rename: client -> frontend

packages/frontend/src/scripts/physics.ts

@@ -0,0 +1,152 @@
+import * as Matter from 'matter-js';
+
+export function physics(container: HTMLElement) {
+	const containerWidth = container.offsetWidth;
+	const containerHeight = container.offsetHeight;
+	const containerCenterX = containerWidth / 2;
+
+	// サイズ固定化(要らないかも？)
+	container.style.position = 'relative';
+	container.style.boxSizing = 'border-box';
+	container.style.width = `${containerWidth}px`;
+	container.style.height = `${containerHeight}px`;
+
+	// create engine
+	const engine = Matter.Engine.create({
+		constraintIterations: 4,
+		positionIterations: 8,
+		velocityIterations: 8,
+	});
+
+	const world = engine.world;
+
+	// create renderer
+	const render = Matter.Render.create({
+		engine: engine,
+		//element: document.getElementById('debug'),
+		options: {
+			width: containerWidth,
+			height: containerHeight,
+			background: 'transparent', // transparent to hide
+			wireframeBackground: 'transparent', // transparent to hide
+		},
+	});
+
+	// Disable to hide debug
+	Matter.Render.run(render);
+
+	// create runner
+	const runner = Matter.Runner.create();
+	Matter.Runner.run(runner, engine);
+
+	const groundThickness = 1024;
+	const ground = Matter.Bodies.rectangle(containerCenterX, containerHeight + (groundThickness / 2), containerWidth, groundThickness, {
+		isStatic: true,
+		restitution: 0.1,
+		friction: 2,
+	});
+
+	//const wallRight = Matter.Bodies.rectangle(window.innerWidth+50, window.innerHeight/2, 100, window.innerHeight, wallopts);
+	//const wallLeft = Matter.Bodies.rectangle(-50, window.innerHeight/2, 100, window.innerHeight, wallopts);
+
+	Matter.World.add(world, [
+		ground,
+		//wallRight,
+		//wallLeft,
+	]);
+
+	const objEls = Array.from(container.children) as HTMLElement[];
+	const objs: Matter.Body[] = [];
+	for (const objEl of objEls) {
+		const left = objEl.dataset.physicsX ? parseInt(objEl.dataset.physicsX) : objEl.offsetLeft;
+		const top = objEl.dataset.physicsY ? parseInt(objEl.dataset.physicsY) : objEl.offsetTop;
+
+		let obj: Matter.Body;
+		if (objEl.classList.contains('_physics_circle_')) {
+			obj = Matter.Bodies.circle(
+				left + (objEl.offsetWidth / 2),
+				top + (objEl.offsetHeight / 2),
+				Math.max(objEl.offsetWidth, objEl.offsetHeight) / 2,
+				{
+					restitution: 0.5,
+				},
+			);
+		} else {
+			const style = window.getComputedStyle(objEl);
+			obj = Matter.Bodies.rectangle(
+				left + (objEl.offsetWidth / 2),
+				top + (objEl.offsetHeight / 2),
+				objEl.offsetWidth,
+				objEl.offsetHeight,
+				{
+					chamfer: { radius: parseInt(style.borderRadius || '0', 10) },
+					restitution: 0.5,
+				},
+			);
+		}
+		objEl.id = obj.id.toString();
+		objs.push(obj);
+	}
+
+	Matter.World.add(engine.world, objs);
+
+	// Add mouse control
+
+	const mouse = Matter.Mouse.create(container);
+	const mouseConstraint = Matter.MouseConstraint.create(engine, {
+		mouse: mouse,
+		constraint: {
+			stiffness: 0.1,
+			render: {
+				visible: false,
+			},
+		},
+	});
+
+	Matter.World.add(engine.world, mouseConstraint);
+
+	// keep the mouse in sync with rendering
+	render.mouse = mouse;
+
+	for (const objEl of objEls) {
+		objEl.style.position = 'absolute';
+		objEl.style.top = '0';
+		objEl.style.left = '0';
+		objEl.style.margin = '0';
+	}
+
+	window.requestAnimationFrame(update);
+
+	let stop = false;
+
+	function update() {
+		for (const objEl of objEls) {
+			const obj = objs.find(obj => obj.id.toString() === objEl.id.toString());
+			if (obj == null) continue;
+
+			const x = (obj.position.x - objEl.offsetWidth / 2);
+			const y = (obj.position.y - objEl.offsetHeight / 2);
+			const angle = obj.angle;
+			objEl.style.transform = `translate(${x}px, ${y}px) rotate(${angle}rad)`;
+		}
+
+		if (!stop) {
+			window.requestAnimationFrame(update);
+		}
+	}
+
+	// 奈落に落ちたオブジェクトは消す
+	const intervalId = window.setInterval(() => {
+		for (const obj of objs) {
+			if (obj.position.y > (containerHeight + 1024)) Matter.World.remove(world, obj);
+		}
+	}, 1000 * 10);
+
+	return {
+		stop: () => {
+			stop = true;
+			Matter.Runner.stop(runner);
+			window.clearInterval(intervalId);
+		},
+	};
+}