Method getPointsTwoVerts

src/Mod/TechDraw/App/DrawViewDimension.cpp:983–1018

pointPair DrawViewDimension::getPointsTwoVerts(ReferenceVector references)
{
    App::DocumentObject* refObject = references.front().getObject();
    int iSubelement0 = DrawUtil::getIndexFromName(references.at(0).getSubName());
    int iSubelement1 = DrawUtil::getIndexFromName(references.at(1).getSubName());
    if (refObject->isDerivedFrom<TechDraw::DrawViewPart>()
        && !references.at(0).getSubName().empty()) {
        // this is a 2d object (a DVP + subelements)
        TechDraw::VertexPtr v0 = getViewPart()->getProjVertexByIndex(iSubelement0);
        TechDraw::VertexPtr v1 = getViewPart()->getProjVertexByIndex(iSubelement1);
        if (!v0 || !v1) {
            std::stringstream ssMessage;
            ssMessage << getNameInDocument() << " can not find geometry for 2d reference (3)";
            throw Base::RuntimeError(ssMessage.str());
        }

        return {v0->point(), v1->point()};
    }

    // this is a 3d object
    TopoDS_Shape geometry0 = references.at(0).getGeometry();
    TopoDS_Shape geometry1 = references.at(1).getGeometry();
    if (geometry0.IsNull() || geometry1.IsNull() || geometry0.ShapeType() != TopAbs_VERTEX
        || geometry1.ShapeType() != TopAbs_VERTEX) {
        throw Base::RuntimeError("Geometry for dimension reference is null.");
    }
    const TopoDS_Vertex& vertex0 = TopoDS::Vertex(geometry0);
    const TopoDS_Vertex& vertex1 = TopoDS::Vertex(geometry1);
    gp_Pnt gPoint0 = BRep_Tool::Pnt(vertex0);
    gp_Pnt gPoint1 = BRep_Tool::Pnt(vertex1);

    pointPair pts(Base::convertTo<Base::Vector3d>(gPoint0), Base::convertTo<Base::Vector3d>(gPoint1));
    pts.move(getViewPart()->getCurrentCentroid());
    pts.project(getViewPart());
    return pts;
}

pointPair DrawViewDimension::getPointsEdgeVert(ReferenceVector references)
{