[Octave-bug-tracker] [bug #49083] demo camlight fails using qt graphics_toolkit

[Rik]

Follow-up Comment #8, bug #49083 (project octave):

I think the code to check whether MULTISAMPLE is enabled is wrong.  For
example, it should be possible to use


glIsEnabled (GL_MULTISAMPLE)


to check whether the feature is turned on.

There may also be a disconnect between gl-render.cc and the GLCanvas object
created by Qt.  I checked with the GLCanvas object and it thinks MULTISAMPLE
is enabled and that the number of samples is 4.

I was using this resource:
https://www.opengl.org/sdk/docs/man2/xhtml/glGet.xml.

Also, https://www.opengl.org/wiki/Multisampling
Also,
https://www.opengl.org/discussion_boards/showthread.php/148216-redbook-multisample-example-not-work-%28GL_SAMPLE_BUFFERS-0%29



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