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JS Bin // source https://jsbin.com/decayajado
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <canvas id="canvas" width="640" height="480"/> | |
| <script id="jsbin-javascript"> | |
| window.onload = function() { | |
| const canvas = document.getElementById("canvas"); | |
| const ctx = canvas.getContext("2d"); | |
| const H = canvas.height; | |
| const W = canvas.width; | |
| function drawStuff(cnt) { | |
| // const jx = (Math.random() * 4 - 2) | |
| // const jy = (Math.random() * 2) | |
| let r = 128 + Math.random() * 128 | 0 | |
| // let g = Math.random() * 255 | 0 | |
| //const r = g | |
| const g = (Math.random() > 0.5 ? 0 : 0.5*r) | 0 | |
| // let b = Math.random() * 255 | 0 | |
| let b = 0 | |
| // r=0 | |
| // g = 0 | |
| // b = 0 | |
| const R = () => Math.random() | |
| const w = R() * 100 | |
| const h = R() * 50 | |
| const a = R() | |
| const color = `rgba(${r},${g},${b},${a})` | |
| //console.log(color) | |
| const x = R() * W; | |
| const y = R() * H; | |
| const x2 = (cnt*32) % W; | |
| const y2 = (cnt*32) % H; | |
| // ctx.strokeStyle = "white" | |
| // ctx.strokeStyle = R() > 0.5 ? "black" : "white" | |
| //ctx.globalCompositeOperation = "multiply"; | |
| ctx.globalCompositeOperation = "xor"; | |
| ctx.strokeStyle = color | |
| //console.log(color, "ctx="+ ctx.strokeStyle) | |
| ctx.strokeStyle = R() > 0.5 ? "goldenrod" : "black" | |
| ctx.strokeRect(x,y,w,w) | |
| // ctx.font = '48px sans' | |
| // ctx.strokeText("Lou",x2,y2) | |
| //ctx.fillStyle = color | |
| // ctx.fillRect(x,y,w,w) | |
| } | |
| let cnt = 0 | |
| function main(...args) { | |
| window.requestAnimationFrame(main) | |
| //console.log(...args) | |
| for (i = 0; i < 100; i++) { | |
| drawStuff(cnt++) | |
| } | |
| } | |
| main(0) | |
| } | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">window.onload = function() { | |
| const canvas = document.getElementById("canvas"); | |
| const ctx = canvas.getContext("2d"); | |
| const H = canvas.height; | |
| const W = canvas.width; | |
| function drawStuff(cnt) { | |
| // const jx = (Math.random() * 4 - 2) | |
| // const jy = (Math.random() * 2) | |
| let r = 128 + Math.random() * 128 | 0 | |
| // let g = Math.random() * 255 | 0 | |
| //const r = g | |
| const g = (Math.random() > 0.5 ? 0 : 0.5*r) | 0 | |
| // let b = Math.random() * 255 | 0 | |
| let b = 0 | |
| // r=0 | |
| // g = 0 | |
| // b = 0 | |
| const R = () => Math.random() | |
| const w = R() * 100 | |
| const h = R() * 50 | |
| const a = R() | |
| const color = `rgba(${r},${g},${b},${a})` | |
| //console.log(color) | |
| const x = R() * W; | |
| const y = R() * H; | |
| const x2 = (cnt*32) % W; | |
| const y2 = (cnt*32) % H; | |
| // ctx.strokeStyle = "white" | |
| // ctx.strokeStyle = R() > 0.5 ? "black" : "white" | |
| //ctx.globalCompositeOperation = "multiply"; | |
| ctx.globalCompositeOperation = "xor"; | |
| ctx.strokeStyle = color | |
| //console.log(color, "ctx="+ ctx.strokeStyle) | |
| ctx.strokeStyle = R() > 0.5 ? "goldenrod" : "black" | |
| ctx.strokeRect(x,y,w,w) | |
| // ctx.font = '48px sans' | |
| // ctx.strokeText("Lou",x2,y2) | |
| //ctx.fillStyle = color | |
| // ctx.fillRect(x,y,w,w) | |
| } | |
| let cnt = 0 | |
| function main(...args) { | |
| window.requestAnimationFrame(main) | |
| //console.log(...args) | |
| for (i = 0; i < 100; i++) { | |
| drawStuff(cnt++) | |
| } | |
| } | |
| main(0) | |
| }</script></body> | |
| </html> |
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| window.onload = function() { | |
| const canvas = document.getElementById("canvas"); | |
| const ctx = canvas.getContext("2d"); | |
| const H = canvas.height; | |
| const W = canvas.width; | |
| function drawStuff(cnt) { | |
| // const jx = (Math.random() * 4 - 2) | |
| // const jy = (Math.random() * 2) | |
| let r = 128 + Math.random() * 128 | 0 | |
| // let g = Math.random() * 255 | 0 | |
| //const r = g | |
| const g = (Math.random() > 0.5 ? 0 : 0.5*r) | 0 | |
| // let b = Math.random() * 255 | 0 | |
| let b = 0 | |
| // r=0 | |
| // g = 0 | |
| // b = 0 | |
| const R = () => Math.random() | |
| const w = R() * 100 | |
| const h = R() * 50 | |
| const a = R() | |
| const color = `rgba(${r},${g},${b},${a})` | |
| //console.log(color) | |
| const x = R() * W; | |
| const y = R() * H; | |
| const x2 = (cnt*32) % W; | |
| const y2 = (cnt*32) % H; | |
| // ctx.strokeStyle = "white" | |
| // ctx.strokeStyle = R() > 0.5 ? "black" : "white" | |
| //ctx.globalCompositeOperation = "multiply"; | |
| ctx.globalCompositeOperation = "xor"; | |
| ctx.strokeStyle = color | |
| //console.log(color, "ctx="+ ctx.strokeStyle) | |
| ctx.strokeStyle = R() > 0.5 ? "goldenrod" : "black" | |
| ctx.strokeRect(x,y,w,w) | |
| // ctx.font = '48px sans' | |
| // ctx.strokeText("Lou",x2,y2) | |
| //ctx.fillStyle = color | |
| // ctx.fillRect(x,y,w,w) | |
| } | |
| let cnt = 0 | |
| function main(...args) { | |
| window.requestAnimationFrame(main) | |
| //console.log(...args) | |
| for (i = 0; i < 100; i++) { | |
| drawStuff(cnt++) | |
| } | |
| } | |
| main(0) | |
| } |
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