A script that creates bubbles which are blurred inside a canvas
A Pen by Linus Petren on CodePen.
Created
June 16, 2014 13:55
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A Pen by Linus Petren.
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| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <canvas id="bubbles"></canvas> | |
| </body> | |
| </html> |
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| var canvas = document.getElementById('bubbles'), | |
| context, | |
| colors = new Array('#bf956f', '#bf956f', '#b96b6b', '#6c6164', '#31c3d9', '#f9ca6b'), | |
| directions = new Array('up', 'down'), | |
| background, | |
| windowWidth = window.innerWidth, | |
| windowHeight = window.innerHeight, | |
| bubbles = new Array(); | |
| canvas.style.width= windowWidth + "px"; | |
| canvas.style.height= windowHeight + "px"; | |
| if(canvas.getContext('2d')){ | |
| context = canvas.getContext('2d'); | |
| canvas.width = windowWidth; | |
| canvas.height = windowHeight; | |
| for(var i = 0; i < 20; i++){ | |
| setBubble(true); | |
| } | |
| } | |
| function setBubble(init){ | |
| var bubble = { | |
| centerX : Math.floor((Math.random() * (windowWidth - 0) + 0)), | |
| centerY : Math.floor((Math.random() * (windowHeight - 0) + 0)), | |
| radius : Math.floor((Math.random() * (400 - 10) + 10)), | |
| color : colors[Math.floor(Math.random() * (6))], | |
| speed : (Math.random() * (2)) / 300 | |
| } | |
| if(init) | |
| bubble.direction = directions[Math.floor(Math.random() * (2))]; | |
| else | |
| bubble.direction = 'up'; | |
| if(bubble.direction == 'up') | |
| bubble.alpha = 0.0; | |
| else | |
| bubble.alpha = 0.9; | |
| bubbles.push(bubble); | |
| } | |
| window.requestAnimFrame = (function() { | |
| return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame | |
| })(); | |
| function animate() { | |
| requestAnimFrame(animate); | |
| draw(); | |
| } | |
| function draw() { | |
| context.clearRect(0,0,windowWidth,windowHeight) | |
| context.save(); | |
| for(var i = 0; i < bubbles.length; i++){ | |
| context.globalAlpha = bubbles[i].alpha; | |
| context.beginPath(); | |
| context.arc(bubbles[i].centerX, bubbles[i].centerY, bubbles[i].radius, 0, 2 * Math.PI, false); | |
| context.fillStyle = bubbles[i].color; | |
| context.fill(); | |
| if(bubbles[i].direction == 'up'){ | |
| bubbles[i].alpha += bubbles[i].speed; | |
| if(bubbles[i].alpha >= 0.9) | |
| bubbles[i].direction = 'down' | |
| } | |
| else{ | |
| bubbles[i].alpha -= bubbles[i].speed; | |
| if(bubbles[i].alpha <= 0){ | |
| bubbles.splice(i, 1); | |
| setBubble(false) | |
| } | |
| } | |
| } | |
| context.restore(); | |
| } | |
| animate(); | |
| window.onresize = function(event) { | |
| windowWidth = window.innerWidth; | |
| windowHeight = window.innerHeight; | |
| canvas.style.width= windowWidth + "px"; | |
| canvas.style.height= windowHeight + "px"; | |
| canvas.width = windowWidth; | |
| canvas.height = windowHeight; | |
| } |
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| body{ | |
| width: 0px; | |
| padding: 0px; | |
| background: #f6dfb0; | |
| } | |
| #bubbles{ | |
| position: absolute; | |
| left: 0px; | |
| top: 0px; | |
| -webkit-filter: blur(30px); | |
| -moz-filter: blur(10px); | |
| -o-filter: blur(10px); | |
| -ms-filter: blur(10px); | |
| filter: blur(10px); | |
| } |
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