occt/tests/bugs/vis/bug25760_1

puts "============"
puts "CR25760"
puts "============"
puts ""
#######################################################################
# Visualization - precision factor added to ZNear, ZFar in method ZFitAll() of Graphic3d_Camera is not enough
#######################################################################

vinit View1 w=409 h=409
vclear

proc test2d {} {
  set pix1 {135 204}
  set pix2 {204 187}

  for {set i 8} {$i <= 8} {incr i} {
    set min_z [expr pow (-10, $i)]
    set max_z [expr $min_z + 1000]
    plane p1 0 0 $min_z 0 0 1
    plane p2 0 0 $max_z 0 0 1

    mkface f1 p1 -1 0 -1 0
    mkface f2 p2  0 1  0 1

    vclear
    vdisplay f1 f2
    vtop
    vfit

    for {set z [expr $max_z + 1.0]} {$z <= 1e10} {set z [expr abs ($z) * 1.2]} {
      vviewparams -eye 0 0 $z
      vmoveto {*}$pix1
      if { [checkcolor {*}$pix1 0 1 1] != 1 } {
        puts "Error: 2D projection test failed with the following parameters:"
        vviewparams
        vzrange
        puts ""
        puts "z    : $z"
        puts "min_z: $min_z"
        puts "max_z: $max_z"
        return 0
      }
      vmoveto {*}$pix2
      if { [checkcolor {*}$pix2 0 1 1] != 1 } {
        puts "Error: 2D projection test failed with the following parameters:"
        vviewparams
        vzrange
        puts ""
        puts "z    : $z"
        puts "min_z: $min_z"
        puts "max_z: $max_z"
        return 0
      }
    }
  }
  return 1
}

set tcl_precision 16

####################################################################
# Test orthographic camera without frustum culling.                #
####################################################################
vcamera -ortho
vfrustumculling 0

if { [test2d] != 1 } {
  puts "Error: 2D projection test failed: view frustum culling is OFF"
}

####################################################################
# Test orthographic camera with frustum culling.                   #
####################################################################
vcamera -ortho
vfrustumculling 1

if { [test2d] != 1 } {
  puts "Error: 2D projection test failed: view frustum culling is ON"
}