C++ Handle_Geom_Curve::IsKind方法代码示例

PyObject* GeometrySurfacePy::vIso(PyObject * args)
{
    double v;
    if (!PyArg_ParseTuple(args, "d", &v))
        return 0;

    try {
        Handle_Geom_Surface surf = Handle_Geom_Surface::DownCast
            (getGeometryPtr()->handle());
        Handle_Geom_Curve c = surf->VIso(v);
        if (c->IsKind(STANDARD_TYPE(Geom_Line))) {
            Handle_Geom_Line aLine = Handle_Geom_Line::DownCast(c);
            GeomLineSegment* line = new GeomLineSegment();
            Handle_Geom_TrimmedCurve this_curv = Handle_Geom_TrimmedCurve::DownCast
                (line->handle());
            Handle_Geom_Line this_line = Handle_Geom_Line::DownCast
                (this_curv->BasisCurve());
            this_line->SetLin(aLine->Lin());
            return new LinePy(line);
        }
        else {
            return Py::new_reference_to(makeGeometryCurvePy(c));
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }
}

const Py::Object makeGeometryCurvePy(const Handle_Geom_Curve& c)
{
    if (c->IsKind(STANDARD_TYPE(Geom_Circle))) {
        Handle_Geom_Circle circ = Handle_Geom_Circle::DownCast(c);
        return Py::asObject(new CirclePy(new GeomCircle(circ)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_Ellipse))) {
        Handle_Geom_Ellipse ell = Handle_Geom_Ellipse::DownCast(c);
        return Py::asObject(new EllipsePy(new GeomEllipse(ell)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_Hyperbola))) {
        Handle_Geom_Hyperbola hyp = Handle_Geom_Hyperbola::DownCast(c);
        return Py::asObject(new HyperbolaPy(new GeomHyperbola(hyp)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_Line))) {
        Handle_Geom_Line lin = Handle_Geom_Line::DownCast(c);
        return Py::asObject(new GeometryCurvePy(new GeomLine(lin)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_OffsetCurve))) {
        Handle_Geom_OffsetCurve oc = Handle_Geom_OffsetCurve::DownCast(c);
        return Py::asObject(new OffsetCurvePy(new GeomOffsetCurve(oc)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_Parabola))) {
        Handle_Geom_Parabola par = Handle_Geom_Parabola::DownCast(c);
        return Py::asObject(new ParabolaPy(new GeomParabola(par)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))) {
        Handle_Geom_TrimmedCurve trc = Handle_Geom_TrimmedCurve::DownCast(c);
        return Py::asObject(new GeometryCurvePy(new GeomTrimmedCurve(trc)));
    }
    /*else if (c->IsKind(STANDARD_TYPE(Geom_BoundedCurve))) {
        Handle_Geom_BoundedCurve bc = Handle_Geom_BoundedCurve::DownCast(c);
        return Py::asObject(new GeometryCurvePy(new GeomBoundedCurve(bc)));
    }*/
    else if (c->IsKind(STANDARD_TYPE(Geom_BezierCurve))) {
        Handle_Geom_BezierCurve bezier = Handle_Geom_BezierCurve::DownCast(c);
        return Py::asObject(new BezierCurvePy(new GeomBezierCurve(bezier)));
    }
    else if (c->IsKind(STANDARD_TYPE(Geom_BSplineCurve))) {
        Handle_Geom_BSplineCurve bspline = Handle_Geom_BSplineCurve::DownCast(c);
        return Py::asObject(new BSplineCurvePy(new GeomBSplineCurve(bspline)));
    }

    std::string err = "Unhandled curve type ";
    err += c->DynamicType()->Name();
    throw Py::TypeError(err);
}

App::DocumentObjectExecReturn *Draft::execute(void)
{
    // Get parameters
    // Base shape
    Part::TopoShape TopShape;
    try {
        TopShape = getBaseShape();
    } catch (Base::Exception& e) {
        return new App::DocumentObjectExecReturn(e.what());
    }

    // Faces where draft should be applied
    // Note: Cannot be const reference currently because of BRepOffsetAPI_DraftAngle::Remove() bug, see below
    std::vector<std::string> SubVals = Base.getSubValuesStartsWith("Face");
    if (SubVals.size() == 0)
        return new App::DocumentObjectExecReturn("No faces specified");

