[PyQt] glGetFloatv crashes application

[Phil Thompson]

> On 6 Feb 2017, at 8:46 pm, Jonatan Magnusson <jonatan.magnusson at gmail.com> wrote:
> 
> Hi
> 
> So I'm trying to build a PyQt5 app. It's a tool to display a 3D structure using OpenGL with some buttons and checkboxes to change view and what is shown.
> 
> I'm currently having problem with glGetFloatv. The app crashes without any error message everytime it is called.
> 
> I call it like this:
> 
>  gl.glGetFloatv(gl.GL_MODELVIEW_MATRIX)
> 
> The reason I need to use it is that I have a problem with loading a transformation matrix: it seems to work, but the transformation is broken, even with the identity matrix. So I wanted to see what the current matrix looked like using glGetFloatv.
> 
> Any ideas?
> 
> If the status of OpenGL in PyQt5 is a bit buggy, is there anyway to use PyOpenGL with PyQt5 instead?

I would describe the OpenGL support as very immature. Can you send me a short, complete example that demonstrates the problem?

> Another problem I'm having is that whenever there is an uncaught exception, the exception message is printed as usual, but the app also crashes ("python3 stopped unexpectedly"). This is not OpenGL related.

Any uncaught exception will abort the application.

> I'm testing on MacOS Sierra (could not get OpenGL+PyQt5 to work on Linux at all). PyQt5 version 5.7.1 installed with Homebrew. Python 3.6.0, also installed with Homebrew.

Phil