[vtkusers] problem to adjust CAMERA

[Rio]

Now i am writing a program to view 3D data. I set a default view:
this->DefaultCam = vtkCamera::New();

for the 3D space, the view is xoy, z axis is pointing to me, so SetPosition
is (0,0,1) be default.

I wanna change the camera to yoz, x axis pointing to me, so should be
(1,0,0) for SetPosition. BUT, seems nothing happened after i change
"DefaultCam->SetPosition(1,0,0); "

What is wrong??? can anyone just help?
Thanks!
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