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186 lines
3.9 KiB
186 lines
3.9 KiB
3 years ago
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<!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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<link type="text/css" rel="stylesheet" href="main.css">
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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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<button id="startButton">Play</button>
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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<br/>
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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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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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let scene, camera, renderer, analyser, uniforms;
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const startButton = document.getElementById( 'startButton' );
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startButton.addEventListener( 'click', init );
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function init() {
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const fftSize = 128;
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//
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const overlay = document.getElementById( 'overlay' );
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overlay.remove();
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//
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const 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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const listener = new THREE.AudioListener();
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const audio = new THREE.Audio( listener );
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const file = './sounds/376737_Skullbeatz___Bad_Cat_Maste.mp3';
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if ( /(iPad|iPhone|iPod)/g.test( navigator.userAgent ) ) {
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const loader = new THREE.AudioLoader();
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loader.load( file, function ( buffer ) {
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audio.setBuffer( buffer );
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audio.play();
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} );
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} else {
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const mediaElement = new Audio( file );
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mediaElement.play();
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audio.setMediaElementSource( mediaElement );
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}
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analyser = new THREE.AudioAnalyser( audio, fftSize );
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//
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const format = ( renderer.capabilities.isWebGL2 ) ? THREE.RedFormat : THREE.LuminanceFormat;
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uniforms = {
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tAudioData: { value: new THREE.DataTexture( analyser.data, fftSize / 2, 1, format ) }
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};
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const 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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const geometry = new THREE.PlaneGeometry( 1, 1 );
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const mesh = new THREE.Mesh( geometry, material );
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scene.add( mesh );
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//
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window.addEventListener( 'resize', onWindowResize );
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animate();
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}
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function onWindowResize() {
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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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