Poking around drawedit.

Posted on April 1, 2012 by admin

I’m been poking around the code, and things have been more or less making sense to me until I ran into this draw edit thing…

void ViewProviderSketch::drawEdit(const std::vector<Base::Vector2D> &EditCurve)
{
assert(edit);

edit->EditCurveSet->numVertices.setNum(1);
edit->EditCurvesCoordinate->point.setNum(EditCurve.size());
SbVec3f *verts = edit->EditCurvesCoordinate->point.startEditing();
int32_t *index = edit->EditCurveSet->numVertices.startEditing();

int i=0; // setting up the line set
for (std::vector<Base::Vector2D>::const_iterator it = EditCurve.begin(); it != EditCurve.end(); ++it,i++)
verts[i].setValue(it->fX,it->fY,zEdit);

index[0] = EditCurve.size();
edit->EditCurvesCoordinate->point.finishEditing();
edit->EditCurveSet->numVertices.finishEditing();
}

I’m note really sure what’s going on here. So I’m going to attempt to figure this one out here…

Ok…It seems like the first thing I should look at is edit and see what’s up with that….

Sooo.. edit is a pointer to  a Structure EditData   declared in class ViewProviderSketch

struct EditData {
EditData():
sketchHandler(0),
DragPoint(-1),
DragCurve(-1),
DragConstraint(-1),
PreselectPoint(-1),
PreselectCurve(-1),
PreselectCross(-1),
PreselectConstraint(-1),
blockedPreselection(false),
FullyConstrained(false),
//ActSketch(0),
EditRoot(0),
PointsMaterials(0),
CurvesMaterials(0),
PointsCoordinate(0),
CurvesCoordinate(0),
CurveSet(0),
PointSet(0)
{}

// pointer to the active handler for new sketch objects
DrawSketchHandler *sketchHandler;

// dragged point
int DragPoint;
// dragged curve
int DragCurve;
// dragged constraint
int DragConstraint;

SbColor PreselectOldColor;
int PreselectPoint;
int PreselectCurve;
int PreselectCross;
int PreselectConstraint;
bool blockedPreselection;
bool FullyConstrained;

// pointer to the Solver
Sketcher::Sketch ActSketch;
// container to track our own selected parts
std::set<int> SelPointSet;
std::set<int> SelCurvSet; // also holds cross axes at -1 and -2
std::set<int> SelConstraintSet;

// helper data structure for the constraint rendering
std::vector<ConstraintType> vConstrType;

// nodes for the visuals
SoSeparator   *EditRoot;
SoMaterial    *PointsMaterials;
SoMaterial    *CurvesMaterials;
SoMaterial    *RootCrossMaterials;
SoMaterial    *EditCurvesMaterials;
SoCoordinate3 *PointsCoordinate;
SoCoordinate3 *CurvesCoordinate;
SoCoordinate3 *RootCrossCoordinate;
SoCoordinate3 *EditCurvesCoordinate;
SoLineSet     *CurveSet;
SoLineSet     *EditCurveSet;
SoLineSet     *RootCrossSet;
SoMarkerSet   *PointSet;

SoText2       *textX;
SoTranslation *textPos;

SoGroup       *constrGroup;
};

EditData *edit;

The structure look like this:
/// Data structure while edit the sketch
struct EditData {
EditData():
sketchHandler(0),
DragPoint(-1),
DragCurve(-1),
DragConstraint(-1),
PreselectPoint(-1),
PreselectCurve(-1),
PreselectCross(-1),
PreselectConstraint(-1),
blockedPreselection(false),
FullyConstrained(false),
//ActSketch(0),
EditRoot(0),
PointsMaterials(0),
CurvesMaterials(0),
PointsCoordinate(0),
CurvesCoordinate(0),
CurveSet(0),
PointSet(0)
{}

// pointer to the active handler for new sketch objects
DrawSketchHandler *sketchHandler;

// dragged point
int DragPoint;
// dragged curve
int DragCurve;
// dragged constraint
int DragConstraint;

