puts "============"
puts "CR26975"
puts "============"
puts ""

##########################################################################################
puts "Visualization, TKOpenGl - handle triangle strips correctly within Ray-Tracing core"
##########################################################################################

pload MODELING VISUALIZATION
vclear
vinit View1
vraytrace 0
vdrawparray s trianglestrips v 0 0 0 n 0 0 1 v 0 2 0 n 0 0 1 v 2 0 0 n 0 0 1 v 2 2 0 n 0 0 1
vfit

vdump $imagedir/${casename}_rt_off.png

vraytrace 1

vdump $imagedir/${casename}_rt_on.png

set color  [vreadpixel 250 250 rgb name]
puts $color
if { $color == "BLACK" } {
    puts "ERROR: CR26975 is reproduced. Triangle strips incorrect within Ray-Tracing core."
}