Oprea

Bullet

---

#ifndef BULLET_H
#define BULLET_H
#include<QObject>
#include<QGraphicsRectItem>

class Bullet: public QObject, public QGraphicsRectItem
{
Q_OBJECT
public:
Bullet();
public slots:
void amove();
};

#endif // BULLET_H

 

#include "bullet.h"
#include<QTimer>
#include<QGraphicsScene>
#include<QGraphicsItem>
#include<QList>
#include<typeinfo>
#include"score.h"
#include"enemy.h"
#include "game.h"

extern game * gam;

void Bullet::amove(){
//if bullet collides with enemy, destroy both
QList<QGraphicsItem *> colliding_items = collidingItems();
for(int i = 0, n = colliding_items.size(); i< n; i++){
if (typeid(*(colliding_items[i])) == typeid(Enemy)){
//increase the score

// gam->score->increase(); //when i use this line, and a bullet hit an enemy,
//my program is stop working, "the process has unexpectedly finished"

// remove them both
scene() -> removeItem(colliding_items[i]);
scene() ->removeItem(this);
//delete them both
delete colliding_items[i];
delete this;
return;
}
}
setPos(x(),y()-10);
if(pos().y()+rect().height() < 0){
scene()->removeItem(this);
delete this;
}
}

Bullet::Bullet(){
setRect(50, 0, 10, 50);
//connect
QTimer * timer= new QTimer();
connect(timer, SIGNAL(timeout()), this, SLOT(amove()));
timer->start(50);
}