File content as of revision 7:ed2c73e25681:

class Bullet {
    
        int x, topY, bottomY;
        int length = 3;
        int speed = 3;
        uLCD_4DGL uLCD;
        struct Coordinate {
            int x1, y1, x2, y2;
        }
        
    public:   
        Bullet(uLCD_4DGL uLCD);
        void drawBullet(int x, int bottomY);
        void eraseBullet();
        void move();            
};

Bullet::Bullet(uLCD_4DGL uLCD) {
    this->uLCD = uLCD;
}

/*Bullet::Bullet(int x, int bottomY, uLCD_4DGL uLCD) {
    this->x = x;
    this->bottomY = bottomY;
    this->topY = bottomY + length;
    this->uLCD = uLCD;
}*/

void Bullet::drawBullet(int x, int bottomY) {
    this->x = x;
    this->bottomY = bottomY;
    this->topY = bottomY + length;
    uLCD.line(x,topY,x,bottomY, 0xFFFFFF);
}

void Bullet::move() {
    bottomY+= speed;
    drawBullet(x, bottomY);
}

void Bullet::eraseBullet() {
    uLCD.line(x,topY,x,bottomY, 0x000000);
}

Coordinate Bullet::getLocation() {
    Coordinate coor = {x, topY, x, bottomY;}
    return coor;
}