示例#1
0
void DlgExtrusion::getAxisLink(App::PropertyLinkSub& lnk) const
{
    QString text = ui->txtLink->text();

    if (text.length() == 0) {
        lnk.setValue(nullptr);
    } else {
        QStringList parts = text.split(QChar::fromLatin1(':'));
        App::DocumentObject* obj = App::GetApplication().getActiveDocument()->getObject(parts[0].toLatin1());
        if(!obj){
            throw Base::ValueError(tr("Object not found: %1").arg(parts[0]).toUtf8().constData());
        }
        lnk.setValue(obj);
        if (parts.size() == 1) {
            return;
        } else if (parts.size() == 2) {
            std::vector<std::string> subs;
            subs.push_back(std::string(parts[1].toLatin1().constData()));
            lnk.setValue(obj,subs);
        }
    }

}
示例#2
0
bool ProfileBased::checkLineCrossesFace(const gp_Lin &line, const TopoDS_Face &face)
{
#if 1
    BRepBuilderAPI_MakeEdge mkEdge(line);
    TopoDS_Wire wire = ShapeAnalysis::OuterWire(face);
    BRepExtrema_DistShapeShape distss(wire, mkEdge.Shape(), Precision::Confusion());
    if (distss.IsDone()) {
        if (distss.Value() > Precision::Confusion())
            return false;
        // build up map vertex->edge
        TopTools_IndexedDataMapOfShapeListOfShape vertex2Edge;
        TopExp::MapShapesAndAncestors(wire, TopAbs_VERTEX, TopAbs_EDGE, vertex2Edge);

        for (Standard_Integer i=1; i<= distss.NbSolution(); i++) {
            if (distss.PointOnShape1(i).Distance(distss.PointOnShape2(i)) > Precision::Confusion())
                continue;
            BRepExtrema_SupportType type = distss.SupportTypeShape1(i);
            if (type == BRepExtrema_IsOnEdge) {
                TopoDS_Edge edge = TopoDS::Edge(distss.SupportOnShape1(i));
                BRepAdaptor_Curve adapt(edge);
                // create a plane (pnt,dir) that goes through the intersection point and is built of
                // the vectors of the sketch normal and the rotation axis
                const gp_Dir& normal = BRepAdaptor_Surface(face).Plane().Axis().Direction();
                gp_Dir dir = line.Direction().Crossed(normal);
                gp_Pnt pnt = distss.PointOnShape1(i);

                Standard_Real t;
                distss.ParOnEdgeS1(i, t);
                gp_Pnt p_eps1 = adapt.Value(std::max<double>(adapt.FirstParameter(), t-10*Precision::Confusion()));
                gp_Pnt p_eps2 = adapt.Value(std::min<double>(adapt.LastParameter(), t+10*Precision::Confusion()));

                // now check if we get a change in the sign of the distances
                Standard_Real dist_p_eps1_pnt = gp_Vec(p_eps1, pnt).Dot(gp_Vec(dir));
                Standard_Real dist_p_eps2_pnt = gp_Vec(p_eps2, pnt).Dot(gp_Vec(dir));
                // distance to the plane must be noticeable
                if (fabs(dist_p_eps1_pnt) > 5*Precision::Confusion() &&
                    fabs(dist_p_eps2_pnt) > 5*Precision::Confusion()) {
                    if (dist_p_eps1_pnt * dist_p_eps2_pnt < 0)
                        return true;
                }
            }
            else if (type == BRepExtrema_IsVertex) {
                // for a vertex check the two adjacent edges if there is a change of sign
                TopoDS_Vertex vertex = TopoDS::Vertex(distss.SupportOnShape1(i));
                const TopTools_ListOfShape& edges = vertex2Edge.FindFromKey(vertex);
                if (edges.Extent() == 2) {
                    // create a plane (pnt,dir) that goes through the intersection point and is built of
                    // the vectors of the sketch normal and the rotation axis
                    BRepAdaptor_Surface adapt(face);
                    const gp_Dir& normal = adapt.Plane().Axis().Direction();
                    gp_Dir dir = line.Direction().Crossed(normal);
                    gp_Pnt pnt = distss.PointOnShape1(i);

