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227 lines
4.3 KiB
227 lines
4.3 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webaudio - visualizer</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<style>
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body {
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background:#777;
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padding:0;
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margin:0;
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overflow:hidden;
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font-family: Monospace;
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}
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#info {
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position: absolute;
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z-index: 2;
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top: 0px;
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width: 100%;
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color: #ffffff;
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padding: 5px;
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font-size:13px;
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text-align:center;
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font-weight: bold;
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}
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a {
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color: #ffffff;
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}
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#overlay {
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position: absolute;
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z-index: 1;
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top: 0;
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left: 0;
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width: 100%;
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height:100%;
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display: flex;
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align-items: center;
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justify-content: center;
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opacity: 1;
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background-color: #000000;
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color: #ffffff;
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}
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#overlay > div {
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text-align: center;
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}
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#overlay > div > button {
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height: 20px;
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width: 100px;
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background: transparent;
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color: #ffffff;
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outline: 1px solid #ffffff;
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border: 0px;
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cursor: pointer;
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}
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#overlay > div > p {
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color: #777777;
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font-size: 12px;
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}
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</style>
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<script src="../build/three.js"></script>
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<script src="js/WebGL.js"></script>
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<script id="vertexShader" type="x-shader/x-vertex">
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varying vec2 vUv;
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void main() {
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vUv = uv;
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gl_Position = vec4( position, 1.0 );
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}
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</script>
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<script id="fragmentShader" type="x-shader/x-fragment">
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uniform sampler2D tAudioData;
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varying vec2 vUv;
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void main() {
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vec3 backgroundColor = vec3( 0.125, 0.125, 0.125 );
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vec3 color = vec3( 1.0, 1.0, 0.0 );
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float f = texture2D( tAudioData, vec2( vUv.x, 0.0 ) ).r;
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float i = step( vUv.y, f ) * step( f - 0.0125, vUv.y );
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gl_FragColor = vec4( mix( backgroundColor, color, i ), 1.0 );
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}
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</script>
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</head>
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<body>
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<div id="overlay">
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<div>
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<button id="startButton">Click to Play</button>
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<p>Automatic audio playback requires a user interaction.</p>
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</div>
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</div>
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<div id="container"></div>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> webaudio - visualizer |
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music by <a href="http://www.newgrounds.com/audio/listen/376737" target="_blank" rel="noopener">skullbeatz</a>
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</div>
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<script>
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if ( WEBGL.isWebGLAvailable() === false ) {
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document.body.appendChild( WEBGL.getWebGLErrorMessage() );
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}
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var scene, camera, renderer, analyser, uniforms;
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var startButton = document.getElementById( 'startButton' );
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startButton.addEventListener( 'click', init );
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function init() {
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var fftSize = 128;
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//
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var overlay = document.getElementById( 'overlay' );
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overlay.remove();
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//
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var container = document.getElementById( 'container' );
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.setClearColor( 0x000000 );
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renderer.setPixelRatio( window.devicePixelRatio );
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container.appendChild( renderer.domElement );
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scene = new THREE.Scene();
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camera = new THREE.Camera();
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//
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var listener = new THREE.AudioListener();
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var audio = new THREE.Audio( listener );
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var mediaElement = new Audio( 'sounds/376737_Skullbeatz___Bad_Cat_Maste.mp3' );
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mediaElement.loop = true;
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mediaElement.play();
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audio.setMediaElementSource( mediaElement );
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analyser = new THREE.AudioAnalyser( audio, fftSize );
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//
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uniforms = {
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tAudioData: { value: new THREE.DataTexture( analyser.data, fftSize / 2, 1, THREE.LuminanceFormat ) }
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};
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var material = new THREE.ShaderMaterial( {
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uniforms: uniforms,
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vertexShader: document.getElementById( 'vertexShader' ).textContent,
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fragmentShader: document.getElementById( 'fragmentShader' ).textContent
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} );
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var geometry = new THREE.PlaneBufferGeometry( 1, 1 );
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var mesh = new THREE.Mesh( geometry, material );
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scene.add( mesh );
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//
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window.addEventListener( 'resize', onResize, false );
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animate();
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}
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function onResize() {
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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render();
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}
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function render() {
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analyser.getFrequencyData();
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uniforms.tAudioData.value.needsUpdate = true;
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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