First implementation of game logic and control

gamecore.cpp

@@ -8,6 +8,8 @@
 GameCore::GameCore()
 {
     display = NULL;
+    background = NULL;
+    node = NULL;
     is_running = true;
 }
 
@@ -44,13 +46,41 @@ bool GameCore::init()
 	return false;
     }
 
+    background = DrawUtils::load("background.bmp");
+    node = DrawUtils::load("node.bmp");
+
+    if (background == NULL || node == NULL)
+    {
+#ifdef DEBUG
+	std::cerr << "GameCore::init(): error: Couldn't load an image file\n";
+#endif
+	return false;
+    }
+
     return true;
 }
 
 
 void GameCore::render()
 {
+    list<Vertex> vertices = graph.get_vertices();
+    list<Edge> edges = graph.get_edges();
 
+    for (list<Vertex>::iterator cursor = vertices.begin();
+	 cursor != vertices.end(); cursor++)
+    {
+	Vertex v = *cursor;
+	DrawUtils::draw(display, node, v.x_min, v.y_min);
+    }
+
+    for (list<Edge>::iterator cursor = edges.begin();
+	 cursor != edges.end(); cursor++)
+    {
+	Edge e = *cursor;
+	DrawUtils::draw_line(e.a.x, e.a.y, e.b.x, e.b.y, 2, 0xffffff, display);
+    }
+
+    SDL_Flip(display);
 }
 
 
@@ -62,6 +92,8 @@ void GameCore::iterate()
 
 void GameCore::cleanup()
 {
+    SDL_FreeSurface(background);
+    SDL_FreeSurface(node);
     SDL_FreeSurface(display);
     SDL_Quit();
 }
@@ -71,3 +103,9 @@ void GameCore::on_exit()
 {
     is_running = false;
 }
+
+
+void GameCore::on_lbutton_down(int x, int y)
+{
+    graph.add_vertex(x, y, 25);
+}