Wwise SDK

Query information about the diffraction state for a particular listener and emitter, which has been calculated using the data provided via the spatial audio emitter API. This function can be used for debugging purposes. Returned in out_aPaths, this array contains the sound paths calculated from diffraction around a geometric edge and/or diffraction through portals connecting rooms. No paths will be returned in any of the following conditions: (1) the emitter game object has a direct line of sight to the listener game object, (2) the emitter and listener are in the same room, and the listener is completely outside the radius of the emitter, or (3) The emitter and listener are in different rooms, but there are no paths found via portals between the emitter and the listener. A single path with zero diffraction nodes is returned when all of the following conditions are met: (1) the emitter and listener are in the same room, (2) there is no direct line of sight, and (3) either the Voice's Attenuation's curve max distance is exceeded or the accumulated diffraction coefficient exceeds 1.0. This function must acquire the global sound engine lock and, therefore, may block waiting for the lock.

参见

• AkDiffractionPathInfo

参数

in_gameObjectID	The ID of the game object that the client wishes to query.
in_positionIndex	The index of the associated game object position.
out_listenerPos	Returns the position of the listener game object that is associated with the game object in_gameObjectID.
out_emitterPos	Returns the position of the emitter game object in_gameObjectID.
out_aPaths	Pointer to an array of AkDiffractionPathInfo's which will be filled on return.
io_uArraySize	The number of slots in out_aPaths, after returning the number of valid elements written.