This example was created using building blocks and was used to show 100 dots of varying sizes and colors using d3.
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October 17, 2016 20:57
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Simple Dots Example
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var svg = d3.select('body').append('svg') | |
| .attr('width', width) | |
| .attr('height', height); | |
| var circle = svg.selectAll("circle") | |
| .data(new Array(45)); | |
| circle.enter().append("circle") | |
| .attr("cy", function(){ return Math.random()*height; }) | |
| .attr("cx", function(){ return Math.random()*width; }) | |
| .attr("r", function(){ return Math.random()*35;}) | |
| .attr("fill", function(){ | |
| return '#' + Math.floor(Math.random()*16777215).toString(16); | |
| }); | |
| setInterval(function(){ | |
| var randomNumber = Math.round(Math.random()*45); | |
| existingCircles = svg.selectAll("circle") | |
| .data(new Array(randomNumber)); | |
| existingCircles.transition().duration(1000) | |
| .attr("cy", function(){ return Math.random()*height; }) | |
| .attr("cx", function(){ return Math.random()*width; }) | |
| .attr('r', function(){ return Math.random()*35;}) | |
| existingCircles.enter().append("circle") | |
| .attr("cy", function(){ return Math.random()*height; }) | |
| .attr("cx", function(){ return Math.random()*width; }) | |
| .attr('r', 0) | |
| .attr("fill", function(){ | |
| return '#' + Math.floor(Math.random()*16777215).toString(16); | |
| }) | |
| .transition().duration(1000) | |
| .attr('r', function(){ return Math.random()*30;}) | |
| existingCircles.exit().remove(); | |
| }, 1200); | |
| </script> | |
| </body> | |
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