Particle system

Developer
Mikita
Size
5,454 Kb
Views
6,072
  1. Particle system Previews
  2. Particle system HTML Codes
  3. Particle system CSS Codes
  4. Particle system JS Codes

How do I make an particle system?

What is a particle system? How do you make a particle system? This script and codes were developed by Mikita on 19 January 2023, Thursday.

Particle system Previews
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Particle system - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Particle system</title> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css"> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id="canvas"></canvas> <script src="js/index.js"></script>
</body>
</html>

Particle system - Script Codes CSS Codes

body { background: #222; height: 100vh; display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-pack: center; -ms-flex-pack: center; justify-content: center; -webkit-box-align: center; -ms-flex-align: center; align-items: center;
}
canvas { background: #444; width: 400px; height: 500px;
}

Particle system - Script Codes JS Codes

(function() { var Particle, ParticleSystem, Vec2, World, _Object, test, extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; }, hasProp = {}.hasOwnProperty; Vec2 = (function() { function Vec2(x, y) { this.x = x != null ? x : 0; this.y = y != null ? y : 0; } Vec2.prototype.add = function(vec) { this.x += vec.x; this.y += vec.y; return this; }; Vec2.prototype.copy = function() { return new Vec2(this.x, this.y); }; Vec2.getRandom = function(min, max) { return new Vec2(Math.random() * (max - min) + min, Math.random() * (max - min) + min); }; return Vec2; })(); World = (function() { function World(canvas) { this.canvas = canvas; this.ctx = this.canvas.getContext('2d'); this.canvasWidth = this.canvas.width = 400; this.canvasHeight = this.canvas.height = 500; this.objects = []; this.controllable = {}; this.mouse = new Vec2(this.canvasWidth / 2, this.canvasHeight / 2); this.params = { gravity: new Vec2(0, .3) }; this.canvas.addEventListener('mousemove', ((function(_this) { return function(e) { var ref; return ref = [e.offsetX, e.offsetY], _this.mouse.x = ref[0], _this.mouse.y = ref[1], ref; }; })(this)), false); this.canvas.addEventListener('mousewheel', ((function(_this) { return function(e) { e.preventDefault(); if (_this.controllable instanceof ParticleSystem) { if (e.shiftKey) { return _this.controllable.scatter = Math.max(0, _this.controllable.scatter - e.wheelDelta / 100); } else if (e.altKey) { return _this.controllable.particleSize = Math.max(0, _this.controllable.particleSize - e.wheelDelta / 100); } else { return _this.controllable.particleLife = Math.max(1, _this.controllable.particleLife - e.wheelDelta / 10); } } }; })(this)), false); } World.prototype.addObject = function(constructor, config, controllable) { var obj; config.world = this; obj = new constructor(config); if (controllable) { obj.setControllable(); } return this.objects.push(obj); }; World.prototype.removeObject = function(index) { return this.objects.splice(index, 1); }; World.prototype.start = function() { return this.tick(); }; World.prototype.tick = function() { this.update(); this.draw(); return requestAnimationFrame(this.tick.bind(this)); }; World.prototype.update = function() { var ind, j, len, object, ref, results; ref = this.objects; results = []; for (ind = j = 0, len = ref.length; j < len; ind = ++j) { object = ref[ind]; if (object) { results.push(object.update(ind)); } } return results; }; World.prototype.draw = function() { var j, len, object, ref, results; this.ctx.clearRect(0, 0, this.canvasWidth, this.canvasHeight); this.ctx.globalAlpha = 1; ref = this.objects; results = []; for (j = 0, len = ref.length; j < len; j++) { object = ref[j]; results.push(object.draw()); } return results; }; return World; })(); _Object = (function() { function _Object(config) { var ref, ref1; this.loc = (ref = config.loc) != null ? ref : new Vec2; this.speed = (ref1 = config.speed) != null ? ref1 : new Vec2; this.world = config.world; } _Object.prototype.update = function() { if (!(this instanceof ParticleSystem)) { this.speed.add(this.world.params.gravity); } return this.loc.add(this.speed); }; _Object.prototype.notVisible = function(threshold) { return this.loc.y > this.world.canvasHeight + threshold || this.loc.y < -threshold || this.loc.x > this.world.canvasWidth + threshold || this.loc.x < -threshold; }; _Object.prototype.setControllable = function() { this.world.controllable = this; return this.loc = this.world.mouse; }; return _Object; })(); ParticleSystem = (function(superClass) { extend(ParticleSystem, superClass); function ParticleSystem(config) { var ref, ref1, ref2, ref3, ref4; ParticleSystem.__super__.constructor.call(this, config); this.particles = []; this.maxParticles = (ref = config.maxParticles) != null ? ref : 300; this.particleLife = (ref1 = config.particleLife) != null ? ref1 : 60; this.particleSize = (ref2 = config.particleSize) != null ? ref2 : 24; this.creationRate = (ref3 = config.creationRate) != null ? ref3 : 3; this.scatter = (ref4 = config.scatter) != null ? ref4 : 1.3; } ParticleSystem.prototype.addParticle = function(config) { config.system = this; config.world = this.world; return this.particles.push(new Particle(config)); }; ParticleSystem.prototype.removeParticle = function(index) { return this.particles.splice(index, 1); }; ParticleSystem.prototype.update = function() { var i, ind, j, k, len, particle, ref, ref1, results; if (!(this.particles.length > this.maxParticles)) { for (i = j = 0, ref = this.creationRate; 0 <= ref ? j <= ref : j >= ref; i = 0 <= ref ? ++j : --j) { this.addParticle({ loc: this.loc.copy(), speed: Vec2.getRandom(-this.scatter, this.scatter) }); } } ref1 = this.particles; results = []; for (ind = k = 0, len = ref1.length; k < len; ind = ++k) { particle = ref1[ind]; if (particle) { results.push(particle.update(ind)); } } return results; }; ParticleSystem.prototype.draw = function() { var j, len, particle, ref, results; ref = this.particles; results = []; for (j = 0, len = ref.length; j < len; j++) { particle = ref[j]; results.push(particle.draw()); } return results; }; return ParticleSystem; })(_Object); Particle = (function(superClass) { extend(Particle, superClass); function Particle(config) { Particle.__super__.constructor.call(this, config); this.system = config.system; this.initialLife = this.system.particleLife; this.life = this.initialLife; this.size = this.system.particleSize; } Particle.prototype.update = function(ind) { Particle.__super__.update.apply(this, arguments); this.size = Math.max(0, this.system.particleSize * (this.life-- / this.initialLife)); if (this.notVisible(100 || this.life < 0)) { return this.system.removeParticle(ind); } }; Particle.prototype.draw = function() { var grad; this.world.ctx.globalCompositeOperation = 'lighter'; this.world.ctx.globalAlpha = this.life / this.initialLife; grad = this.world.ctx.createRadialGradient(this.loc.x, this.loc.y, 0, this.loc.x, this.loc.y, this.size); grad.addColorStop(0, 'rgba(255, 255, 255, .6)'); grad.addColorStop(.3, 'rgba(255, 255, 255, .3)'); grad.addColorStop(1, 'rgba(255, 255, 255, 0)'); this.world.ctx.fillStyle = grad; this.world.ctx.beginPath(); this.world.ctx.arc(this.loc.x, this.loc.y, this.size, 0, 2 * Math.PI); return this.world.ctx.fill(); }; return Particle; })(_Object); test = new World(document.getElementById('canvas')); window.test = test; test.addObject(ParticleSystem, { loc: new Vec2(200, 400), particleSize: 30, particleLife: 55, scatter: .4 }, true); test.start();
}).call(this);
Particle system - Script Codes
Particle system - Script Codes
Home Page Home
Developer Mikita
Username MikitaLisavets
Uploaded January 19, 2023
Rating 3.5
Size 5,454 Kb
Views 6,072
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