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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
++
++ /*!
++ \example hellogl2
++ \title Hello GL2 Example
++ \ingroup examples-widgets-opengl
++ \examplecategory {3D}
++
++ \brief The Hello GL2 example demonstrates the basic use of the OpenGL-related classes
++ provided with Qt.
++
++ \image hellogl2-example.png {Screenshot of Window displaying a 3d object}
++
++ Qt provides the QOpenGLWidget class to enable OpenGL graphics to be rendered
++ within a standard application user interface. By subclassing this class, and
++ providing reimplementations of event handler functions, 3D scenes can be
++ displayed on widgets that can be placed in layouts, connected to other
++ objects using signals and slots, and manipulated like any other widget.
++ */