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Packs each flipbook frame's window on its sheet, (u0, v0, uScale, vScale), as the four unorm16 values a particle's aParticleUVFrame holds
(u0, v0, uScale, vScale)
unorm16
aParticleUVFrame
A single frame needs no window and gets an empty array. Rotated frames aren't supported.
The flipbook frames, in frame order
Four values per frame, or an empty array for a single frame
If the frames don't all share one TextureSource.
TextureSource
Packs each flipbook frame's window on its sheet,
(u0, v0, uScale, vScale), as the fourunorm16values a particle'saParticleUVFrameholdsA single frame needs no window and gets an empty array. Rotated frames aren't supported.