[vtkusers] Get the selection point in screen (pixel) coordinates

[Xiaopeng Yang]

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Dear friends,



I applied vtkPointPicker to pick a point in screen (pixel) coordinates from a dataset. The data are a series of CT images. However, there are two problems: 1) the z value is always 0, no matter in which slice I pick a point; 2) the x and y values are different from other programs like MITK. I compared the values of the same point between my program and MITK. MITK shows that the z value changes according to which slice you are in to pick a point.



Here is my code:






double


 


std::cout <<


 index[3];
this
->Interactor->GetPicker()->GetSelectionPoint(index);
"Index: "
 << index[0] << 
" "
 << index[1] << 
" "
 << index[2] << std::endl;









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Ergonomic Design Technology Lab

Dept. of Industrial and Management Engineering

Pohang Univ. of Science and Technology

South Korea

Tel: 82-54-279-8246

HP: 82-10-9794-0110
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