Diffusion Ant (feature/rooting) Code

ant/tests/test_timer_chain_iter.js
8b573570d588feature/rooting

test_timer_chain_iter.js
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			const WIDTH = 150;
			const HEIGHT = 40;

			const cells = new Map();
			const directions = [
			[-1, 1],
			[0, 1],
			[1, 1],
			[-1, 0],
			[1, 0],
			[-1, -1],
			[0, -1],
			[1, -1]
			];

			const key_for = (x, y) => `${x}-${y}`;

			for (let y = 0; y < HEIGHT; y++) {
			for (let x = 0; x < WIDTH; x++) {
			cells.set(key_for(x, y), {
			x,
			y,
			alive: Math.random() <= 0.2,
			next_state: false,
			neighbours: []
			});
			}
			}

			for (const cell of cells.values()) {
			for (const [dx, dy] of directions) {
			const nx = cell.x + dx;
			const ny = cell.y + dy;
			if (nx < 0 \|\| ny < 0 \|\| nx >= WIDTH \|\| ny >= HEIGHT) continue;
			const neighbour = cells.get(key_for(nx, ny));
			if (neighbour) cell.neighbours.push(neighbour);
			}
			}

			const dotick = () => {
			for (const cell of cells.values()) {
			let alive_neighbours = 0;
			for (const neighbour of cell.neighbours) {
			if (neighbour.alive) alive_neighbours++;
			}

			if (!cell.alive && alive_neighbours === 3) {
			cell.next_state = true;
			} else if (alive_neighbours < 2 \|\| alive_neighbours > 3) {
			cell.next_state = false;
			} else {
			cell.next_state = cell.alive;
			}
			}

			for (const cell of cells.values()) {
			cell.alive = cell.next_state;
			}
			};

			const render = () => {
			let rendering = '';
			for (let y = 0; y < HEIGHT; y++) {
			for (let x = 0; x < WIDTH; x++) {
			const cell = cells.get(key_for(x, y));
			rendering += cell && cell.alive ? 'o' : ' ';
			}
			rendering += '\n';
			}
			return rendering;
			};

			let ticks = 0;
			const start = performance.now();
			const duration = 30000;
			const batch_size = 100;

			const run = () => {
			for (let i = 0; i < batch_size && performance.now() - start < duration; i++) {
			dotick();
			render();
			}

			ticks += batch_size;
			if (performance.now() - start >= duration) {
			console.log('done', ticks);
			return;
			}

			setTimeout(run, 0);
			};

			setTimeout(run, 0);

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