RethinkingSelfReplication/outlierJS.html at main · Hintzelab/RethinkingSelfReplication · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Cellular Automaton</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background-color: #000;
        }
        canvas {
            border: 1px solid #333;
        }
    </style>
</head>
<body>
    <canvas id="canvas"></canvas>
    <div id="frameInfo" style="position: absolute; top: 10px; left: 10px; font-family: monospace; background: rgba(0,0,0,0.8); color: white; padding: 5px; border: 1px solid white;">
        Frame: <span id="frameCounter">0</span>
    </div>
    <script>
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');

        const width = 1024;
        const height = 1024;
        canvas.width = width;
        canvas.height = height;

        const rule = new Array(512);
        let grid;
        let cols, rows;
        const cellSize = 1;

        function hexStringToByteArray(hex) {
            const bytes = [];
            for (let i = 0; i < hex.length; i += 2) {
                bytes.push(parseInt(hex.substr(i, 2), 16));
            }
            return bytes;
        }

        function loadRule() {
            const hex = "111e111b144eebb41079234f151ad6ee111e2d171904dad0ef86b5e8e7ca4c40131d10881679e80a10682534a156861240692a952cada74bf8b086621315a0f2";
            const bytes = hexStringToByteArray(hex);
            let index = 0;
            for (const b of bytes) {
                for (let i = 7; i >= 0; i--) {
                    rule[index++] = (b >> i) & 1;
                }
            }
        }

        function initGrid() {
            cols = Math.floor(width / cellSize);
            rows = Math.floor(height / cellSize);
            grid = Array(cols).fill().map(() => Array(rows).fill(0));

            // Initialize center pattern
            const sx = Math.floor(cols / 2);
            const sy = Math.floor(rows / 2);

            grid[sx][sy] = 1;
            grid[sx - 1][sy + 1] = 1;
            grid[sx][sy + 1] = 1;
            grid[sx + 1][sy + 1] = 1;
            grid[sx + 1][sy + 2] = 1;
        }

        function getNeighbors(x, y) {
            const neighbors = new Array(9);
            const directions = [
                [-1, -1], [0, -1], [1, -1],
                [1, 0],
                [1, 1], [0, 1], [-1, 1],
                [-1, 0],
                [0, 0] // center cell
            ];

            for (let i = 0; i < directions.length; i++) {
                const dx = x + directions[i][0];
                const dy = y + directions[i][1];
                if (dx >= 0 && dx < cols && dy >= 0 && dy < rows) {
                    neighbors[i] = grid[dx][dy];
                } else {
                    neighbors[i] = 0;
                }
            }
            return neighbors;
        }

        function updateGrid() {
            const nextGrid = Array(cols).fill().map(() => Array(rows).fill(0));

            for (let x = 0; x < cols; x++) {
                for (let y = 0; y < rows; y++) {
                    const neighbors = getNeighbors(x, y);
                    let index = 0;
                    for (let i = 0; i < neighbors.length; i++) {
                        index |= (neighbors[i] << i);
                    }
                    nextGrid[x][y] = rule[index];
                }
            }
            grid = nextGrid;
        }

        let frameCount = 0;
        const frameCounter = document.getElementById('frameCounter');

        function draw() {
            // Clear canvas with black background
            ctx.fillStyle = 'black';
            ctx.fillRect(0, 0, width, height);

            // Draw cells
            ctx.fillStyle = 'white';
            for (let i = 0; i < cols; i++) {
                for (let j = 0; j < rows; j++) {
                    if (grid[i][j] === 1) {
                        ctx.fillRect(i * cellSize, j * cellSize, cellSize, cellSize);
                    }
                }
            }

            frameCount++;
            frameCounter.textContent = frameCount;

            updateGrid();
            requestAnimationFrame(draw);
        }

        // Initialize and start
        loadRule();
        initGrid();
        draw();
    </script>
</body>
</html>