[vtkusers] vtkOpenGLTexture GetIndex

Ken Martin ken.martin at kitware.com
Tue Nov 1 08:54:41 EDT 2016

I'm guessing this is with the OpenGL1 backend. Looking at the code it looks
like it gets set when Load is called which in turn is called by Render. So
when the texture is rendered it will be set. Prior to then it looks like it
is initialized to zero.

On Mon, Oct 31, 2016 at 2:28 PM, Terry Farnham <terry.farnham at quanergy.com>

> I am very new to using vtk.  I am interested in getting access to the
> underlying OpenGL texture index from vtkOpenGLTexture.  Currently, when I
> initially create and load a texture, the call to GetIndex() always returns
> zero.  After rendering a frame or more, the GetIndex() appears to become
> valid and then I can make my OpenGL calls using it.  Is there an event that
> indicates when this index becomes valid, or is there some other way to know
> exactly when glGenTextures occurs so I can make my modifications?
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Ken Martin PhD
Chairman & CFO
Kitware Inc.
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