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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<base href="../../../" />
<script src="list.js"></script>
<script src="page.js"></script>
<link type="text/css" rel="stylesheet" href="page.css" />
</head>
<body>
[page:Object3D] →
<h1>[name]</h1>
<p class="desc">
[name] 用一个虚拟的[link:https://developer.mozilla.org/de/docs/Web/API/AudioListener listener]表示在场景中所有的位置和非位置相关的音效.<br />
一个three.js程序通常创建一个[name]. 它是音频实体构造函数的必须参数，比如 [page:Audio Audio] and [page:PositionalAudio PositionalAudio].<br />
大多数情况下, listener对象是camera的子对象. Camera的3D变换表示了listener的3D变换.
</p>
<h2>示例</h2>
<p>
[example:webaudio_sandbox webaudio / sandbox ]<br />
[example:webaudio_timing webaudio / timing ]<br />
[example:webaudio_visualizer webaudio / visualizer ]
</p>
<code>
// create an AudioListener and add it to the camera
var listener = new THREE.AudioListener();
camera.add( listener );
// create a global audio source
var sound = new THREE.Audio( listener );
// load a sound and set it as the Audio object's buffer
var audioLoader = new THREE.AudioLoader();
audioLoader.load( 'sounds/ambient.ogg', function( buffer ) {
sound.setBuffer( buffer );
sound.setLoop(true);
sound.setVolume(0.5);
sound.play();
});
</code>
<h2>构造函数</h2>
<h3>[name]( )</h3>
<p>
创建一个新的AudioListener.
</p>
<h2>属性</h2>
<h3>[property:AudioContext context]</h3>
<p>[page:AudioListener listener]构造函数中的[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext].</p>
<h3>[property:GainNode gain]</h3>
<p>使用[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createGain AudioContext.createGain]()创建 [link:https://developer.mozilla.org/en-US/docs/Web/API/GainNode GainNode].</p>
<h3>[property:AudioNode filter]</h3>
<p>默认为*null*.</p>
<h3>[property:Number timeDelta]</h3>
<p>Time delta value for audio entities. Use in context of [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioParam/linearRampToValueAtTime AudioParam.linearRampToValueAtTimeDefault](). Default is *0*.</p>
<h2>方法</h2>
<h3>[method:GainNode getInput]()</h3>
<p>
返回[page:AudioListener.gain gainNode].
</p>
<h3>[method:AudioListener removeFilter]()</h3>
<p>
设置[page:AudioListener.filter filter]属性为*null*.
</p>
<h3>[method:AudioNode getFilter]()</h3>
<p>
返回[page:AudioListener.filter filter]属性的值.
</p>
<h3>[method:AudioListener setFilter]( [param:AudioNode value] )</h3>
<p>
设置[page:AudioListener.filter filter] 属性的值.
</p>
<h3>[method:Float getMasterVolume]()</h3>
<p>
返回音量.
</p>
<h3>[method:AudioListener setMasterVolume]( [param:Number value] )</h3>
<p>
设置音量.
</p>
<h2>源码</h2>
<p>
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
</p>
</body>
</html>
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