C++ Handle_Geom_Curve::IsNull方法代码示例

PyObject* GeometryCurvePy::toShape(PyObject *args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            double u,v;
            u=c->FirstParameter();
            v=c->LastParameter();
            if (!PyArg_ParseTuple(args, "|dd", &u,&v))
                return 0;
            BRepBuilderAPI_MakeEdge mkBuilder(c, u, v);
            TopoDS_Shape sh = mkBuilder.Shape();
            return new TopoShapeEdgePy(new TopoShape(sh));
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

// constructor method
int SurfaceOfExtrusionPy::PyInit(PyObject* args, PyObject* /*kwd*/)
{
    PyObject* pGeom;
    PyObject* pDir;
    if (!PyArg_ParseTuple(args, "O!O!", 
                            &(GeometryPy::Type), &pGeom, 
                            &(Base::VectorPy::Type),&pDir))
        return -1;

    GeometryPy* pcGeo = static_cast<GeometryPy*>(pGeom);
    Handle_Geom_Curve curve = Handle_Geom_Curve::DownCast
        (pcGeo->getGeometryPtr()->handle());
    if (curve.IsNull()) {
        PyErr_SetString(PyExc_TypeError, "geometry is not a curve");
        return -1;
    }

    try {
        Base::Vector3d dir = static_cast<Base::VectorPy*>(pDir)->value();
        Handle_Geom_SurfaceOfLinearExtrusion curve2 = new Geom_SurfaceOfLinearExtrusion(curve,
            gp_Dir(dir.x,dir.y,dir.z));
        getGeomSurfaceOfExtrusionPtr()->setHandle(curve2);
        return 0;
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return -1;
    }
}

PyObject* GeometryCurvePy::parameter(PyObject *args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            PyObject *p;
            if (!PyArg_ParseTuple(args, "O!", &(Base::VectorPy::Type), &p))
                return 0;
            Base::Vector3d v = Py::Vector(p, false).toVector();
            gp_Pnt pnt(v.x,v.y,v.z);
            GeomAPI_ProjectPointOnCurve ppc(pnt, c);
            double val = ppc.LowerDistanceParameter();
            return Py::new_reference_to(Py::Float(val));
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

PyObject* GeometryCurvePy::intersect(PyObject *args)
{
    Handle_Geom_Curve curve = Handle_Geom_Curve::DownCast(getGeometryPtr()->handle());
    try {
        if (!curve.IsNull()) {
            PyObject *p;
            double prec = Precision::Confusion();
            try {
                if (PyArg_ParseTuple(args, "O!|d", &(Part::GeometryCurvePy::Type), &p, &prec))
                    return intersectCC(args);
            } catch(...) {}
            PyErr_Clear();

            if (PyArg_ParseTuple(args, "O!|d", &(Part::GeometrySurfacePy::Type), &p, &prec))
                return intersectCS(args);
            else
                return 0;
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PyExc_Exception, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PyExc_Exception, "Geometry is not a curve");
    return 0;
}

PyObject* GeometryCurvePy::toBSpline(PyObject * args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            double u,v;
            u=c->FirstParameter();
            v=c->LastParameter();
            if (!PyArg_ParseTuple(args, "|dd", &u,&v))
                return 0;
            ShapeConstruct_Curve scc;
            Handle_Geom_BSplineCurve spline = scc.ConvertToBSpline(c, u, v, Precision::Confusion());
            if (spline.IsNull())
                Standard_NullValue::Raise("Conversion to B-Spline failed");
            return new BSplineCurvePy(new GeomBSplineCurve(spline));
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

PyObject* GeometryCurvePy::length(PyObject *args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            double u=c->FirstParameter();
            double v=c->LastParameter();
            double t=Precision::Confusion();
            if (!PyArg_ParseTuple(args, "|ddd", &u,&v,&t))
                return 0;
            GeomAdaptor_Curve adapt(c);
            double len = GCPnts_AbscissaPoint::Length(adapt,u,v,t);
            return PyFloat_FromDouble(len);
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

