three.js: Control gui or play sound
时间：2021-03-04 13:32:30
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<!DOCTYPE html>
<html>
<head>
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<title>Control gui</title>
<meta content=" Three.js r95 声音调节" name="keywords">
<meta content=" Three.js r95 播放声音并调节" name="description">
<meta name="author" content="Geovin Du">
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<link rel="icon" href="/favicon.ico" />
<link rel="bookmark" href="/favicon.ico" type="image/gif" />
<script type="text/javascript" charset="UTF-8" src="../libs/three/three.js"></script>
<script type="text/javascript" charset="UTF-8" src="../libs/three/controls/TrackballControls.js"></script>
<script type="text/javascript" src="../libs/util/Stats.js"></script>
<script type="text/javascript" src="../libs/util/dat.gui.js"></script>
<script type="text/javascript" src="js/util.js"></script>
<script type="text/javascript">
function init() {
// listen to the resize events 监听窗体大小事件
window.addEventListener(‘resize‘, onResize, false);
var uniforms;
var fftSize = 0.2;
var stats = initStats();
//声音
var audioListener = new THREE.AudioListener();
// create a scene, that will hold all our elements such as objects, cameras and lights.
var scene = new THREE.Scene();
// create a camera, which defines where we‘re looking at.
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
// create a render and set the size
var renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0x000000));
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMap.enabled = true;
// create the ground plane
var planeGeometry = new THREE.PlaneGeometry(60, 20, 1, 1);
var planeMaterial = new THREE.MeshLambertMaterial({ color: 0xffffff });
var plane = new THREE.Mesh(planeGeometry, planeMaterial);
plane.receiveShadow = true;
// rotate and position the plane
plane.rotation.x = -0.5 * Math.PI;
plane.position.x = 15;
plane.position.y = 0;
plane.position.z = 0;
// add the plane to the scene
scene.add(plane);
// create a cube
var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
var cubeMaterial = new THREE.MeshLambertMaterial({ color: 0xff0000 });
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
cube.castShadow = true;
// position the cube
cube.position.x = -4;
cube.position.y = 3;
cube.position.z = 0;
// add the cube to the scene
scene.add(cube);
var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
var sphereMaterial = new THREE.MeshLambertMaterial({ color: 0x7777ff });
var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
// position the sphere
sphere.position.x = 20;
sphere.position.y = 0;
sphere.position.z = 2;
sphere.castShadow = true;
// add the sphere to the scene
scene.add(sphere);
// position and point the camera to the center of the scene
camera.position.x = -30;
camera.position.y = 40;
camera.position.z = 30;
camera.lookAt(scene.position);
// 声音add the listener to the camera
camera.add(audioListener);
// instantiate audio object
var oceanAmbientSound = new THREE.Audio(audioListener);
// add the audio object to the scene
scene.add(oceanAmbientSound);
// instantiate a loader
var loader = new THREE.AudioLoader();
// load a resource
loader.load(
// resource URL
‘../assets/audio/cow.ogg‘,
// Function when resource is loaded
function (audioBuffer) {
// set the audio object buffer to the loaded object
oceanAmbientSound.setBuffer(audioBuffer);
oceanAmbientSound.setLoop(true); // 一次
oceanAmbientSound.setVolume(0.1);
// play the audio
oceanAmbientSound.play();
//oceanAmbientSound.stop(); //停止
},
// Function called when download progresses
function (xhr) {
console.log((xhr.loaded / xhr.total * 100) + ‘% loaded‘);
},
// Function called when download errors
function (xhr) {
console.log(‘An error happened‘);
}
);
// create an AudioAnalyser, passing in the sound and desired fftSize
var analyser = new THREE.AudioAnalyser(oceanAmbientSound, 32);
//
const format = (renderer.capabilities.isWebGL2) ? THREE.RedFormat : THREE.LuminanceFormat;
uniforms = {
tAudioData: { value: new THREE.DataTexture(analyser.data, fftSize / 2, 1, format) }
};
// get the average frequency of the sound
var data = analyser.getAverageFrequency();
var listener = new THREE.AudioListener();
camera.add(listener);
//
// add subtle ambient lighting
var ambienLight = new THREE.AmbientLight(0x353535);
scene.add(ambienLight);
// add spotlight for the shadows
var spotLight = new THREE.SpotLight(0xffffff);
spotLight.position.set(-10, 20, -5);
spotLight.castShadow = true;
scene.add(spotLight);
// add the output of the renderer to the html element
document.getElementById("webgl-output").appendChild(renderer.domElement);
// call the render function
var step = 0;
var num = 0;
var controls = new function () {
this.rotationSpeed = 0.02;
this.bouncingSpeed = 0.03;
this.SoundSpeed = 0.1;
};
var gui = new dat.GUI();
gui.add(controls, ‘rotationSpeed‘, 0, 0.5);
gui.add(controls, ‘bouncingSpeed‘, 0, 0.5);
gui.add(controls, ‘SoundSpeed‘, 0, 0.5);
// attach them here, since appendChild needs to be called first
var trackballControls = initTrackballControls(camera, renderer);
var clock = new THREE.Clock();
render();
function render() {
// update the stats and the controls
trackballControls.update(clock.getDelta());
stats.update();
//声音
num += controls.SoundSpeed;
oceanAmbientSound.setVolume(num);
if (num = 0)
oceanAmbientSound.stop(); //停止
// analyser.getFrequencyData();
uniforms.tAudioData.value.needsUpdate = true;
// rotate the cube around its axes
cube.rotation.x += controls.rotationSpeed;
cube.rotation.y += controls.rotationSpeed;
cube.rotation.z += controls.rotationSpeed;
// bounce the sphere up and down
step += controls.bouncingSpeed;
sphere.position.x = 20 + (10 * (Math.cos(step)));
sphere.position.y = 2 + (10 * Math.abs(Math.sin(step)));
// render using requestAnimationFrame
requestAnimationFrame(render);
renderer.render(scene, camera);
}
//根据窗体的大小改变，有一定的算法
function onResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
}
</script>
<link rel="stylesheet" href="../css/default.css">
</head>
<body>
<div id="webgl-output"></div>
<!-- Javascript code that runs our Three.js examples -->
<script type="text/javascript">
(function () {
// your page initialization code here
// the DOM will be available here
init()
})();
</script>
</body>
</html>
//
const listener = new THREE.AudioListener();
const audio = new THREE.Audio( listener );
const file = ‘./sounds/376737_Skullbeatz___Bad_Cat_Maste.mp3‘;
if ( /(iPad|iPhone|iPod)/g.test( navigator.userAgent ) ) {
const loader = new THREE.AudioLoader();
loader.load( file, function ( buffer ) {
audio.setBuffer( buffer );
audio.play();
} );
} else {
const mediaElement = new Audio( file );
mediaElement.play();
audio.setMediaElementSource( mediaElement );
}
analyser = new THREE.AudioAnalyser( audio, fftSize );
//
const format = ( renderer.capabilities.isWebGL2 ) ? THREE.RedFormat : THREE.LuminanceFormat;
uniforms = {
tAudioData: { value: new THREE.DataTexture( analyser.data, fftSize / 2, 1, format ) }
};
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