Create LUV palette-function using Bézier spline

Source: R/pal_luv_bezier.R

This takes a matrix of LUV control-points and returns a palette-function (that returns LUV values) based on a Bézier spline using those control-points.

pal_luv_bezier(mat_luv, rescale_path = TRUE, n = 21)

Arguments

mat_luv

matrix of LUV coordinates, control-points for Bézier spline.

rescale_path

logical indicating to rescale the palette function to be perceptually-uniform with respect to the input.

n

numeric if rescale_path, number of equally-spaced Bézier points to calculate.

Value

A function with S3 class cpath_palette.

Details

The default is to rescale the palette function so that it is perceptually uniform (in LUV space) using 21 points from the spline.

Examples

 # create palette-function
 pb <- pal_luv_bezier(mat_luv_blues)

 # evaluate
 pb(c(0, 0.5, 1))
#>             l             u             v
#> [1,] 30.00000  -0.003424503  -0.009393376
#> [2,] 60.01002 -25.653215465 -70.481635374
#> [3,] 90.00000  -0.003433110  -0.009386274