152 lines
3.3 KiB
JavaScript
152 lines
3.3 KiB
JavaScript
let canvas = document.getElementById('scene');
|
|
let ctx = canvas.getContext("2d");
|
|
|
|
let resizeCanvas = () => {
|
|
canvas.width = window.innerWidth;
|
|
canvas.height = window.innerHeight;
|
|
}
|
|
resizeCanvas()
|
|
|
|
let onResize = (event) => {
|
|
resizeCanvas()
|
|
}
|
|
|
|
window.addEventListener('resize', onResize);
|
|
|
|
|
|
class Boule {
|
|
constructor (x,y,s) {
|
|
this.pos = {
|
|
x:x,
|
|
y:y,
|
|
}
|
|
this.size = s
|
|
this.vx = -2+Math.random()*4;
|
|
this.vy = -2+Math.random()*4;
|
|
this.color = {
|
|
h:360,
|
|
s:50,
|
|
l:50
|
|
}
|
|
}
|
|
|
|
draw(){
|
|
ctx.beginPath();
|
|
ctx.fillStyle = `hsl(${this.color.h},${this.color.s}%,${this.color.l}%)`;
|
|
ctx.arc(this.pos.x, this.pos.y, this.size, 0, 2 * Math.PI);
|
|
ctx.fill();
|
|
/*ctx.fillStyle = "red";
|
|
ctx.arc(this.pos.x, this.pos.y, this.size, 0, 2 * Math.PI);
|
|
ctx.fill();*/
|
|
}
|
|
|
|
move(){
|
|
this.pos.x += this.vx;
|
|
this.pos.y += this.vy;
|
|
|
|
if (this.pos.x >= canvas.width || this.pos.x <= 0){
|
|
this.vx *=-1;
|
|
}
|
|
if (this.pos.y >= canvas.height || this.pos.y <= 0 ){
|
|
this.vy *=-1;
|
|
}
|
|
this.draw();
|
|
}
|
|
}
|
|
|
|
|
|
let boules = [];
|
|
let maboule;
|
|
function createBoule(){
|
|
maboule = new Boule(
|
|
canvas.width / 2,
|
|
canvas.height / 2,
|
|
2+Math.random()*10
|
|
);
|
|
maboule.draw();
|
|
boules.push(maboule);
|
|
}
|
|
|
|
setInterval(()=>{
|
|
createBoule();
|
|
},100)
|
|
|
|
let anime = () =>{
|
|
ctx.clearRect(0,0, canvas.width, canvas.height)
|
|
for (let i = 0; i < boules.length; i++) {
|
|
let boule_a = boules[i];
|
|
for (let j = i+1; j < boules.length; j++) {
|
|
let boule_b = boules[j];
|
|
// distance entre les centre des boules
|
|
let dist = Math.sqrt(
|
|
Math.pow(boule_b.pos.x - boule_a.pos.x, 2) +
|
|
Math.pow(boule_b.pos.y - boule_a.pos.y, 2)
|
|
);
|
|
|
|
if(dist < boule_a.size+boule_b.size){
|
|
|
|
nx = (boule_b.pos.x - boule_a.pos.x)/dist;
|
|
ny = (boule_b.pos.y - boule_a.pos.y)/dist;
|
|
|
|
vA_n = boule_a.vx*nx + boule_a.vy*ny
|
|
vB_n = boule_b.vx*nx + boule_b.vy*ny
|
|
|
|
boule_a.vx += (vB_n - vA_n) * nx
|
|
boule_a.vy += (vB_n - vA_n) * ny
|
|
boule_b.vx += (vA_n - vB_n) * nx
|
|
boule_b.vy += (vA_n - vB_n) * ny
|
|
boule_a.move();
|
|
boule_b.move();
|
|
}
|
|
}
|
|
boule_a.move();
|
|
}
|
|
|
|
|
|
|
|
window.requestAnimationFrame(anime);
|
|
}
|
|
|
|
window.requestAnimationFrame(anime);
|
|
|
|
let onMouseMove = (event) => {
|
|
// console.log('event', event);
|
|
// h 0 -> 360
|
|
// x 0 -> canvas.width
|
|
let h = 360 * (event.x / canvas.width);
|
|
// console.log('h', h);
|
|
|
|
let s = 100 * (event.y / canvas.height)
|
|
console.log('s', s);
|
|
|
|
boules.forEach(boule => {
|
|
boule.color.h = h;
|
|
boule.color.s = s;
|
|
});
|
|
}
|
|
|
|
window.addEventListener('mousemove', onMouseMove);
|
|
|
|
|
|
/*for (let index = 0; index < 10000; index++) {
|
|
maboule = new Boule(
|
|
Math.random()*canvas.width,
|
|
Math.random()*canvas.height,
|
|
2+Math.random()*10
|
|
);
|
|
maboule.draw();
|
|
boules.push(maboule);
|
|
}
|
|
|
|
let anime = () => {
|
|
ctx.clearRect(0,0, canvas.width, canvas.height)
|
|
boules.forEach((boule) => {
|
|
boule.move();
|
|
|
|
})
|
|
window.requestAnimationFrame(anime);
|
|
}
|
|
|
|
window.requestAnimationFrame(anime);*/
|
|
|