C++ base::Rotation类代码示例

PyObject* RotationPy::isNull(PyObject *args)
{
    if (!PyArg_ParseTuple(args, ""))
        return NULL;
    Base::Rotation rot = * getRotationPtr();
    Base::Rotation nullrot(0,0,0,1);
    bool null = rot.isSame(nullrot);
    return Py_BuildValue("O", (null ? Py_True : Py_False));
}

gp_Pln Feature::makePlnFromPlane(const App::DocumentObject* obj)
{
    const App::GeoFeature* plane = static_cast<const App::GeoFeature*>(obj);
    if (plane == NULL)
        throw Base::Exception("Feature: Null object");

    Base::Vector3d pos = plane->Placement.getValue().getPosition();
    Base::Rotation rot = plane->Placement.getValue().getRotation();
    Base::Vector3d normal(0,0,1);
    rot.multVec(normal, normal);
    return gp_Pln(gp_Pnt(pos.x,pos.y,pos.z), gp_Dir(normal.x,normal.y,normal.z));
}

void TaskDatumParameters::updateSuperplacementUI()
{
    Part::Datum* pcDatum = static_cast<Part::Datum*>(DatumView->getObject());
    Base::Placement pl = pcDatum->superPlacement.getValue();
    Base::Vector3d pos = pl.getPosition();
    Base::Rotation rot = pl.getRotation();
    double yaw, pitch, roll;
    rot.getYawPitchRoll(yaw, pitch, roll);

    bool bBlock = true;
    ui->superplacementX->blockSignals(bBlock);
    ui->superplacementY->blockSignals(bBlock);
    ui->superplacementZ->blockSignals(bBlock);
    ui->superplacementYaw->blockSignals(bBlock);
    ui->superplacementPitch->blockSignals(bBlock);
    ui->superplacementRoll->blockSignals(bBlock);

    ui->superplacementX->setValue(Base::Quantity(pos.x,Base::Unit::Length));
    ui->superplacementY->setValue(Base::Quantity(pos.y,Base::Unit::Length));
    ui->superplacementZ->setValue(Base::Quantity(pos.z,Base::Unit::Length));
    ui->superplacementYaw->setValue(yaw);
    ui->superplacementPitch->setValue(pitch);
    ui->superplacementRoll->setValue(roll);

    auto expressions = pcDatum->ExpressionEngine.getExpressions();
    bool bRotationBound = false;
    bRotationBound = bRotationBound ||
            expressions.find(App::ObjectIdentifier::parse(pcDatum,std::string("superPlacement.Rotation.Angle"))) != expressions.end();
    bRotationBound = bRotationBound ||
            expressions.find(App::ObjectIdentifier::parse(pcDatum,std::string("superPlacement.Rotation.Axis.x"))) != expressions.end();
    bRotationBound = bRotationBound ||
            expressions.find(App::ObjectIdentifier::parse(pcDatum,std::string("superPlacement.Rotation.Axis.y"))) != expressions.end();
    bRotationBound = bRotationBound ||
            expressions.find(App::ObjectIdentifier::parse(pcDatum,std::string("superPlacement.Rotation.Axis.z"))) != expressions.end();

    ui->superplacementYaw->setEnabled(!bRotationBound);
    ui->superplacementPitch->setEnabled(!bRotationBound);
    ui->superplacementRoll->setEnabled(!bRotationBound);

    QString tooltip = bRotationBound ? tr("Not editable because rotation part of superplacement is bound by expressions.") : QString();
    ui->superplacementYaw->setToolTip(tooltip);
    ui->superplacementPitch->setToolTip(tooltip);
    ui->superplacementRoll->setToolTip(tooltip);

    bBlock = false;
    ui->superplacementX->blockSignals(bBlock);
    ui->superplacementY->blockSignals(bBlock);
    ui->superplacementZ->blockSignals(bBlock);
    ui->superplacementYaw->blockSignals(bBlock);
    ui->superplacementPitch->blockSignals(bBlock);
    ui->superplacementRoll->blockSignals(bBlock);
}

