CAD 部品情報の抽出、BOM 整理と図面の一括出力

def walk(label: TDF_Label, location: TopLoc_Location, depth: int) -> Occurrence:
    node = Occurrence(definition(label), location, depth)
    if XCAFDoc_ShapeTool.IsAssembly_s(label):
        components = TDF_LabelSequence()
        XCAFDoc_ShapeTool.GetComponents_s(label, components, False)
        for i in range(1, components.Length() + 1):
            component = components.Value(i)
            referred = TDF_Label()
            XCAFDoc_ShapeTool.GetReferredShape_s(component, referred)
            placement = location.Multiplied(XCAFDoc_ShapeTool.GetLocation_s(component))
            node.children.append(walk(referred, placement, depth + 1))
    return node

def check_part_number(raw: str | None, name: str, pattern: str) -> Checked:
    if raw is None:
        return Checked("", [Issue("PN_AMBIGUOUS", "", name, {})])
    regex = re.compile(pattern)
    if regex.fullmatch(raw):
        return Checked(raw, [])
    fixed = normalize_part_number(raw)
    if regex.fullmatch(fixed):
        return Checked(fixed, [Issue("PN_NORMALIZED", fixed, name, {"raw": raw, "fixed": fixed})])
    return Checked(raw, [Issue("PN_FORMAT", raw, name, {"raw": raw, "pattern": pattern})])

def project(shape: TopoDS_Shape, view: str, deflection: float = 0.02, hidden: bool = True) -> Projection:
    direction, x_dir = VIEWS[view]
    algo = HLRBRep_Algo()
    algo.Add(shape)
    algo.Projector(HLRAlgo_Projector(gp_Ax2(gp_Pnt(0, 0, 0), gp_Dir(*direction), gp_Dir(*x_dir))))
    algo.Update()
    algo.Hide()
    result = HLRBRep_HLRToShape(algo)
    visible = _polylines(result.VCompound(), deflection) + _polylines(result.OutLineVCompound(), deflection)
    hidden_lines = []
    if hidden:
        hidden_lines = _polylines(result.HCompound(), deflection) + _polylines(
            result.OutLineHCompound(), deflection)
    return Projection(visible, hidden_lines)