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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/d3/3.4.2/d3.min.js" charset="utf-8"></script> | |
| <style> | |
| body > canvas, body > svg { | |
| position: absolute; | |
| top: 0; | |
| left: 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <img id="main-pic" src="https://alicial-cors.s3.amazonaws.com/iceland-cover.jpg" crossOrigin="anonymous" style="display: none;"> | |
| <canvas id="main-canvas" width="1160" height="584"></canvas> | |
| <script> | |
| var context=document.getElementById("main-canvas").getContext("2d"); | |
| var img=document.getElementById("main-pic"); | |
| img.onload = function() { | |
| setup(); | |
| }; | |
| function setup() { | |
| context.drawImage(img,0,0); | |
| var width = img.width, | |
| height = img.height; | |
| var rawData = context.getImageData(0, 0, width, height).data; | |
| var svg = d3.select("body").append("svg:svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.on("mousemove", function() { | |
| var m = d3.mouse(this); | |
| var p = ((width * m[1]) + m[0]) * 4; | |
| var color = d3.rgb(rawData[p], rawData[p + 1], rawData[p + 2]); | |
| svg.append("svg:circle") | |
| .attr("r", random(5, 20)) | |
| .attr("cx", m[0]) | |
| .attr("cy", m[1]) | |
| .style("fill", color) | |
| .transition() | |
| .duration(random(200, 4000)) | |
| .ease("exp out") | |
| .attr("cx", m[0] + random(-width/4, width/4)) | |
| .attr("cy", m[1] + random(-height/4, height/4)) | |
| .style("fill-opacity", 1e-6) | |
| .remove(); | |
| }); | |
| } | |
| function random(min, max) { | |
| var rand = Math.random() * (max - min) + min; | |
| return Math.floor(rand); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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