ランダムな円の動き

//環境情報学部３年　西村駿

//71846319

let vecLocation = [];

let vecVelocity = [];

let R = [];

let G = [];

let B = [];

const NUM = 40;

let diameter = [];

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  frameRate(60);

  for(let i = 0; i < NUM; i++){

    vecLocation[i] = createVector(width/2,height/2);

    vecVelocity[i] = createVector(random(-10,10),random(-10,10));

    R[i] = random(255);

    G[i] = random(255);

    B[i] = random(255);

    diameter[i] = random(10,100);

  }   

}

​

function draw() {

  background(0);

  noStroke();

​

  for(let i = 0; i < NUM; i++){

    fill(R[i],G[i],B[i]);

    ellipse( vecLocation[i].x, vecLocation[i].y,diameter[i],diameter[i]);

    vecLocation[i].add(vecVelocity[i]);

    if(vecLocation[i].x > width || vecLocation[i].x < 0){

      vecVelocity[i].x = vecVelocity[i].x * -1;

    }

    if(vecLocation[i].y > width || vecLocation[i].y < 0){

      vecVelocity[i].y = vecVelocity[i].y * -1;

    }

  }

}