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Update matrix effect

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LSvekis
2021-10-04 17:47:51 -04:00
committed by GitHub
parent f33c672d41
commit 1b8454297e
1 changed files with 19 additions and 24 deletions
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Chapter 13/matrix effect
+19 -24
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@@ -1,44 +1,39 @@
<!doctype html> <!doctype html>
<html> <html>
<head> <head>
<title>Canvas HTML5</title> <title>Canvas HTML5</title>
</head> </head>
<body> <body>
<div class="output"></div> <div class="output"></div>
<script> <script>
const canvas = document.createElement('canvas'); const canvas = document.createElement("canvas");
const ctx = canvas.getContext('2d'); const ctx = canvas.getContext("2d");
canvas.setAttribute('width', '600'); canvas.setAttribute("width", "500");
canvas.setAttribute('height', '400'); canvas.setAttribute("height", "300");
document.body.prepend(canvas); document.body.prepend(canvas);
const textPos = Array(60).join(0).split(''); const colVal = [];
console.log(textPos); for(let x=0;x<50;x++){
colVal.push(0);
}
function matrix() { function matrix() {
let output = '0'; console.log(colVal);
ctx.fillStyle = 'rgba(0,0,0,.05)'; let output = "0";
ctx.fillStyle = "rgba(0,0,0,.05)";
ctx.fillRect(0, 0, canvas.width, canvas.height); ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = 'green'; ctx.fillStyle = "green";
textPos.map((posY, index) => { colVal.map((posY, index) => {
output = String.fromCharCode(62 + Math.random() * 26); output = Math.random()<0.5?0:1;
console.log(output);
let posX = (index * 10) + 10; let posX = (index * 10) + 10;
ctx.fillText(output, posX, posY); ctx.fillText(output, posX, posY);
if (posY > 100 + Math.random() * 1000) { if (posY > 100 + Math.random() * 300) {
textPos[index] = 0; colVal[index] = 0;
}
else { } else {
textPos[index] = posY + 10; colVal[index] = posY + 10;
} }
}) })
} }
setInterval(matrix, 50); setInterval(matrix, 50);
</script> </script>
</body> </body>
</html> </html>