In this infinite race, players gets higher score if they're slower or if they start with higher delay.
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November 30, 2017 12:11
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Infinite race
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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"> | |
| <title>Infinite race</title> | |
| <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; | |
| } | |
| svg text { | |
| text-anchor: middle; | |
| dominant-baseline: middle; | |
| fill: black; | |
| stroke: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| const width = window.innerWidth; | |
| const height = window.innerHeight; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| const AMOUNT = 10; | |
| const RADIUS = 0.5 * height / AMOUNT; | |
| const RACE = width - RADIUS; | |
| const MAX_DELAY = 5000; | |
| const MAX_DURATION = 5000; | |
| const delay = () => MAX_DELAY * Math.random(); | |
| const duration = () => MAX_DURATION * Math.random(); | |
| const rows = | |
| svg.selectAll('.row') | |
| .data(d3.range(AMOUNT).map(i => ({score:0}))); | |
| const enter = | |
| rows.enter() | |
| .append('g') | |
| .attr('class', 'row') | |
| .attr('transform', (d, i) => `translate(0,${RADIUS * (1+ 2 * i)})`) | |
| .append('g') | |
| .attr('class', 'player') | |
| .attr('transform', `translate(${RADIUS},0)`) | |
| enter | |
| .append('circle') | |
| .attr('r', RADIUS) | |
| .attr('fill', d3.interpolateCool(0)); | |
| enter | |
| .append('text') | |
| .attr('font-size', 0.8 * RADIUS) | |
| .text(d => d.score) | |
| let endCount = 0; | |
| let startCount = 0; | |
| let maxScore = 0; | |
| const player = d3.selectAll('.player'); | |
| const size = player.size(); | |
| player.call(forth); | |
| function updatePlayer (sel) { | |
| sel.select('circle') | |
| .attr('fill', d => d3.interpolateCool(d.score / maxScore)); | |
| sel.select('text') | |
| .text(d => d.score); | |
| } | |
| function started (d) { | |
| startCount +=1; | |
| d.score = startCount; | |
| maxScore = d3.max([d.score, maxScore]); | |
| player.call(updatePlayer); | |
| } | |
| function ended (fn) { | |
| return d => { | |
| endCount +=1; | |
| d.score += endCount; | |
| maxScore = d3.max([d.score, maxScore]); | |
| player.call(updatePlayer); | |
| if (endCount === size) { | |
| endCount = 0; | |
| startCount = 0; | |
| player.call(fn); | |
| }; | |
| } | |
| } | |
| function forth (sel) { | |
| sel.transition() | |
| .duration(duration) | |
| .delay(delay) | |
| .attr('transform', `translate(${RACE},0)`) | |
| .on('start', started) | |
| .on('end', ended(back)); | |
| } | |
| function back (sel) { | |
| sel.transition() | |
| .duration(duration) | |
| .delay(delay) | |
| .attr('transform', `translate(${RADIUS},0)`) | |
| .on('start', started) | |
| .on('end', ended(forth)); | |
| } | |
| </script> | |
| </body> |
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