html--瀑布效果


<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>瀑布效果</title><style>
body {background: #222;color: white;overflow:hidden;
}#container {box-shadow: inset 0 1px 0 #444, 0 -1px 0 #000;height: 100vh;width: 100vw;position: absolute;left: 0;top: 0;margin: 0;will-change: transform;-webkit-transform: translateZ(0);transform: translateZ(0);
}canvas#waterfall {display: block;margin: 0 auto;width: 30%;height: 55%;will-change: transform;-webkit-transform: translateZ(0);transform: translateZ(0);
}.emma {height: 100vh;width: 100%;position: absolute;left: 0;top: 0;margin: 0;
}h1 {color: #0af;font-size: 30vw;
}canvas#surface {-webkit-animation: fade-in 3000ms forwards;animation: fade-in 3000ms forwards;display: block;left: 0;position: absolute;top: 0;z-index: -1;
}@-webkit-keyframes fade-in {0% {opacity: 0;}100% {opacity: 1;}
}@keyframes fade-in {0% {opacity: 0;}100% {opacity: 1;}
}
</style></head>
<body><div id="container"><canvas id="waterfall"></canvas><div class="emma flex"><div> </div></div></div><script type="text/javascript" src="js/pixi.min.js"></script>
<script type="text/javascript" src="js/tinycolor.min.js"></script><script type="text/javascript">
+!~-(function(PIXI, window, document, undefined) {var waterfallCanvas = function(c, cw, ch) {var _this = this;this.c = c;this.ctx = c.getContext('2d');this.cw = cw;this.ch = ch;this.particles = [];this.particleRate = 6;this.gravity = 0.15;this.init = function() {this.loop();};this.reset = function() {this.ctx.clearRect(0, 0, this.cw, this.ch);this.particles = [];};this.rand = function(rMi, rMa) {return ~~((Math.random() * (rMa - rMi + 1)) + rMi);};this.Particle = function() {var newWidth = _this.rand(1, 20);var newHeight = _this.rand(1, 45);this.x = _this.rand(10 + (newWidth / 2), _this.cw - 10 - (newWidth / 2));this.y = -newHeight;this.vx = 0;this.vy = 0;this.width = newWidth;this.height = newHeight;this.hue = _this.rand(200, 220);this.saturation = _this.rand(30, 60);this.lightness = _this.rand(30, 60);};this.Particle.prototype.update = function(i) {this.vx += this.vx;this.vy += _this.gravity;this.x += this.vx;this.y += this.vy;};this.Particle.prototype.render = function() {_this.ctx.strokeStyle = 'hsla(' + this.hue + ', ' + this.saturation + '%, ' + this.lightness + '%, .05)';_this.ctx.beginPath();_this.ctx.moveTo(this.x, this.y);_this.ctx.lineTo(this.x, this.y + this.height);_this.ctx.lineWidth = this.width / 2;_this.ctx.lineCap = 'round';_this.ctx.stroke();};this.Particle.prototype.renderBubble = function() {_this.ctx.fillStyle = 'hsla(' + this.hue + ', 40%, 40%, 1)';_this.ctx.fillStyle = 'hsla(' + this.hue + ', ' + this.saturation + '%, ' + this.lightness + '%, .3)';_this.ctx.beginPath();_this.ctx.arc(this.x + this.width / 2, _this.ch - 20 - _this.rand(0, 10), _this.rand(1, 8), 0, Math.PI * 2, false);_this.ctx.fill();};this.createParticles = function() {var i = this.particleRate;while (i--) {this.particles.push(new this.Particle());}};this.removeParticles = function() {var i = this.particleRate;while (i--) {var p = this.particles[i];if (p.y > _this.ch - 20 - p.height) {p.renderBubble();_this.particles.splice(i, 1);}}};this.updateParticles = function() {var i = this.particles.length;while (i--) {var p = this.particles[i];p.update(i);}};this.renderParticles = function() {var i = this.particles.length;while (i--) {var p = this.particles[i];p.render();}};this.clearCanvas = function() {this.ctx.globalCompositeOperation = 'destination-out';this.ctx.fillStyle = 'rgba(255,255,255,.06)';this.ctx.fillRect(0, 0, this.cw, this.ch);this.ctx.globalCompositeOperation = 'lighter';};this.loop = function() {var loopIt = function() {requestAnimationFrame(loopIt, _this.c);_this.clearCanvas();_this.createParticles();_this.updateParticles();_this.renderParticles();_this.removeParticles();};loopIt();};};var isCanvasSupported = function() {var elem = document.createElement('canvas');return !!