few optimization and find aim for towers

main.cpp

@@ -10,7 +10,7 @@ int main(int argc, char *argv[])
 	QApplication a(argc, argv);
 	AD_Core core;
 	AD_Graphics graphics(&core);
-	graphics.resize(800,600);
+	graphics.resize(750,450);
 	//QTimer * timer = new QTimer();
 	//QObject::connect(timer,SIGNAL(timeout()),&core,SLOT(next()));
 	//timer->start(100);