Add Physilinks prototype with scoring and game over
This commit is contained in:
Daddy32
413
main.js
Normal file
413
main.js
Normal file
@@ -0,0 +1,413 @@
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(() => {
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const {
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Engine,
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Render,
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Runner,
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World,
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Bodies,
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Constraint,
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Events,
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Query,
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Vector,
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} = Matter;
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const config = {
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gravity: 0.78,
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spawnIntervalMs: 720,
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minChain: 3,
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palette: ["#ff595e", "#ffca3a", "#8ac926", "#1982c4", "#6a4c93"],
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ballRadius: 48,
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};
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const sceneEl = document.getElementById("scene-wrapper");
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const activeColorEl = document.getElementById("active-color");
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const chainLenEl = document.getElementById("chain-length");
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const spawnRateEl = document.getElementById("spawn-rate");
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const minLinkEl = document.getElementById("min-link");
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const paletteLegendEl = document.getElementById("palette-legend");
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const scoreEl = document.getElementById("score");
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const gameOverEl = document.getElementById("game-over");
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const finalScoreEl = document.getElementById("final-score");
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const restartBtn = document.getElementById("restart-btn");
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let width = sceneEl.clientWidth;
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let height = sceneEl.clientHeight;
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const engine = Engine.create();
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engine.gravity.y = config.gravity;
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const world = engine.world;
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const render = Render.create({
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element: sceneEl,
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engine,
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options: {
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width,
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height,
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wireframes: false,
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background: "transparent",
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showAngleIndicator: false,
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pixelRatio: window.devicePixelRatio || 1,
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},
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});
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Render.run(render);
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const runner = Runner.create();
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Runner.run(runner, engine);
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// Static boundaries and some obstacles to bounce around.
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let boundaries = [];
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const createBounds = () => {
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boundaries.forEach((b) => World.remove(world, b));
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boundaries = [
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Bodies.rectangle(width / 2, height + 40, width, 80, {
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isStatic: true,
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restitution: 0.8,
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}),
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Bodies.rectangle(-40, height / 2, 80, height * 2, { isStatic: true }),
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Bodies.rectangle(width + 40, height / 2, 80, height * 2, {
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isStatic: true,
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}),
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];
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boundaries.push(
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Bodies.rectangle(width * 0.25, height * 0.55, 160, 20, {
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isStatic: true,
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angle: -0.3,
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}),
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Bodies.rectangle(width * 0.7, height * 0.4, 220, 24, {
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isStatic: true,
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angle: 0.26,
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}),
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);
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World.add(world, boundaries);
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};
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createBounds();
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const balls = [];
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let spawnTimer = null;
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let score = 0;
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let gameOver = false;
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const chain = {
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active: false,
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color: null,
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bodies: [],
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constraints: [],
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pointer: null,
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};
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const spawnBall = () => {
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if (gameOver) return;
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const color =
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config.palette[Math.floor(Math.random() * config.palette.length)];
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const x = Math.max(
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config.ballRadius + 10,
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Math.min(width - config.ballRadius - 10, Math.random() * width),
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);
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const y = -config.ballRadius * 2;
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const ball = Bodies.circle(x, y, config.ballRadius, {
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restitution: 0.72,
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friction: 0.01,
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frictionAir: 0.015,
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render: {
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fillStyle: color,
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strokeStyle: "#0b1222",
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lineWidth: 2,
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},
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});
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ball.plugin = { color, hasEntered: false, entryCheckId: null };
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balls.push(ball);
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World.add(world, ball);
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ball.plugin.entryCheckId = setTimeout(() => {
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ball.plugin.entryCheckId = null;
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if (gameOver) return;
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if (!ball.plugin.hasEntered && Math.abs(ball.velocity.y) < 0.2) {
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triggerGameOver();
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}
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}, 1500);
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};
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const startSpawner = () => {
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if (spawnTimer) clearInterval(spawnTimer);
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spawnTimer = setInterval(spawnBall, config.spawnIntervalMs);
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};
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const cleanupBall = (ball) => {
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if (ball.plugin && ball.plugin.entryCheckId) {
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clearTimeout(ball.plugin.entryCheckId);
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ball.plugin.entryCheckId = null;
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}
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};
