The above grid shows the effect of fisheye distortion. Move the mouse to change the focal point.
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Fisheye Grid
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .background { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| path { | |
| fill: none; | |
| stroke: #333; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v2.min.js?2.8.1"></script> | |
| <script src="http://bost.ocks.org/mike/fisheye/fisheye.js?0.0.2"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| xStepsBig = d3.range(10, width, 20), | |
| yStepsBig = d3.range(10, height, 20), | |
| xStepsSmall = d3.range(0, width + 6, 6), | |
| yStepsSmall = d3.range(0, height + 6, 6); | |
| var fisheye = d3.fisheye(); | |
| var line = d3.svg.line() | |
| .x(function(d) { return d.x; }) | |
| .y(function(d) { return d.y; }); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(-.5,-.5)"); | |
| svg.append("rect") | |
| .attr("class", "background") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.selectAll(".x") | |
| .data(xStepsBig) | |
| .enter().append("path") | |
| .attr("class", "x") | |
| .datum(function(x) { return yStepsSmall.map(function(y) { return {x: x, y: y}; }); }); | |
| svg.selectAll(".y") | |
| .data(yStepsBig) | |
| .enter().append("path") | |
| .attr("class", "y") | |
| .datum(function(y) { return xStepsSmall.map(function(x) { return {x: x, y: y}; }); }); | |
| var path = svg.selectAll("path") | |
| .attr("d", line); | |
| svg.on("mousemove", function() { | |
| fisheye.center(d3.mouse(this)); | |
| d3.event.preventDefault(); | |
| path.attr("d", function(d) { return line(d.map(fisheye)); }); | |
| }); | |
| </script> |
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