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Row-major / Column-major ordering

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Column major order is used in matrices in OpenGL.
In real matrix math the ordering is row major, so the elements go like this:

Row major (real world matrix math):

[ 0  1  2  3]
[ 4  5  6  7]
[ 8  9 10 11]
[12 13 14 15]

Column major (OpenGL uses this order):

[0  4  8   12]
[1  5  9   13]
[2  6  10  14]
[3  7  11  15]

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