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Add flip_y_up_to_z_up method to Matrix4
This is for converting between models which often come in a y-up coordinate system (maya) and game which often use a z-up system.
Math from http://stackoverflow.com/questions/22571364/threejs-matrix-from-z-up-coordinate-system-to-y-up-coordinate-system
Aha, interesting! Will have to think about what the best API/naming should be
Yeah I was going back and fort a bit. Maybe something like just flip_yz is easier On Wed, Sep 14, 2016 at 8:28 PM Brendan Zabarauskas < [email protected]> wrote:
Aha, interesting! Will have to think about what the best API/naming should be
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How likely is it that there are other coordinate systems? And will we need this for the other transformation types? cc. @mhintz
I think y vs z up is the most common issue. https://www.reallusion.com/iclone/help/3dxchange5/pro/05_Export/Y_Up_or_Z_Up.htm for instance. Generally it seems like many 3D tools (but not all) use y up whereas game engines are split between them (unity uses y and unreal z) On Thu, Sep 15, 2016 at 5:01 AM Brendan Zabarauskas < [email protected]> wrote:
How likely is it that there are other coordinate systems? And will we need this for the other transformation types? cc. @mhintz https://github.com/mhintz
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