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index.js
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index.js
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import Matter from 'matter-js'
const BALLS_COUNT = 75
const BALL_RADIUS = 10
const CANVAS_WIDTH = 550
const CANVAS_HEIGHT = 550
export default class App {
static init () {
const Engine = Matter.Engine,
Render = Matter.Render,
World = Matter.World,
Bodies = Matter.Bodies,
Body = Matter.Body,
Runner = Matter.Runner,
Events = Matter.Events
const engine = Engine.create()
const runner = Runner.run(engine)
const render = Render.create({
canvas: canvas,
engine: engine,
options: {
wireframes: false,
width: CANVAS_WIDTH,
height: CANVAS_HEIGHT,
background: 'transparent'
}
})
const balls = []
const ballImagePaths = [
'static/images/1.png',
'static/images/2.png',
'static/images/3.png',
'static/images/4.png',
'static/images/5.png',
'static/images/6.png',
'static/images/7.png',
'static/images/8.png',
'static/images/9.png',
'static/images/10.png',
'static/images/11.png',
'static/images/12.png',
'static/images/13.png',
'static/images/14.png',
'static/images/15.png',
'static/images/16.png',
'static/images/17.png',
'static/images/18.png',
'static/images/19.png',
'static/images/20.png',
'static/images/21.png',
'static/images/22.png',
'static/images/23.png',
'static/images/24.png',
'static/images/25.png',
'static/images/26.png',
'static/images/27.png',
'static/images/28.png',
'static/images/29.png',
'static/images/30.png',
'static/images/31.png',
'static/images/32.png',
'static/images/33.png',
'static/images/34.png',
'static/images/35.png',
'static/images/36.png',
'static/images/37.png',
'static/images/38.png',
'static/images/39.png',
'static/images/40.png',
'static/images/41.png',
'static/images/42.png',
'static/images/43.png',
'static/images/44.png',
'static/images/45.png',
'static/images/46.png',
'static/images/47.png',
'static/images/48.png',
'static/images/49.png',
'static/images/50.png',
'static/images/51.png',
'static/images/52.png',
'static/images/53.png',
'static/images/54.png',
'static/images/55.png',
'static/images/56.png',
'static/images/57.png',
'static/images/58.png',
'static/images/59.png',
'static/images/60.png',
'static/images/61.png',
'static/images/62.png',
'static/images/63.png',
'static/images/64.png',
'static/images/65.png',
'static/images/66.png',
'static/images/67.png',
'static/images/68.png',
'static/images/69.png',
'static/images/70.png',
'static/images/71.png',
'static/images/72.png',
'static/images/73.png',
'static/images/74.png',
'static/images/75.png',
]
const createBall = () => {
const ball = Bodies.circle(
render.canvas.width / 2 - BALL_RADIUS,
render.canvas.height / 2 - 2 * BALL_RADIUS,
BALL_RADIUS, {
restitution: 1.03,
render: {
sprite: {
texture: ballImagePaths[Math.round(Math.random() * (ballImagePaths.length - 1))]
}
}
})
balls.push(ball)
return ball
}
const onRenderTick = () => {
balls.forEach(ball => {
if (ball.position.y >= render.canvas.height - 100) {
Body.applyForce(ball, { x: ball.position.x, y: ball.position.y }, { x: 0.003, y: -0.003 })
}
if (ball.position.y < 120) {
Body.applyForce(ball, { x: ball.position.x, y: ball.position.y }, { x: -0.003, y: 0.003 })
}
if (ball.position.x < 80) {
Body.applyForce(ball, { x: ball.position.x, y: ball.position.y }, { x: 0.003, y: -0.003 })
}
if (ball.position.x > render.canvas.width - 80) {
Body.applyForce(ball, { x: ball.position.x, y: ball.position.y }, { x: -0.003, y: 0.003 })
}
})
}
// Add the balls to the scene
for (let i = 0; i < BALLS_COUNT; i++) {
World.add(engine.world, createBall())
}
// Run the engine
Engine.run(engine)
Render.run(render)
/**
* Build the circle bounds - BEGIN
* */
const addBody = (...bodies) => {
World.add(engine.world, ...bodies)
}
const addRect = ({ x = 0, y = 0, w = 10, h = 10, options = {} } = {}) => {
const body = Bodies.rectangle(x, y, w, h, options)
addBody(body)
return body
}
const sW = CANVAS_WIDTH
const sH = CANVAS_WIDTH
const m = Math.min(sW, sH)
const rat = 1 / 4.5 * 2
const r = m * rat
const pegCount = 64
const TAU = Math.PI * 2
for (let i = 0; i < pegCount; i++) {
const segment = TAU / pegCount
const angle2 = i / pegCount * TAU + segment / 2
const x2 = Math.cos(angle2)
const y2 = Math.sin(angle2)
const cx2 = x2 * r + sW / 2
const cy2 = y2 * r + sH / 2
addRect({
x: cx2,
y: cy2,
w: 100 / 1000 * m,
h: 3000 / 1000 * m,
options: {
angle: angle2,
isStatic: true,
density: 1,
render: {
fillStyle: 'transparent',
strokeStyle: 'white',
lineWidth: 0
}
}
})
}
// Build the circle bounds - END
// Start the blowing with X seconds delay
setTimeout(() => {
Events.on(runner, 'tick', onRenderTick)
}, 3000);
}
}
App.init()