“使用 Three.js 实现的波浪粒子动画。大量粒子组成的动态波浪图案会和鼠标移动进行互动,效果十分炫酷。”
实现代码
HTML:
<html>
<body></body>
</html>
CSS:
body {
background-color: #193c6d;
filter: progid: DXImageTransform.Microsoft.gradient(gradientType=1, startColorstr='#003073', endColorstr='#029797');
background-image: url(//img.alicdn.com/tps/TB1d.u8MXXXXXXuXFXXXXXXXXXX-1900-790.jpg);
background-size: 100%;
background-image: -webkit-gradient(linear, 0 0, 100% 100%, color-stop(0, #003073), color-stop(100%, #029797));
background-image: -webkit-linear-gradient(135deg, #003073, #029797);
background-image: -moz-linear-gradient(45deg, #003073, #029797);
background-image: -ms-linear-gradient(45deg, #003073 0, #029797 100%);
background-image: -o-linear-gradient(45deg, #003073, #029797);
background-image: linear-gradient(135deg, #003073, #029797);
text-align: center;
margin: 0px;
overflow: hidden;
}
JAVASCRIPT:
// three.js - https://github.com/mrdoob/three.js
var SEPARATION = 100,
AMOUNTX = 100,
AMOUNTY = 70;
var container;
var camera, scene, renderer;
var particles, particle, count = 0;
var mouseX = 85,
mouseY = -342;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera(120, window.innerWidth / window.innerHeight, 1, 10000);
camera.position.z = 1000;
// 堆代码 duidaima.com
scene = new THREE.Scene();
particles = new Array();
var PI2 = Math.PI * 2;
var material = new THREE.ParticleCanvasMaterial({
color: 0xe1e1e1,
program: function(context) {
context.beginPath();
context.arc(0, 0, .6, 0, PI2, true);
context.fill();
}
});
var i = 0;
for (var ix = 0; ix < AMOUNTX; ix++) {
for (var iy = 0; iy < AMOUNTY; iy++) {
particle = particles[i++] = new THREE.Particle(material);
particle.position.x = ix * SEPARATION - ((AMOUNTX * SEPARATION) / 2);
particle.position.z = iy * SEPARATION - ((AMOUNTY * SEPARATION) / 2);
scene.add(particle);
}
}
renderer = new THREE.CanvasRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
document.addEventListener('mousemove', onDocumentMouseMove, false);
document.addEventListener('touchstart', onDocumentTouchStart, false);
document.addEventListener('touchmove', onDocumentTouchMove, false);
//
window.addEventListener('resize', onWindowResize, false);
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
//
function onDocumentMouseMove(event) {
mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
}
function onDocumentTouchStart(event) {
if (event.touches.length === 1) {
event.preventDefault();
mouseX = event.touches[0].pageX - windowHalfX;
mouseY = event.touches[0].pageY - windowHalfY;
}
}
function onDocumentTouchMove(event) {
if (event.touches.length === 1) {
event.preventDefault();
mouseX = event.touches[0].pageX - windowHalfX;
mouseY = event.touches[0].pageY - windowHalfY;
}
}
//
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
camera.position.x += (mouseX - camera.position.x) * .05;
camera.position.y += (-mouseY - camera.position.y) * .05;
camera.lookAt(scene.position);
var i = 0;
for (var ix = 0; ix < AMOUNTX; ix++) {
for (var iy = 0; iy < AMOUNTY; iy++) {
particle = particles[i++];
particle.position.y = (Math.sin((ix + count) * 0.3) * 50) + (Math.sin((iy + count) * 0.5) * 50);
particle.scale.x = particle.scale.y = (Math.sin((ix + count) * 0.3) + 1) * 2 + (Math.sin((iy + count) * 0.5) + 1) * 2;
}
}
renderer.render(scene, camera);
count += 0.1;
}
源码:https://codepen.io/deathfang/pen/WxNVoq
在线预览:https://codepen.io/deathfang/full/WxNVoq