Tut 11

CMakeLists.txt

@@ -13,6 +13,8 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
 find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)
+find_package(Qt6 REQUIRED COMPONENTS Multimedia)
+find_package(Qt6 REQUIRED COMPONENTS Gui)
 
 set(PROJECT_SOURCES
         main.cpp
@@ -46,6 +48,8 @@ else()
 endif()
 
 target_link_libraries(TowerDefense PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
+target_link_libraries(TowerDefense PRIVATE Qt6::Multimedia)
+target_link_libraries(TowerDefense PRIVATE Qt6::Gui)
 
 set_target_properties(TowerDefense PROPERTIES
     MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com

game.cpp

@@ -3,13 +3,14 @@
 #include "tower.h"
 #include "bullet.h"
 
-Game::Game() {
+Game::Game(): QGraphicsView() {
     scene = new QGraphicsScene(this);
     scene->setSceneRect(0,0,800,600);
     setScene(scene);
 
     // create a tower
     Tower *t = new Tower();
+    t->setPos(250,250);
 
     // add tower
     scene->addItem(t);

main.cpp

@@ -2,13 +2,13 @@
 
 #include <QApplication>
 
-
+Game *game;
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
 
-    Game *game = new Game();
+    game = new Game();
     game->show();
 
     return a.exec();

tower.cpp

@@ -2,8 +2,13 @@
 #include <QPixmap>
 #include <QVector>
 #include <QPointF>
+#include "bullet.h"
+#include <QTimer>
+#include "game.h"
 
-Tower::Tower(QGraphicsItem *parent) {
+extern Game *game;
+
+Tower::Tower(QGraphicsItem *parent): QObject(), QGraphicsPixmapItem(parent) {
     setPixmap(QPixmap(":/images/tower.png"));
 
     // create points vectors
@@ -30,4 +35,21 @@ Tower::Tower(QGraphicsItem *parent) {
     QLineF ln(poly_center, tower_center);
     attack_area->setPos(x()+ln.dx(), y()+ln.dy());
 
+    // connect timer to attack target
+    QTimer *timer = new QTimer();
+    connect(timer, SIGNAL(timeout()), this,SLOT(attack_target()));
+    timer->start(1000);
+
+    attack_dest = QPointF(800,0);
+}
+
+void Tower::attack_target() {
+    Bullet *bullet = new Bullet();
+    bullet->setPos(x()+34, y()+64);
+
+    QLineF ln(QPointF(x()+34, y()+64), attack_dest);
+    int angle = -1 * ln.angle();
+
+    bullet->setRotation(angle);
+    game->scene->addItem(bullet);
 }

tower.h

@@ -3,12 +3,18 @@
 
 #include <QGraphicsPixmapItem>
 #include <QGraphicsPolygonItem>
+#include <QPointF>
+#include <QObject>
 
-class Tower : public QGraphicsPixmapItem {
+class Tower : public QObject, public QGraphicsPixmapItem {
+    Q_OBJECT
 public:
     Tower(QGraphicsItem *parent=0);
+public slots:
+    void attack_target();
 private:
     QGraphicsPolygonItem *attack_area;
+    QPointF attack_dest;
 };
 
 #endif // TOWER_H