html--瀑布效果

瀑布效果

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;
  }
}




	
	
    

        
 
    
	




+!~-(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  w + 200 || wave.x  h + 200) {
        wave.x = w / 2;
        wave.y = h / 2;
        wave.speed = 0.01 + Math.random() / 10;
      }
    }
    if (parts.length  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  w + 50 || part.x