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

[Anja Ende]

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/d99891b9/attachment.htm>