Created
April 11, 2018 14:56
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Canvas Random Circle filled with gradient generator
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| <!DOCTYPE html> | |
| <html lang=""> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <title>Title Page</title> | |
| </head> | |
| <body> | |
| <canvas id="canvas"></canvas> | |
| </body> | |
| </html> |
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| let c = document.getElementById('canvas'); | |
| let ctx = c.getContext('2d'); | |
| let i = 0; | |
| ctx.canvas.width = window.innerWidth; | |
| ctx.canvas.height = window.innerHeight; | |
| ctx.canvas.style.position = 'fixed'; | |
| let min = (canvas.width < canvas.height) ? canvas.width : canvas.height; | |
| function getRandomColor() { | |
| let letters = '0123456789ABCDEF'; | |
| let color = '#'; | |
| for (let i = 0; i < 6; i++) { | |
| color += letters[Math.floor(Math.random() * 16)]; | |
| } | |
| return color; | |
| } | |
| function drawCircle() { | |
| i++; | |
| let seed1 = Math.floor(Math.random() * 40) + 37; | |
| let seed2 = Math.floor(Math.random() * canvas.height); | |
| let seed3 = Math.floor(Math.random() * canvas.width); | |
| let primaryColor = getRandomColor(); | |
| let secondaryColor = getRandomColor(); | |
| let arc = { | |
| x: seed3 - (seed1 / 2), | |
| y: seed2 - (seed1 / 2), | |
| r: seed1 | |
| }; | |
| ctx.beginPath(); | |
| //Create gradient | |
| let gradient = ctx.createLinearGradient((seed3 - 150), arc.x, (seed3 + seed1), arc.x); | |
| gradient.addColorStop(0, primaryColor); | |
| gradient.addColorStop(1, secondaryColor); | |
| ctx.fillStyle = gradient; | |
| ctx.arc(arc.x, arc.y, arc.r, Math.PI * 0, Math.PI * 2); | |
| ctx.fill(); | |
| if (i < 6) { | |
| setTimeout(function(){ | |
| drawCircle(); | |
| }, 300); | |
| } | |
| } | |
| drawCircle(); |
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| body { | |
| width: 100%; | |
| height: 100vh; | |
| } |
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