[vtkusers] Re: vtkPropPicker question... possible bug??

[Anja Ende]

Oops. Forgot the link there:

http://public.kitware.com/pipermail/vtkusers/2004-October/077010.html

On 03/10/06, Anja Ende <anja.ende at googlemail.com> wrote:
>
> Looks like another person had the same problem.
>
> However, that thread has no further replies :((( but this is the exact
> behavior that I am experiencing.
>
> Any experts here who have successfully implemented picking on 2D actors
> that are rendered on top of each other?
>
> Cheers,
> Anja
>
> On 03/10/06, Anja Ende <anja.ende at googlemail.com> wrote:
> >
> > Here is the PrintSelf() output of the actor 2D that I am trying to pick.
> > Maybe this will give someone a hint as to why it gets picked at (0, 0)
> > instead of (238.5,209,0)
> >
> >  Debug: Off
> >  Modified Time: 5308
> >  Reference Count: 2
> >  Registered Events: (none)
> >  Dragable: On
> >  Pickable: On
> >  AllocatedRenderTime: 5000
> >  EstimatedRenderTime: 0
> >  NumberOfConsumers: 1
> >  RenderTimeMultiplier: 0.001
> >  Visibility: On
> >  Layer Number: 0
> >
> >  PositionCoordinate: 0xa7f650
> >    Debug: Off
> >    Modified Time: 4850
> >    Reference Count: 2
> >    Registered Events: (none)
> >    Coordinate System: Viewport
> >    Value: (238.5,209,0)
> >    ReferenceCoordinate: (none)
> >    Viewport: (none)
> >
> >  Position2 Coordinate: 0xa97ae0
> >    Debug: Off
> >    Modified Time: 228
> >    Reference Count: 1
> >    Registered Events: (none)
> >    Coordinate System: Normalized Viewport
> >    Value: ( 0.5,0.5,0)
> >    ReferenceCoordinate: 0xa7f650
> >    Viewport: (none)
> >
> >  Property: 0xac0f80
> >    Debug: Off
> >    Modified Time: 5307
> >    Reference Count: 1
> >    Registered Events: (none)
> >    Opacity: 1
> >    Color: (1, 1, 1)
> >    Point size: 1
> >    Line width: 1
> >    Line stipple pattern: 65535
> >    Line stipple repeat factor: 1
> >    Display location: foreground
> >
> >  Mapper: 0xa96980
> >    Debug: Off
> >    Modified Time: 221
> >    Reference Count: 3
> >    Registered Events: (none)
> >    Executive: 0xa973a0
> >    ErrorCode: Success
> >    Information: 0xa96b00
> >    AbortExecute: Off
> >    Progress: 0
> >    Progress Text: (None)
> >    TimeToDraw: 0
> >    ClippingPlanes: (none)
> >    Color Window: 255
> >    Color Level: 127.5
> >    ZSlice: 0
> >    RenderToRectangle: 0
> >    UseCustomExtents: 0
> >    CustomDisplayExtents: 0 0 0 0
> >
> >
> > Thanks,
> > Anja
> >
> >
> > On 03/10/06, Anja Ende <anja.ende at googlemail.com> wrote:
> > >
> > > Ok, I might have found a bug with the vtkPropPicker class or maybe
> > > something is missing from my code.
> > >
> > > I have moved my cursor actor with the code:
> > >
> > > m_actor->SetPosition(x, y);
> > >
> > > However, when I click on the bottom left corner of my view, so
> > > basically around (0, 0) then it picks the cursor! Even though, on my screen
> > > it is at another position! Surely this is a bug???
> > >
> > > Cheers,
> > >
> > > Anja
> > >
> > > On 03/10/06, Anja Ende < anja.ende at googlemail.com> wrote:
> > > >
> > > > Hi everyone,
> > > >
> > > > I have a renderer that has 2 actors as follows:
> > > >
> > > > this->m_renderer->AddActor(this->m_actor2D);
> > > > this->m_renderer->AddActor(m_cursor.GetActor());
> > > >
> > > > Now, I am trying to pick this cursor actor on mouse clicks as
> > > > follows:
> > > >
> > > > // This code is in vtkInteractorStyleImage based class...
> > > >
> > > > int x = this->Interactor->GetEventPosition()[0];
> > > > int y = this->Interactor->GetEventPosition()[1];
> > > > this->FindPokedRenderer(x, y);
> > > >
> > > > if (this->CurrentRenderer == NULL)
> > > >     return;
> > > >
> > > > vtkPropPicker * picker = vtkPropPicker::New();
> > > > if (picker->PickProp(x, y, this->CurrentRenderer))
> > > > {
> > > >        vtkProp * prop = picker->GetViewProp();
> > > >        std::cout << prop << ":  " << m_viewer->m_cursor.GetActor()
> > > > << ":  " << m_viewer->m_actor2D << std::endl;
> > > >
> > > > }
> > > > picker->Delete();
> > > >
> > > >
> > > > Now no matter where I click, on the cursor image or on the
> > > > underlying image, I always seem to pick the bottom image and never the
> > > > cursor image. Is it possible to actually layer these objects somehow and
> > > > pick the top most one or something like that...
> > > >
> > > > Cheers,
> > > > Anja
> > > >
> > >
> > >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20061003/62bc19c6/attachment.htm>