Sparse storage of attributes that deviate from their initialization value.
Number of entries stored in the sparse array.
Index array of size count that points to those accessor attributes that deviate from their initialization value. Indices must strictly increase.
Array of size count times number of components, storing the displaced accessor attributes pointed by indices. Substituted values must have the same componentType and number of components as the base accessor.
Sparse storage of attributes that deviate from their initialization value.