[vtkusers] Need help integrating VTK with an existing OpenGL application (translating glFrustum and gluLookAt calls to VTK)

[Mark Waligora]

Hey all,
I've done quite a bit of searching and reading and am having some trouble
getting started integrating VTK into my application.  I'm a new user, but
I've spent enough time looking that I don't think I'm missing anything too
obvious.

I have a fairly simple visualization application written with OpenGL.  I
want to visualize some more complicated data sets, so I wanted to write a
version that works with VTK.

My visualization application is fed in data from a motion capture system, so
right now, every time my application loop updates, it reads the data from
the mo-cap system, and updates the rendering with very specific calls to
glFrustum and gluLookAt.  The front face of the frustum volume is almost
never centered around the z axis, so I can't simulate the frustum creation
by simply providing a vtkCamera with a position, direction, and viewing
angle.  I need more control of the frustum shape than that functionality
seems to provide.

Can anyone advise me on how to create a simple vtk application with no user
control where the frustum and camera position are automatically updated by
the program every cycle of the main program loop?  From what I can tell, I
don't want to use an interactor since the user will not be interacting with
the application (the user interacts with the motion capture system, and the
application simply queries data from the motion capture system when it is
rendering).  Again, I need to be able to create frustums that aren't
centered around the z axis.

Thanks in advance!

-Mark Waligora
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