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moving legenda binded to axis, no idea how to do it, anyone help?

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Hi all. I have this axis and the legenda binded to it. I need to keep the legenda readable however I move my point of view. Im'' pretty new to openGL and I don''t know what should be the right approach, so if anyone can help... Even "look here" or "look there" is welcome Thx

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Billboarding is making a quad always face the camera. This is done by extracting the up and right vectors from the modelview matrix and multiplying them by the x and y sizes of your quad. I''m not on my own pc at the moment, so i can''t give you any code, but hopefully you will understand what i mean.

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