def common_parts(array, shells):
from OCC.Core.BRepAlgoAPI import BRepAlgoAPI_Common
from OCC.Extend.TopologyUtils import TopologyExplorer
d = {}
for i, si in enumerate(array):
for k in si.dico:
named_shell = si.dico[k]
for j, s in enumerate(shells):
com = BRepAlgoAPI_Common(named_shell.Shape(), s)
n_common_faces = TopologyExplorer(
com.Shape()).number_of_faces()
if n_common_faces > 0:
d[k] = com.Shape()
break
return d
def from_boolean_intersection(cls, A: 'BRep', B: 'BRep') -> 'BRep':
"""Construct a BRep from the boolean intersection of two other BReps.
Parameters
----------
A : :class:`~compas_occ.brep.BRep`
B : :class:`~compas_occ.brep.BRep`
Returns
-------
:class:`~compas_occ.brep.BRep`
"""
common = BRepAlgoAPI_Common(A.shape, B.shape)
if not common.IsDone():
raise Exception(
"Boolean intersection operation could not be completed.")
brep = BRep()
brep.shape = common.Shape()
return brep
def combine_faces(face1, face2, height_mm):
assert isinstance(face1, TopoDS_Face)
assert isinstance(face2, TopoDS_Face)
face1_ = copy.deepcopy(face1)
face2_ = copy.deepcopy(face2)
# assuming both faces start in the XZ plane
tf = gp_Trsf()
# rotate from the XZ plane to the YZ plane
tf.SetRotation(gp_Ax1(ORIGIN, DIR_Z), math.pi / 2)
face2_ = BRepBuilderAPI_Transform(face2_, tf).Shape()
# We assume characters are no wider than they are tall, but just in case
# we extrude by twice the height to make sure to capture all features
face1_extruded = make_extrusion(face1_, 2 * height_mm, gp_Vec(0, 1, 0))
face2_extruded = make_extrusion(face2_, 2 * height_mm, gp_Vec(1, 0, 0))
common = BRepAlgoAPI_Common(face1_extruded, face2_extruded)
result = common.Shape()
assert isinstance(result, TopoDS_Compound)
return copy.deepcopy(result)
def occ_pair_intersect(a, b):
algo = BRepAlgoAPI_Common(a, b)
algo.Build()
if not algo.IsDone():
raise Exception("warn: intersect algotithm failed\n")
return algo.Shape()