def set_parallel_mode(flag):
"""
Global option to set the Boolean operations for parallel execution.
:param bool flag: Option for parallel execution. *True* turns parallel
execution on, *False* turns it off.
:return: None.
"""
BOPAlgo_Options.SetParallelMode_(flag)
import time
from OCCT.BOPAlgo import BOPAlgo_Options
from OCCT.BRepAlgoAPI import BRepAlgoAPI_Fuse
from OCCT.TopTools import TopTools_ListOfShape
from OCCT.Exchange import ExchangeBasic
from OCCT.Visualization import BasicViewer
fn = './models/wing_assy.brep'
wing_assy = ExchangeBasic.read_brep(fn)
fn = './models/fuse_assy.brep'
fuse_assy = ExchangeBasic.read_brep(fn)
BOPAlgo_Options.SetParallelMode_(True)
bop = BRepAlgoAPI_Fuse()
args = TopTools_ListOfShape()
args.Append(wing_assy)
bop.SetArguments(args)
tools = TopTools_ListOfShape()
tools.Append(fuse_assy)
bop.SetTools(tools)
print('Starting fuse...')
start = time.time()
bop.Build()
print('Complete in ', time.time() - start, ' seconds.')
v = BasicViewer()
v.add(bop.Shape())
v.start()