puts "============"
puts "0025544: Visualization, TKOpenGl - support grayscale textures"
puts "============"
puts ""

vinit View1
vclear

box b 1 2 3
vaxo
vsetdispmode 1
vdisplay b
vtexture b 1 -modulate on
vfit

set aColorMod [vreadpixel 290 180 rgb name]
vdump $imagedir/${casename}_modulated.png

vtexture b 1 -modulate off
set aColorDec [vreadpixel 290 180 rgb name]
vdump $imagedir/${casename}_decal.png

if {"$aColorMod" != "GOLDENROD4"} {
  puts "Error: wrong color with modulation ON"
}
if {"$aColorDec" != "GRAY80"} {
  puts "Error: wrong color with modulation OFF"
}