puts "========"
puts "0025822: Visualization, TKOpenGl - front material should be used instead of back material within distinguish mode turned off"
puts "========"

pload MODELING OCAF XDE
box b 10 10 10
vclear
vclose all
catch { Close D }
NewDocument D BinXCAF
XAddShape D b
XSetColor D b 0 0 1
explode b f
XSetColor D b_1 1 0 0

XShow D
vviewparams -proj 1 0.1 0.1
vfit
vsetdispmode 1

catch { vclipplane delete pln }
vclipplane create pln
vclipplane set pln view Driver1/Document_D/View1
vclipplane change pln equation -1 0 0 5

# FFP on, pixel is RED3, which is expected
vcaps -ffp 1
set aColorFfp [vreadpixel 200 200 rgb name]
if { "$aColorFfp" != "RED3" } {
  puts "Error: RED3 color is expected at the back side (FFP)"
}

# GLSL on, pixel should has the same color RED3, but actual color is KHAKI1
vcaps -ffp 0
set aColorGlsl [vreadpixel 200 200 rgb name]
if { "$aColorGlsl" != "RED3" } {
  puts "Error: RED3 color is expected at the back side (GLSL)"
}