Bouncing Ball

int num = 150;

float d = 80;

float[] x = new float[num];

float[] y = new float[num];

float[] vx = new float[num];

float[] vy = new float[num];

float[] r = new float[num];

​

void setup(){

  fullScreen();

  noStroke();

  smooth();

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

    x[i] = random(width);

    y[i] = random(height);

    vx[i] = random(-3,3);

    vy[i] = random(-3,3);

    r[i] = random(3,20);

  }

}

​

void draw(){

  background(255,255,255);

  fill(255,128,128);

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

    x[i]+=vx[i];

    y[i]+=vy[i];

    if(x[i] < 0 || x[i] > width) vx[i] =(-1)*vx[i];

    if(y[i] < 0 || y[i] > height) vy[i] =(-1)*vy[i];

    ellipse(x[i],y[i],r[i],r[i]);

    if( mousePressed == false){

      textAlign(CENTER, CENTER);

      textSize(26); 

      text("Press Mouse" ,width/2, height/2);

      ellipse(x[i],y[i],r[i],r[i]);

    }else{

      for(int j = i+1;j < num ; j++ ){

        float ds = dist(x[i],y[i],x[j],y[j]);

        if(ds < d){

          strokeWeight(1);

          stroke(255,128,128);

          line(x[i],y[i],x[j],y[j]);

        }

      }

    }

  }

}