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const triggerGameOver = () => {
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if (gameOver) return;
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gameOver = true;
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resetChainVisuals();
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if (spawnTimer) clearInterval(spawnTimer);
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finalScoreEl.textContent = score;
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gameOverEl.classList.add("visible");
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};
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const restartGame = () => {
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gameOver = false;
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score = 0;
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resetChainVisuals();
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balls.forEach((ball) => {
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cleanupBall(ball);
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World.remove(world, ball);
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});
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balls.length = 0;
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gameOverEl.classList.remove("visible");
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updateHud();
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startSpawner();
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};
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const setHighlight = (body, on) => {
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body.render.lineWidth = on ? 4 : 2;
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body.render.strokeStyle = on ? "#f8fafc" : "#0b1222";
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};
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const resetChainVisuals = () => {
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chain.bodies.forEach((b) => setHighlight(b, false));
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chain.constraints.forEach((c) => World.remove(world, c));
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chain.active = false;
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chain.color = null;
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chain.bodies = [];
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chain.constraints = [];
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chain.pointer = null;
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updateHud();
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};
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const removeLastFromChain = () => {
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const removedConstraint = chain.constraints.pop();
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if (removedConstraint) {
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World.remove(world, removedConstraint);
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}
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const removedBody = chain.bodies.pop();
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if (removedBody) setHighlight(removedBody, false);
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updateHud();
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};
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const addToChain = (body) => {
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const last = chain.bodies[chain.bodies.length - 1];
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const dist = Vector.magnitude(Vector.sub(last.position, body.position));
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const constraint = Constraint.create({
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bodyA: last,
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bodyB: body,
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length: dist,
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stiffness: 0.9,
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render: {
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strokeStyle: chain.color,
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lineWidth: 3,
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},
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});
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chain.constraints.push(constraint);
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chain.bodies.push(body);
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setHighlight(body, true);
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World.add(world, constraint);
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updateHud();
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};
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const spawnScorePopup = (point, amount, color) => {
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if (!point) return;
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const el = document.createElement("div");
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el.className = "floating-score";
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el.textContent = `+${amount}`;
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el.style.left = `${point.x}px`;
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el.style.top = `${point.y}px`;
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el.style.color = color || "#e0f2fe";
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sceneEl.appendChild(el);
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setTimeout(() => el.remove(), 950);
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};
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const finishChain = (releasePoint) => {
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if (!chain.active || gameOver) return;
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if (chain.bodies.length >= config.minChain) {
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const gain = 10 * Math.pow(chain.bodies.length, 2);
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score += gain;
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spawnScorePopup(releasePoint || chain.pointer, gain, chain.color);
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chain.constraints.forEach((c) => World.remove(world, c));
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chain.bodies.forEach((body) => {
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cleanupBall(body);
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World.remove(world, body);
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});
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// Remove cleared balls from tracking list.
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for (let i = balls.length - 1; i >= 0; i -= 1) {
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if (chain.bodies.includes(balls[i])) {
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balls.splice(i, 1);
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}
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}
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} else {
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chain.constraints.forEach((c) => World.remove(world, c));
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chain.bodies.forEach((b) => setHighlight(b, false));
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}
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chain.active = false;
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chain.color = null;
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chain.bodies = [];
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chain.constraints = [];
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chain.pointer = null;
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updateHud();
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};
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const pickBody = (point) => {
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const hits = Query.point(balls, point);
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return hits[0];
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};
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const getPointerPosition = (evt) => {
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const rect = render.canvas.getBoundingClientRect();
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const clientX = evt.touches ? evt.touches[0].clientX : evt.clientX;
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const clientY = evt.touches ? evt.touches[0].clientY : evt.clientY;
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return {
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x: clientX - rect.left,
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y: clientY - rect.top,
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};
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};
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const handlePointerDown = (evt) => {
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if (gameOver) return;
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const point = getPointerPosition(evt);
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const body = pickBody(point);
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if (!body) return;
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chain.active = true;
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chain.color = body.plugin.color;
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chain.bodies = [body];
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chain.constraints = [];
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chain.pointer = point;
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setHighlight(body, true);
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updateHud();
