r - 色付きの B スプラインに選択点を追加する

Question

前回の bspline の質問の続き

これが私の曲線の場合:

data <- tibble (
  x = c(10, 15, 17, 17, 20, 22, 22, 23, 25, 25, 27, 29),
  y = c(5, 7, 4, 4, 0, 5, 5, 6, 5, 5, 4, 5.5),
  g = c("A", "A", "A", "B", "B", "B", "C", "C", "C", "D","D","D"),
  pt = c(0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1)
)

ggplot(data) + 
  stat_bspline2(aes(x=x, y=y, color = ..group.., group = g), size = 4, n = 300, geom = "bspline0") +
  scale_color_gradientn(colours = c("red", "pink", "green", "white"), guide = F) 

曲線上の選択したポイントにドットを追加するにはどうすればよいですか?

これを行わない方法は次のとおりです。

ggplot(data) + 
  stat_bspline2(aes(x=x, y=y, color = ..group.., group = g), size = 4, n = 300, geom = "bspline0") +
  scale_color_gradientn(colours = c("red", "pink", "green", "white"), guide = F) +
  stat_bspline2(data = pt, aes(x = x, y = x, color = ..group.., group = pt), n = 12, geom = "point", size = 9)
)