PyObject* GeometryCurvePy::tangent(PyObject *args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            double u;
            if (!PyArg_ParseTuple(args, "d", &u))
                return 0;
            gp_Dir dir;
            Py::Tuple tuple(1);
            GeomLProp_CLProps prop(c,u,1,Precision::Confusion());
            if (prop.IsTangentDefined()) {
                prop.Tangent(dir);
                tuple.setItem(0, Py::Vector(Base::Vector3d(dir.X(),dir.Y(),dir.Z())));
            }

            return Py::new_reference_to(tuple);
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

PyObject* GeometryCurvePy::parameterAtDistance(PyObject *args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            double abscissa;
            double u = 0;
            if (!PyArg_ParseTuple(args, "d|d", &abscissa,&u))
                return 0;
            GeomAdaptor_Curve adapt(c);
            GCPnts_AbscissaPoint abscissaPoint(adapt,abscissa,u);
            double parm = abscissaPoint.Parameter();
            return PyFloat_FromDouble(parm);
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

int convert_to_ifc(const TopoDS_Wire& wire, IfcSchema::IfcLoop*& loop, bool advanced) {
	bool polygonal = true;
	for (TopExp_Explorer exp(wire, TopAbs_EDGE); exp.More(); exp.Next()) {
		double a, b;
		Handle_Geom_Curve crv = BRep_Tool::Curve(TopoDS::Edge(exp.Current()), a, b);
		if (crv.IsNull()) {
			continue;
		}
		if (crv->DynamicType() != STANDARD_TYPE(Geom_Line)) {
			polygonal = false;
			break;
		}
	}
	if (!polygonal && !advanced) {
		return 0;
	} else if (polygonal && !advanced) {
		IfcSchema::IfcCartesianPoint::list::ptr points(new IfcSchema::IfcCartesianPoint::list);
		BRepTools_WireExplorer exp(wire);
		IfcSchema::IfcCartesianPoint* p;
		for (; exp.More(); exp.Next()) {
			if (convert_to_ifc(exp.CurrentVertex(), p, advanced)) {
				points->push(p);
			} else {
				return 0;
			}
		}
		loop = new IfcSchema::IfcPolyLoop(points);
		return 1;
	} else {
		IfcSchema::IfcOrientedEdge::list::ptr edges(new IfcSchema::IfcOrientedEdge::list);
		BRepTools_WireExplorer exp(wire);
		for (; exp.More(); exp.Next()) {
			IfcSchema::IfcEdge* edge;
			// With advanced set to true convert_to_ifc(TopoDS_Edge&) will always create an IfcOrientedEdge
			if (!convert_to_ifc(exp.Current(), edge, true)) {
				double a, b;
				if (BRep_Tool::Curve(TopoDS::Edge(exp.Current()), a, b).IsNull()) {
					continue;
				} else {
					return 0;
				}
			}
			edges->push(edge->as<IfcSchema::IfcOrientedEdge>());
		}
		loop = new IfcSchema::IfcEdgeLoop(edges);
		return 1;
	}
}

PyObject* GeometryCurvePy::intersectCS(PyObject *args)
{
    Handle_Geom_Curve curve = Handle_Geom_Curve::DownCast(getGeometryPtr()->handle());
    try {
        if (!curve.IsNull()) {
            PyObject *p;
            double prec = Precision::Confusion();
            if (!PyArg_ParseTuple(args, "O!|d", &(Part::GeometrySurfacePy::Type), &p, &prec))
                return 0;
            Handle_Geom_Surface surf = Handle_Geom_Surface::DownCast(static_cast<GeometryPy*>(p)->getGeometryPtr()->handle());
            GeomAPI_IntCS intersector(curve, surf);
            if (!intersector.IsDone()) {
                PyErr_SetString(PyExc_Exception, "Intersection of curve and surface failed");
                return 0;
            }

            Py::List points;
            for (int i = 1; i <= intersector.NbPoints(); i++) {
                gp_Pnt p = intersector.Point(i);
                points.append(Py::Object(new PointPy(new GeomPoint(Base::Vector3d(p.X(), p.Y(), p.Z())))));
            }
            Py::List segments;
            for (int i = 1; i <= intersector.NbSegments(); i++) {
                Handle_Geom_Curve seg = intersector.Segment(i);
                segments.append(makeGeometryCurvePy(seg));
            }

