PannerNode.positionX

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positionX 特性为 PannerNode interface specifies the X coordinate of the audio source's position in 3D Cartesian coordinates, corresponding to the horizontal axis (left-right).

The complete vector is defined by the position of the audio source, given as ( positionX , positionY , positionZ ), and the orientation of the audio source (that is, the direction in which it's facing), given as ( orientationX , orientationY , orientationZ ).

Depending on the directionality of the sound (as specified using the attributes coneInnerAngle , coneOuterAngle ，和 codeOuterGain ), the orientation of the sound may alter the perceived volume of the sound as it's being played. If the sound is pointing toward the listener, it will be louder than if the sound is pointed away from the listener.

AudioParam contained by this property is read only; however, you can still change the value of the parameter by assigning a new value to its AudioParam.value 特性。

句法

var positionX = PannerNode.positionX;
PannerNode.positionX.value = newPositionX;

值

AudioParam whose value is the X coordinate of the audio source's position, in 3D Cartesian coordinates. The default value is 0.

范例

The following example starts an oscillator, and pans it to the left after 1 second, to the right after 2 seconds, and back to the center after 3 seconds.

const context = new AudioContext();
const osc = new OscillatorNode(context);
const panner = new PannerNode(context);
panner.positionX.setValueAtTime(-1, context.currentTime + 1);
panner.positionX.setValueAtTime(1, context.currentTime + 2);
panner.positionX.setValueAtTime(0, context.currentTime + 3);
osc.connect(panner)
   .connect(context.destination);
osc.start(0);

规范

规范	状态	注释
Web 音频 API The definition of 'positionX' in that specification.	工作草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`positionX`	Chrome Yes	Edge ≤18	Firefox 50	IE 不支持 No	Opera Yes	Safari 不支持 No	WebView Android Yes	Chrome Android Yes	Firefox Android 50	Opera Android Yes	Safari iOS 不支持 No	Samsung Internet Android Yes

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完整支持
不支持

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元数据

最后修改： 2020 年 1 月 22 日

Web 音频 API
PannerNode
构造函数
1. PannerNode()
特性
1. coneInnerAngle
2. coneOuterAngle
3. coneOuterGain
4. distanceModel
5. maxDistance
6. orientationX
7. orientationY
8. orientationZ
9. panningModel
10. positionX
11. positionY
12. positionZ
13. refDistance
14. rolloffFactor
方法
继承：
1. AudioNode
2. EventTarget
Related pages for Web Audio API

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句法

值

范例

规范

浏览器兼容性

图例

另请参阅

相关话题