[vtkusers] vtkCamera viewTransformMatrix seems wrong

[alykhantejani]

I have an object at the origin and am moving the camera to (0,650,650) and
setting the focal point to the origin i.e.:

    vtkSmartPointer<vtkCamera> cam = vtkSmartPointer<vtkCamera>::New();
    renderer->SetActiveCamera(cam);
    	
    cam->SetFocalPoint(0., 0., 0.);
    cam->SetPosition(0., 650, 650);
    cam->SetViewAngle(view_angle_);
    	
    cam->SetViewUp(0., 1., 0.);

However when I get the view transform matrix of the camera by:

    vtkSmartPointer<vtkMatrix4x4> transform_view =
cam->GetViewTransformMatrix();

And print it I get the following:

    | 1 |    0    |    0    |     0    | 
    | 0 | cos(45) | -sin(45)|     0    | 
    | 0 | sin(45) | cos(45) | -919.239 | 
    | 0 |    0    |    0    |     1    | 

Where the rotation part seems correct (45 degrees around the x axis) but the
translation seems all wrong. Should the last column not be:

    | 0 |
    |650|
    |650|

Or am I doing something wrong?

Thanks




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