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Stl question

Pactuul · 2002-06-05T23:43:50

I've been using stl (and boy is it a time saver!) to handle scene management in my game engine. Well i've decided to add a texture manager for the engine using the map stl. i'm mapping using a char* (the name of the file) and a LPDIRECT3DTEXTURE8 like so: map<char*, LPDIRECT3DTEXTURE8> Textures; well i've got it working all nice and fine execpt when I insert things. Like so: typedef pair<char*, LPDIRECT3DTEXTURE8> StrTexPair; Textures.insert(StrTexPair(filename, temp)); //temp is a LPDIRECT3DTEXTURE8 that's been properly created It crashes with a memory read violation. I've spent a good time stepping through line by line (even so in the stl code). I've narrowed it down to where it crashes in the stl code when it tries to retrieve the root node and assign it to a temp value (for it's self). The root() function calls the parent() in the stl and they seem to return NULL's just fine (considering the list is empty when it crashes). i've also changed my map to a list,vector, and queue. they all crash when trying to do the same thing. So my next thought was that LPDIRECT3DTEXTURE8 had something to do with it. i'm i correct in using LPDIRECT3DTEXTURE8? i've even tried using LPDIRECT3DTEXTURE8*, which doesn't work either. So i'm not sure what's up with the memory management on this thing? Anybody got any ideas? -Pac EDIT: boy those source tags can be annoying [edited by - Pactuul on June 3, 2002 2:58:19 PM] [edited by - Pactuul on June 3, 2002 2:59:05 PM]

General and Gameplay Programming Programming

Started by Pactuul June 03, 2002 01:54 PM

12 comments, last by Pactuul 21 years, 10 months ago

Oluseyi

2,123

June 04, 2002 11:57 AM

[tangential but useful:]
While on the topic of simplifying object management (using maps, etc), you might also want to consider using CComPtr to manage all your COM interfaces (DirectX). You''ll never have to call Release or write another SAFE_DELETE macro again. It''s in the &ltaltbase.h> header file, and is a real time saver. You can stick references to them in your map if space is an issue.

Pactuul

122

Author

June 04, 2002 06:37 PM

Oluseyi- while looking for solutions and such in the forums, i''ve seen you talk about the CComPtr(). i''ve read up on it, but i''m not sure how to apply it correctly in my case. In other words, how would you implement into the code correctly?

-Pac "The thing I like about friends in my classes is that they can't access my private members directly." "When listening to some one tell about their problem (whether it's code or not), don't listen to what went right or wrong, but what they assumed....."

IndirectX

122

June 05, 2002 11:00 PM

quote:Original post by Pactuul
Oluseyi- while looking for solutions and such in the forums, i''ve seen you talk about the CComPtr(). i''ve read up on it, but i''m not sure how to apply it correctly in my case. In other words, how would you implement into the code correctly?

In general, you would use CComPtr like so:

  CComPtr <IInterface> interface;CoCreateInstance(..., &interface);// Don''t call Release; CComPtr will call it for you when interface goes out of scope

Keep in mind that you can''t generally use CComPtr in containers because it overloads operator &. I had a big problem with std::vector''s of CComPtr''s of IDirect3DTexture8''s due to this; check my profile for the thread link. There are some code snippets in that thread as well.

---visit #directxdev on afternet <- not just for directx, despite the name

Shannon Barber

1,684

June 05, 2002 11:43 PM

  HRESULT hr;CComPtr <IInterface> pInterface;if(FAILED(hr = pInterface.CoCreate(CLSID_CoInterface))) return hr;pInterface->InterfaceMethod(...);

- The trade-off between price and quality does not exist in Japan. Rather, the idea that high quality brings on cost reduction is widely accepted.-- Tajima & Matsubara

Stl question

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