                    // from the first edge get a point next to the intersection point
                    const TopoDS_Edge& edge1 = TopoDS::Edge(edges.First());
                    BRepAdaptor_Curve adapt1(edge1);
                    Standard_Real dist1 = adapt1.Value(adapt1.FirstParameter()).SquareDistance(pnt);
                    Standard_Real dist2 = adapt1.Value(adapt1.LastParameter()).SquareDistance(pnt);
                    gp_Pnt p_eps1;
                    if (dist1 < dist2)
                        p_eps1 = adapt1.Value(adapt1.FirstParameter() + 2*Precision::Confusion());
                    else
                        p_eps1 = adapt1.Value(adapt1.LastParameter() - 2*Precision::Confusion());

                    // from the second edge get a point next to the intersection point
                    const TopoDS_Edge& edge2 = TopoDS::Edge(edges.Last());
                    BRepAdaptor_Curve adapt2(edge2);
                    Standard_Real dist3 = adapt2.Value(adapt2.FirstParameter()).SquareDistance(pnt);
                    Standard_Real dist4 = adapt2.Value(adapt2.LastParameter()).SquareDistance(pnt);
                    gp_Pnt p_eps2;
                    if (dist3 < dist4)
                        p_eps2 = adapt2.Value(adapt2.FirstParameter() + 2*Precision::Confusion());
                    else
                        p_eps2 = adapt2.Value(adapt2.LastParameter() - 2*Precision::Confusion());

                    // now check if we get a change in the sign of the distances
                    Standard_Real dist_p_eps1_pnt = gp_Vec(p_eps1, pnt).Dot(gp_Vec(dir));
                    Standard_Real dist_p_eps2_pnt = gp_Vec(p_eps2, pnt).Dot(gp_Vec(dir));
                    // distance to the plane must be noticeable
                    if (fabs(dist_p_eps1_pnt) > Precision::Confusion() &&
                        fabs(dist_p_eps2_pnt) > Precision::Confusion()) {
                        if (dist_p_eps1_pnt * dist_p_eps2_pnt < 0)
                            return true;
                    }
                }
            }
        }
    }

    return false;
#else
    // This is not as easy as it looks, because a distance of zero might be OK if
    // the axis touches the sketchshape in in a linear edge or a vertex
    // Note: This algorithm does not catch cases where the sketchshape touches the
    // axis in two or more points
    // Note: And it only works on closed outer wires
    TopoDS_Wire outerWire = ShapeAnalysis::OuterWire(face);
    BRepBuilderAPI_MakeEdge mkEdge(line);
    if (!mkEdge.IsDone())
        throw Base::RuntimeError("Revolve: Unexpected OCE failure");
    BRepAdaptor_Curve axis(TopoDS::Edge(mkEdge.Shape()));

    TopExp_Explorer ex;
    int intersections = 0;
    std::vector<gp_Pnt> intersectionpoints;

    // Note: We need to look at every edge separately to catch coincident lines
    for (ex.Init(outerWire, TopAbs_EDGE); ex.More(); ex.Next()) {
        BRepAdaptor_Curve edge(TopoDS::Edge(ex.Current()));
        Extrema_ExtCC intersector(axis, edge);

        if (intersector.IsDone()) {
            for (int i = 1; i <= intersector.NbExt(); i++) {


#if OCC_VERSION_HEX >= 0x060500
                if (intersector.SquareDistance(i) < Precision::Confusion()) {
#else
                if (intersector.Value(i) < Precision::Confusion()) {
#endif
                    if (intersector.IsParallel()) {
                        // A line that is coincident with the axis produces three intersections
                        // 1 with the line itself and 2 with the adjacent edges
                        intersections -= 2;
                    } else {
                        Extrema_POnCurv p1, p2;
                        intersector.Points(i, p1, p2);
                        intersectionpoints.push_back(p1.Value());
                        intersections++;
                    }
                }
            }
        }
    }

