Function Handle

src/ifcgeom/kernels/opencascade/boolean_utils.cpp:385–393

	auto f1 = TopoDS::Face(ortho_faces.FindKey(2));

	const Handle(Geom_Surface)& f0_s = BRep_Tool::Surface(f0);
	const Handle(Geom_Surface)& f1_s = BRep_Tool::Surface(f1);

	auto p0 = Handle(Geom_Plane)::DownCast(f0_s);
	auto p1 = Handle(Geom_Plane)::DownCast(f1_s);

	if (p0.IsNull() || p1.IsNull()) {
		return false;
	}

	auto dot0 = p0->Location().XYZ().Dot(v.XYZ());
	auto dot1 = p1->Location().XYZ().Dot(v.XYZ());