puts "========"
puts "OCC27856"
puts "========"
puts ""
#################################################
# Regression vs 6.7.1: General Fuse operation fails to fuse the solids
#################################################

# Before the fix, EMPTY result (no points, no curves)
# was returned in every considered case.

restore [locate_data_file bug27856_int_solids.brep] b

explode b so

# first pair of solids
explode b_1 f
explode b_2 f

# ----

regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_1_2 b_2_2 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 0.00026943844817627679 0.0 1.0e-3

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_1_4 b_2_4 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 6.5039065434503992e-005 0.0 1.0e-2

# ----

# second pair of solids

explode b_3 f
explode b_4 f

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_3_2 b_4_2 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 0.00030603795647549098 0.0 1.0e-3

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_3_4 b_4_4 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 0.00029242900088525842 0.0 1.0e-3

# ----

# third pair of solids

explode b_5 f
explode b_6 f

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_5_2 b_6_2 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 2.0312181042800029e-005 0.0 1.0e-2

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_5_4 b_6_4 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 0.00023415774730871651 0.0 1.0e-3

# ----

# fourth pair of solids

explode b_7 f
explode b_8 f

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_7_2 b_8_2 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 0.00028209392756607551 0.0 1.0e-3

# ----

set Toler 0.0
set NbCurv 0
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} [bopcurves b_7_4 b_8_4 -2d] full Toler NbCurv
if {${NbCurv} != 1} {
  puts "Error: Number of curves is bad!"
}
checkreal TolReached $Toler 2.497244318171703e-005 0.0 1.0e-2