[vtkusers] Problem with vtkCamera.

[Denis Shamonin]

I have something strange with vtkCamera and setting position on (0,0,0),

This is the part of code:

vtkRenderer *renderer = vtkRenderer::New();
vtkCamera *camera = vtkCamera::New();
   camera->SetPosition(0,0,0);
   camera->SetFocalPoint(0,-1,0);
renderer->SetActiveCamera(camera);
// Test for the matrix of the view transform.
vtkMatrix4x4 *test =
renderer->GetActiveCamera()->GetViewTransformMatrix();
   test->PrintSelf(cout,0);

And i see very strange information:
Does it bug in vtkCamera ?
And i can't see anything in window.
------------------------------
Debug: Off
Modified Time: 305
Reference Count: 1
Elements:
0 0 0 0
0 0 0 0
0 1 0 0
0 0 0 1
------------------------------

But if do like this, everything work correct
   camera->SetPosition(0,0,0);
   camera->SetFocalPoint(-1,0,0);

------------------------------
Debug: Off
Modified Time: 305
Reference Count: 1
Elements:
0 0 -1 0
0 1 0 0
1 0 0 0
0 0 0 1

Does anybody know something about it ?

-Denis Shamonin.