AttenuationModelInverse QML Type | Qt Multimedia 5.4

- Qt 5.4
- Qt Multimedia
- QML Types
- AttenuationModelInverse QML Type
- Qt 5.4.2 Reference Documentation

# AttenuationModelInverse QML Type

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

Import Statement: | import QtAudioEngine 1.0
Since: | Qt 5.0

- List of all members, including inherited members

## Properties

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

## Detailed Description

This type is part of the QtAudioEngine 1.0 module.

AttenuationModelInverse must be defined inside AudioEngine.

    import QtQuick 2.0
    import QtAudioEngine 1.0

    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.