FYI:  if you search the OSG mail archives the reasons have been
discussed in detail before this


Gordon
Product Manager 3d
__________________________________________________________
Gordon Tomlinson
Email  : gtomlinson @ overwatch.textron.com
__________________________________________________________


-----Original Message-----
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Ulrich
Hertlein
Sent: Friday, June 26, 2009 11:43 AM
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] GLSL and OSG

On 26/6/09 4:39 PM, Maxime BOUCHER wrote:
> Just a question of curiosity.
>
>   I can guess Z and Y defaults haven't been change just for fun
neither the vector column/row.
>   But I wonder which are these reasons.

The Z-up is popular in the vis-sim industry as it feels more natural to
assume X-east, Y-north, Z-up.

But it's not hard-coded or anything, just the default.  You can change
it without problems by specifying an up vector of osg::Vec3(0,1,0).

Cheers,
/ulrich

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