puts "============"
puts "0031454: Visualization - perceptually uniform color scale"
puts "============"
puts ""

vclear
vinit View1 -width 600
#vsetcolorbg 1 1 1
vaxo

set nbcolors 10

# create default color scale with 20 steps
vcolorscale hsl -range 0 1 $nbcolors -xy 0 0 -title HSL

# create color scales with uniform lightness
vcolorscale lch30 -range 0 1 $nbcolors -xy 100 0 -uniform 30 300 40 -title L=30
vcolorscale lch40 -range 0 1 $nbcolors -xy 200 0 -uniform 40 300 40 -title L=40
vcolorscale lch50 -range 0 1 $nbcolors -xy 300 0 -uniform 50 300 40 -title L=50
vcolorscale lch60 -range 0 1 $nbcolors -xy 400 0 -uniform 60 300 40 -title L=60
vcolorscale lch70 -range 0 1 $nbcolors -xy 500 0 -uniform 70 300 40 -title L=70

vdump ${imagedir}/${casename}.png