            Py::Tuple tuple(2);
            tuple.setItem(0, points);
            tuple.setItem(1, segments);
            return Py::new_reference_to(tuple);
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PyExc_Exception, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PyExc_Exception, "Geometry is not a curve");
    return 0;
}

void  SurfaceOfExtrusionPy::setBasisCurve(Py::Object arg)
{
    PyObject* p = arg.ptr();
    if (PyObject_TypeCheck(p, &(GeometryPy::Type))) {
        GeometryPy* pcGeo = static_cast<GeometryPy*>(p);
        Handle_Geom_Curve curve = Handle_Geom_Curve::DownCast
            (pcGeo->getGeometryPtr()->handle());
        if (curve.IsNull()) {
            throw Py::TypeError("geometry is not a curve");
        }

        try {
            Handle_Geom_SurfaceOfLinearExtrusion curve2 = Handle_Geom_SurfaceOfLinearExtrusion::DownCast
                (getGeometryPtr()->handle());
            curve2->SetBasisCurve(curve);
        }
        catch (Standard_Failure) {
            Handle_Standard_Failure e = Standard_Failure::Caught();
            throw Py::Exception(e->GetMessageString());
        }
    }
}

PyObject* GeometryCurvePy::value(PyObject *args)
{
    Handle_Geom_Geometry g = getGeometryPtr()->handle();
    Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
    try {
        if (!c.IsNull()) {
            double u;
            if (!PyArg_ParseTuple(args, "d", &u))
                return 0;
            gp_Pnt p = c->Value(u);
            return new Base::VectorPy(Base::Vector3d(p.X(),p.Y(),p.Z()));
        }
    }
    catch (Standard_Failure) {
        Handle_Standard_Failure e = Standard_Failure::Caught();
        PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
        return 0;
    }

    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
    return 0;
}

// constructor method
int TopoShapeEdgePy::PyInit(PyObject* args, PyObject* /*kwd*/)
{
    PyObject *pcObj, *pcObj2;
    double first=DBL_MAX, last=DBL_MAX;
    if (PyArg_ParseTuple(args, "O!|dd", &(Part::GeometryPy::Type), &pcObj, &first, &last)) {
        Geometry* geom = static_cast<GeometryPy*>(pcObj)->getGeometryPtr();
        Handle_Geom_Curve curve = Handle_Geom_Curve::DownCast(geom->handle());
        if (curve.IsNull()) {
            PyErr_SetString(PyExc_Exception, "geometry is not a curve type");
            return -1;
        }

        if (first==DBL_MAX)
            first = curve->FirstParameter();
        if (last==DBL_MAX)
            last = curve->LastParameter();

        try {
            BRepBuilderAPI_MakeEdge mkEdge(curve, first, last);
            getTopoShapePtr()->_Shape = mkEdge.Edge();
            return 0;
        }
        catch (Standard_Failure) {
            Handle_Standard_Failure e = Standard_Failure::Caught();
            PyErr_SetString(PyExc_Exception, e->GetMessageString());
            return -1;
        }
    }

    PyErr_Clear();
    if (PyArg_ParseTuple(args, "O!", &(Part::TopoShapePy::Type), &pcObj)) {
        TopoShape* shape = static_cast<TopoShapePy*>(pcObj)->getTopoShapePtr();
        if (shape && !shape->_Shape.IsNull() && shape->_Shape.ShapeType() == TopAbs_EDGE) {
            this->getTopoShapePtr()->_Shape = shape->_Shape;
            return 0;
        }
        else {
            PyErr_SetString(PyExc_TypeError, "Shape is not an edge");
            return -1;
        }
    }

    PyErr_Clear();
    if (PyArg_ParseTuple(args, "O!O!", &(Part::TopoShapeVertexPy::Type), &pcObj,
                                       &(Part::TopoShapeVertexPy::Type), &pcObj2)) {
        TopoShape* shape1 = static_cast<TopoShapePy*>(pcObj)->getTopoShapePtr();
        TopoShape* shape2 = static_cast<TopoShapePy*>(pcObj2)->getTopoShapePtr();
        const TopoDS_Vertex& v1 = TopoDS::Vertex(shape1->_Shape);
        const TopoDS_Vertex& v2 = TopoDS::Vertex(shape2->_Shape);

        try {
            BRepBuilderAPI_MakeEdge mkEdge(v1, v2);
            getTopoShapePtr()->_Shape = mkEdge.Edge();
            return 0;
        }
        catch (Standard_Failure) {
            Handle_Standard_Failure e = Standard_Failure::Caught();
            PyErr_SetString(PyExc_Exception, e->GetMessageString());
            return -1;
        }
    }

