Opengl errors when plotting merlin data

[Nick Draper]

This has been reported from the Merlin cabin PC Tatiana Guidi 24/02/2011

When loading the file and plotting the MERLIN instrument I get the following error messages (run number 9643):

*** Run title: quiet counts - all doors -vacuum on from 3.6e-5 mbar ***
Loading geometry cache from C:\MantidInstall\instrument\MERLIN_Definition.vtp
Load successful, Duration 2.92 seconds
OpenGL error detected in GLViewport::issueGL(): invalid enumerant
OpenGL error detected in GL3DWidget::mouseMoveEvent: invalid enumerant
OpenGL error detected in GL3DWidget::mouseMoveEvent: invalid enumerant
OpenGL error detected in TexObject::generateTexture()[delete texture] : invalid enumerant
OpenGL error detected in TexObject::generateTexture()[delete texture] : invalid enumerant
OpenGL error detected in TexObject::generateTexture()[delete texture] : invalid enumerant
OpenGL error detected in TexObject::generateTexture()[delete texture] : invalid enumerant
OpenGL error detected in TexObject::generateTexture()[delete texture] : invalid enumerantOpenGL error detected in GLViewport::issueGL(): invalid enumerant
OpenGL error detected in TexObject::generateTexture()[delete texture] : invalid enumerant
OpenGL error detected in GLViewport::issueGL(): invalid enumerant

[Russell Taylor]

AFAIK these messages, while undesirable, don't accompany any catastrphic (or possibly even noticable) behaviour - so this might not need such a high priority.

Note that in [9116] I changed the include for GL from a native one to including the Qt header, which seemed reasonable as this is a Qt widget. This was required because the Mac keeps its GL headers in a different place. The solution taken in the framework was a new header MantidGeometry/Rendering/OpenGL_Headers.h to avoid code duplication.

[Roman Tolchenov]

A possible course of the bug is mixing windows and OpenGL graphics. Stopped working on the ticket because the merlin machine will not be used for data reduction using mantid.

[Russell Taylor]

(In [9943]) This doesn't appear to help the current viewing-on-a-mac-over-X problem, but I saw the errors reported above on a clean windows machine last week and it seems like they may have started around when I changed the GL include. So change it back. Re #2542.

[Steve Williams]

It works OK on my win64 development machine, consistent with this not being a high priority issue for this release. Using MER01811 loading, show instrument, wrapped, unwrapped.

[Stuart Campbell]

This ticket has been transferred to github issue ​3389