remove obsolete 3D reference code

This commit is contained in:
WandererFan
2016-04-22 13:37:53 -04:00
committed by wmayer
parent 621d570026
commit a3592a201c
10 changed files with 2 additions and 449 deletions

View File

@@ -281,142 +281,16 @@ const std::vector<TechDrawGeometry::Vertex *> & DrawViewPart::getVertexGeometry(
return geometryObject->getVertexGeometry();
}
const std::vector<int> & DrawViewPart::getVertexReferences() const
{
return geometryObject->getVertexRefs();
}
const std::vector<TechDrawGeometry::Face *> & DrawViewPart::getFaceGeometry() const
{
return geometryObject->getFaceGeometry();
}
const std::vector<int> & DrawViewPart::getFaceReferences() const
{
return geometryObject->getFaceRefs();
}
const std::vector<TechDrawGeometry::BaseGeom *> & DrawViewPart::getEdgeGeometry() const
{
return geometryObject->getEdgeGeometry();
}
const std::vector<int> & DrawViewPart::getEdgeReferences() const
{
return geometryObject->getEdgeRefs();
}
//! project Source Edge(idx) to 2D BaseGeom
TechDrawGeometry::BaseGeom *DrawViewPart::getCompleteEdge(int idx) const
{
//NOTE: idx is in fact a Reference to an Edge in Source
//returns projection of ref'd Edge as BaseGeom. Why not just use existing BaseGeom(idx)?
App::DocumentObject* link = Source.getValue();
if (!link || !link->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
return 0;
const Part::TopoShape &topoShape = static_cast<Part::Feature*>(link)->Shape.getShape();
std::stringstream str;
str << "Edge" << idx;
TopoDS_Shape shape = topoShape.getSubShape(str.str().c_str());
const TopoDS_Shape &support = static_cast<Part::Feature*>(link)->Shape.getValue();
//TODO: make sure prjShape gets deleted
TechDrawGeometry::BaseGeom* prjShape = 0;
try {
prjShape = geometryObject->projectEdge(shape, support, Direction.getValue(), getValidXDir());
}
catch(Standard_Failure) {
Base::Console().Error("getCompleteEdge - OCC Error - could not project Edge: %d\n",idx);
return 0;
}
catch (exception& e) {
Base::Console().Error("getCompleteEdge - unknown exception on Edge: %d - %s\n",idx,e.what());
return 0;
}
catch(...) {
Base::Console().Error("getCompleteEdge - unknown error on Edge: %d\n",idx);
return 0;
}
return prjShape;
}
//! project Source Vertex(idx) to 2D geometry
TechDrawGeometry::Vertex * DrawViewPart::getVertex(int idx) const
{
//## Get the Part Link ##/
App::DocumentObject* link = Source.getValue();
if (!link || !link->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
return 0;
const Part::TopoShape &topoShape = static_cast<Part::Feature*>(link)->Shape.getShape();
std::stringstream str;
str << "Vertex" << idx;
TopoDS_Shape shape = topoShape.getSubShape(str.str().c_str());
const TopoDS_Shape &support = static_cast<Part::Feature*>(link)->Shape.getValue();
//TODO: Make sure prjShape gets deleted
TechDrawGeometry::Vertex *prjShape = geometryObject->projectVertex(shape, support, Direction.getValue(), getValidXDir());
//Base::Console().Log("vert %f, %f \n", prjShape->pnt.fX, prjShape->pnt.fY);
return prjShape;
}
TechDrawGeometry::Vertex* DrawViewPart::getVertexGeomByRef(int ref) const
{
const std::vector<TechDrawGeometry::Vertex *> &verts = getVertexGeometry();
if (verts.empty()) {
Base::Console().Log("INFO - getVertexGeomByRef(%d) - no Vertex Geometry. Probably restoring?\n",ref);
return NULL;
}
const std::vector<int> &vertRefs = getVertexReferences();
std::vector<TechDrawGeometry::Vertex *>::const_iterator vert = verts.begin();
bool found = false;
for(int i = 0 ; vert != verts.end(); ++vert, i++) {
if (vertRefs[i] == ref) {
found = true;
break;
}
}
if (found) {
return (*vert);
} else {
std::stringstream error;
error << "getVertexGeomByRef: no vertex geometry for ref: " << ref;
throw Base::Exception(error.str().c_str());
}
}
//! returns existing BaseGeom of Edge with 3D Reference = ref
TechDrawGeometry::BaseGeom* DrawViewPart::getEdgeGeomByRef(int ref) const
{
const std::vector<TechDrawGeometry::BaseGeom *> &geoms = getEdgeGeometry();
if (geoms.empty()) {
Base::Console().Log("INFO - getEdgeGeomByRef(%d) - no Edge Geometry. Probably restoring?\n",ref);
return NULL;
}
const std::vector<int> &refs = getEdgeReferences();
std::vector<TechDrawGeometry::BaseGeom*>::const_iterator it = geoms.begin();
bool found = false;
for(int i = 0 ; it != geoms.end(); ++it, i++) {
if (refs[i] == ref) {
found = true;
break;
}
}
if (found) {
return (*it);
} else {
std::stringstream error;
error << "getEdgeGeomByRef: no edge geometry for ref: " << ref;
throw Base::Exception(error.str().c_str());
}
}
//! returns existing BaseGeom of 2D Edge(idx)
TechDrawGeometry::BaseGeom* DrawViewPart::getProjEdgeByIndex(int idx) const
{
@@ -439,26 +313,6 @@ TechDrawGeometry::Vertex* DrawViewPart::getProjVertexByIndex(int idx) const
return geoms[idx];
}
int DrawViewPart::getEdgeRefByIndex(int idx) const
{
const std::vector<int> &refs = getEdgeReferences();
if (refs.empty()) {
Base::Console().Log("INFO - getEdgeRefByIndex(%d) - no Edge Geometry. Probably restoring?\n",idx);
return -1;
}
return refs[idx];
}
int DrawViewPart::getVertexRefByIndex(int idx) const
{
const std::vector<int> &refs = getVertexReferences();
if (refs.empty()) {
Base::Console().Log("INFO - getVertexRefByIndex(%d) - no Vertex Geometry. Probably restoring?\n",idx);
return -1;
}
return refs[idx];
}
Base::BoundBox3d DrawViewPart::getBoundingBox() const
{
return bbox;
@@ -547,17 +401,6 @@ Base::Vector3d DrawViewPart::getValidXDir() const
return xDir;
}
void DrawViewPart::dumpVertexRefs(char* text) const
{
Base::Console().Message("DUMP - %s\n",text);
const std::vector<int> &refs = getVertexReferences();
std::vector<int>::const_iterator it = refs.begin();
int i = 0;
for( ; it != refs.end(); it++, i++) {
Base::Console().Message("DUMP - Vertex: %d ref: %d\n",i,(*it));
}
}
void DrawViewPart::dumpVertexes(const char* text, const TopoDS_Shape& s)
{
Base::Console().Message("DUMP - %s\n",text);