// constructor method
int RotationPy::PyInit(PyObject* args, PyObject* /*kwd*/)
{
    PyObject* o;
    if (PyArg_ParseTuple(args, "")) {
        return 0;
    }

    PyErr_Clear();
    if (PyArg_ParseTuple(args, "O!", &(Base::RotationPy::Type), &o)) {
        Base::Rotation *rot = static_cast<Base::RotationPy*>(o)->getRotationPtr();
        getRotationPtr()->setValue(rot->getValue());
        return 0;
    }

    PyErr_Clear();
    double angle;
    if (PyArg_ParseTuple(args, "O!d", &(Base::VectorPy::Type), &o, &angle)) {
        // NOTE: The last parameter defines the rotation angle in degree.
        getRotationPtr()->setValue(static_cast<Base::VectorPy*>(o)->value(), Base::toRadians<double>(angle));
        return 0;
    }

    PyErr_Clear();
    double q0, q1, q2, q3;
    if (PyArg_ParseTuple(args, "dddd", &q0, &q1, &q2, &q3)) {
        getRotationPtr()->setValue(q0, q1, q2, q3);
        return 0;
    }

    PyErr_Clear();
    double y, p, r;
    if (PyArg_ParseTuple(args, "ddd", &y, &p, &r)) {
        getRotationPtr()->setYawPitchRoll(y, p, r);
        return 0;
    }

    PyErr_Clear();
    PyObject *v1, *v2;
    if (PyArg_ParseTuple(args, "O!O!", &(Base::VectorPy::Type), &v1,
                                       &(Base::VectorPy::Type), &v2)) {
        Py::Vector from(v1, false);
        Py::Vector to(v2, false);
        getRotationPtr()->setValue(from.toVector(), to.toVector());
        return 0;
    }

    PyErr_SetString(PyExc_Exception, "empty parameter list, four floats or Vector and float");
    return -1;
}

void TaskDatumParameters::onSuperplacementChanged(double /*val*/, int idx)
{
    Part::Datum* pcDatum = static_cast<Part::Datum*>(DatumView->getObject());
    Base::Placement pl = pcDatum->superPlacement.getValue();

    Base::Vector3d pos = pl.getPosition();
    if (idx == 0) {
        pos.x = ui->superplacementX->value().getValueAs(Base::Quantity::MilliMetre);
    }
    if (idx == 1) {
        pos.y = ui->superplacementY->value().getValueAs(Base::Quantity::MilliMetre);
    }
    if (idx == 2) {
        pos.z = ui->superplacementZ->value().getValueAs(Base::Quantity::MilliMetre);
    }
    if (idx >= 0  && idx <= 2){
        pl.setPosition(pos);
    }

    Base::Rotation rot = pl.getRotation();
    double yaw, pitch, roll;
    rot.getYawPitchRoll(yaw, pitch, roll);
    if (idx == 3) {
        yaw = ui->superplacementYaw->value().getValueAs(Base::Quantity::Degree);
    }
    if (idx == 4) {
        pitch = ui->superplacementPitch->value().getValueAs(Base::Quantity::Degree);
    }
    if (idx == 5) {
        roll = ui->superplacementRoll->value().getValueAs(Base::Quantity::Degree);
    }
    if (idx >= 3  &&  idx <= 5){
        rot.setYawPitchRoll(yaw,pitch,roll);
        pl.setRotation(rot);
    }

    pcDatum->superPlacement.setValue(pl);
    updatePreview();
}

Base::Placement Transform::getPlacementData() const
{
    int index = ui->rotationInput->currentIndex();
    Base::Rotation rot;
    Base::Vector3d pos;
    Base::Vector3d cnt;

    pos = Base::Vector3d(ui->xPos->value().getValue(),ui->yPos->value().getValue(),ui->zPos->value().getValue());
    cnt = Base::Vector3d(ui->xCnt->value().getValue(),ui->yCnt->value().getValue(),ui->zCnt->value().getValue());

    if (index == 0) {
        Base::Vector3d dir = getDirection();
        rot.setValue(Base::Vector3d(dir.x,dir.y,dir.z),ui->angle->value().getValue()*D_PI/180.0);
    }
    else if (index == 1) {
        rot.setYawPitchRoll(
            ui->yawAngle->value().getValue(),
            ui->pitchAngle->value().getValue(),
            ui->rollAngle->value().getValue());
    }

