Created
September 21, 2022 16:05
-
-
Save tesla3327/46a78ccf57245264d5f2edb957bc08b1 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const rand = (min, max) => min + Math.floor(Math.random() * max); | |
| class Dots { | |
| static get inputProperties() { | |
| return [ | |
| '--bg-color', | |
| '--dot-color', | |
| '--mouse-x', | |
| '--mouse-y', | |
| ]; | |
| } | |
| paint(ctx, { width, height }, properties) { | |
| const bgColor = properties.get('--bg-color').toString(); | |
| const mouseX = properties.get('--mouse-x').toString(); | |
| const mouseY = properties.get('--mouse-y').toString(); | |
| const size = 24; | |
| // Draw background colour | |
| ctx.fillStyle = bgColor; | |
| ctx.fillRect(0, 0, width, height); | |
| // Draw in dots | |
| ctx.fillStyle = 'rgba(0,0,0,0.5)'; | |
| for (let i = size / 2; i <= width; i += size) { | |
| for (let j = size / 2; j <= height; j += size) { | |
| let dotSize = 0.5; | |
| let opacity = 0.4; | |
| let green = 0; | |
| let blue = 0; | |
| if (mouseX && mouseY) { | |
| // Get distance from this point to the mouse | |
| const dist = Math.pow(mouseX - i, 2) + Math.pow(mouseY - j, 2); | |
| dotSize = Math.max(1, 2 - (dist / 10 / 1000)); | |
| const colorfactor = (dist / 500) + 50; | |
| green = rand(colorfactor, colorfactor + 100); | |
| blue = rand(colorfactor, colorfactor + 100); | |
| } | |
| ctx.fillStyle = `rgba(0,${green},${blue},${opacity})`; | |
| ctx.beginPath(); | |
| ctx.arc(i, j, dotSize, 0, Math.PI * 2); | |
| ctx.fill(); | |
| } | |
| } | |
| } | |
| } | |
| registerPaint('dots', Dots); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment