniform distribution.

Usage

generate_random_polygon(
  center = c(0, 0),
  min.radius = 0.5,
  max.radius = 1,
  num.vertices = 5,
  seed = NULL
)

Arguments

center	The "center" of the polygon, which determines its position. Should either be a 1 x 2 data frame/matrix or a numeric vector with 2 elements.
min.radius, max.radius	The minimum and maximum bounds used in the uniform distribution that samples the radius values
num.vertices	The number of vertices that the random polygon should contain
seed	The seed used when sampling the radius value

Value

A data frame that contains one row per vertex in the polygon, and the columns x and y.

Author(s)

Mathias Isaksen [e-mail]

Examples

# A random polygon with center (5, 10) and 10 vertices. The distance from
# the center to the vertices is between 4 and 10
vertex.df = generate_random_polygon(
  center = c(5, 10),
  min.radius = 4,
  max.radius = 10,
  num.vertices = 10,
  seed = 123
)

library(ggplot2)
# The center of the polygon is shown in red
ggplot()+
  geom_polygon(data = vertex.df, aes(x = x, y = y))+
  geom_point(aes(x = 5, y = 10), color = "red")+
  coord_fixed()

mathiasisaksen/artKIT documentation built on Dec. 21, 2021, 2:52 p.m.