[vtkusers] Getting back OpenGL Context after data display/visualization using VTK

[Aashish Chaudhary]

On Thu, Mar 8, 2012 at 11:36 AM, Rudra Poudel <emailrudra at yahoo.com> wrote:

> Hi All,
>
> - My application has Frame Buffer Object (FBO) for off-screen rendering (
> I used GLUT to init OpenGL Context- i.e. trick of invisible GLUT window)
> - When I display/visualize data using VTK function/class as obviously it
> take-over/create-new OpenGL context
> - Then I delete all VTK related functions/classes
> - Now when I tried to work with FBO it does-not-work/has-invalid-state.
>

Since the FBO is created in different context you cannot use it in your
glut context unless you created a shared FBO. It is bit tricky but doable.

>
> Questions,
> 1. What is the best/easiest solution to get back OpenGL Context after data
> display/visualization using VTK?
>


> 2. Might be building VTK without OpenGL support- however this looks
> impossible or ...?
>

If you are using VTK for data filtering, sources then you can build your
app where rendering is done only by your code obviously widget's wont work
then.



>
> Thank you so much,
> Rudra
>
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-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com
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