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webaudio_visualizer.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Verge3D webaudio - visualizer</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
<script id="vertexShader" type="x-shader/x-vertex">
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = vec4(position, 1.0);
}
</script>
<script id="fragmentShader" type="x-shader/x-fragment">
uniform sampler2D tAudioData;
varying vec2 vUv;
void main() {
vec3 backgroundColor = vec3(0.125, 0.125, 0.125);
vec3 color = vec3(1.0, 1.0, 0.0);
float f = texture2D(tAudioData, vec2(vUv.x, 0.0)).r;
float i = step(vUv.y, f) * step(f - 0.0125, vUv.y);
gl_FragColor = vec4(mix(backgroundColor, color, i), 1.0);
}
</script>
</head>
<body>
<div id="overlay">
<button id="startButton">Play</button>
</div>
<div id="container"></div>
<div id="info">
<a href="https://www.soft8soft.com/verge3d" target="_blank" rel="noopener noreferrer">Verge3D</a> webaudio - visualizer<br/>
music by <a href="http://www.newgrounds.com/audio/listen/376737" target="_blank" rel="noopener">skullbeatz</a>
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"v3d": "../build/v3d.module.js",
"v3d/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as v3d from 'v3d';
let scene, camera, renderer, analyser, uniforms;
const startButton = document.getElementById('startButton');
startButton.addEventListener('click', init);
function init() {
const fftSize = 128;
//
const overlay = document.getElementById('overlay');
overlay.remove();
//
const container = document.getElementById('container');
renderer = new v3d.WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(0x000000);
renderer.setPixelRatio(window.devicePixelRatio);
container.appendChild(renderer.domElement);
scene = new v3d.Scene();
camera = new v3d.Camera();
//
const listener = new v3d.AudioListener();
const audio = new v3d.Audio(listener);
const file = './sounds/376737_Skullbeatz___Bad_Cat_Maste.mp3';
if (/(iPad|iPhone|iPod)/g.test(navigator.userAgent)) {
const loader = new v3d.AudioLoader();
loader.load(file, function(buffer) {
audio.setBuffer(buffer);
audio.play();
});
} else {
const mediaElement = new Audio(file);
mediaElement.play();
audio.setMediaElementSource(mediaElement);
}
analyser = new v3d.AudioAnalyser(audio, fftSize);
//
const format = (renderer.capabilities.isWebGL2) ? v3d.RedFormat : v3d.LuminanceFormat;
uniforms = {
tAudioData: { value: new v3d.DataTexture(analyser.data, fftSize / 2, 1, format) }
};
const material = new v3d.ShaderMaterial({
uniforms: uniforms,
vertexShader: document.getElementById('vertexShader').textContent,
fragmentShader: document.getElementById('fragmentShader').textContent
});
const geometry = new v3d.PlaneGeometry(1, 1);
const mesh = new v3d.Mesh(geometry, material);
scene.add(mesh);
//
window.addEventListener('resize', onWindowResize);
animate();
}
function onWindowResize() {
renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
analyser.getFrequencyData();
uniforms.tAudioData.value.needsUpdate = true;
renderer.render(scene, camera);
}
</script>
</body>
</html>