Quote: The billboard is constrained so that it can only rotate about its up vector in model space. The orientation is relative to a camera, so you either provide the camerathanks.
billboards
Hy.
I'm not understand what are billboards and how they are related with particles.
I'm understand that are simil to sprites , but what mean that are always oriented to camera?
They always face the camara; meaning you never see the "back" of them, they rotate around their up-vector so they always point towards the camara.
They relate to particles in that a particle can be drawn by mapping a particle texture onto a billboard (quad) of a suitable size.
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