SbColor PreselectOldColor;
int PreselectPoint;
int PreselectCurve;
int PreselectCross;
int PreselectConstraint;
bool blockedPreselection;
bool FullyConstrained;

// pointer to the Solver
Sketcher::Sketch ActSketch;
// container to track our own selected parts
std::set<int> SelPointSet;
std::set<int> SelCurvSet; // also holds cross axes at -1 and -2
std::set<int> SelConstraintSet;

// helper data structure for the constraint rendering
std::vector<ConstraintType> vConstrType;

// nodes for the visuals
SoSeparator   *EditRoot;
SoMaterial    *PointsMaterials;
SoMaterial    *CurvesMaterials;
SoMaterial    *RootCrossMaterials;
SoMaterial    *EditCurvesMaterials;
SoCoordinate3 *PointsCoordinate;
SoCoordinate3 *CurvesCoordinate;
SoCoordinate3 *RootCrossCoordinate;
SoCoordinate3 *EditCurvesCoordinate;
SoLineSet     *CurveSet;
SoLineSet     *EditCurveSet;
SoLineSet     *RootCrossSet;
SoMarkerSet   *PointSet;

SoText2       *textX;
SoTranslation *textPos;

SoGroup       *constrGroup;
};

Sooo..  the pointer edit is set to null in the ViewProviderSketch constructor.

edit has the address of a new object of type EditData that is created and assigned in  bool ViewProviderSketch::setEdit(int ModNum).

It seems that this object is destroyed in void ViewProviderSketch::unsetEdit(int ModNum)

void ViewProviderSketch::unsetEdit(int ModNum)
{
ShowGrid.setValue(false);
TightGrid.setValue(true);

edit->EditRoot->removeAllChildren();
pcRoot->removeChild(edit->EditRoot);

if (edit->sketchHandler)
purgeHandler();

delete edit;
edit = 0;

this->show();

// and update the sketch
getSketchObject()->getDocument()->recompute();

// clear the selection and set the new/edited sketch(convenience)
Gui::Selection().clearSelection();
std::string ObjName = getSketchObject()->getNameInDocument();
std::string DocName = getSketchObject()->getDocument()->getName();
Gui::Selection().addSelection(DocName.c_str(),ObjName.c_str());

// when pressing ESC make sure to close the dialog
Gui::Control().closeDialog();
}

Ok… I set a break point on setEdit and it seemed to break when a sketch is created

