// a class for bullet of boss
class Bossbullet {
  // fields
  PVector pos, vel; //PVector to store position and velocity valuse
  int radius = 7;   // constant radius of bullet factor
  Bossbullet (PVector pos, PVector vel) {
    this.pos = pos;
    this.vel = vel;
  }
    //update the physics for the character
  void update() {
    pos.add(vel); // add velocity to position
    image(bossbulletimg, pos.x, pos.y); //loading image
    fill(255, 0, 128);    // design for bullet
    ellipse(pos.x, pos.y, 2, 2);
  }
  // check collision or not, return a boolean
  boolean collision(Moving other) {
    if ( dist(pos.x, pos.y, other.pos.x, other.pos.y) < 
      radius + other.radius) {
        bosshit.play(0);
      return true; //collision
    }
    return false; //no collision
  }
  void boom() {
    //effects of hit
    image(boomimg, pos.x, pos.y);
  }
}