Created
August 18, 2024 06:32
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| <body> | |
| <script> | |
| const width = 1600 | |
| const height = 900 | |
| function f(x) { | |
| return 0.48+(-Math.cos(12*x+3*Math.sin(6*x-4)/4-1)*(1.1-x)+(3*x-(2*x-1)**2)*0.5)/20 | |
| } | |
| function g(x, a) { | |
| return ( | |
| Math.sin(12.4*x-a)+Math.sin(14.3*x+a)+ | |
| Math.sin(11.3*x-1.5*a)+Math.sin(9.1*x+1.5*a)+ | |
| Math.sin(10.2*x-2*a)+Math.sin(13.1*x+2*a)+ | |
| Math.sin(16.7*x-2.5*a)+Math.sin(15.7*x+2.5*a) | |
| )/80 | |
| } | |
| function fillWave(ctx, f) { | |
| ctx.beginPath() | |
| ctx.moveTo(0, 1) | |
| ctx.lineTo(0, f(0)) | |
| for (let i = 1; i <= width; i ++) { | |
| const x = i / width | |
| ctx.lineTo(x, f(x)) | |
| } | |
| ctx.lineTo(1, 1) | |
| ctx.fill() | |
| } | |
| function colorMix(a, b, t) { | |
| return a.map((x, i) => x * (1 - t) + b[i] * t) | |
| } | |
| function colorToString(color) { | |
| return `rgb(${color.map(x => Math.round(x)).join(',')})` | |
| } | |
| white = [248,248,248] | |
| blue = [65,157,191] | |
| tmax = 1 | |
| function lineSegment(ctx, x, y, w) { | |
| const cw = 0.025 | |
| const offset = 0.01 | |
| ctx.save() | |
| ctx.rotate(0.18) | |
| for (let i = 0; i < w; i++) { | |
| ctx.fillStyle = colorToString(colorMix(white, blue, tmax * Math.random())) | |
| ctx.fillRect(cw * (x + i), (2 * cw + offset) * y, cw + (i == w - 1 ? 0 : 1/width), 2 * cw) | |
| } | |
| ctx.restore() | |
| } | |
| canvas = document.createElement('canvas') | |
| document.body.appendChild(canvas) | |
| canvas.width = width | |
| canvas.height = height | |
| ctx = canvas.getContext('2d') | |
| ctx.scale(width, width) | |
| ctx.fillStyle = colorToString(white) | |
| ctx.fillRect(0, 0, 1, 1) | |
| tmax = 0.4 | |
| lineSegment(ctx, 8, 0, 8) | |
| lineSegment(ctx, 20, 0, 8) | |
| ctx.fillStyle = colorToString(colorMix(white, blue, 0.1)) | |
| fillWave(ctx, x => 0.16 + g(x, 1)) | |
| tmax = 0.5 | |
| lineSegment(ctx, 30, 0, 4) | |
| lineSegment(ctx, 8, 1, 3) | |
| lineSegment(ctx, 17, 1, 10) | |
| lineSegment(ctx, 8, 2, 12) | |
| lineSegment(ctx, 22, 2, 4) | |
| ctx.fillStyle = colorToString(colorMix(white, blue, 0.3)) | |
| fillWave(ctx, x => 0.24 + g(x, 10)) | |
| tmax = 0.8 | |
| lineSegment(ctx, 28, 1, 5) | |
| lineSegment(ctx, 27, 2, 8) | |
| lineSegment(ctx, 38, 2, 8) | |
| lineSegment(ctx, 8, 3, 8) | |
| ctx.fillStyle = colorToString(colorMix(white, blue, 0.5)) | |
| fillWave(ctx, x => 0.32 + g(x, 100)) | |
| tmax = 1 | |
| lineSegment(ctx, 19, 3, 5) | |
| lineSegment(ctx, 26, 3, 8) | |
| lineSegment(ctx, 8, 4, 5) | |
| lineSegment(ctx, 20, 4, 10) | |
| lineSegment(ctx, 8, 5, 8) | |
| lineSegment(ctx, 13, 6, 9) | |
| ctx.fillStyle = colorToString(colorMix(white, blue, 0.7)) | |
| fillWave(ctx, x => 0.4 + g(x, 1000)) | |
| tmax = 1 | |
| lineSegment(ctx, 33, 4, 5) | |
| lineSegment(ctx, 21, 5, 9) | |
| lineSegment(ctx, 34, 5, 5) | |
| lineSegment(ctx, 8, 6, 4) | |
| lineSegment(ctx, 16, 6, 3) | |
| lineSegment(ctx, 26, 6, 8) | |
| lineSegment(ctx, 8, 7, 6) | |
| lineSegment(ctx, 17, 7, 7) | |
| lineSegment(ctx, 30, 7, 8) | |
| lineSegment(ctx, 14, 8, 5) | |
| lineSegment(ctx, 25, 8, 5) | |
| ctx.fillStyle = colorToString(blue) | |
| fillWave(ctx, f) | |
| </script> |
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