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February 23, 2018 16:18
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CMYK zoom
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <script src="//d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var defs = svg.append("defs"); | |
| var background = svg.append("g") | |
| .attr("class", "dots"); | |
| // r=0 is a Chrome bug | |
| var radius = d3.scaleSqrt() | |
| .range([1e-9, 9]); | |
| var colors = [ | |
| ["yellow", 0], | |
| ["magenta", -15], | |
| ["cyan", 15], | |
| ["black", 45] | |
| ]; | |
| var patterns = defs.selectAll("pattern") | |
| .data(colors) | |
| .enter() | |
| .append("pattern") | |
| .attr("id", function(d){ | |
| return d[0]; | |
| }) | |
| .attr("patternUnits", "userSpaceOnUse") | |
| .attr("width", 18) | |
| .attr("height", 18) | |
| .append("circle") | |
| .attr("fill", function(d){ | |
| return d[0]; | |
| }) | |
| .attr("cx", 9) | |
| .attr("cy", 9); | |
| var dots = svg.append("g") | |
| .attr("class", "dots"); | |
| dots.append("rect") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("fill", "#fff"); | |
| dots.selectAll(".color") | |
| .data(colors) | |
| .enter() | |
| .append("rect") | |
| .attr("class", "color") | |
| .attr("width", width * 40) | |
| .attr("height", width * 40) | |
| .attr("x", width * -30 / 2) | |
| .attr("y", width * -30 / 2) | |
| .attr("fill", function(d){ | |
| return "url(#" + d[0] + ")"; | |
| }) | |
| .style("mix-blend-mode", "multiply") | |
| .attr("transform", function(d){ | |
| return d[1] ? "rotate(" + d[1] + " " + (width / 2) + " " + (height / 2) + ")" : null; | |
| }); | |
| zoom(0); | |
| function zoom(p) { | |
| var color = d3.interpolateRainbow(p % 1), | |
| cmyk = rgbToCmyk(d3.color(color)); | |
| patterns.transition() | |
| .duration(500) | |
| .attr("r", function(d){ | |
| return radius(cmyk[d[0]]); | |
| }) | |
| .on("end", function(){ | |
| dots.transition() | |
| .delay(500) | |
| .duration(4000) | |
| .attr("transform", "translate( " + (width / 2) + " " + (height / 2) + ") scale(0.05 0.05)") | |
| .transition() | |
| .delay(1000) | |
| .attr("transform", "translate(0 0) scale(1 1)") | |
| .on("end", function(){ | |
| zoom(p + 0.15); | |
| }); | |
| }); | |
| } | |
| function rgbToCmyk(rgb) { | |
| var r = rgb.r / 255, | |
| g = rgb.g / 255, | |
| b = rgb.b / 255, | |
| k = 1 - Math.max(r, g, b); | |
| return { | |
| cyan: (1 - r - k) / (1 - k), | |
| magenta: (1 - g - k) / (1 - k), | |
| yellow: (1 - b - k) / (1 - k), | |
| black: k | |
| }; | |
| } | |
| </script> |
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Excellent demonstration of both CMYK and D3.
For some reason, on my screen it zooms out seeming to make one colour, then "snaps" to a slightly different colour (�for example, from almost salmon to a magenta).