Created
February 26, 2015 19:48
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Tech circle generator
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| <html> | |
| <head> | |
| </head> | |
| <canvas id="c" width="800", height="600" style="display: none"></canvas> | |
| <img id="kep"> | |
| <button id="f5">F5</button> | |
| <script> | |
| function newCircle(ctx){ | |
| ctx.beginPath(); | |
| ctx.lineWidth = Math.random()*20; | |
| alpha = parseInt(Math.random()*2, 10) == 0 ? 0.1 : 1; | |
| ctx.strokeStyle = 'rgba(1, 1, 1, '+alpha+')'; | |
| ctx.arc(w/2, h/2, Math.random()*100+30, Math.random()*Math.PI*2, Math.random()*Math.PI*2); | |
| ctx.stroke(); | |
| } | |
| var c = document.getElementById("c"); | |
| var h = c.height; | |
| var w = c.width; | |
| var ctx=c.getContext("2d"); | |
| for(i=15; i--;){ | |
| newCircle(ctx); | |
| } | |
| var kep = document.getElementById("kep"); | |
| png = c.toDataURL(); | |
| kep.src = png; | |
| button = document.getElementById("f5"); | |
| button.onclick = function(){ | |
| ctx.clearRect(0, 0, w, h); | |
| for(i=15; i--;){ | |
| newCircle(ctx); | |
| } | |
| png = c.toDataURL(); | |
| kep.src = png; | |
| } | |
| </script> | |
| </html> |
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