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the-nexus/modules/effects/matrix-rain.js
Perplexity Computer 675b61d65e
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refactor: modularize app.js into ES module architecture
Split the monolithic 5393-line app.js into 32 focused ES modules under
modules/ with a thin ~330-line orchestrator. No bundler required — runs
in-browser via import maps.

Module structure:
  core/     — scene, ticker, state, theme, audio
  data/     — gitea, weather, bitcoin, loaders
  terrain/  — stars, clouds, island
  effects/  — matrix-rain, energy-beam, lightning, shockwave, rune-ring, gravity-zones
  panels/   — heatmap, sigil, sovereignty, dual-brain, batcave, earth, agent-board, lora-panel
  portals/  — portal-system, commit-banners
  narrative/ — bookshelves, oath, chat
  utils/    — perlin

All files pass node --check. No new dependencies.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-24 18:12:53 +00:00

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This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
// modules/effects/matrix-rain.js — 2D canvas matrix rain overlay
import { state } from '../core/state.js';
const matrixCanvas = document.createElement('canvas');
matrixCanvas.id = 'matrix-rain';
matrixCanvas.width = window.innerWidth;
matrixCanvas.height = window.innerHeight;
document.body.appendChild(matrixCanvas);
const matrixCtx = matrixCanvas.getContext('2d');
const MATRIX_CHARS = 'アイウエオカキクケコサシスセソタチツテトナニヌネハヒフヘホマミムメモヤユヨラリルレロワヲン0123456789ABCDEF';
const MATRIX_FONT_SIZE = 14;
const MATRIX_COL_COUNT = Math.floor(window.innerWidth / MATRIX_FONT_SIZE);
const matrixDrops = new Array(MATRIX_COL_COUNT).fill(1);
function drawMatrixRain() {
matrixCtx.fillStyle = 'rgba(0, 0, 8, 0.05)';
matrixCtx.fillRect(0, 0, matrixCanvas.width, matrixCanvas.height);
matrixCtx.font = `${MATRIX_FONT_SIZE}px monospace`;
const activity = state.totalActivity();
const density = 0.1 + activity * 0.9;
const activeColCount = Math.max(1, Math.floor(matrixDrops.length * density));
for (let i = 0; i < matrixDrops.length; i++) {
if (i >= activeColCount) {
if (matrixDrops[i] * MATRIX_FONT_SIZE > matrixCanvas.height) continue;
}
let char;
if (state.commitHashes.length > 0 && Math.random() < 0.02) {
const hash = state.commitHashes[Math.floor(Math.random() * state.commitHashes.length)];
char = hash[Math.floor(Math.random() * hash.length)];
} else {
char = MATRIX_CHARS[Math.floor(Math.random() * MATRIX_CHARS.length)];
}
const x = i * MATRIX_FONT_SIZE;
const y = matrixDrops[i] * MATRIX_FONT_SIZE;
matrixCtx.fillStyle = '#aaffaa';
matrixCtx.fillText(char, x, y);
const resetThreshold = 0.975 - activity * 0.015;
if (y > matrixCanvas.height && Math.random() > resetThreshold) {
matrixDrops[i] = 0;
}
matrixDrops[i]++;
}
}
export function init() {
setInterval(drawMatrixRain, 50);
window.addEventListener('resize', () => {
matrixCanvas.width = window.innerWidth;
matrixCanvas.height = window.innerHeight;
});
}