markovChain

sketches/GameOfLive.js

@@ -0,0 +1,122 @@
+let entities = [];
+let entityWidth = 10;
+
+function setup() {
+	createCanvas(windowWidth, windowHeight);
+
+	fill(20,150,200)
+
+	// Glider
+	entities.push({ x: 0, y: 0 });
+	entities.push({ x: entityWidth, y: 0 });
+	entities.push({ x: entityWidth * 2, y: 0 });
+	entities.push({ x: 0, y: entityWidth });
+	entities.push({ x: entityWidth, y: entityWidth * 2 });
+
+	entities.push({ x: entityWidth * 3, y: entityWidth * 4 });
+	entities.push({ x: entityWidth * 4, y: entityWidth * 4 });
+	entities.push({ x: entityWidth * 5, y: entityWidth * 4 });
+}
+
+function draw() {
+	background(255);
+	drawEntities();
+	runLife();
+	summonRandomCubes(50, width);
+}
+
+function drawEntities() {
+	for (let cell of entities) {
+		if (cell.x < -width/2 || cell.x > width/2 || cell.y < -height/2 || cell.y > height/2){
+			continue;
+		}
+		square(width / 2 + cell.x, height / 2 + cell.y, entityWidth);
+	}
+}
+
+function runLife() {
+	let next = [];
+
+	let candidates = [];
+	for (let cell of entities) {
+		if (!isInArray(candidates, cell.x, cell.y)) {
+			candidates.push({ x: cell.x, y: cell.y });
+		}
+		for (let dx = -1; dx <= 1; dx++) {
+			for (let dy = -1; dy <= 1; dy++) {
+				if (dx === 0 && dy === 0) continue;
+				let nx = cell.x + dx * entityWidth;
+				let ny = cell.y + dy * entityWidth;
+				if (!isInArray(candidates, nx, ny)) {
+					candidates.push({ x: nx, y: ny });
+				}
+			}
+		}
+	}
+
+	// Apply rules
+	for (let cand of candidates) {
+		let neighbors = 0;
+		for (let cell of entities) {
+			let dx = Math.abs(cand.x - cell.x);
+			let dy = Math.abs(cand.y - cell.y);
+			if ((dx === entityWidth && dy === 0) ||
+				(dx === 0 && dy === entityWidth) ||
+				(dx === entityWidth && dy === entityWidth)) {
+				neighbors++;
+			}
+		}
+		let isAlive = isInArray(entities, cand.x, cand.y);
+		if (isAlive && (neighbors === 2 || neighbors === 3)) {
+			next.push({ x: cand.x, y: cand.y });
+		}
+		if (!isAlive && neighbors === 3) {
+			next.push({ x: cand.x, y: cand.y });
+		}
+	}
+	entities = next;
+}
+
+function isInArray(arr, x, y) {
+	for (let item of arr) {
+		if (item.x === x && item.y === y) return true;
+	}
+	return false;
+}
+
+function mousePressed() {
+	let newX = Math.round((mouseX - width / 2) / entityWidth) * entityWidth;
+	let newY = Math.round((mouseY - height / 2) / entityWidth) * entityWidth;
+
+	let alreadyExists = false;
+	for (let cell of entities) {
+		if (cell.x === newX && cell.y === newY) {
+			alreadyExists = true;
+			break;
+		}
+	}
+	if (!alreadyExists) {
+		entities.push({ x: newX, y: newY });
+	}
+}
+
+function summonRandomCubes(amount, area){
+	for (let i = 0; i < amount; i++){
+		let newX = Math.round((random(-area, area) - width / 2) / entityWidth) * entityWidth;
+		let newY = Math.round((random(-area, area) - height / 2) / entityWidth) * entityWidth;
+		let alreadyExists = false;
+		for (let cell of entities) {
+			if (cell.x === newX && cell.y === newY) {
+				alreadyExists = true;
+				break;
+			}
+		}
+		if (!alreadyExists) {
+			entities.push({ x: newX, y: newY });
+		}
+	}
+}
+
+function windowResized() {
+	resizeCanvas(windowWidth, windowHeight);
+}