def _bounding_box(self, obj, tol=1e-5):
bbox = Bnd_Box()
if self.optimal:
BRepTools.Clean_s(obj)
BRepBndLib.AddOptimal_s(obj, bbox)
else:
BRepBndLib.Add_s(obj, bbox)
values = bbox.Get()
return (values[0], values[3], values[1], values[4], values[2], values[5])
def _bounding_box(self, obj, tol=1e-6):
bbox = Bnd_Box()
if self.optimal:
BRepTools.Clean_s(obj)
BRepBndLib.AddOptimal_s(obj, bbox)
else:
BRepBndLib.Add_s(obj, bbox)
if not bbox.IsVoid():
values = bbox.Get()
return (values[0], values[3], values[1], values[4], values[2],
values[5])
else:
c = self._center_of_mass(obj)
bb = (c[0] - tol, c[0] + tol, c[1] - tol, c[1] + tol, c[2] - tol,
c[2] + tol)
print("\nVoid Bounding Box", bb)
return bb
def add(
self,
obj: Union[Tuple[float, float, float], Vector, "BoundBox"],
tol: float = 1e-8,
) -> "BoundBox":
"""Returns a modified (expanded) bounding box
obj can be one of several things:
1. a 3-tuple corresponding to x,y, and z amounts to add
2. a vector, containing the x,y,z values to add
3. another bounding box, where a new box will be created that
encloses both.
This bounding box is not changed.
"""
tmp = Bnd_Box()
tmp.SetGap(tol)
tmp.Add(self.wrapped)
if isinstance(obj, tuple):
tmp.Update(*obj)
elif isinstance(obj, Vector):
tmp.Update(*obj.toTuple())
elif isinstance(obj, BoundBox):
tmp.Add(obj.wrapped)
return BoundBox(tmp)
def __init__(self, bb: Bnd_Box) -> None:
self.wrapped = bb
XMin, YMin, ZMin, XMax, YMax, ZMax = bb.Get()
self.xmin = XMin
self.xmax = XMax
self.xlen = XMax - XMin
self.ymin = YMin
self.ymax = YMax
self.ylen = YMax - YMin
self.zmin = ZMin
self.zmax = ZMax
self.zlen = ZMax - ZMin
self.center = Vector((XMax + XMin) / 2, (YMax + YMin) / 2,
(ZMax + ZMin) / 2)
self.DiagonalLength = self.wrapped.SquareExtent()**0.5
def _fromTopoDS(
cls: Type["BoundBox"],
shape: TopoDS_Shape,
tol: Optional[float] = None,
optimal: bool = True,
):
"""
Constructs a bounding box from a TopoDS_Shape
"""
tol = TOL if tol is None else tol # tol = TOL (by default)
bbox = Bnd_Box()
if optimal:
BRepBndLib.AddOptimal_s(
shape, bbox
) # this is 'exact' but expensive - not yet wrapped by PythonOCC
else:
mesh = BRepMesh_IncrementalMesh(shape, tol, True)
mesh.Perform()
# this is adds +margin but is faster
BRepBndLib.Add_s(shape, bbox, True)
return cls(bbox)
def _bounding_box(self, obj, tol=1e-5):
bbox = Bnd_Box()
BRepBndLib.AddOptimal_s(obj, bbox)
values = bbox.Get()
return (values[0], values[3], values[1], values[4], values[2],
values[5])