class Brick extends DrawRect{
  int hit_num;
  boolean alive = true;
  Brick(int x, int y, int width, int height){
    super(x,y,width,height);
    hit_num = 1;
  }
  void main(){
    if(alive){
      draw();
    }
  }
  void hit(){
    hit_num--;
    if(hit_num <= 0){
      alive = false;
    }
  }
}
class Bat extends DrawRect{
  Bat(int x, int y, int width, int height){
    super(x,y,width,height);
  }
  void main(){
    x += ((mouseX-(width>>1))-x)>>2;
    x = constrain(x, 0, game_width-width);
    draw();
  }
}
class Ball extends DrawRect{
  int vx,vy,speed;
  Ball(int x, int y, int width, int height){
    super(x,y,width,height);
    vx = 2;
    vy = 4;
    speed = 0;
  }
  void main(){
    move();
    checkBrickCollision();
    checkWallCollision(game_width, game_height);
    checkBatCollision();
    draw();
  }
  void move(){
    x += vx;
    y += vy;
  }
  void checkBatCollision(){
    if(intersects(this, bat)){
      resolveBatCollision(bat);
    }
  }
  void checkWallCollision(int w, int h){
    if(x+width >= w){
      x = w-width;
      vx = -vx;
    }
    if(x < 0){
      x = 0;
      vx = -vx;
    }
    if(y < 0){
      y = 0;
      vy = -vy;
    }
    if(y+height > h){
      y = h-height;
      vy = -vy;
    }
  }
  void checkBrickCollision(){
    for(int i = 0; i < brick.length; i++){
      if(intersects(this, brick[i]) && brick[i].alive){
        resolveBrickCollision(brick[i]);
      }
    }
  }
  void resolveBatCollision(Bat b){
    updateCenter();
    int side = b.voronoi(cx, cy);
    int xd = cx - b.cx;
    if(abs(xd) < b.width>>1) side = UP;
    switch(side){
      case UP:
        y = b.y-height;
        if(xd < -50){
          vx = -4-speed;
          vy = -2-speed;
        } else if(xd < -40){
          vx = -3-speed;
          vy = -3-speed;
        } else if(xd < -15){
          vx = -2-speed;
          vy = -4-speed;
        } else if(xd < 0){
          vx = -1-speed;
          vy = -5-speed;
        } else if(xd >= 0 && xd < 16){
          vx = 1+speed;
          vy = -5-speed;
        } else if(xd > 15){
          vx = 2+speed;
          vy = -4-speed;
        } else if(xd > 40){
          vx = 3+speed;
          vy = -3-speed;
        } else if(xd > 50){
          vx = 4+speed;
          vy = -2-speed;
        }
        break;
      case LEFT:
        x = b.x-width;
        vx = -4-speed;
        vy = -2-speed;
        break;
      case UP_LEFT:
        x = b.x-width;
        y = b.y-height;
        vx = -4-speed;
        vy = -2-speed;
        break;
      case RIGHT:
        x = b.x+b.width;
        vx = 4+speed;
        vy = -2-speed;
        break;
      case UP_RIGHT:
        x = b.x+b.width;
        y = b.y-height;
        vx = 4+speed;
        vy = -2-speed;
        break;
    }
  }
  void resolveBrickCollision(Brick w){
    w.hit();
    updateCenter();
    int side = w.voronoi4(cx, cy);
    switch(side){
      case RIGHT:
        x = w.x+w.width;
        vx = abs(vx);
        break;
      case DOWN:
        y = w.y+w.height;
        vy = abs(vy);
        break;
      case LEFT:
        x = w.x-width;
        vx = -abs(vx);
        break;
      case UP:
        y = w.y-height;
        vy = -abs(vy);
        break;
      case DOWN_RIGHT:
        x = w.x+w.width;
        y = w.y+w.height;
        vx = abs(vx);
        vy = abs(vy);
        break;
      case DOWN_LEFT:
        x = w.x-width;
        y = w.y+w.height;
        vx = -abs(vx);
        vy = abs(vy);
        break;
      case UP_LEFT:
        x = w.x-width;
        y = w.y-height;
        vx = -abs(vx);
        vy = -abs(vy);
        break;
      case UP_RIGHT:
        x = w.x+w.width;
        y = w.y-height;
        vx = abs(vx);
        vy = -abs(vy);
        break;
    }
  }
}