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puts "========"
puts "Per-pixel lighting using GLSL program (Phong shading)"
puts "========"
pload MODELING VISUALIZATION
# create box
box b 1 2 3
# draw box
vclear
vclose ALL
vinit View1
vsetdispmode 1
vaxo
vdisplay b
vfit
vrotate 0.2 0.0 0.0
# take snapshot with fixed pipeline
vdump $::imagedir/${::casename}_OFF.png
vshaderprog b phong
vdump $::imagedir/${::casename}_ph1.png
vclear
vdisplay b
vshaderprog b phong
vdump $::imagedir/${::casename}_ph2.png
vmoveto 250 250
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