[vtkusers] problem with GetEventPosion

[Mathieu Malaterre]

Binjie Qin wrote:
> Hi vtkuser: I have had problem with vtkRenderWindowInteractor's
> function, GetEventPosion(), in picking the event position (such
> mouse's leftbutton down)in render window's screen display coordinate.
>  Due to new implementation of vtkRenderWindowInteractor in vtk4.2,
> the Position gotted is not actually the event position in window's
> screen display coordinate when actor in render window was scaled or
> rotated. How to get the position at render window's sreen disply
> coordinate using GetEventPosion() function? Any help?

Binjie,

	You can try something like:

y = rwi->GetSize()[1] - rwi->GetEventPosition()[1] - 1;

'rwi' being your renderwindowinteractor:


HTH
Mathieu
Ps: Have also a look to 'vtkRenderWindowInteractor::SetEventPositionFlipY'