    Base::Placement p(pos, rot, cnt);
    return p;
}

bool Revolution::suggestReversed(void)
{
    try {
        updateAxis();

        Part::Part2DObject* sketch = getVerifiedSketch();
        std::vector<TopoDS_Wire> wires = getSketchWires();
        TopoDS_Shape sketchshape = makeFace(wires);

        Base::Vector3d b = Base.getValue();
        Base::Vector3d v = Axis.getValue();

        // get centre of gravity of the sketch face
        GProp_GProps props;
        BRepGProp::SurfaceProperties(sketchshape, props);
        gp_Pnt cog = props.CentreOfMass();
        Base::Vector3d p_cog(cog.X(), cog.Y(), cog.Z());
        // get direction to cog from its projection on the revolve axis
        Base::Vector3d perp_dir = p_cog - p_cog.Perpendicular(b, v);
        // get cross product of projection direction with revolve axis direction
        Base::Vector3d cross = v % perp_dir;
        // get sketch vector pointing away from support material
        Base::Placement SketchPos = sketch->Placement.getValue();
        Base::Rotation SketchOrientation = SketchPos.getRotation();
        Base::Vector3d SketchNormal(0,0,1);
        SketchOrientation.multVec(SketchNormal,SketchNormal);
        // simply convert double to float
        Base::Vector3d norm(SketchNormal.x, SketchNormal.y, SketchNormal.z);

        // return true if the angle between norm and cross is obtuse
        return norm * cross < 0.f;
    }
    catch (...) {
        return Reversed.getValue();
    }
}

void ComplexGeoData::applyRotation(const Base::Rotation& rot)
{
    Base::Matrix4D mat;
    rot.getValue(mat);
    setTransform(mat * getTransform());
}

App::DocumentObjectExecReturn *Pad::execute(void)
{
    // Validate parameters
    double L = Length.getValue();
    if ((std::string(Type.getValueAsString()) == "Length") && (L < Precision::Confusion()))
        return new App::DocumentObjectExecReturn("Length of pad too small");
    double L2 = Length2.getValue();
    if ((std::string(Type.getValueAsString()) == "TwoLengths") && (L < Precision::Confusion()))
        return new App::DocumentObjectExecReturn("Second length of pad too small");

    Part::Part2DObject* sketch = 0;
    std::vector<TopoDS_Wire> wires;
    try {
        sketch = getVerifiedSketch();
        wires = getSketchWires();
    } catch (const Base::Exception& e) {
        return new App::DocumentObjectExecReturn(e.what());
    }

    TopoDS_Shape support;
    try {
        support = getSupportShape();
    } catch (const Base::Exception&) {
        // ignore, because support isn't mandatory
        support = TopoDS_Shape();
    }

    // get the Sketch plane
    Base::Placement SketchPos = sketch->Placement.getValue();
    Base::Rotation SketchOrientation = SketchPos.getRotation();
    Base::Vector3d SketchVector(0,0,1);
    SketchOrientation.multVec(SketchVector,SketchVector);

    this->positionBySketch();
    TopLoc_Location invObjLoc = this->getLocation().Inverted();

    try {
        support.Move(invObjLoc);

        gp_Dir dir(SketchVector.x,SketchVector.y,SketchVector.z);
        dir.Transform(invObjLoc.Transformation());

        TopoDS_Shape sketchshape = makeFace(wires);
        if (sketchshape.IsNull())
            return new App::DocumentObjectExecReturn("Pad: Creating a face from sketch failed");
        sketchshape.Move(invObjLoc);

