DriftEngineRenderer · function
temporalDenoise
Blend this frame into the history a caller reprojected, and answer how much history there is.
Explained in Hello world.
function temporalDenoise(current: readonly [number, number, number] | Float32Array, history: readonly [number, number, number] | Float32Array, neighbourhood:import { temporalDenoise } from '@driftengine/core';Parameters
| Parameter | Type | Description |
|---|---|---|
current | readonly [number, number, number] | Float32Array | |
history | readonly [number, number, number] | Float32Array | |
neighbourhood | { readonly min: readonly [number, number, number]; readonly max: readonly [number, number, number]; } | null | |
disoccluded | boolean | |
pixel | TemporalPixel | |
out | Float32Array |
In depth
history is where this pixel was last frame, already reprojected — this module does not do
that and is not the place for it. disoccluded says the reprojection landed on something that
is no longer there; neighbourhood, when supplied, is the box of colours actually around this
pixel this frame, and the history is clipped into it by temporalAa.ts's own function.
A disocclusion resets rather than blends. It is not a stale history, it is a wrong one: a character stepping away from a wall uncovers pixels whose history is the character, and blending nine parts of that is a smear of them that follows them about. Resetting leaves one frame of noise, which the spatial pass has already reduced and which is gone by the next frame.