0    SketcherGui::ViewProviderSketch::setEdit    ViewProviderSketch.cpp    2683    0x7fffd672852d
1    Gui::ViewProvider::startEditing    ViewProvider.cpp    94    0x7ffff7799ca5
2    Gui::View3DInventorViewer::setEditingViewProvider    View3DInventorViewer.cpp    363    0x7ffff7776c5d
3    Gui::Document::setEdit    Document.cpp    188    0x7ffff75388cf
4    Gui::DocumentPy::setEdit    DocumentPyImp.cpp    108    0x7ffff75564cf
5    Gui::DocumentPy::staticCallback_setEdit    DocumentPy.cpp    399    0x7ffff75534cf
6    PyEval_EvalFrameEx    /usr/lib/libpython2.6.so.1.0    0    0x7ffff651a030
7    PyEval_EvalCodeEx    /usr/lib/libpython2.6.so.1.0    0    0x7ffff651bd60
8    PyEval_EvalCode    /usr/lib/libpython2.6.so.1.0    0    0x7ffff651be32
9    PyRun_StringFlags    /usr/lib/libpython2.6.so.1.0    0    0x7ffff6539d1c
10    Base::InterpreterSingleton::runString    Interpreter.cpp    117    0x7ffff69ed333
11    Gui::Command::doCommand    Command.cpp    413    0x7ffff75794bb
12    CmdSketcherNewSketch::activated    Command.cpp    156    0x7fffd66e2990
13    Gui::Command::invoke    Command.cpp    282    0x7ffff7578d6f
14    Gui::Action::onActivated    Action.cpp    82    0x7ffff756e4fb
15    Gui::Action::qt_metacall    moc_Action.cpp    73    0x7ffff7574d04
16    QMetaObject::activate(QObject*, QMetaObject const*, int, void**)    /usr/lib/libQtCore.so.4    0    0x7ffff15f2e3f
17    QAction::triggered(bool)    /usr/lib/libQtGui.so.4    0    0x7ffff2696032
18    QAction::activate(QAction::ActionEvent)    /usr/lib/libQtGui.so.4    0    0x7ffff26980ab
19    ??    /usr/lib/libQtGui.so.4    0    0x7ffff2ad739d
20    ??    /usr/lib/libQtGui.so.4    0    0x7ffff2adcdda
21    QWidget::event(QEvent*)    /usr/lib/libQtGui.so.4    0    0x7ffff26f2582
22    QMenu::event(QEvent*)    /usr/lib/libQtGui.so.4    0    0x7ffff2adef9b
23    QApplicationPrivate::notify_helper(QObject*, QEvent*)    /usr/lib/libQtGui.so.4    0    0x7ffff269c22c
24    QApplication::notify(QObject*, QEvent*)    /usr/lib/libQtGui.so.4    0    0x7ffff26a2ecb
25    Gui::GUIApplication::notify    Application.cpp    1465    0x7ffff751a1c1
26    QCoreApplication::notifyInternal(QObject*, QEvent*)    /usr/lib/libQtCore.so.4    0    0x7ffff15e006c
27    QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool)    /usr/lib/libQtGui.so.4    0    0x7ffff26a20ae
28    ??    /usr/lib/libQtGui.so.4    0    0x7ffff27223dd
29    QApplication::x11ProcessEvent(_XEvent*)    /usr/lib/libQtGui.so.4    0    0x7ffff27208ac
30    ??    /usr/lib/libQtGui.so.4    0    0x7ffff274c882
31    g_main_context_dispatch    /lib/libglib-2.0.so.0    0    0x7fffeb89e8c2
32    ??    /lib/libglib-2.0.so.0    0    0x7fffeb8a2748
33    g_main_context_iteration    /lib/libglib-2.0.so.0    0    0x7fffeb8a28fc
34    QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)    /usr/lib/libQtCore.so.4    0    0x7ffff1609513
35    ??    /usr/lib/libQtGui.so.4    0    0x7ffff274c46e
36    QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)    /usr/lib/libQtCore.so.4    0    0x7ffff15de992
37    QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)    /usr/lib/libQtCore.so.4    0    0x7ffff15ded6c
38    QCoreApplication::exec()    /usr/lib/libQtCore.so.4    0    0x7ffff15e2aab
39    Gui::Application::runApplication    Application.cpp    1689    0x7ffff7516557
40    main    MainGui.cpp    361    0x4096e7

void ViewProviderSketch::drawEdit(const std::vector<Base::Vector2D> &EditCurve)
{
assert(edit);

edit->EditCurveSet->numVertices.setNum(1);
edit->EditCurvesCoordinate->point.setNum(EditCurve.size());
SbVec3f *verts = edit->EditCurvesCoordinate->point.startEditing();
int32_t *index = edit->EditCurveSet->numVertices.startEditing();

int i=0; // setting up the line set
for (std::vector<Base::Vector2D>::const_iterator it = EditCurve.begin(); it != EditCurve.end(); ++it,i++)
verts[i].setValue(it->fX,it->fY,zEdit);

index[0] = EditCurve.size();
edit->EditCurvesCoordinate->point.finishEditing();
edit->EditCurveSet->numVertices.finishEditing();
}

Ok EditCurveSet is of type SoLineSet

http://doc.coin3d.org/Coin/classSoLineSet.html#_details

SoCoordinate3 *EditCurvesCoordinate;

http://doc.coin3d.org/Coin/classSoCoordinate3.html#_details

Ok… My brain is starting to ache..  I guess I need to look at this coin/inventor stuff.
I found a link to a pdf tutorial that looks fairly interesting; PG-GettingStarted.pdf

http://www.ims.tuwien.ac.at/teaching/vr/tutorial/content1.html

This  looks… like the place to get started:

http://www.cse.unr.edu/~b_yi/coin3d/chapter01/index.html

 

 

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