[vtkusers] How To Save A BMP Picture Shown by y-z Axes ?

[JohnMark]

Hi , vtkusers ,
    I meet a problem when I save a BMP picture using vtkBMPWriter , that is , I can save a x-y axes picture perfectly , however , there is nothing when I decide to save a y-z axes picture , at the same time , the y-z picture can be shown in vtkImageViewer . 
    so how should I do if I want to save a y-z axes picture using vtkBMPWriter ?  
    in vtkBMPWriter , there is a function SetFileDimensionality() , but it just to set the file dimension : 2 or 3 . perhaps WriteFile() maybe work , unfortunately , I don't know how to use it .
    thank you with great regards ! 
    Mark 
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