- Qt 5.15
- Qt Multimedia
- QML Types
- AttenuationModelInverse QML Type
- Qt 5.15.19 Reference Documentation

# AttenuationModelInverse QML Type

Defines a non-linear attenuation curve for a Sound. More...

Import Statement: | import QtAudioEngine 1.15
Since: | Qt 5.0

- List of all members, including inherited members

## Properties

- end : real
- name : string
- rolloff : real
- start : real

## Detailed Description

AttenuationModelInverse must be defined inside AudioEngine or be added to it using AudioEngine.addAttenuationModel() if AttenuationModelInverse is created dynamically.

     Rectangle {
         color:"white"
         width: 300
         height: 500

         AudioEngine {
             id:audioengine

             AttenuationModelInverse {
                name:"linear"
                start: 20
                end: 500
                rolloff: 1.5
             }

             AudioSample {
                 name:"explosion"
                 source: "explosion-02.wav"
             }

             Sound {
                 name:"explosion"
                 attenuationModel: "linear"
                 PlayVariation {
                     sample:"explosion"
                 }
             }
         }
     }

Attenuation factor is calculated as below:

distance: distance from sound to listener d = min(max(distance, start), end); attenuation = start / (start + (d - start) * rolloff);

## Property Documentation

end : real

This property holds the end distance. There will be no further attenuation if the distance from sound to listener is larger than this. The default value is 1000.

name : string

This property holds the name of AttenuationModelInverse, must be unique among all attenuation models and only defined once.

rolloff : real

This property holds the rolloff factor. The bigger the value is, the faster the sound attenuates. The default value is 1.

start : real

This property holds the start distance. There will be no attenuation if the distance from sound to listener is within this range. The default value is 1.