puts "========"
puts "OCC349"
puts "1. Hidden line removal algorithm works incorrect in the perspective view"
puts "========"

vinit
box b 100 900 300
set 3dviewer 1
vdisplay b

OCC280 1 0

vfit

set x1 135
set y1 119

set x2 387
set y2 33

set x3 172
set y3 144

set x4 28
set y4 190

set x5 160
set y5 257

set x6 365
set y6 150

set x7 212
set y7 272

set x8 60
set y8 343

set x9 26
set y9 255

set x10 353
set y10 99

set x11 389
set y11 113

set x12 60
set y12 276

#
#              ___________2________________
#             /|                          /|
#            / |                         / |
#           /  |                        /  |
#          /   |                       /   |
#         /    |                      /    |
#        1     |                     3     |
#       /      |                    /      |
#      /       |                   /       |
#     /        |                  /        |
#    /         |                 /         |
#   ----------------4------------          |
#   |          |                |          |
#   |          |                |          |
#   |          |                |          |
#   |         10                |         11
#   |          |                |          |
#   |          |                |          |
#   |          |                |          |
#   |          |                |          |
#   |          |                |          |
#   9          |               12          |
#   |          |___________6____|__________|
#   |         /                 |         /
#   |        /                  |        /
#   |       /                   |       /
#   |      /                    |      /
#   |     5                     |     /
#   |    /                      |    7
#   |   /                       |   /
#   |  /                        |  /
#   | /                         | /
#   |/                          |/
#   |--------------8------------|
#
#

checkcolor ${x1} ${y1} 1 1 0
checkcolor ${x2} ${y2} 1 1 0
checkcolor ${x3} ${y3} 1 1 0
checkcolor ${x4} ${y4} 1 1 0
checkcolor ${x7} ${y7} 1 1 0
checkcolor ${x8} ${y8} 1 1 0
checkcolor ${x9} ${y9} 1 1 0
checkcolor ${x11} ${y11} 1 1 0
checkcolor ${x12} ${y12} 1 1 0
checkcolor ${x5} ${y5} 0 0 0
checkcolor ${x6} ${y6} 0 0 0
checkcolor ${x10} ${y10} 0 0 0

set only_screen 1