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