View File

@@ -75,19 +75,6 @@ public:
TechDrawGeometry::BaseGeom* getProjEdgeByIndex(int idx) const; //get existing geom for edge idx in projection
TechDrawGeometry::Vertex* getProjVertexByIndex(int idx) const; //get existing geom for vertex idx in projection
int getEdgeRefByIndex(int idx) const; //get reference to Source edge for Projected edge idx
int getVertexRefByIndex(int idx) const; //get reference to Source Vertex for Projected Vertex idx
TechDrawGeometry::BaseGeom * getCompleteEdge(int idx) const; //project source edge idx
TechDrawGeometry::Vertex * getVertex(int idx) const; //project source vertex
TechDrawGeometry::Vertex* getVertexGeomByRef(int ref) const;
TechDrawGeometry::BaseGeom* getEdgeGeomByRef(int ref) const;
/// Get References for geometric features
const std::vector<int> & getVertexReferences() const;
const std::vector<int> & getEdgeReferences() const;
const std::vector<int> & getFaceReferences() const;
virtual Base::BoundBox3d getBoundingBox() const;
short mustExecute() const;
@@ -105,7 +92,6 @@ public:
//return PyObject as DrawViewPartPy
virtual PyObject *getPyObject(void);
void dumpVertexRefs(char* text) const;
void dumpVertexes(const char* text, const TopoDS_Shape& s);
protected:

View File

@@ -160,13 +160,8 @@ void GeometryObject::clear()
}
vertexGeom.clear();
vertexReferences.clear();
faceGeom.clear();
faceReferences.clear();
edgeGeom.clear();
edgeReferences.clear();
}
//!set up a hidden line remover and project a shape with it
@@ -175,8 +170,7 @@ void GeometryObject::projectShape(const TopoDS_Shape& input,
const Base::Vector3d& direction,
const Base::Vector3d& xAxis)
{
// Clear previous Geometry and References that may have been stored
//TODO: hate losing references on recompute! if Shape has changed, aren't reference potentially invalid anyway?
// Clear previous Geometry
clear();
Handle_HLRBRep_Algo brep_hlr = NULL;
@@ -290,7 +284,6 @@ void GeometryObject::addGeomFromCompound(TopoDS_Shape edgeCompound, edgeClass ca
base->classOfEdge = category;
base->visible = visible;
edgeGeom.push_back(base);
edgeReferences.push_back(-1);
//add vertices of new edge if not already in list
if (visible) {
@@ -311,14 +304,12 @@ void GeometryObject::addGeomFromCompound(TopoDS_Shape edgeCompound, edgeClass ca
if (v1Add) {
vertexGeom.push_back(v1);
v1->visible = true;
vertexReferences.push_back(-1);
} else {
delete v1;
}
if (v2Add) {
vertexGeom.push_back(v2);
v2->visible = true;
vertexReferences.push_back(-1);
} else {
delete v2;
}
@@ -327,11 +318,6 @@ void GeometryObject::addGeomFromCompound(TopoDS_Shape edgeCompound, edgeClass ca
}
}
//!find the 3D edges & vertices that correspond to 2D edges & vertices
void GeometryObject::update3DRefs()
{
}
//! empty Face geometry
void GeometryObject::clearFaceGeom()
{
@@ -636,189 +622,6 @@ Base::BoundBox3d GeometryObject::calcBoundingBox() const
return bbox;
}
////////////////// Project TopoDS_xxxxx routines
//! only ever called from FVP::getVertex which is never used, so obs?
TechDrawGeometry::Vertex * GeometryObject::projectVertex(const TopoDS_Shape &vert,
const TopoDS_Shape &support,
const Base::Vector3d &direction,
const Base::Vector3d &projXAxis) const
{
if(vert.IsNull())
throw Base::Exception("Projected vertex is null");
TechDrawGeometry::Vertex* result = NULL;
return result;
#if 0
gp_Pnt supportCentre = findCentroid(support, direction, projXAxis);
// mirror+scale vert around centre of support
gp_Trsf mat;
mat.SetMirror(gp_Ax2(supportCentre, gp_Dir(0, 1, 0)));
gp_Trsf matScale;
matScale.SetScale(supportCentre, Scale);
mat.Multiply(matScale);
//TODO: See if it makes sense to use gp_Trsf::Transforms() instead
BRepBuilderAPI_Transform mkTrfScale(vert, mat);
const TopoDS_Vertex &refVert = TopoDS::Vertex(mkTrfScale.Shape());
gp_Ax2 transform;
transform = gp_Ax2(supportCentre,
gp_Dir(direction.x, direction.y, direction.z),
gp_Dir(projXAxis.x, projXAxis.y, projXAxis.z));
HLRAlgo_Projector projector = HLRAlgo_Projector( transform );
projector.Scaled(true);
// If the index was found and is unique, the point is projected using the HLR Projector Algorithm //wf: what index?
gp_Pnt2d prjPnt;
projector.Project(BRep_Tool::Pnt(refVert), prjPnt);
TechDrawGeometry::Vertex *myVert = new Vertex(prjPnt.X(), prjPnt.Y());
return myVert;
#endif
}
//! only ever called from fvp::getCompleteEdge which is only ever called from CmdCreateDim for true dims. so obs?
TechDrawGeometry::BaseGeom * GeometryObject::projectEdge(const TopoDS_Shape &edge,
const TopoDS_Shape &support,
const Base::Vector3d &direction,
const Base::Vector3d &projXAxis) const
{
if(edge.IsNull())
throw Base::Exception("Projected edge is null");
// Invert y function using support to calculate bounding box
TechDrawGeometry::BaseGeom *result = 0;
return result;
#if 0
gp_Pnt supportCentre = findCentroid(support, direction, projXAxis);
