Animated cover art for Vanilla's "Origin" https://www.youtube.com/watch?v=lSU1eFxgr68
A Pen by Dave Kwiatkowski on CodePen.
Created
May 23, 2020 17:17
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Vanilla - Origin
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| canvas |
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| let t = 0; | |
| const colors = ["#161616", "#cf894c", "#c74962"]; | |
| const canvas = document.getElementsByTagName("canvas")[0]; | |
| const ctx = canvas.getContext("2d"); | |
| const drawLine = (i, sz) => { | |
| const ym = (canvas.height - sz) / 2; | |
| const y0 = canvas.height / 2; | |
| const y = (t + i) % (sz / 2); | |
| const h = ((y / ym) * sz) / 40; | |
| ctx.beginPath(); | |
| ctx.fillStyle = colors[0]; | |
| ctx.fillRect(0, y + y0, canvas.width - 1, h); | |
| }; | |
| const drawLines = (sz) => { | |
| const n = 9; | |
| for (let i = 0; i < n; ++i) drawLine((sz / 2 / n) * i, sz); | |
| }; | |
| const drawGradient = (sz) => { | |
| const x0 = (canvas.width - sz) / 2; | |
| const y0 = (canvas.height - sz) / 2; | |
| const y1 = (canvas.height + sz) / 2; | |
| const gradient = ctx.createLinearGradient(x0, y0, x0, y1); | |
| gradient.addColorStop(0, colors[1]); | |
| gradient.addColorStop(0.5, colors[1]); | |
| gradient.addColorStop(1, colors[2]); | |
| ctx.beginPath(); | |
| ctx.fillStyle = gradient; | |
| ctx.arc(canvas.width / 2, canvas.height / 2, sz / 2, 0, Math.PI * 2); | |
| ctx.fill(); | |
| }; | |
| const drawBackground = () => { | |
| ctx.beginPath(); | |
| ctx.fillStyle = colors[0]; | |
| ctx.fillRect(0, 0, canvas.width, canvas.height); | |
| }; | |
| const loop = () => { | |
| drawBackground(); | |
| const sz = (Math.min(canvas.width, canvas.height) / 3) * 2; | |
| drawGradient(sz); | |
| drawLines(sz); | |
| t += 0.5; | |
| requestAnimationFrame(loop); | |
| }; | |
| const handleResize = () => { | |
| canvas.width = window.innerWidth; | |
| canvas.height = window.innerHeight; | |
| }; | |
| window.onresize = handleResize; | |
| handleResize(); | |
| loop(); |
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| html, canvas, body | |
| width: 100% | |
| height: 100% | |
| content-zooming: none | |
| box-sizing: border-box |
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