Weird rendering coming out of nowhere

[Gandi]

Hey, I've run into some really weird problem while implementing a loading screen. Once you start the game, you see the main menu and when clicking on "start game" it displays the loading state with a green bar while it loads the scene and game specific data (what an incredibly creative idea^^)

 

My main loop looks basically like this: (pseudo code)

while (!AppTerminate())
{
   switch ( GameState )
   {
       case MainMenu:
           DrawMainMenu();
           break;
       case LoadingScreen:
           LoadNextPiece();
           DrawLoadingScreen();
           break;
       case Ingame:
           UpdateFramework();
           RenderFramework();
   }

   Flip();
}

 

Note that during loading stage, I'm not rendering _anything_ except the loading screen, which consists of two images... but it magically blends it with the terrain viewed from the top...

 

I'll show a few images so you can see what I mean:

This is the loading screen before LoadScene() gets called, looks pretty normal (except for the ugly loading bar^^)

 

---

 

This is the loading screen after LoadScene() got called. The terrain you can see is the terrain of the scene loaded.

 

Although this happens to look quite funny, it's definately not what I wanted and I have no idea how to fix this.

 

Any help would be appreciated

Gandi

[wh1sp3r]

looks like, you have to turn blending off or render HUD after rendering a lights

[Gandi]

Alphablending is off but it should not matter because i'm not rendering lights anyway. I just do:

 

LoadScene()

DrawImage( Loadingscreen )

Flip()

[Marleys Ghost]

Have you tried a different order?

 

 

DrawImage( Loadingscreen )

Flip()

LoadScene()

[Josh]

LoadScene()
DrawImage( Loadingscreen )
Flip()

Why would you expect anything to show up when the game is loading with that order of commands? It's probably just displaying whatever random bits are in the video buffer.

 

DrawImage( Loadingscreen )

Flip()

LoadScene()

[Gandi]

LoadScene()
DrawImage( Loadingscreen )
Flip()

Why would you expect anything to show up when the game is loading with that order of commands? It's probably just displaying whatever random bits are in the video buffer.

 

DrawImage( Loadingscreen )

Flip()

LoadScene()

 

LoadScene() should be irrelevant, I draw the image on the back buffer, then I display the back buffer on the monitor using Flip() ... or am I missing something here?

[Niosop]

He's just saying that by the time the DrawImage command is called the Scene has already been loaded. So while the scene is being loaded, nothing is being sent to the video card, so whatever happened to be in video memory is going to be displayed.