Wwise SDK 2019.2.15

Calculated total diffraction from this path, normalized to the range [0,1] The diffraction amount is calculated from the sum of the deviation angles from a straight line, of all angles at each nodePoint.
Depending on the spatial audio initialization settings, this value is applied internally, by spatial audio, to the obstruction or built-in parameter of the emitter game object.

参照

• AkDiffractionFlags
• AkSpatialAudioInitSettings

AkSpatialAudio.h の 282 行目に定義があります。