gp_Trsf mat;
mat.SetMirror(gp_Ax2(supportCentre, gp_Dir(0, 1, 0)));
gp_Trsf matScale;
matScale.SetScale(supportCentre, Scale);
mat.Multiply(matScale);
BRepBuilderAPI_Transform mkTrfScale(edge, mat);
const TopoDS_Edge &refEdge = TopoDS::Edge(mkTrfScale.Shape());
gp_Ax2 transform;
transform = gp_Ax2(supportCentre,
gp_Dir(direction.x, direction.y, direction.z),
gp_Dir(projXAxis.x, projXAxis.y, projXAxis.z));
BRepAdaptor_Curve refCurve(refEdge);
HLRAlgo_Projector projector = HLRAlgo_Projector( transform );
projector.Scaled(true);
if (refCurve.GetType() == GeomAbs_Line) {
// Use the simpler algorithm for lines
gp_Pnt p1 = refCurve.Value(refCurve.FirstParameter());
gp_Pnt p2 = refCurve.Value(refCurve.LastParameter());
// Project the points
gp_Pnt2d pnt1, pnt2;
projector.Project(p1, pnt1);
projector.Project(p2, pnt2);
TechDrawGeometry::Generic *line = new TechDrawGeometry::Generic();
line->points.push_back(Base::Vector2D(pnt1.X(), pnt1.Y()));
line->points.push_back(Base::Vector2D(pnt2.X(), pnt2.Y()));
return line;
} else {
HLRBRep_Curve curve;
curve.Curve(refEdge);
curve.Projector(&projector);
TechDrawGeometry::BaseGeom *result = 0;
TopoDS_Edge e = BRepBuilderAPI_MakeEdge(curve.Curve());
switch(HLRBRep_BCurveTool::GetType(curve.Curve()))
{
case GeomAbs_Line: {
TechDrawGeometry::Generic *line = new TechDrawGeometry::Generic(e,ecTrue,true);
// gp_Pnt2d pnt1 = curve.Value(curve.FirstParameter());
// gp_Pnt2d pnt2 = curve.Value(curve.LastParameter());
// line->points.push_back(Base::Vector2D(pnt1.X(), pnt1.Y()));
// line->points.push_back(Base::Vector2D(pnt2.X(), pnt2.Y()));
result = line;
}break;
case GeomAbs_Circle: {
TechDrawGeometry::Circle *circle = new TechDrawGeometry::Circle(e,ecTrue,true));
gp_Circ2d prjCirc = curve.Circle();
double f = curve.FirstParameter();
double l = curve.LastParameter();
gp_Pnt2d s = curve.Value(f);
gp_Pnt2d e = curve.Value(l);
if (fabs(l-f) > 1.0 && s.SquareDistance(e) < 0.001) {
circle->radius = prjCirc.Radius();
circle->center = Base::Vector2D(prjCirc.Location().X(), prjCirc.Location().Y());
result = circle;
} else {
AOC *aoc = new AOC(curve.Curve());
aoc->radius = prjCirc.Radius();
aoc->center = Base::Vector2D(prjCirc.Location().X(), prjCirc.Location().Y());
double ax = s.X() - aoc->center.fX;
double ay = s.Y() - aoc->center.fY;
double bx = e.X() - aoc->center.fX;
double by = e.Y() - aoc->center.fY;
aoc->startAngle = atan2(ay,ax);
float range = atan2(-ay*bx+ax*by, ax*bx+ay*by);
aoc->endAngle = aoc->startAngle + range;
result = aoc;
}
} break;
case GeomAbs_Ellipse: {
gp_Elips2d prjEllipse = curve.Ellipse();
double f = curve.FirstParameter();
double l = curve.LastParameter();
gp_Pnt2d s = curve.Value(f);
gp_Pnt2d e = curve.Value(l);
if (fabs(l-f) > 1.0 && s.SquareDistance(e) < 0.001) {
Ellipse *ellipse = new Ellipse();
ellipse->major = prjEllipse.MajorRadius();
ellipse->minor = prjEllipse.MinorRadius();
ellipse->center = Base::Vector2D(prjEllipse.Location().X(),
prjEllipse.Location().Y());
result = ellipse;
// TODO: Finish implementing ellipsey stuff
} else {
// TODO implement this correctly
AOE *aoe = new AOE();
aoe->major = prjEllipse.MajorRadius();
aoe->minor = prjEllipse.MinorRadius();
aoe->center = Base::Vector2D(prjEllipse.Location().X(),
prjEllipse.Location().Y());
result = aoe;
}
} break;
case GeomAbs_BSplineCurve: {
// TODO: Project BSpline here?
} break;
default:
break;
}
return result;
}
#endif
}
/////////////////////////////////////////////////////
//! does this GeometryObject already have this vertex
bool GeometryObject::findVertex(Base::Vector2D v)
{

