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forked from jonsadka's block: Hexagram (Inner Lines)
forked from jonsadka's block: Hexagram (No Inner Lines)
forked from jonsadka's block: Animated Hexagram (No Inner Lines)
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March 10, 2017 02:55
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Animated Hexagram (Inner Lines)
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { | |
| background-color: #164677; | |
| margin:0; position:fixed; top:0; right:0; bottom:0; left:0; | |
| } | |
| .parent-container { | |
| position: relative; | |
| } | |
| .pattern-container { | |
| position: absolute; | |
| width: 100%; | |
| height: 500px; | |
| } | |
| /* Perimeted of one star is 129 */ | |
| .pattern { | |
| fill: none; | |
| stroke: #2067AC; | |
| stroke-dasharray: 129, 129; | |
| stroke-dashoffset: 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="parent-container"> | |
| <div class="pattern-container"> | |
| <svg width="100%" height="100%"> | |
| <defs> | |
| <pattern id="Pattern" x="0" y="0" width="40" height="40" patternUnits="userSpaceOnUse"> | |
| <path class="pattern point-up" d="M0 10,20 40,40 10Z" /> | |
| <path class="pattern point-down" d="M0 30,20 0,40 30Z"/> | |
| </pattern> | |
| </defs> | |
| <rect fill="url(#Pattern)" width="100%" height="100%"/> | |
| </svg> | |
| </div> | |
| </div> | |
| </body> | |
| <script> | |
| let upperThreshold = 129 + 129; | |
| const lowerThreshold = 0; | |
| const increment = 5; | |
| let reset = false; | |
| setInterval(() => { | |
| const patterns = document.getElementsByClassName('pattern'); | |
| for (let i = 0; i < patterns.length; i++) { | |
| const pattern = patterns[i]; | |
| var previousStrokeDashOffset = +pattern.style['stroke-dashoffset']; | |
| if (previousStrokeDashOffset > upperThreshold) { | |
| reset = true; | |
| } else { | |
| reset = false | |
| } | |
| reset ? | |
| pattern.style['stroke-dashoffset'] = lowerThreshold: | |
| pattern.style['stroke-dashoffset'] = previousStrokeDashOffset += increment * Math.random() * 2; | |
| } | |
| }, 40) | |
| </script> | |
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