<FONT face=Arial>Hi, everyone,<BR> I am displaying several 2D images using class vtkImageViewer2, of course, there is several objects of class vtkImageViewer2. and I want to know which object would be picked when I press my mouse left button. so I want to use vtkPointPicker to do it.<BR> however, the actor of class vtkImageViewer2 is vtkImageActor, while class vtkPointPicker could only get a object of class vtkActor by method GetActor(). so I have to change my mind. I want to testify which vtkImageViewer2 would be picked by class vtkRenderWindowInteractor.<BR> I add a mouse events observer like:<BR><FONT color=#0000ff>virtual void execute(...) {<BR> // picker and viewer are pointers to the actual vtkPointPicker/vtkImageViewer2 objects.<BR> int i = picker->Pick(viewer->GetRenderWindow()->GetInteractor()->GetEventPosition()[0],<BR> viewer->GetRenderWindow()->GetInteractor()->GetEventPosition()[1],<BR> viewer->GetSlice(), viewer->GetRenderer());<BR> if (i == 0) <BR> {<BR> return;<BR> }<BR> vtkRenderWindowInteractor * temp = picker->GetRenderer()->GetRenderWindow()->GetInteractor();<BR> <FONT color=#ff0000>// .... and then test which vtkImageViewer2 the interactor is in<BR> // but it don't work!!!!<BR></FONT>} <BR></FONT> who can tell me how to pick one object of vtkImageViewer2 from the objects set of vtkImageViewer2? is there any method to know whick one I have picked?<BR> thank you!<BR> MJ</FONT>
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