Simple example using d3 to make a simple "wheel" with spokes which spins back and forth.
Designed to show how to use simple shapes and transforms on svgs with d3.
Built with blockbuilder.org
Last active
May 29, 2017 16:53
-
-
Save mpmckenna8/7f1f0adbf7d9ed7520b3950103e8094c to your computer and use it in GitHub Desktop.
Spinning wheel
This file contains hidden or 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.
Learn more about bidirectional Unicode characters
| license: mit |
This file contains hidden or 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.
Learn more about bidirectional Unicode characters
| <!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; } | |
| </style> | |
| </head> | |
| <body> | |
| <svg id="svger" width="200px" height="200px"></svg> | |
| <script> | |
| var svg = d3.select('svg') | |
| var margin = 20; | |
| var width = 200, // margin, | |
| height = 200 // margin; | |
| var hub = svg.append('g') | |
| .attr('transform', function(){ | |
| return "translate(" + width/2 + "," + height/2 + ")" | |
| }) | |
| .attr('class', 'hub') | |
| //d3.selectAll('.hub') | |
| hub.append('circle') | |
| .attr('cx', 0) | |
| .attr('cy', 0) | |
| .attr('r', 10) | |
| .attr('fill', 'pink') | |
| hub.append('circle') | |
| .attr('cx', 0) | |
| .attr('cy', 0) | |
| .attr('r', 90) | |
| .attr('stroke', 'red') | |
| .attr('stroke-width', 5) | |
| .attr('fill', 'none') | |
| var linelen = [0, 90]; | |
| var line = d3.line().x(function(d){ | |
| return (0) | |
| }) | |
| .y(function(d){ | |
| return (d) | |
| }) | |
| const numberSpokes = 10; | |
| for( let i = 0; i < numberSpokes; i++) { | |
| var rotation = (360/numberSpokes) * i; | |
| var spoke = hub | |
| .append('path') | |
| .datum(linelen) | |
| .attr('d', line) | |
| .attr('stroke', 'blue') | |
| .attr('transform', 'rotate(' + rotation + ')') | |
| .attr('class', 'spoke') | |
| } | |
| const alreadyTransformed = hub.attr('transform') | |
| rotateIt(false) | |
| function rotateIt(much) { | |
| //console.log(alreadyTransformed) | |
| hub.transition().duration(4000) | |
| .attr('transform', alreadyTransformed + ' rotate(' + (much ? 0 : 180) + ')' ) | |
| .on('end', function(){ | |
| rotateIt(!much) | |
| }) | |
| } | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment