docs/user_guides/schemas/usdVol/ParticleFieldPositionBaseAPI.md
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(ParticleFieldPositionBaseAPI)=
Defines a base applied schema for ParticleField position data.
The number of positions provided is also used to determine the number of
particles in a ParticleField. If no position data is present, then the
ParticleField contains no particles. Any other per-particle data, such as
scale or orientation, is adjusted to match the number of positions --
truncated if more per-particle data is provided, or discarded if the
per-particle data has fewer entries than the number of positions.
For other per-particle data fields, if no data is provided, or it is discarded
then its default value will be used.
This is a base schema that ParticleField characteristics schemas typically will have as a built-in applied schema. This allows validation to verify that an applied schema that defines position is always present for a ParticleField.
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