array_bouncing_balls

int numBalls = 20;

int minRadius = 10;

int maxRadius = 20;

​

float[] ballX = new float[numBalls];

float[] ballY = new float[numBalls];

float[] ballXMov = new float[numBalls];

float[] ballYMov = new float[numBalls];

float[] ballSize = new float[numBalls];

​

void setup(){

  size(500, 500);

  background(255);

  smooth();

  noStroke();

  colorMode(HSB, 100, 100, 100, 100);

  fill( 0);

  for(int i = 0; i < numBalls; i++ ){

    ballX[i] = random(40, width-40);

    ballY[i] = random(20, height-20);

    ballXMov[i] = random(-8, 8);

    ballYMov[i] = random(-8, 8);

    ballSize[i] = random(maxRadius, minRadius);

  }

}

void draw(){

  background(255);

  for(int i = 0; i < numBalls; i++){

    if((ballX[i] < 15) || (ballX[i] > width - 15)){

        ballXMov[i] = -ballXMov[i];

      }

      if((ballY[i] < 10) || (ballY[i] > height - 10)){

       ballYMov[i] = -ballYMov[i];

      }

      fill(100, 0, 100, random(10, 100));

      ellipse(ballX[i], ballY[i], ballSize[i], ballSize[i]);

      ballX[i] = ballX[i] + ballXMov[i];

      ballY[i] = ballY[i] + ballXMov[i];

  }

}

​

​