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/** @page RequiredExtensions Functionality requiring specific OpenGL version or extensions
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The engine is meant to be run on OpenGL 3 capable hardware, but most of the
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functionality is working in OpenGL 2.1 hardware too (i.e. integrated Intel
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GPUs), unless stated otherwise. Following are lists of functionality requiring
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specific OpenGL version. In most cases it is also specified which extension is
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required for given functionality, so if given hardware supports required
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extension, it doesn't need to have required OpenGL version too (e.g.
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`APPLE_vertex_array_object` is supported on Intel GPUs even if they are
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capable of OpenGL 2.1 only).
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- @subpage RequiresGL30
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- @subpage RequiresGL31
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- @subpage RequiresGL32
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- @subpage RequiresGL33
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- @subpage RequiresGL40
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- @subpage RequiresGL41
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- @subpage RequiresGL42
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- @subpage RequiresExtension
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@page RequiresGL30 Functionality requiring OpenGL 3.0
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@page RequiresGL31 Functionality requiring OpenGL 3.1
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@page RequiresGL32 Functionality requiring OpenGL 3.2
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@page RequiresGL33 Functionality requiring OpenGL 3.3
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@page RequiresGL40 Functionality requiring OpenGL 4.0
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@page RequiresGL41 Functionality requiring OpenGL 4.1
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@page RequiresGL42 Functionality requiring OpenGL 4.2
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@page RequiresExtension Functionality requiring specific OpenGL extension
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*/
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