        TopoDS_Shape prism;
        std::string method(Type.getValueAsString());
        if (method == "UpToFirst" || method == "UpToLast" || method == "UpToFace") {
            TopoDS_Face supportface = getSupportFace();
            supportface.Move(invObjLoc);

            if (Reversed.getValue())
                dir.Reverse();

            // Find a valid face to extrude up to
            TopoDS_Face upToFace;
            if (method == "UpToFace") {
                getUpToFaceFromLinkSub(upToFace, UpToFace);
                upToFace.Move(invObjLoc);
            }
            getUpToFace(upToFace, support, supportface, sketchshape, method, dir);

            // A support object is always required and we need to use BRepFeat_MakePrism
            // Problem: For Pocket/UpToFirst (or an equivalent Pocket/UpToFace) the resulting shape is invalid
            // because the feature does not add any material. This only happens with the "2" option, though
            // Note: It might be possible to pass a shell or a compound containing multiple faces
            // as the Until parameter of Perform()
            BRepFeat_MakePrism PrismMaker;
            PrismMaker.Init(support, sketchshape, supportface, dir, 2, 1);
            PrismMaker.Perform(upToFace);

            if (!PrismMaker.IsDone())
                return new App::DocumentObjectExecReturn("Pad: Up to face: Could not extrude the sketch!");
            prism = PrismMaker.Shape();
        } else {
            generatePrism(prism, sketchshape, method, dir, L, L2,
                          Midplane.getValue(), Reversed.getValue());
        }

        if (prism.IsNull())
            return new App::DocumentObjectExecReturn("Pad: Resulting shape is empty");

        // set the additive shape property for later usage in e.g. pattern
        this->AddShape.setValue(prism);

        // if the sketch has a support fuse them to get one result object
        if (!support.IsNull()) {
            // Let's call algorithm computing a fuse operation:
            BRepAlgoAPI_Fuse mkFuse(support, prism);
            // Let's check if the fusion has been successful
            if (!mkFuse.IsDone())
                return new App::DocumentObjectExecReturn("Pad: Fusion with support failed");
            TopoDS_Shape result = mkFuse.Shape();
            // we have to get the solids (fuse sometimes creates compounds)
            TopoDS_Shape solRes = this->getSolid(result);
            // lets check if the result is a solid
            if (solRes.IsNull())
                return new App::DocumentObjectExecReturn("Pad: Resulting shape is not a solid");
//.........这里部分代码省略.........

// constructor method
int RotationPy::PyInit(PyObject* args, PyObject* /*kwd*/)
{
    PyObject* o;
    if (PyArg_ParseTuple(args, "")) {
        return 0;
    }

    PyErr_Clear();
    if (PyArg_ParseTuple(args, "O!", &(Base::RotationPy::Type), &o)) {
        Base::Rotation *rot = static_cast<Base::RotationPy*>(o)->getRotationPtr();
        getRotationPtr()->setValue(rot->getValue());
        return 0;
    }

    PyErr_Clear();
    double angle;
    if (PyArg_ParseTuple(args, "O!d", &(Base::VectorPy::Type), &o, &angle)) {
      // NOTE: The last parameter defines the rotation angle in degree.
      getRotationPtr()->setValue(static_cast<Base::VectorPy*>(o)->value(), Base::toRadians<double>(angle));
      return 0;
    }

    PyErr_Clear();
    if (PyArg_ParseTuple(args, "O!d", &(Base::MatrixPy::Type), &o, &angle)) {
      // NOTE: The last parameter defines the rotation angle in degree.
      getRotationPtr()->setValue(static_cast<Base::MatrixPy*>(o)->value());
      return 0;
    }

    PyErr_Clear();
    double q0, q1, q2, q3;
    if (PyArg_ParseTuple(args, "dddd", &q0, &q1, &q2, &q3)) {
        getRotationPtr()->setValue(q0, q1, q2, q3);
        return 0;
    }

