Distance attenuation/falloff model for 3D positional audio. 
| Enumerator | 
|---|
| NO_ATTENUATION  | No distance attenuation; sound has the same volume regardless of distance between the sound instance and the listener.  
 | 
| INVERSE_DISTANCE  | Attenuate the amplitude of the sound by the inverse distance between the sound instance and the listener according to the formula:  
gain = dmin / (dmin + r * (clamp(d, dmin, dmax) - dmin)) 
 where: 
- d is the linear distance between the sound instance and the listener,
 
- dmin = minDistance,
 
- dmax = maxDistance,
 
- r = rolloffFactor.
 
 
- Note
 - When using this attenuation model, it is recommended to use a rolloffFactor greater than or equal to 1.
  
- Warning
 - When using this attenuation model:
- minDistance must be less than or equal to maxDistance.
 
- minDistance must be greater than 0.
 
- rolloffFactor must be greater than 0. 
 
 
  
 | 
| LINEAR_DISTANCE  | Attenuate the amplitude of the sound by the linear distance between the sound instance and the listener according to the formula:  
gain = 1 - r * (clamp(d, dmin, dmax) - dmin) / (dmax - dmin) 
 where: 
- d is the linear distance between the sound instance and the listener,
 
- dmin = minDistance,
 
- dmax = maxDistance,
 
- r = rolloffFactor.
 
 
- Warning
 - When using this attenuation model:
- minDistance must be less than or equal to maxDistance.
 
- rolloffFactor must be between 0 and 1 (inclusive). 
 
 
  
 | 
| EXPONENTIAL_DISTANCE  | Attenuate the amplitude of the sound by the exponential distance between the sound instance and the listener according to the formula:  
gain = pow(clamp(d, dmin, dmax) / dmin, -r) 
 where: 
- d is the linear distance between the sound instance and the listener,
 
- dmin = minDistance,
 
- dmax = maxDistance,
 
- r = rolloffFactor.
 
 
- Note
 - When using this attenuation model, it is recommended to use a rolloffFactor greater than or equal to 1.
  
- Warning
 - When using this attenuation model:
- minDistance must be less than or equal to maxDistance.
 
- minDistance must be greater than 0.
 
- rolloffFactor must be greater than 0. 
 
 
  
 |