SpatialDistanceModel
Distance model used to calculate the volume of a spatial source.
type SpatialDistanceModel = "linear" | "inverse" | "exponential";
About
Used by SpatialAttenuationOptions. The formulas are the same as the distance models of the Web Audio PannerNode, where d is the distance clamped between refDistance and maxDistance:
"linear":1 - rolloffFactor * (d - refDistance) / (maxDistance - refDistance)(rolloffFactorclamped between0and1)."inverse":refDistance / (refDistance + rolloffFactor * (d - refDistance)). Default. Sounds the most natural."exponential":(d / refDistance) ^ -rolloffFactor.
On top of that, the volume fades out with a smoothstep over the last 10% before maxDistance, so every model is actually silent at maxDistance.
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