Nicholas Bennett dbfc472225 Docs: Update OpenGl example docs
Updated hellogle3 and cube docs.
Made brief statements more brief, rearranged to reference examples were
suitable, added snippets.

Fixes: QTBUG-108416
Pick-to: 6.5
Change-Id: Ia86f9dc8eaa53d9f9654afe099caf3ee8c7fccee
Reviewed-by: Mats Honkamaa <mats.honkamaa@qt.io>
Reviewed-by: Rami Potinkara <rami.potinkara@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
2023-05-09 22:02:25 +00:00
..
2023-05-09 22:02:25 +00:00