js实现发光粒子液态流动动画效果代码-html代码-BFW代码库

js实现发光粒子液态流动动画效果代码

代码语言：html

所属分类：粒子

代码描述：js实现发光粒子液态流动动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">


</head>
<body>

<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/simplex-noise.min.js"></script>
<script>
    "use strict";var

PI = Math.PI,cos = Math.cos,sin = Math.sin,abs = Math.abs,sqrt = Math.sqrt,pow = Math.pow,floor = Math.floor,round = Math.round,random = Math.random,atan2 = Math.atan2;
var HALF_PI = 0.5 * PI;
var TAU = 2 * PI;
var TO_RAD = PI / 180;
var rand = function rand(n) {return n * random();};
var randIn = function randIn(min, max) {return rand(max - min) + min;};
var randRange = function randRange(n) {return n - rand(2 * n);};
var fadeIn = function fadeIn(t, m) {return t / m;};
var fadeOut = function fadeOut(t, m) {return (m - t) / m;};
var fadeInOut = function fadeInOut(t, m) {
	var hm = 0.5 * m;
	return abs((t + hm) % m - hm) / hm;
};
var dist = function dist(x1, y1, x2, y2) {return sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2));};
var angle = function angle(x1, y1, x2, y2) {return atan2(y2 - y1, x2 - x1);};
var lerp = function lerp(n1, n2, speed) {return (1 - speed) * n1 + speed * n2;};

var particleCount = 1000;
var spawnRadius = 100;
var noiseSteps = 6;

var canvas = void 0;
var ctx = void 0;
var center = void 0;
var tick = void 0;
var simplex = void 0;
var positions = void 0;
var velocities = void 0;
var lifeSpans = void 0;
var sizes = void 0;
var hues = void 0;
var speeds = void 0;

function setup() {
	tick = 0;
	center = [];
	createCanvas();
	createParticles();
	draw();
}

function createParticles() {
	simplex = new SimplexNoise();
	positions = new Float32Array(particleCount * 2);
	velocities = new Float32Array(particleCount * 2);
	lifeSpans = new Float32Array(particleCount * 2);
	speeds = new Float32Array(particleCount);
	hues = new Float32Array(particleCount);
	sizes = new Float32Array(particleCount);

	var i = void 0;

	for (i = 0; i < particleCount * 2; i += 2) {
		initParticle(i);
	}
}

function initParticle(i) {
	var iy = void 0,ih = void 0,rd = void 0,rt = void 0,cx = void 0,sy = void 0,x = void 0,y = void 0,s = void 0,rv = void 0,vx = void 0,vy = void 0,t = void 0,h = void 0,si = void 0,l = void 0,ttl = void 0;

	iy = i + 1;
	ih = 0.5 * i | 0;
	rd = rand(spawnRadius);
	rt = rand(TAU);
	cx = cos(rt);
	sy = sin(rt);
	x = center[0] + cx * rd;
	y = center[1] + sy * rd;
	rv = randIn(0.1, 1);
	s = randIn(1, 8);
	vx = rv * cx * 0.1;
	vy = rv * sy * 0.1;
	si = randIn(0.1, 1);
	h = randIn(160, 260);
	l = 0;
	ttl = randIn(50, 200);

	positions[i] = x;
	positions[iy] = y;
	velocities[i] = vx;
	velocities[iy] = vy;
	hues[ih] = h;
	sizes[ih] = si;
	speeds.........完整代码请登录后点击上方下载按钮下载查看