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/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
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);
},
};
}
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