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Dot wallpaper
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| license: mit |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0;background:black; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var width = 960; | |
| var height = 500; | |
| var svg = d3.select('body').append('svg') | |
| .attr('width', width) | |
| .attr('height', height); | |
| var squareSize = 40; | |
| var position = {x: 0, y:0}; | |
| var numDots = width * height / squareSize; | |
| var dotPositions = d3.range(numDots).reduce(function(dots){ | |
| dots.push({ | |
| x: position.x, | |
| y: position.y, | |
| key: `key${position.x}-${position.y}` | |
| }); | |
| position.x += squareSize; | |
| if (position.x >= width){ | |
| position.x = 0; | |
| position.y += squareSize; | |
| } | |
| return dots; | |
| }, []) | |
| svg.selectAll('.dot').data(dotPositions, function(d){ return d.key; }) | |
| .enter().append('circle') | |
| .attr('cx', function(d){ return d.x;}) | |
| .attr('cy', function(d){ return d.y;}) | |
| .attr('class', function(d){ return `dot ${d.key}`; }) | |
| .attr('fill', 'white') | |
| .attr('fill-opacity', function(){ return Math.random();}) | |
| .style('r', 2) | |
| setInterval(function(){ | |
| svg.selectAll('.dot') | |
| .transition().duration(800) | |
| .attr('fill-opacity', function(){ | |
| var shouldTransition = !!Math.round(Math.random()); | |
| if (shouldTransition) return Math.random(); | |
| return this.getAttribute('fill-opacity'); | |
| }); | |
| }, 800) | |
| </script> | |
| </body> |
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