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Fix directional facing orientation and make rear attenuation range-based

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This commit is contained in:
Jage9
2026-02-21 19:43:28 -05:00
parent 7952324633
commit 6e70090074
1 changed files with 19 additions and 17 deletions
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36
client/src/audio/spatial.ts
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@@ -35,11 +35,28 @@ export function resolveSpatialMix(options: SpatialMixOptions): SpatialMixResult
}
const distance = Math.hypot(dx, dy);
if (distance > range) {
let effectiveRange = range;
if (options.directional?.enabled) {
const coneDeg = Math.max(1, Math.min(359, options.directional.coneDeg ?? 120));
const rearGain = Math.max(0, Math.min(1, options.directional.rearGain ?? 0.5));
const facingDeg = normalizeDegrees(options.directional.facingDeg);
// `dx/dy` are listener-relative source coords in current callers, so invert to get source->listener bearing.
const bearingDeg = bearingFromSourceToListener(-dx, -dy);
const diff = angularDifferenceDeg(facingDeg, bearingDeg);
const halfCone = coneDeg / 2;
if (diff > halfCone) {
const span = Math.max(1, 180 - halfCone);
const t = Math.max(0, Math.min(1, (diff - halfCone) / span));
const directionalFactor = 1 - t * (1 - rearGain);
effectiveRange = Math.max(0.01, range * directionalFactor);
}
}
if (distance > effectiveRange) {
return null;
}
const volumeRatio = Math.max(0, 1 - distance / range);
const volumeRatio = Math.max(0, 1 - distance / effectiveRange);
let gain = baseGain * Math.pow(volumeRatio, 2);
const clampedX = Math.max(-range, Math.min(range, dx));
let pan = Math.sin((clampedX / range) * (Math.PI / 2));
@@ -51,21 +68,6 @@ export function resolveSpatialMix(options: SpatialMixOptions): SpatialMixResult
}
}
if (options.directional?.enabled) {
const coneDeg = Math.max(1, Math.min(359, options.directional.coneDeg ?? 120));
const rearGain = Math.max(0, Math.min(1, options.directional.rearGain ?? 0.5));
const facingDeg = normalizeDegrees(options.directional.facingDeg);
const bearingDeg = bearingFromSourceToListener(dx, dy);
const diff = angularDifferenceDeg(facingDeg, bearingDeg);
const halfCone = coneDeg / 2;
if (diff > halfCone) {
const span = Math.max(1, 180 - halfCone);
const t = Math.max(0, Math.min(1, (diff - halfCone) / span));
const directionalGain = 1 - t * (1 - rearGain);
gain *= directionalGain;
}
}
return { distance, gain, pan };
}