Convert to LUV matrix from HCL data frame

It is thought to specify a colorpath using HCL coordinates; it seems reasonable to compile these coordinates using a data frame.

as_mat_luv(df_hcl, chroma_min = 0.01)

Arguments

df_hcl

data.frame with variables h, c, l.

chroma_min

numeric minimum value for chroma, helps preserve hue.

Value

matrix with columns, l, u, v and same number of rows as df_hcl

Examples

  as_mat_luv(df_hcl_blues)
#>       l             u             v
#> [1,] 30  -0.003424503 -9.393376e-03
#> [2,] 60 -51.303007837 -1.409539e+02
#> [3,] 90  -0.003433110 -9.386274e-03