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Karan 2021-11-25 20:04:52 +05:30 committed by GitHub
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Chapter 13/matrix effect
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<!doctype html>
<html>
<head>
<title>Canvas HTML5</title>
</head>
<body>
<div class="output"></div>
<script>
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
canvas.setAttribute("width", "500");
canvas.setAttribute("height", "300");
document.body.prepend(canvas);
const colVal = [];
for(let x=0;x<50;x++){
colVal.push(0);
}
function matrix() {
ctx.fillStyle = "rgba(0,0,0,.05)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = "green";
colVal.map((posY, index) => {
let output = Math.random()<0.5?0:1;
let posX = (index * 10) + 10;
ctx.fillText(output, posX, posY);
if (posY > 100 + Math.random() * 300) {
colVal[index] = 0;
} else {
colVal[index] = posY + 10;
}
})
}
setInterval(matrix, 50);
</script>
</body>
</html>