Partition [0, ndim) into display dims and the three hidden-dim
groups, given the pre-resolved discrete and extend_to_all dim sets
(the data-processor derives these from the scene's dimension
metadata before dispatch).
displayDims order is preserved so axis-permuted views (e.g.
[2, 0, 1]) map output XYZ correctly; hidden dims are sorted
ascending for the marginal-Cholesky / Mahalanobis kernels.
Partition
[0, ndim)into display dims and the three hidden-dim groups, given the pre-resolved discrete and extend_to_all dim sets (the data-processor derives these from the scene's dimension metadata before dispatch).displayDims order is preserved so axis-permuted views (e.g.
[2, 0, 1]) map output XYZ correctly; hidden dims are sorted ascending for the marginal-Cholesky / Mahalanobis kernels.