Splats · interface

SplatSortScratch

The arrays a sort reuses, allocated once by the caller.

interface SplatSortScratch

import type { SplatSortScratch } from '@driftengine/splats';

In depth

A sort allocates nothing, which is the whole reason this is a parameter rather than a local: the two histograms are 384 KB between them, and a capture re-sorts whenever the view turns. Doing that in a worker does not make an allocation free — it makes it somebody else's garbage.

Properties

Name	Type	Description
`keys`readonly	`Uint16Array`	The depth bucket of each splat, carried from the counting pass to the scatter.
`counts`readonly	`Uint32Array`	The depth histogram, then the prefix sum over it.
`sizes`readonly	`Uint16Array`	The size bucket of each splat, overwritten by the counting pass with whether it survived.
`sizeCounts`readonly	`Uint32Array`	The size histogram, walked from the top to find the budget's threshold.
`bits`readonly	`Float32Array`	Two views of one four-byte buffer, for reading a float's bits without allocating a view. More A pair rather than a `DataView` because this is read once per splat per sort and the typed pair is one store and one load. It is in the scratch rather than at module scope for the same reason everything else here is: the sort is stringified into a worker and closes over nothing.
`bitsAsUint`readonly	`Uint32Array`