HI Michael, On 21 October 2013 03:30, michael kapelko <[email protected]> wrote:
> Hi. > Why is it the other way around? > History :-) The OSG uses row major because it was the predominant convention used at the time of the OSG's inception, row major has the advantage that one doesn't need to transpose the vector before multiplying and data in the matrix is laid out how you would expect it. Then OpenGL adopted column major, despite still storing the matrices in row major order, now this was OK till OpenGL Shader Language came along and cemented the column major convention, but this time we already a big community using the OSG and code written to the row major convention. If I were to write a new scene graph today I'd choose column major simply to be compatible with GLSL, but with the existing OSG and community code switching would be far from t rival to switch over. Robert.
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