    PyErr_Clear();
    double y, p, r;
    if (PyArg_ParseTuple(args, "ddd", &y, &p, &r)) {
        getRotationPtr()->setYawPitchRoll(y, p, r);
        return 0;
    }

    double a11 = 1.0, a12 = 0.0, a13 = 0.0, a14 = 0.0;
    double a21 = 0.0, a22 = 1.0, a23 = 0.0, a24 = 0.0;
    double a31 = 0.0, a32 = 0.0, a33 = 1.0, a34 = 0.0;
    double a41 = 0.0, a42 = 0.0, a43 = 0.0, a44 = 1.0;

    // try read a 4x4 matrix
    PyErr_Clear();
    if (PyArg_ParseTuple(args, "dddddddddddddddd",
      &a11, &a12, &a13, &a14,
      &a21, &a22, &a23, &a24,
      &a31, &a32, &a33, &a34,
      &a41, &a42, &a43, &a44))
    {
      Matrix4D mtx(a11, a12, a13, a14,
        a21, a22, a23, a24,
        a31, a32, a33, a34,
        a41, a42, a43, a44);
      getRotationPtr()->setValue(mtx);
      return 0;
    }

    // try read a 3x3 matrix
    PyErr_Clear();
    if (PyArg_ParseTuple(args, "ddddddddd",
      &a11, &a12, &a13,
      &a21, &a22, &a23,
      &a31, &a32, &a33))
    {
      Matrix4D mtx(a11, a12, a13, a14,
        a21, a22, a23, a24,
        a31, a32, a33, a34,
        a41, a42, a43, a44);
      getRotationPtr()->setValue(mtx);
      return 0;
    }


    PyErr_Clear();
    PyObject *v1, *v2;
    if (PyArg_ParseTuple(args, "O!O!", &(Base::VectorPy::Type), &v1,
                                       &(Base::VectorPy::Type), &v2)) {
        Py::Vector from(v1, false);
        Py::Vector to(v2, false);
        getRotationPtr()->setValue(from.toVector(), to.toVector());
        return 0;
    }

    PyErr_Clear();
    PyObject *v3;
    char *priority = nullptr;
    if (PyArg_ParseTuple(args, "O!O!O!|s", &(Base::VectorPy::Type), &v1,
                                       &(Base::VectorPy::Type), &v2,
                                       &(Base::VectorPy::Type), &v3,
                                       &priority                         )) {
        Py::Vector xdir(v1, false);
        Py::Vector ydir(v2, false);
//.........这里部分代码省略.........

App::DocumentObjectExecReturn *Pocket::execute(void)
{
    // Handle legacy features, these typically have Type set to 3 (previously NULL, now UpToFace),
    // empty FaceName (because it didn't exist) and a value for Length
    if (std::string(Type.getValueAsString()) == "UpToFace" &&
        (UpToFace.getValue() == NULL && Length.getValue() > Precision::Confusion()))
        Type.setValue("Length");

    // Validate parameters
    double L = Length.getValue();
    if ((std::string(Type.getValueAsString()) == "Length") && (L < Precision::Confusion()))
        return new App::DocumentObjectExecReturn("Pocket: Length of pocket too small");

    Part::Part2DObject* sketch = 0;
    std::vector<TopoDS_Wire> wires;
    TopoDS_Shape support;
    try {
        sketch = getVerifiedSketch();
        wires = getSketchWires();
        support = getSupportShape();
    } catch (const Base::Exception& e) {
        return new App::DocumentObjectExecReturn(e.what());
    }

    // get the Sketch plane
    Base::Placement SketchPos = sketch->Placement.getValue();
    Base::Rotation SketchOrientation = SketchPos.getRotation();
    Base::Vector3d SketchVector(0,0,1);
    SketchOrientation.multVec(SketchVector,SketchVector);

