[Bug 785980] gst_gl_get_affine_transformation_meta_as_ndc (_ext) should use column major matrix

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=785980

Matthew Waters (ystreet00) <ystreet00 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |ystreet00 at gmail.com

--- Comment #2 from Matthew Waters (ystreet00) <ystreet00 at gmail.com> ---
You are correct for the column major thing (which requires reversing all the
matrix multiplications (once our matrix multiplication is correct :( )) however
inverting the z-axis is not necessary.  NDC is also a left-handed coordinate
system so there's no need to invert any axes.

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