    PyErr_SetString(PyExc_Exception, "Curve or shape expected");
    return -1;
}

PyObject* GeometryCurvePy::discretize(PyObject *args, PyObject *kwds)
{
    try {
        Handle_Geom_Geometry g = getGeometryPtr()->handle();
        Handle_Geom_Curve c = Handle_Geom_Curve::DownCast(g);
        if (c.IsNull()) {
            PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
            return 0;
        }

        GeomAdaptor_Curve adapt(c);
        bool uniformAbscissaPoints = false;
        bool uniformAbscissaDistance = false;
        int numPoints = -1;
        double distance = -1;
        double first = adapt.FirstParameter();
        double last = adapt.LastParameter();

        // use no kwds
        PyObject* dist_or_num;
        if (PyArg_ParseTuple(args, "O", &dist_or_num)) {
            if (PyInt_Check(dist_or_num)) {
                numPoints = PyInt_AsLong(dist_or_num);
                uniformAbscissaPoints = true;
            }
            else if (PyFloat_Check(dist_or_num)) {
                distance = PyFloat_AsDouble(dist_or_num);
                uniformAbscissaDistance = true;
            }
            else {
                PyErr_SetString(PyExc_TypeError, "Either int or float expected");
                return 0;
            }
        }
        else {
            // use Number kwds
            static char* kwds_numPoints[] = {"Number","First","Last",NULL};
            PyErr_Clear();
            if (PyArg_ParseTupleAndKeywords(args, kwds, "i|dd", kwds_numPoints, &numPoints, &first, &last)) {
                uniformAbscissaPoints = true;
            }
            else {
                // use Abscissa kwds
                static char* kwds_Distance[] = {"Distance","First","Last",NULL};
                PyErr_Clear();
                if (PyArg_ParseTupleAndKeywords(args, kwds, "d|dd", kwds_Distance, &distance, &first, &last)) {
                    uniformAbscissaDistance = true;
                }
            }
        }

        if (uniformAbscissaPoints || uniformAbscissaDistance) {
            GCPnts_UniformAbscissa discretizer;
            if (uniformAbscissaPoints)
                discretizer.Initialize (adapt, numPoints, first, last);
            else
                discretizer.Initialize (adapt, distance, first, last);

            if (discretizer.IsDone () && discretizer.NbPoints () > 0) {
                Py::List points;
                int nbPoints = discretizer.NbPoints ();
                for (int i=1; i<=nbPoints; i++) {
                    gp_Pnt p = adapt.Value (discretizer.Parameter (i));
                    points.append(Py::Vector(Base::Vector3d(p.X(),p.Y(),p.Z())));
                }

                return Py::new_reference_to(points);
            }
            else {
                PyErr_SetString(PartExceptionOCCError, "Discretization of curve failed");
                return 0;
            }
        }

        // use Deflection kwds
        static char* kwds_Deflection[] = {"Deflection","First","Last",NULL};
        PyErr_Clear();
        double deflection;
        if (PyArg_ParseTupleAndKeywords(args, kwds, "d|dd", kwds_Deflection, &deflection, &first, &last)) {
            GCPnts_UniformDeflection discretizer(adapt, deflection, first, last);
            if (discretizer.IsDone () && discretizer.NbPoints () > 0) {
                Py::List points;
                int nbPoints = discretizer.NbPoints ();
                for (int i=1; i<=nbPoints; i++) {
                    gp_Pnt p = discretizer.Value (i);
                    points.append(Py::Vector(Base::Vector3d(p.X(),p.Y(),p.Z())));
                }

                return Py::new_reference_to(points);
            }
            else {
                PyErr_SetString(PartExceptionOCCError, "Discretization of curve failed");
                return 0;
            }
        }

        // use TangentialDeflection kwds
        static char* kwds_TangentialDeflection[] = {"Angular","Curvature","First","Last","Minimum",NULL};
        PyErr_Clear();
        double angular;
//.........这里部分代码省略.........