    // turn around for pockets
    SketchVector *= -1;

    this->positionBySketch();
    TopLoc_Location invObjLoc = this->getLocation().Inverted();

    try {
        support.Move(invObjLoc);

        gp_Dir dir(SketchVector.x,SketchVector.y,SketchVector.z);
        dir.Transform(invObjLoc.Transformation());

        TopoDS_Shape sketchshape = makeFace(wires);
        if (sketchshape.IsNull())
            return new App::DocumentObjectExecReturn("Pocket: Creating a face from sketch failed");
        sketchshape.Move(invObjLoc);

        std::string method(Type.getValueAsString());
        if (method == "UpToFirst" || method == "UpToFace") {
            TopoDS_Face supportface = getSupportFace();
            supportface.Move(invObjLoc);

            // Find a valid face to extrude up to
            TopoDS_Face upToFace;
            if (method == "UpToFace") {
                getUpToFaceFromLinkSub(upToFace, UpToFace);
                upToFace.Move(invObjLoc);
            }
            getUpToFace(upToFace, support, supportface, sketchshape, method, dir);

            // Special treatment because often the created stand-alone prism is invalid (empty) because
            // BRepFeat_MakePrism(..., 2, 1) is buggy
            BRepFeat_MakePrism PrismMaker;
            PrismMaker.Init(support, sketchshape, supportface, dir, 0, 1);
            PrismMaker.Perform(upToFace);

            if (!PrismMaker.IsDone())
                return new App::DocumentObjectExecReturn("Pocket: Up to face: Could not extrude the sketch!");
            TopoDS_Shape prism = PrismMaker.Shape();
            prism = refineShapeIfActive(prism);

            // And the really expensive way to get the SubShape...
            BRepAlgoAPI_Cut mkCut(support, prism);
            if (!mkCut.IsDone())
                return new App::DocumentObjectExecReturn("Pocket: Up to face: Could not get SubShape!");
            // FIXME: In some cases this affects the Shape property: It is set to the same shape as the SubShape!!!!
            TopoDS_Shape result = refineShapeIfActive(mkCut.Shape());
            this->SubShape.setValue(result);
            this->Shape.setValue(prism);
        } else {
            TopoDS_Shape prism;
            generatePrism(prism, sketchshape, method, dir, L, 0.0,
                          Midplane.getValue(), Reversed.getValue());
            if (prism.IsNull())
                return new App::DocumentObjectExecReturn("Pocket: Resulting shape is empty");

            // set the subtractive shape property for later usage in e.g. pattern
            prism = refineShapeIfActive(prism);
            this->SubShape.setValue(prism);

            // Cut the SubShape out of the support
            BRepAlgoAPI_Cut mkCut(support, prism);
            if (!mkCut.IsDone())
                return new App::DocumentObjectExecReturn("Pocket: Cut out of support failed");
            TopoDS_Shape result = mkCut.Shape();
            // we have to get the solids (fuse sometimes creates compounds)
            TopoDS_Shape solRes = this->getSolid(result);
            if (solRes.IsNull())
                return new App::DocumentObjectExecReturn("Pocket: Resulting shape is not a solid");
            solRes = refineShapeIfActive(solRes);
//.........这里部分代码省略.........

const std::list<gp_Trsf> LinearPattern::getTransformations(const std::vector<App::DocumentObject*>)
{
    double distance = Length.getValue();
    if (distance < Precision::Confusion())
        throw Base::Exception("Pattern length too small");
    int occurrences = Occurrences.getValue();
    if (occurrences < 2)
        throw Base::Exception("At least two occurrences required");
    bool reversed = Reversed.getValue();

    double offset = distance / (occurrences - 1);

