canvas_planet {aRtsy}

Draw Planets

Description

This function paints one or multiple planets and uses a cellular automata to fill their surfaces.

Usage

canvas_planet(
  colors,
  threshold = 4,
  iterations = 200,
  starprob = 0.01,
  fade = 0.2,
  radius = NULL,
  center.x = NULL,
  center.y = NULL,
  light.right = TRUE,
  resolution = 1500
)

Arguments

colors

a character specifying the colors used for a single planet. Can also be a list where each entry is a vector of colors for a planet.

threshold

a character specifying the threshold for a color take.

iterations

a positive integer specifying the number of iterations of the algorithm.

starprob

a value specifying the probability of drawing a star in outer space.

fade

a value specifying the amount of fading to apply.

radius

a numeric (vector) specifying the radius of the planet(s).

center.x

the x-axis coordinate(s) for the center(s) of the planet(s).

center.y

the y-axis coordinate(s) for the center(s) of the planet(s).

light.right

whether to draw the light from the right or the left.

resolution

resolution of the artwork in pixels per row/column. Increasing the resolution increases the quality of the artwork but also increases the computation time exponentially.

Value

A ggplot object containing the artwork.

Author(s)

Koen Derks, [e-mail]

References

https://fronkonstin.com/2021/01/02/neighborhoods-experimenting-with-cyclic-cellular-automata/

Examples

set.seed(1)

# Simple example
canvas_planet(colors = colorPalette("lava"), threshold = 3)

# Advanced example
colors <- list(
  c("khaki1", "lightcoral", "lightsalmon"),
  c("dodgerblue", "forestgreen", "white"),
  c("gray", "darkgray", "beige")
)
canvas_planet(colors,
  radius = c(800, 400, 150),
  center.x = c(1, 500, 1100),
  center.y = c(1400, 500, 1000),
  starprob = 0.005
)