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};
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const handlePointerMove = (evt) => {
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if (!chain.active) return;
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if (gameOver) return;
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const point = getPointerPosition(evt);
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chain.pointer = point;
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const body = pickBody(point);
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if (!body) return;
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const alreadyInChain = chain.bodies.includes(body);
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if (alreadyInChain) {
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const targetIndex = chain.bodies.indexOf(body);
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if (chain.bodies.length > 1 && targetIndex === chain.bodies.length - 2) {
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removeLastFromChain();
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}
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return;
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}
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if (body.plugin.color !== chain.color) return;
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addToChain(body);
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};
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const handlePointerUp = () => finishChain(chain.pointer);
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render.canvas.addEventListener("mousedown", handlePointerDown);
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render.canvas.addEventListener("mousemove", handlePointerMove);
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window.addEventListener("mouseup", handlePointerUp);
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render.canvas.addEventListener(
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"touchstart",
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(e) => {
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e.preventDefault();
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handlePointerDown(e);
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},
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{ passive: false },
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);
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render.canvas.addEventListener(
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"touchmove",
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(e) => {
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e.preventDefault();
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handlePointerMove(e);
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},
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{ passive: false },
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);
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render.canvas.addEventListener(
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"touchend",
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(e) => {
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e.preventDefault();
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handlePointerUp(e);
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},
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{ passive: false },
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);
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const updateHud = () => {
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spawnRateEl.textContent = `${config.spawnIntervalMs} ms`;
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minLinkEl.textContent = config.minChain;
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chainLenEl.textContent = chain.bodies.length;
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scoreEl.textContent = score;
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if (chain.color) {
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activeColorEl.textContent = "";
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activeColorEl.style.display = "inline-block";
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activeColorEl.style.width = "14px";
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activeColorEl.style.height = "14px";
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activeColorEl.style.borderRadius = "50%";
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activeColorEl.style.background = chain.color;
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activeColorEl.style.border = "1px solid rgba(255,255,255,0.3)";
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} else {
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activeColorEl.removeAttribute("style");
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activeColorEl.textContent = "—";
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}
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};
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const buildLegend = () => {
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paletteLegendEl.innerHTML = "";
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config.palette.forEach((color) => {
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const swatch = document.createElement("span");
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swatch.style.background = color;
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paletteLegendEl.appendChild(swatch);
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});
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};
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const handleResize = () => {
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width = sceneEl.clientWidth;
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height = sceneEl.clientHeight;
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render.canvas.width = width;
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render.canvas.height = height;
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render.options.width = width;
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render.options.height = height;
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Render.lookAt(render, {
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min: { x: 0, y: 0 },
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max: { x: width, y: height },
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});
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createBounds();
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};
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Events.on(engine, "afterUpdate", () => {
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// Keep stray balls within the play area horizontally.
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balls.forEach((ball) => {
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if (
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!ball.plugin.hasEntered &&
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ball.position.y > config.ballRadius * 1.5
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) {
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ball.plugin.hasEntered = true;
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}
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if (
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ball.position.x < -100 ||
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ball.position.x > width + 100 ||
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ball.position.y > height + 500
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) {
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cleanupBall(ball);
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ball.plugin.hasEntered = true;
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Matter.Body.setPosition(ball, { x: Math.random() * width, y: -40 });
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Matter.Body.setVelocity(ball, { x: 0, y: 0 });
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}
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});
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});
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Events.on(render, "afterRender", () => {
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if (!chain.active || !chain.pointer || chain.bodies.length === 0) return;
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const last = chain.bodies[chain.bodies.length - 1];
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const ctx = render.context;
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ctx.save();
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ctx.strokeStyle = chain.color || "#fff";
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ctx.lineWidth = 3;
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ctx.setLineDash([6, 6]);
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ctx.beginPath();
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ctx.moveTo(last.position.x, last.position.y);
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ctx.lineTo(chain.pointer.x, chain.pointer.y);
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ctx.stroke();
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ctx.restore();
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});
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window.addEventListener("resize", handleResize);
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restartBtn.addEventListener("click", restartGame);
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buildLegend();
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updateHud();
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startSpawner();
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})();
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