[vtkusers] Using vtkExternalOpenGLCamera

[Sankhesh Jhaveri]

Hi,

Could you please provide more details on how you’re trying to set the
camera parameters?
The way the external camera works is that it ignores the camera position
and focal point parameters if the projection and model view matrices are
set explicitly using vtkExternalOpenGLCamera::SetProjectionMatrix() and
vtkExternalOpenGLCamera::SetModelViewTransformMatrix()

Thanks,
Sankhesh
​

On Wed, Jul 19, 2017 at 9:59 AM elainejiang8 <elainejiang8 at gmail.com> wrote:

> Hi everyone!
>
> I'm building a program that uses the externalVTKWidget to volume render an
> object in an OpenGL context. Right now, I'm calling
>
> *ren->GetActiveCamera();
> *
>
> (where ren is a vtkExternalOpenGLRenderWindow instance) in my render
> function so I can control the position and focal point of the camera.
> However, I'm unable to get the camera to actually have any effect on the
> scene. The documentation for vtkExternalOpenGLCamera is rather slim, and I
> can't find any similar examples, so I am a bit stuck on this issue.
>
> Does anyone have any insight into how I could approach this problem? Thanks
> in advance!
>
> Elaine
>
>
>
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-- 
Sankhesh Jhaveri *Sr. Research & Development Engineer* | Kitware
<http://www.kitware.com/> | (518) 881-4417
​
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