int missileSpeed = 5;


class Missile{
  int x,y, tx,ty;
  
  Missile(int a, int b, int c, int d){
     this.x = a;
     this.y = b;
     this.tx = c;
     this.ty = d;
     
   }
  
  //Draw and move the missile
  void process(){
    if(this.x < this.tx) this.x += missileSpeed;
    else if(this.x > this.tx) this.x -= missileSpeed;
    else this.x = this.tx;
    
    
    if(this.y < this.ty) this.y += missileSpeed;
    else if(this.y > this.ty) this.y -= missileSpeed;
    else this.y = this.ty;
    
    //Draw the Missile
    fill(50);
    rect(this.x, this.y, 10,10);
  }
  
}

class Launcher{
 int x,y, count;
 
 Launcher(int a, int b){
  this.x = a;
  this.y = b;
  
  this.count = 10;
   
 }
  
  
  void process(){
   fill(255,0,0); 
    rect(this.x, this.y, 10, 20);
    
    this.count--;
    
    if(this.count <= 0){
       this.count = 10; 

       //Make a missile at same position of launcher, set target-> THE MOUSE!
       missilez.add(new Missile(this.x, this.y, mouseX, mouseY));
    }
  }
  
}
ArrayList<Missile> missilez = new ArrayList<Missile>();
ArrayList<Launcher> launchy = new ArrayList<Launcher>();

void setup (){
  size(400,400);
  
}


void draw(){
  fill(255);
  rect(0,0,400,400);
  
  for(int i=0; i < launchy.size(); i++) launchy.get(i).process();
  
  for(int i=0; i < missilez.size(); i++) missilez.get(i).process();
    
  for(int i=0; i < missilez.size(); i++){
    if(abs(missilez.get(i).x - missilez.get(i).tx) < missileSpeed  && abs(missilez.get(i).y - missilez.get(i).ty) < missileSpeed){
       missilez.remove(i);
       i--;
    }
    
  }
}


void mousePressed(){
  launchy.add(new Launcher(mouseX, mouseY)); //Add a launcher

  //missilez.add(new Missile(100,100, mouseX, mouseY)); //Add a missile
  
 //You could also add a missile this way
 // Missile newMissile = new Missile(100,100, mouseX, mouseY);
 // missilez.add(newMissile);
}