(elem.getContext && elem.getContext('2d'));};var setupRAF = function() {var lastTime = 0;var vendors = ['ms', 'moz', 'webkit', 'o'];for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame'];}if (!window.requestAnimationFrame) {window.requestAnimationFrame = function(callback, element) {var currTime = new Date().getTime();var timeToCall = Math.max(0, 16 - (currTime - lastTime));var id = window.setTimeout(function() {callback(currTime + timeToCall);}, timeToCall);lastTime = currTime + timeToCall;return id;};}if (!window.cancelAnimationFrame) {window.cancelAnimationFrame = function(id) {clearTimeout(id);};}};if (isCanvasSupported()) {var c = document.getElementById('waterfall');var cw = c.width = Math.max(document.getElementById('waterfall').scrollWidth, document.getElementById('waterfall').offsetWidth, document.getElementById('waterfall').clientWidth, document.getElementById('waterfall').scrollWidth, document.getElementById('waterfall').offsetWidth);var ch = c.height = Math.max(document.getElementById('waterfall').scrollHeight, document.getElementById('waterfall').offsetHeight, document.getElementById('waterfall').clientHeight, document.getElementById('waterfall').scrollHeight, document.getElementById('waterfall').offsetHeight);var waterfall = new waterfallCanvas(c, cw, ch);setupRAF();waterfall.init();} /* Second plugin */var w, h, renderer, stage, waveGraphics, partGraphics, waveTexture, partTexture, waveCount, partCount, waves, parts;function init() {renderer = PIXI.autoDetectRenderer(window.innerWidth, window.innerHeight / 2, {backgroundColor: '0x' + tinycolor('hsl(200, 50%, 10%)').toHex()});stage = new PIXI.Container();waveCount = 2000;partCount = 1000;waves = [];parts = [];document.body.appendChild(renderer.view);reset();for (var i = 0; i < 300; i++) {step();}loop();}function reset() {w = window.innerWidth;h = window.innerHeight;renderer.resize(w, h);waveGraphics = null;waveTexture = null;partGraphics = null;partTexture = null;waveGraphics = new PIXI.Graphics();waveGraphics.cacheAsBitmap = true;waveGraphics.beginFill('0x' + tinycolor('hsl(200, 74%, 40%)').toHex(), 0.15);waveGraphics.drawCircle(0, 0, 20);waveGraphics.endFill();waveTexture = waveGraphics.generateTexture();partGraphics = new PIXI.Graphics();partGraphics.cacheAsBitmap = true;partGraphics.beginFill('0x' + tinycolor('hsl(200, 70%, 40%)').toHex(), 0.2);partGraphics.drawCircle(0, 0, 15);partGraphics.endFill();partTexture = partGraphics.generateTexture();}function step() {if (waves.length < waveCount) {for (var i = 0; i < 10; i++) {var wave = new PIXI.Sprite(waveTexture),scale = 0.2 + Math.random() * 0.8;wave.position.x = w / 2;wave.position.y = h / 2;wave.anchor.x = 0.5;wave.anchor.y = 0.5;wave.scale.x = scale * 10;wave.scale.y = scale * 0.5;wave.blendMode = PIXI.BLEND_MODES.SCREEN;waves.push({sprite: wave,x: wave.position.x,y: wave.position.y,vx: 0,vy: 0,angle: Math.PI / 2 + Math.random() * Math.PI + Math.PI * 1.5,speed: 0.01 + Math.random() / 10});stage.addChild(wave);}}for (var i = 0, length = waves.length; i < length; i++) {var wave = waves[i];wave.sprite.position.x = wave.x;wave.sprite.position.y = wave.y;wave.vx = Math.cos(wave.angle) * wave.speed;wave.vy = Math.sin(wave.angle) * wave.speed;wave.x += wave.vx;wave.y += wave.vy;wave.speed *= 1.01;if (wave.x > w + 200 || wave.x < -200 || wave.y > h + 200) {wave.x = w / 2;wave.y = h / 2;wave.speed = 0.01 + Math.random() / 10;}}if (parts.length < partCount) {var part = new PIXI.Sprite(partTexture),scale = 0.2 + Math.random() * 0.8,type = Math.random() > 0.5 ? 1 : 0;part.position.x = w / 2 + Math.random() * 380 - 190;part.position.y = h / 2 + 0;part.anchor.x = 0.5;part.anchor.y = 0.5;part.scale.x = type ? scale : scale * 0.5;part.scale.y = type ? scale : scale * 15;part.blendMode = PIXI.BLEND_MODES.SCREEN;parts.push({sprite: part,ox: part.position.x,oy: part.position.y,x: part.position.x,y: part.position.y,vx: 0,vy: 0,angle: (-Math.PI * 0.5) + (w / 2 - part.position.x) / 750,speed: 0.0001 + Math.random() / 50});stage.addChild(part);}for (var i = 0, length = parts.length; i < length; i++) {var part = parts[i];part.sprite.position.x = part.x;part.sprite.position.y = part.y;part.vx = Math.cos(part.angle) * part.speed;part.vy = Math.sin(part.angle) * part.speed;part.x += part.vx;part.y += part.vy;part.speed *= 1.01;if (part.x > w + 50 || part.x < -50 || part.y < -50) {part.x = part.ox;part.y = part.oy;part.speed = 0.01 + Math.random() / 50;}}renderer.render(stage);}function loop() {step();requestAnimationFrame(loop);}window.addEventListener('resize', reset);init();
})(PIXI, this, document);
</script></body>
</html>