Labelled contour lines

[AllanCameron]

One of the things I had hoped this package would handle would be labelled contour lines, where there are breaks in the lines for the labels. This is something that comes up now and again on SO, and none of the existing solutions seem that great.

I was about to explore how we might implement this, when I realized that...we already have:

library(geomtextpath)
#> Loading required package: ggplot2

set.seed(1)

df  <- data.frame(x = rnorm(100), y = rnorm(100))

ggplot(df, aes(x, y)) + 
  stat_density2d(geom = "textpath", aes(label = after_stat(level))) +
  theme_classic()

I think we want to include an example like this in our readme and gallery, but the issue is: is this useful enough to warrant its own geom? It would be very little work to create since it's essentially already implemented.

^{Created on 2021-12-07 by the reprex package (v2.0.0)}