javascript
/
three.js
kopia lustrzana https://github.com/tazdij/three.js.git


			
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		<h1>[name]</h1>

		<p class="desc">
			创建AudioAnalyser对象, 使用[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode]
			去分析音频数据.<br /><br />

			使用了 [link:https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API Web Audio API].

		</p>

		<h2>代码示例</h2>

		<code>
		// create an AudioListener and add it to the camera
		var listener = new THREE.AudioListener();
		camera.add( listener );

		// create an 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();
		});

		// create an AudioAnalyser, passing in the sound and desired fftSize
		var analyser = new THREE.AudioAnalyser( sound, 32 );

		// get the average frequency of the sound
		var data = analyser.getAverageFrequency();
		</code>

		<h2>例子</h2>

		<p>
			[example:webaudio_sandbox webaudio / sandbox ]<br />
			[example:webaudio_visualizer webaudio / visualizer ]
		</p>

		<h2>构造函数</h2>


		<h3>[name]( audio, [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize fftSize] )</h3>
		<p>
		创建[page:AudioAnalyser AudioAnalyser].
		</p>


		<h2>属性</h2>

		<h3>[property:AnalyserNode analyser]</h3>
		<p>[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode]用来分析音频数据.</p>

		<h3>[property:Integer fftSize]</h3>
		<p>
		2的幂次方最高为2048, 用来表示确定频域的FFT (傅立叶变换)大小.
		这个[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize page]有详细信息.
		</p>

		<h3>[property:Uint8Array data]</h3>
		<p>
		用来分析数据的Uint8Array的大小由[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/frequencyBinCount analyser.frequencyBinCount]
		确定.
		</p>


		<h2>方法</h2>


		<h3>[method:Uint8Array getFrequencyData]()</h3>
		<p>
		使用网络音频的[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteFrequencyData getByteFrequencyData] 方法.
		看这个页面.
		</p>

		<h3>[method:Number getAverageFrequency]()</h3>
		<p>
		通过方法[page:AudioAnalyser.getFrequencyData getFrequencyData]获取平均频率.
		</p>

		<h2>源码</h2>

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