View File

@@ -73,27 +73,11 @@ public:
const std::vector<BaseGeom *> & getEdgeGeometry() const { return edgeGeom; };
const std::vector<Face *> & getFaceGeometry() const { return faceGeom; };
const std::vector<int> & getVertexRefs() const { return vertexReferences; };
const std::vector<int> & getEdgeRefs() const { return edgeReferences; };
const std::vector<int> & getFaceRefs() const { return faceReferences; };
//begin obs?
BaseGeom* projectEdge(const TopoDS_Shape &edge,
const TopoDS_Shape &support,
const Base::Vector3d &direction,
const Base::Vector3d &projXAxis) const;
Vertex* projectVertex(const TopoDS_Shape &vert,
const TopoDS_Shape &support,
const Base::Vector3d &direction,
const Base::Vector3d &projXAxis) const;
//end obs?
void projectShape(const TopoDS_Shape &input,
const gp_Pnt& inputCenter,
const Base::Vector3d &direction,
const Base::Vector3d &xAxis);
void extractGeometry(edgeClass category, bool visible);
void update3DRefs();
void addFaceGeom(Face * f);
void clearFaceGeom();
@@ -140,11 +124,6 @@ protected:
bool findVertex(Base::Vector2D v);
// indexes to geometry in Source object
std::vector<int> vertexReferences;
std::vector<int> edgeReferences;
std::vector<int> faceReferences;
double Tolerance;
double Scale;
};

View File

@@ -365,7 +365,6 @@ void MDIViewPage::preSelectionChanged(const QPoint &pos)
TechDraw::DrawView *viewObj = viewItem->getViewObject();
std::stringstream ss;
//ss << "Edge" << edge->getReference();
ss << "Edge" << edge->getProjIndex();
//bool accepted =
static_cast<void> (Gui::Selection().setPreselect(viewObj->getDocument()->getName()
@@ -376,8 +375,6 @@ void MDIViewPage::preSelectionChanged(const QPoint &pos)
,0));
} else if(vert) {
// Find the parent view that this edges is contained within
//WF: sb Vertex??
QGraphicsItem*parent = vert->parentItem();
if(!parent)
return;
@@ -388,7 +385,7 @@ void MDIViewPage::preSelectionChanged(const QPoint &pos)
TechDraw::DrawView *viewObj = viewItem->getViewObject();
std::stringstream ss;
ss << "Edge" << vert->getReference(); //WF: sb Vertex??
ss << "Vertex" << vert->getProjIndex();
//bool accepted =
static_cast<void> (Gui::Selection().setPreselect(viewObj->getDocument()->getName()
,viewObj->getNameInDocument()
@@ -397,8 +394,6 @@ void MDIViewPage::preSelectionChanged(const QPoint &pos)
,pos.y()
,0));
} else {
// Check if an edge was preselected
//WF: sb View?
QGIView *view = qobject_cast<QGIView *>(obj);
if(!view)

View File

@@ -50,9 +50,6 @@ public:
QPainterPath shape() const;
virtual void paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = 0 );
//TODO: edge doesn't need ref to 3D, just index in projection. links to 3D handled in Features.
int getReference() const { return reference; }
void setReference(int ref) {reference = ref; }
int getProjIndex() const { return projIndex; }
void setHighlighted(bool state);
@@ -72,7 +69,6 @@ protected:
QVariant itemChange(GraphicsItemChange change, const QVariant &value);
int projIndex; //index of edge in Projection. must exist.
int reference; //index of edge in DrawViewPart Source. may not exist(-1).
bool isHighlighted;
bool isCosmetic;

