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Snap.SVG background shapes
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| license: mit |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Snap.SVG Shapes</title> | |
| <style> | |
| body { margin: 0; background: #212428 } | |
| #shapes { position: fixed; left: 0; top: 0; width: 100%; height: 100%; } | |
| </style> | |
| </head> | |
| <body> | |
| <svg id="shapes"></svg> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/snap.svg/0.5.1/snap.svg.js"></script> | |
| <script src="shapes.js" ></script> | |
| </body> | |
| </html> |
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| (function(window, Snap, mina) { | |
| 'use strict'; | |
| const WIDTH = 1000, HEIGHT = 1000; | |
| /* shapes, each (-100 < x,y < 100) */ | |
| const SHAPE_PATHS = [ | |
| "M0,59.172702727031975A59.172702727031975,59.172702727031975 0 1,1 0,-59.172702727031975A59.172702727031975,59.172702727031975 0 1,1 0,59.172702727031975Z", | |
| "M-70.35623639735145,-23.45207879911715H-23.45207879911715V-70.35623639735145H23.45207879911715V-23.45207879911715H70.35623639735145V23.45207879911715H23.45207879911715V70.35623639735145H-23.45207879911715V23.45207879911715H-70.35623639735145Z", | |
| "M0,-97.60266103764192L56.35092262370636,0 0,97.60266103764192 -56.35092262370636,0Z", | |
| "M-52.44044240850758,-52.44044240850758L52.44044240850758,-52.44044240850758 52.44044240850758,52.44044240850758 -52.44044240850758,52.44044240850758Z", | |
| "M0,69.01550348156863L79.69223902668242,-69.01550348156863 -79.69223902668242,-69.01550348156863Z", | |
| "M0,-69.01550348156863L79.69223902668242,69.01550348156863 -79.69223902668242,69.01550348156863Z" | |
| ]; | |
| const SHAPE_COLORS = [ | |
| 'hsl(0, 100%, 50%)', | |
| 'hsl(16%, 100%, 50%)', | |
| 'hsl(33%, 100%, 50%)', | |
| 'hsl(49%, 100%, 50%)', | |
| 'hsl(66%, 100%, 50%)', | |
| 'hsl(82%, 100%, 50%)', | |
| ]; | |
| var MAX_SHAPES = 25; | |
| var paper, shapesGroup, shapeFilter, shapes = 0; | |
| function createShapeFilter() { | |
| const filter = paper.filter(` | |
| <feGaussianBlur in="SourceGraphic" stdDeviation="9" result="blurred"></feGaussianBlur> | |
| <feMerge> | |
| <feMergeNode in="blurred" /> | |
| <feMergeNode in="SourceGraphic"/> | |
| </feMerge> | |
| `); | |
| filter.attr({ x: '-50%', y: '-50%', width: '200%', height: '200%' }); | |
| return filter; | |
| } | |
| function matrix(a, size) { | |
| var offset = a * (2 * WIDTH + 2 * HEIGHT), | |
| mtx = Snap.matrix(); | |
| if (offset < WIDTH) { | |
| mtx.translate(offset, -100*size); | |
| } else { | |
| offset -= WIDTH; | |
| if (offset < HEIGHT) { | |
| mtx.translate(WIDTH+100*size, offset); | |
| } else { | |
| offset -= HEIGHT; | |
| if (offset < WIDTH) { | |
| mtx.translate(WIDTH - offset, HEIGHT+100*size); | |
| } else { | |
| offset -= WIDTH; | |
| mtx.translate(-100*size, HEIGHT - offset); | |
| } | |
| } | |
| } | |
| mtx.scale(size); | |
| return mtx; | |
| } | |
| function randomAttributes(r) { | |
| var opacity = 0.3 + (0.7 * r), | |
| size = 0.0008 * (WIDTH + HEIGHT) * (1.0 - opacity); | |
| return { | |
| transform: matrix(r, size), | |
| strokeWidth: 8/Math.pow(1+size, 3), | |
| opacity: 1//opacity | |
| }; | |
| } | |
| function spawn() { | |
| var shape = Math.floor(SHAPE_PATHS.length * Math.random()); | |
| const r0 = Math.random(), | |
| r1 = Math.random(); | |
| var element = shapesGroup.path(SHAPE_PATHS[shape]); | |
| element.attr(randomAttributes(r0)); | |
| element.attr({ | |
| fill: 'none', | |
| stroke: SHAPE_COLORS[shape], | |
| filter: shapeFilter | |
| }); | |
| shapes++; | |
| element.animate(randomAttributes(r1), 1000+10000*r1, function() { | |
| element.remove(); | |
| shapes--; | |
| fillShapes(); | |
| }); | |
| } | |
| function fillShapes() { | |
| while (shapes < MAX_SHAPES) { | |
| spawn(); | |
| } | |
| } | |
| paper = Snap("#shapes"); | |
| paper.attr({ | |
| viewBox: `0 0 ${WIDTH} ${HEIGHT}`, | |
| preserveAspectRatio: "xMidYMid slice" | |
| }); | |
| shapeFilter = createShapeFilter(); | |
| shapesGroup = paper.group(); | |
| fillShapes(); | |
| })(window, Snap, mina); |
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use viewport for relative sizing