    // Draft angle
    double angle = Angle.getValue() / 180.0 * M_PI;

    // Pull direction
    gp_Dir pullDirection;
    App::DocumentObject* refDirection = PullDirection.getValue();    
    if (refDirection != NULL) {
        if (refDirection->getTypeId().isDerivedFrom(PartDesign::Line::getClassTypeId())) {
                    PartDesign::Line* line = static_cast<PartDesign::Line*>(refDirection);
                    Base::Vector3d d = line->getDirection();
                    pullDirection = gp_Dir(d.x, d.y, d.z);
        } else if (refDirection->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId())) {
            std::vector<std::string> subStrings = PullDirection.getSubValues();
            if (subStrings.empty() || subStrings[0].empty())
                throw Base::Exception("No pull direction reference specified");

            Part::Feature* refFeature = static_cast<Part::Feature*>(refDirection);
            Part::TopoShape refShape = refFeature->Shape.getShape();
            TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());

            if (ref.ShapeType() == TopAbs_EDGE) {
                TopoDS_Edge refEdge = TopoDS::Edge(ref);
                if (refEdge.IsNull())
                    throw Base::Exception("Failed to extract pull direction reference edge");
                BRepAdaptor_Curve adapt(refEdge);
                if (adapt.GetType() != GeomAbs_Line)
                    throw Base::Exception("Pull direction reference edge must be linear");

                pullDirection = adapt.Line().Direction();
            } else {
                throw Base::Exception("Pull direction reference must be an edge or a datum line");
            }
        } else {
            throw Base::Exception("Pull direction reference must be an edge of a feature or a datum line");
        }

        TopLoc_Location invObjLoc = this->getLocation().Inverted();
        pullDirection.Transform(invObjLoc.Transformation());
    }

    // Neutral plane
    gp_Pln neutralPlane;
    App::DocumentObject* refPlane = NeutralPlane.getValue();
    if (refPlane == NULL) {
        // Try to guess a neutral plane from the first selected face
        // Get edges of first selected face
        TopoDS_Shape face = TopShape.getSubShape(SubVals[0].c_str());
        TopTools_IndexedMapOfShape mapOfEdges;
        TopExp::MapShapes(face, TopAbs_EDGE, mapOfEdges);
        bool found = false;

        for (int i = 1; i <= mapOfEdges.Extent(); i++) {
            // Note: What happens if mapOfEdges(i) is the degenerated edge of a cone?
            // But in that case the draft is not possible anyway!
            BRepAdaptor_Curve c(TopoDS::Edge(mapOfEdges(i)));
            gp_Pnt p1 = c.Value(c.FirstParameter());
            gp_Pnt p2 = c.Value(c.LastParameter());

            if (c.IsClosed()) {
                // Edge is a circle or a circular arc (other types are not allowed for drafting)
                neutralPlane = gp_Pln(p1, c.Circle().Axis().Direction());
                found = true;
                break;
            } else {
                // Edge is linear
                // Find midpoint of edge and create auxiliary plane through midpoint normal to edge
                gp_Pnt pm = c.Value((c.FirstParameter() + c.LastParameter()) / 2.0);
                Handle_Geom_Plane aux = new Geom_Plane(pm, gp_Dir(p2.X() - p1.X(), p2.Y() - p1.Y(), p2.Z() - p1.Z()));
                // Intersect plane with face. Is there no easier way?
                BRepAdaptor_Surface adapt(TopoDS::Face(face), Standard_False);
                Handle_Geom_Surface sf = adapt.Surface().Surface();
                GeomAPI_IntSS intersector(aux, sf, Precision::Confusion());
                if (!intersector.IsDone())
                    continue;
                Handle_Geom_Curve icurve = intersector.Line(1);
                if (!icurve->IsKind(STANDARD_TYPE(Geom_Line)))
                    continue;
                // TODO: How to extract the line from icurve without creating an edge first?
                TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(icurve);
                BRepAdaptor_Curve c(edge);
                neutralPlane = gp_Pln(pm, c.Line().Direction());
                found = true;
                break;
//.........这里部分代码省略.........