    App::DocumentObject* refObject = Direction.getValue();
    if (refObject == NULL)
        throw Base::Exception("No direction reference specified");

    std::vector<std::string> subStrings = Direction.getSubValues();
    if (subStrings.empty())
        throw Base::Exception("No direction reference specified");

    gp_Dir dir;
    if (refObject->getTypeId().isDerivedFrom(Part::Part2DObject::getClassTypeId())) {
        Part::Part2DObject* refSketch = static_cast<Part::Part2DObject*>(refObject);
        Base::Axis axis;
        if (subStrings[0] == "H_Axis")
            axis = refSketch->getAxis(Part::Part2DObject::H_Axis);
        else if (subStrings[0] == "V_Axis")
            axis = refSketch->getAxis(Part::Part2DObject::V_Axis);
        else if (subStrings[0] == "N_Axis")
            axis = refSketch->getAxis(Part::Part2DObject::N_Axis);
        else if (subStrings[0].size() > 4 && subStrings[0].substr(0,4) == "Axis") {
            int AxId = std::atoi(subStrings[0].substr(4,4000).c_str());
            if (AxId >= 0 && AxId < refSketch->getAxisCount())
                axis = refSketch->getAxis(AxId);
        }
        axis *= refSketch->Placement.getValue();
        dir = gp_Dir(axis.getDirection().x, axis.getDirection().y, axis.getDirection().z);
    } else if (refObject->getTypeId().isDerivedFrom(PartDesign::Plane::getClassTypeId())) {
        PartDesign::Plane* plane = static_cast<PartDesign::Plane*>(refObject);
        Base::Vector3d d = plane->getNormal();
        dir = gp_Dir(d.x, d.y, d.z);
    } else if (refObject->getTypeId().isDerivedFrom(PartDesign::Line::getClassTypeId())) {
        PartDesign::Line* line = static_cast<PartDesign::Line*>(refObject);
        Base::Vector3d d = line->getDirection();
        dir = gp_Dir(d.x, d.y, d.z);
    } else if (refObject->getTypeId().isDerivedFrom(App::Line::getClassTypeId())) {
        App::Line* line = static_cast<App::Line*>(refObject);
        Base::Rotation rot = line->Placement.getValue().getRotation();
        Base::Vector3d d(1,0,0);
        rot.multVec(d, d);
        dir = gp_Dir(d.x, d.y, d.z);
    } else if (refObject->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
        if (subStrings[0].empty())
            throw Base::Exception("No direction reference specified");
        Part::Feature* refFeature = static_cast<Part::Feature*>(refObject);
        Part::TopoShape refShape = refFeature->Shape.getShape();
        TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());

        if (ref.ShapeType() == TopAbs_FACE) {
            TopoDS_Face refFace = TopoDS::Face(ref);
            if (refFace.IsNull())
                throw Base::Exception("Failed to extract direction plane");
            BRepAdaptor_Surface adapt(refFace);
            if (adapt.GetType() != GeomAbs_Plane)
                throw Base::Exception("Direction face must be planar");

            dir = adapt.Plane().Axis().Direction();
        } else if (ref.ShapeType() == TopAbs_EDGE) {
            TopoDS_Edge refEdge = TopoDS::Edge(ref);
            if (refEdge.IsNull())
                throw Base::Exception("Failed to extract direction edge");
            BRepAdaptor_Curve adapt(refEdge);
            if (adapt.GetType() != GeomAbs_Line)
                throw Base::Exception("Direction edge must be a straight line");

            dir = adapt.Line().Direction();
        } else {
            throw Base::Exception("Direction reference must be edge or face");
        }
    } else {
        throw Base::Exception("Direction reference must be edge/face of a feature or a datum line/plane");
    }
    TopLoc_Location invObjLoc = this->getLocation().Inverted();
    dir.Transform(invObjLoc.Transformation());

    gp_Vec direction(dir.X(), dir.Y(), dir.Z());

    if (reversed)
        direction.Reverse();

    // Note: The original feature is NOT included in the list of transformations! Therefore
    // we start with occurrence number 1, not number 0
    std::list<gp_Trsf> transformations;
    gp_Trsf trans;
    transformations.push_back(trans); // identity transformation

    for (int i = 1; i < occurrences; i++) {
        trans.SetTranslation(direction * i * offset);
        transformations.push_back(trans);
    }
//.........这里部分代码省略.........