javascript
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three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
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		[page:Object3D] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			Create a non-positional ( global ) audio object.<br /><br />

			This uses the [link:https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API Web Audio API].
		</p>


		<h2>Example</h2>

		<p>
			[example:webaudio_sandbox webaudio / sandbox ]<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>Constructor</h2>


		<h3>[name]( [param:AudioListener listener] )</h3>
		<p>
		listener — (required) [page:AudioListener AudioListener] instance.
		</p>


		<h2>Properties</h2>

		<h3>[property:Boolean autoplay]</h3>
		<p>Whether to start playback automatically. Default is *false*.</p>

		<h3>[property:AudioContext context]</h3>
		<p>The [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext] of the [page:AudioListener listener] given in the constructor.</p>

		<h3>[property:Number detune]</h3>
		<p>Modify pitch, measured in cents. +/- 100 is a semitone. +/- 1200 is an octave. Default is *0*.</p>

		<h3>[property:Array filters]</h3>
		<p>Represents an array of [link:https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode BiquadFilterNodes]. Can be used to apply a variety of low-order filters to create more complex sound effects. Filters are set via [page:Audio.setFilter] or [page:Audio.setFilters].</p>

		<h3>[property:GainNode gain]</h3>
		<p>A [link:https://developer.mozilla.org/en-US/docs/Web/API/GainNode GainNode] created
		using [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createGain AudioContext.createGain]().</p>

		<h3>[property:Boolean hasPlaybackControl]</h3>
		<p>Whether playback can be controlled using the [page:Audio.play play](),
			[page:Audio.pause pause]() etc. methods. Default is *true*.</p>

		<h3>[property:Boolean isPlaying]</h3>
		<p>Whether the audio is currently playing.</p>

		<h3>[property:AudioListener listener]</h3>
		<p>A reference to the listener object of this audio.</p>

		<h3>[property:Number playbackRate]</h3>
		<p>Speed of playback. Default is *1*.</p>

		<h3>[property:Number startTime]</h3>
		<p>The time at which the sound should begin to play. Same as the *when* paramter of [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/start AudioBufferSourceNode.start](). Default is *0*.</p>

		<h3>[property:Number offset]</h3>
		<p>An offset to the time within the audio buffer that playback should begin. Same as the *offset* paramter of [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/start AudioBufferSourceNode.start](). Default is *0*.</p>

		<h3>[property:Number duration]</h3>
		<p>Overrides the duration of the audio. Same as the *duration* paramter of [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/start AudioBufferSourceNode.start](). Default is *undefined* to play the whole buffer.</p>

		<h3>[property:String source]</h3>
		<p>An [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode AudioBufferSourceNode] created
		using [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createBufferSource AudioContext.createBufferSource]().</p>

		<h3>[property:String sourceType]</h3>
		<p>Type of the audio source. Default is string 'empty'.</p>

		<h3>[property:String type]</h3>
		<p>String denoting the type, set to 'Audio'.</p>


		<h2>Methods</h2>

		<h3>[method:Audio connect]()</h3>
		<p>
		Connect to the [page:Audio.source]. This is used internally on initialisation and when
		setting / removing filters.
		</p>

		<h3>[method:Audio disconnect]()</h3>
		<p>
		Disconnect from the [page:Audio.source]. This is used internally when
		setting / removing filters.
		</p>

		<h3>[method:BiquadFilterNode getFilter]()</h3>
		<p>
		Returns the first element of the [page:Audio.filters filters] array.
		</p>

		<h3>[method:Array getFilters]()</h3>
		<p>
		Returns the [page:Audio.filters filters] array.
		</p>

		<h3>[method:Boolean getLoop]()</h3>
		<p>
		Return the value of [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/loop source.loop]
		 (whether playback should loop).
		</p>

		<h3>[method:GainNode getOutput]()</h3>
		<p>
		Return the [page:Audio.gain gainNode].
		</p>

		<h3>[method:Float getPlaybackRate]()</h3>
		<p>
		Return the value of [page:Audio.playbackRate playbackRate].
		</p>

		<h3>[method:Float getVolume]( value )</h3>
		<p>
		Return the current volume.
		</p>

		<h3>[method:Audio play]()</h3>
		<p>
		If [page:Audio.hasPlaybackControl hasPlaybackControl] is true, starts playback.
		</p>

		<h3>[method:Audio pause]()</h3>
		<p>
		If [page:Audio.hasPlaybackControl hasPlaybackControl] is true, pauses playback.
		</p>

		<h3>[method:null onEnded]()</h3>
		<p>
		Called automatically when playback finished. Sets If [page:Audio.isPlaying isPlaying] to false.
		</p>

		<h3>[method:Audio setBuffer]( audioBuffer )</h3>
		<p>
		Setup the [page:Audio.source source] to the audioBuffer, and sets [page:Audio.sourceType sourceType] to 'buffer'.<br />
		If [page:Audio.autoplay autoplay], also starts playback.
		</p>

		<h3>[method:Audio setFilter]( filter )</h3>
		<p>
		Applies a single [link:https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode BiquadFilterNode] to the audio.
		</p>

		<h3>[method:Audio setFilters]( [param:Array value] )</h3>
		<p>
		value - arrays of filters.<br />
		Applies an array of [link:https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode BiquadFilterNodes] to the audio.
		</p>

		<h3>[method:Audio setLoop]( [param:Boolean value] )</h3>
		<p>
		Set [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/loop source.loop] to *value*
		(whether playback should loop).
		</p>

		<h3>[method:Audio setMediaElementSource]( mediaElement )</h3>
		<p>
		Applies the given object of type [link:https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement HTMLMediaElement] as the source of this audio.<br />
		Also sets [page:Audio.hasPlaybackControl hasPlaybackControl] to false.

		</p>

		<h3>[method:Audio setNodeSource]( audioNode )</h3>
		<p>
		Setup the [page:Audio.source source] to the audioBuffer, and sets [page:Audio.sourceType sourceType] to 'audioNode'.<br />
		Also sets [page:Audio.hasPlaybackControl hasPlaybackControl] to false.

		</p>

		<h3>[method:Audio setPlaybackRate]( [param:Float value] )</h3>
		<p>
		If [page:Audio.hasPlaybackControl hasPlaybackControl] is enabled, set the [page:Audio.playbackRate playbackRate] to *value*.
		</p>

		<h3>[method:Audio setVolume]( [param:Float value] )</h3>
		<p>
		Set the volume.
		</p>

		<h3>[method:Audio stop]()</h3>
		<p>
		If [page:Audio.hasPlaybackControl hasPlaybackControl] is enabled, stops playback,
		resets [page:Audio.startTime startTime] to *0* and sets [page:Audio.isPlaying isPlaying] to false.
		</p>

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
		</p>
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