[vtkusers] Help with picking please!

[Beau Sapach]

Hi everyone,  I've been beating my head against the wall with this... Anyone 
know why (in the following code) pick operation #2 works?  Even though the 
actor is NOT using that point?

Beau

	vtkBMPReader * bmpread = vtkBMPReader::New();
	vtkRenderWindow * renwin = vtkRenderWindow::New();
	vtkRenderer * ren = vtkRenderer::New();
	vtkImageMapper * mapper = vtkImageMapper::New();
	vtkActor2D * actor = vtkActor2D::New();

	bmpread->SetFileName("d:\\blah.bmp");
	mapper->SetInput(bmpread->GetOutput());
	actor->SetMapper(mapper);
	ren->AddActor2D(actor);
	// offset the actor's position so that
	// a pick with x or y < 12 should not work...
	actor->SetDisplayPosition(12,12);
	renwin->AddRenderer(ren);
	renwin->SetSize(1000,500);
	renwin->Render();
	double x,y;

        // PICK #1
	// First try picking something that's obviously
	// outside of the image bounds
	x=990; y=499;
	int r = 0;
	vtkPropPicker * picker = vtkPropPicker::New();
	r = picker->Pick(x,y,0,ren);
	if(r==1){AfxMessageBox("success");}
	
        // PICK #2
        // Again pick a point that the image is not
	// using ( less than 12! )
	x=y=10;
	r = picker->Pick(x,y,0,ren);
	if(r==1){AfxMessageBox("success");}