51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
const canvas = document.getElementById("Matrix")
|
|
const context = canvas.getContext("2d")
|
|
|
|
canvas.height = window.innerHeight + 100;
|
|
canvas.width = window.innerWidth + 5;
|
|
|
|
const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./*-+#$%^@!~?><:;[]{}=_αβΓγΔδεζηΘθικΛλμΞξΠπρΣσςτυΦφχΨψΩω×≦≧≠∞≒≡～∩∠∪∟⊿∫∮∵∴＄￥〒￠￡℃€℉╩◢ⅩⅨⅧⅦⅥⅤⅣⅢⅡⅠあいうえおがぎぐげござじずぜぞだぢつでづどにぬのばひぴぶへぺぼみゃょァゐゎè";
|
|
|
|
const fontSize = 16;
|
|
const columns = canvas.width / fontSize;
|
|
|
|
const charArr = [];
|
|
for (let i = 0; i < columns; i++) {
|
|
charArr[i] = 1;
|
|
}
|
|
|
|
let frame = 0;
|
|
let str;
|
|
|
|
context.fillStyle = "rgba(0, 0, 0, 1)";
|
|
context.fillRect(0, 0, canvas.width, canvas.height);
|
|
|
|
function Update() {
|
|
context.fillStyle = "rgba(0, 0, 0, 0.05)";
|
|
context.fillRect(0, 0, canvas.width, canvas.height);
|
|
|
|
if (frame == 0) {
|
|
let a = parseInt(Math.random() * 255);
|
|
str = `rgba(${a}, ${Math.abs(a - 127)}, ${Math.abs(a - 255)}, 0.9)`;
|
|
}
|
|
context.fillStyle = str;
|
|
context.font = fontSize + "px monospace";
|
|
|
|
for (let i = 0; i < columns; i++) {
|
|
const text = chars[Math.floor(Math.random() * chars.length)];
|
|
context.fillText(text, i * fontSize, charArr[i] * fontSize);
|
|
if (charArr[i] * fontSize > canvas.height && Math.random() > 0.90) {
|
|
charArr[i] = 0;
|
|
}
|
|
charArr[i]++;
|
|
}
|
|
|
|
frame++;
|
|
if (frame <= 40 * (Math.floor(Math.random() * 10) + 3)) {
|
|
requestAnimationFrame(Update); // 40 frames a cycle
|
|
} else {
|
|
frame = 0;
|
|
Appear();
|
|
}
|
|
}
|