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14b741b0ef
Support of CIE Lab and Lch color spaces is introduced in Quantity_Color: - Enumeration Quantity_TypeOfColor is extended by new values representing CIE Lab and Lch color spaces (with D65 2 deg illuminant). - Conversion of RGB color to and from these color spaces is implemented in Quantity_Color class (within existing API). - Color difference calculation using CIE Delta E 200 formula is implemented in method DeltaE2000(). New methods MakeUniformColors() and SetUniformColors() are added in class AIS_ColorScale, generating and setting color scale based on colors of the same lightness in CIE Lch color model. DRAW commands vcolorconvert and vcolordiff are added to perform conversions and compute difference, respectively. A new option -uniform is added in DRAW command vcolorscale, to set uniform color scale. Added test grid v3d colors (color conversions and difference), test bugs vis bug31454 (uniform color scale)
24 lines
766 B
Plaintext
24 lines
766 B
Plaintext
puts "============"
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puts "0031454: Visualization - perceptually uniform color scale"
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puts "============"
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puts ""
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vclear
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vinit View1 -width 600
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#vsetcolorbg 1 1 1
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vaxo
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set nbcolors 10
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# create default color scale with 20 steps
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vcolorscale hsl -range 0 1 $nbcolors -xy 0 0 -title HSL
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# create color scales with uniform lightness
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vcolorscale lch30 -range 0 1 $nbcolors -xy 100 0 -uniform 30 300 40 -title L=30
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vcolorscale lch40 -range 0 1 $nbcolors -xy 200 0 -uniform 40 300 40 -title L=40
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vcolorscale lch50 -range 0 1 $nbcolors -xy 300 0 -uniform 50 300 40 -title L=50
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vcolorscale lch60 -range 0 1 $nbcolors -xy 400 0 -uniform 60 300 40 -title L=60
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vcolorscale lch70 -range 0 1 $nbcolors -xy 500 0 -uniform 70 300 40 -title L=70
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vdump ${imagedir}/${casename}.png
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