# Check stability of conversion of RGB colors to CIE Lab and Lch
# color spaces and back on random colors

# check color diff on random colors
for {set i 1} {$i < 1000} {incr i} {
  set rgb "[expr rand()] [expr rand()] [expr rand()]"

  set lab [vcolorconvert to lab {*}$rgb]
  set lch [vcolorconvert to lch {*}$rgb]

  set rgb_lab [vcolorconvert from lab {*}$lab]
  set rgb_lch [vcolorconvert from lch {*}$lch]

  check3reals "RGB ($rgb) to Lab and back" {*}$rgb_lab {*}$rgb 1e-4
  check3reals "RGB ($rgb) to Lch and back" {*}$rgb_lch {*}$rgb 1e-4
}