View File

@@ -85,23 +85,6 @@ QGIHatch::~QGIHatch()
{
}
#if 0
void QGIHatch::draw()
{
const std::vector<App::DocumentObject*> &objects = hatch->Edges.getValues();
//const std::vector<std::string> &SubNames = hatch->Edges.getSubValues();
//const TechDraw::DrawViewPart *refObj = static_cast<const TechDraw::DrawViewPart*>(objects[0]);
//for edgeName in SubNames
// iEdge = _getIndexFromName(edgeName) //from CommandCreateDims.cpp
// geom = refObj->getEdgeGeomByRef(iEdge)
// subPath = drawPainterPath(geom) //from qgiViewPart
// m_path.addPath(subPath)
//m_path = m_path.simplified() //????
//m_face->setPath(m_path);
}
#endif
QVariant QGIHatch::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemSelectedHasChanged && scene()) {

View File

@@ -48,8 +48,6 @@ public:
int type() const { return Type;}
virtual void paint(QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget = 0 );
int getReference() const { return reference; }
void setReference(int ref) {reference = ref; }
int getProjIndex() const { return projIndex; }
float getRadius() { return m_radius; }
@@ -68,7 +66,6 @@ protected:
QVariant itemChange(GraphicsItemChange change, const QVariant &value);
int projIndex; //index of vertex in Projection. must exist.
int reference; //index of vertex in DrawView Source. may not exist(-1).
bool isHighlighted;

View File

@@ -359,7 +359,6 @@ void QGIViewPart::drawViewPart()
// Draw Edges
const std::vector<TechDrawGeometry::BaseGeom *> &geoms = viewPart->getEdgeGeometry();
const std::vector<int> &refs = viewPart->getEdgeReferences();
std::vector<TechDrawGeometry::BaseGeom *>::const_iterator itEdge = geoms.begin();
QGIEdge* item;
@@ -379,7 +378,6 @@ void QGIViewPart::drawViewPart()
}
if (showEdge) {
item = new QGIEdge(i);
item->setReference(refs.at(i));
addToGroup(item); //item is at scene(0,0), not group(0,0)
item->setPos(0.0,0.0);
item->setPath(drawPainterPath(*itEdge));
@@ -403,11 +401,9 @@ void QGIViewPart::drawViewPart()
// Draw Vertexs:
const std::vector<TechDrawGeometry::Vertex *> &verts = viewPart->getVertexGeometry();
const std::vector<int> &vertRefs = viewPart->getVertexReferences();
std::vector<TechDrawGeometry::Vertex *>::const_iterator vert = verts.begin();
for(int i = 0 ; vert != verts.end(); ++vert, i++) {
QGIVertex *item = new QGIVertex(i);
item->setReference(vertRefs.at(i));
addToGroup(item);
item->setPos((*vert)->pnt.fX, (*vert)->pnt.fY); //this is in ViewPart coords
item->setRadius(lineWidth * vertexScaleFactor);
@@ -578,28 +574,6 @@ void QGIViewPart::pathArcSegment(QPainterPath &path,
a00 * x3 + a01 * y3, a10 * x3 + a11 * y3);
}
QGIEdge * QGIViewPart::findRefEdge(int idx)
{
QList<QGraphicsItem*> items = childItems();
for(QList<QGraphicsItem*>::iterator it = items.begin(); it != items.end(); it++) {
QGIEdge *edge = dynamic_cast<QGIEdge *>(*it);
if(edge && edge->getReference() == idx)
return edge;
}
return 0;
}
QGIVertex * QGIViewPart::findRefVertex(int idx)
{
QList<QGraphicsItem*> items = childItems();
for(QList<QGraphicsItem*>::iterator it = items.begin(); it != items.end(); it++) {
QGIVertex *vert = dynamic_cast<QGIVertex *>(*it);
if(vert && vert->getReference() == idx)
return vert;
}
return 0;
}
void QGIViewPart::toggleCache(bool state)
{
QList<QGraphicsItem*> items = childItems();

View File

@@ -70,9 +70,6 @@ Q_SIGNALS:
void dirty();
protected:
QGIEdge * findRefEdge(int i);
QGIVertex * findRefVertex(int idx);
/// Helper for pathArc()
/*!
* x_axis_rotation is in radian