    // Note: We might check this inside the loop but then we have to rely on TopExp_Explorer
    // returning the wire's edges in adjacent order (because of the coincident line checking)
    if (intersections > 1) {
        // Check that we don't touch the sketchface just in two identical vertices
        if ((intersectionpoints.size() == 2) &&
            (intersectionpoints[0].IsEqual(intersectionpoints[1], Precision::Confusion())))
            return false;
        else
            return true;
    }

    return false;
#endif
}

void ProfileBased::remapSupportShape(const TopoDS_Shape& newShape)
{
    TopTools_IndexedMapOfShape faceMap;
    TopExp::MapShapes(newShape, TopAbs_FACE, faceMap);

    // here we must reset the placement otherwise the geometric matching doesn't work
    Part::TopoShape shape = this->Shape.getValue();
    TopoDS_Shape sh = shape.getShape();
    sh.Location(TopLoc_Location());
    shape.setShape(sh);

    std::vector<App::DocumentObject*> refs = this->getInList();
    for (std::vector<App::DocumentObject*>::iterator it = refs.begin(); it != refs.end(); ++it) {
        std::vector<App::Property*> props;
        (*it)->getPropertyList(props);
        for (std::vector<App::Property*>::iterator jt = props.begin(); jt != props.end(); ++jt) {
            if (!(*jt)->isDerivedFrom(App::PropertyLinkSub::getClassTypeId()))
                continue;
            App::PropertyLinkSub* link = static_cast<App::PropertyLinkSub*>(*jt);
            if (link->getValue() != this)
                continue;
            std::vector<std::string> subValues = link->getSubValues();
            std::vector<std::string> newSubValues;

            for (std::vector<std::string>::iterator it = subValues.begin(); it != subValues.end(); ++it) {
                std::string shapetype;
                if (it->size() > 4 && it->substr(0,4) == "Face") {
                    shapetype = "Face";
                }
                else if (it->size() > 4 && it->substr(0,4) == "Edge") {
                    shapetype = "Edge";
                }
                else if (it->size() > 6 && it->substr(0,6) == "Vertex") {
                    shapetype = "Vertex";
                }
                else {
                    newSubValues.push_back(*it);
                    continue;
                }

                bool success = false;
                TopoDS_Shape element;
                try {
                    element = shape.getSubShape(it->c_str());
                }
                catch (Standard_Failure&) {
                    // This shape doesn't even exist, so no chance to do some tests
                    newSubValues.push_back(*it);
                    continue;
                }
                try {
                    // as very first test check if old face and new face are parallel planes
                    TopoDS_Shape newElement = Part::TopoShape(newShape).getSubShape(it->c_str());
                    if (isParallelPlane(element, newElement)) {
                        newSubValues.push_back(*it);
                        success = true;
                    }
                }
                catch (Standard_Failure&) {
                }
                // try an exact matching
                if (!success) {
                    for (int i=1; i<faceMap.Extent(); i++) {
                        if (isQuasiEqual(element, faceMap.FindKey(i))) {
                            std::stringstream str;
                            str << shapetype << i;
                            newSubValues.push_back(str.str());
                            success = true;
                            break;
                        }
                    }
                }
                // if an exact matching fails then try to compare only the geometries
                if (!success) {
                    for (int i=1; i<faceMap.Extent(); i++) {
                        if (isEqualGeometry(element, faceMap.FindKey(i))) {
                            std::stringstream str;
                            str << shapetype << i;
                            newSubValues.push_back(str.str());
                            success = true;
                            break;
                        }
                    }
                }

                // the new shape couldn't be found so keep the old sub-name
                if (!success)
                    newSubValues.push_back(*it);
            }

            link->setValue(this, newSubValues);
        }
    }
}