Added transparency to nodes

drawutils.cpp

@@ -87,3 +87,13 @@ void DrawUtils::draw_line(Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint16 wid
 	cy += dy;
     }
 }
+
+
+bool DrawUtils::transpare(SDL_Surface* surface, int r, int g, int b)
+{
+    if (surface == NULL) return false;
+
+    SDL_SetColorKey(surface, SDL_SRCCOLORKEY|SDL_RLEACCEL, SDL_MapRGB(surface->format, r, g, b));
+
+    return true;
+}

drawutils.h

@@ -13,10 +13,14 @@ class DrawUtils
  public:
     DrawUtils() {}
     static SDL_Surface* load(string file);
+
     static bool draw(SDL_Surface* dest, SDL_Surface* drawable, int x, int y);
     static bool draw(SDL_Surface* dest, SDL_Surface* drawable, int x, int y, 
 		     int x2, int y2, int w, int h);
     static void draw_line(Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint16 width, Uint32 colour, SDL_Surface* dest);
+
+    // transpare (v) - to make transparent
+    static bool transpare(SDL_Surface* surface, int r, int g, int b);
 };
 
 #endif

gamecore.cpp

@@ -47,7 +47,9 @@ bool GameCore::init()
     }
 
     background = DrawUtils::load("background.bmp");
+
     node = DrawUtils::load("node.bmp");
+    DrawUtils::transpare(node, 255, 0, 255);
 
     if (background == NULL || node == NULL)
     {
@@ -63,6 +65,8 @@ bool GameCore::init()
 
 void GameCore::render()
 {
+    DrawUtils::draw(display, background, 0, 0);
+
     list<Vertex> vertices = graph.get_vertices();
     list<Edge> edges = graph.get_edges();
 
@@ -77,7 +81,7 @@ void GameCore::render()
 	 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);
+	DrawUtils::draw_line(e.a.x, e.a.y, e.b.x, e.b.y, 2, 0x000000, display);
     }
 
     SDL_Flip(display);