map_colors: map_colors

In glow: Make Plots that Glow

map_colors

Description

A helper function for manually mapping colors to a vector of colors.

Usage

map_colors(colors, x, min_limit=NULL, max_limit=NULL)

Arguments

colors	A vector of colors
x	A numeric vector of data
min_limit	The minimum value to scale the color to. Must be outside the range of data. If NULL, the minimum is determined by the data.
max_limit	The maximum value to scale the color to. Must be outside the range of data. If NULL, the maximum is determined by the data.

Details

A helper function for manually mapping colors to a vector of colors. It is useful when you want to manually specify color data, rather than relying on ggplot functions.

Value

A vector of colors.

Examples

cliff_points <- clifford_attractor(1e4, 1.886,-2.357,-0.328, 0.918, 0.1, 0)
color_pal <- circular_palette(n=144, pal_function=rainbow)
cliff_points$color <- map_colors(color_pal, cliff_points$angle, min_limit=-pi, max_limit=pi)

gm <- GlowMapper4$new(xdim=240, ydim=240, blend_mode = "additive", nthreads=1)
gm$map(x=cliff_points$x, y=cliff_points$y, radius=0.1, color=cliff_points$color)
pd <- gm$output_dataframe(saturation = 1)

ggplot() +
  geom_raster(data = pd, aes(x = x, y = y, fill = rgb(r,g,b,a)), show.legend=FALSE) +
  coord_fixed(gm$aspect(), xlim = gm$xlim(), ylim = gm$ylim()) + 
  scale_fill_identity() + 
  theme_night()

glow documentation built on April 6, 2023, 1:08 a.m.