1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* 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: window.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);
},
};
}
|
