In djnavarro/jasmines: Generative Art

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
  out.width = "100%"
)

jasmines

The jasmines package is what I use to make a lot of my generative artwork with R. Internally it relies heavily on the ambient package, and you may need to install the developer version of ambient to make it work:

# install.packages("remotes")
# remotes::install_github("thomasp85/ambient")
remotes::install_github("djnavarro/jasmines")

Functions in the jasmines package are designed to work with the dplyr pipe, so you will likely want to have dplyr loaded:

library(dplyr)
library(jasmines)

Example 1

A typical jasmines pipeline looks like this:

use_seed(1) %>%
  entity_circle(grain = 1000) %>%
  unfold_tempest(iterations = 10) %>%
  style_ribbon(background = "wheat")

The use_seed() function is a convenience function that sets the random number generator seed, and stores that value for later use. The seed is then piped to an entity_ function (or a scene_ function) that creates the initial object that will be operated upon. In this case this initial object is a circle of diameter 2 rendered using 1000 points. This is then passed to an unfold_ function, that iteratively applies some operation (in this case the "warp") operation for some number of steps (in this case 100). The object is converted to a ggplot2 image using one of the style_ functions. In this and most cases the style_ribbon() is used and has several customisable finctions.

Example 2

use_seed(1) %>%
  entity_circle(grain = 1000, size = 2) %>%
  unfold_warp(iterations = 100) %>%
  style_ribbon(palette = "rainbow")

Example 3

An example where the initial object is created with entity_heart(), the unfolding performed by unfold_slice() and the styling is more elaborate.

use_seed(1) %>%
  entity_heart(grain = 1000) %>%
  unfold_slice(iterations = 10) %>%
  style_ribbon(
    palette = "base", 
    colour = "ind", 
    background = "mistyrose"
  ) %>%
  style_overlay(border = "white")

Example 4

It is possible to create "scenes" comprised of multiple entities as the initial starting point, apply multiple unfolding operations, and modify the way transparency and colouring is done.

use_seed(1) %>%
  scene_discs(
    rings = 3, points = 5000, size = 5
  ) %>%
  mutate(ind = 1:n()) %>%
  unfold_warp(
    iterations = 1,
    scale = .5, 
    output = "layer" 
  ) %>%
  unfold_tempest(
    iterations = 20,
    scale = .01
  ) %>%
  style_ribbon(
    palette = palette_named("vik"),
    colour = "ind",
    alpha = c(.1,.1),
    background = "oldlace"
  )