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Bubblegum Engine error

Glenn Latomme · 2011-12-22T12:58:43

Hi, i recently started to build an engine in order to learn more how i should program a game(engine) next year when I need to make a game for school. now I only have had lessons in basic C++ with an 2D engine from school, which I can use as reference for making this one, and had like 2 lessons in the win32 environment the rest of the time i was just messing around with it. now it's just a basic Direct2D engine, but the plans are there for switching to Dx when I get this one up and running. so if there is stuff not very clear why I did it, feel free to say it that I can look in to it, and if needed [subheading]Second Problem [SOLVED][/subheading]See: click here [subheading]First Problem [SOLVED][/subheading][spoiler]the problem occurs when I try to build it, I don't know why this is happening, never had that error before if anyone knows why, could you please tell my where my problem is, and if possible a solution (and preferably an explanation what I did wrong to learn from my mistakes) EDIT: woops forgot to mention the error Error 1 error LNK2019: unresolved external symbol "public: __thiscall AGame::AGame(void)" (??0AGame@@QAE@XZ) referenced in function "public: __thiscall FirstGame::FirstGame(void)" (??0FirstGame@@QAE@XZ) E:\Programming\C++\Bubblegum\V0.01\MyFirstEngineGame.obj Error 2 error LNK2019: unresolved external symbol "public: virtual __thiscall AGame::~AGame(void)" (??1AGame@@UAE@XZ) referenced in function "public: virtual __thiscall FirstGame::~FirstGame(void)" (??1FirstGame@@UAE@XZ) E:\Programming\C++\Bubblegum\V0.01\MyFirstEngineGame.obj Error 3 error LNK1120: 2 unresolved externals E:\Programming\C++\Bubblegum\V0.01\Debug\Bubblegum.exe 1 [/spoiler] Greetings Glenn.

General and Gameplay Programming Programming

Started by GlennLatomme December 21, 2011 11:50 PM

15 comments, last by GlennLatomme 12 years, 3 months ago

turbello

115

December 22, 2011 12:16 PM

Something is not going to work.

Your Initialize() method is returning an integer. 'SUCCEEDED' don't check that.
You can do this:

if( engine.Initialize() ) // this automatically gives a 0 == true

{

  engine.ProgramLoop();

}

Or you can do this:

HRESULT Initialize()

{

 HRESULT hr;



 // Initialize the engine



 return hr;

}

GlennLatomme

100

Author

December 22, 2011 12:31 PM

Something is not going to work.

Your Initialize() method is returning an integer. 'SUCCEEDED' don't check that.
You can do this:
if( engine.Initialize() ) // this automatically gives a 0 == true { engine.ProgramLoop(); }
Or you can do this:
HRESULT Initialize() { HRESULT hr; // Initialize the engine return hr; }

Got some questions with that.
as you could see i did try { } catch { }
so if it wasn't succesfull it would go to quitwithError(), witch will exit the programm, so if it returns a value it must be a succsessfull creation.

and I tried adding the HRESULT, but it say's that is wasn't initialized
But i wouldn't know what value to put in the hr.

[quote name='Koenig, Frederick']"We tend to forget that happiness doesn't come as a result of getting something we don't have, but rather of recognizing and appreciating what we do have"[/quote]

turbello

115

December 22, 2011 12:47 PM

If you use try - catch and exit when it fails, you don't need to return anything. You don't need to check if the initialization was succeeded because if it wasn't you would already have exited the application.

If you want to keep that try - catch, don't return anything because the return is useless.

If you want to use the HRESULT, here is an example of using it:

HRESULT hr;

hr = RegisterClass( &wndClass );  // this should work  

return hr;

The value that will be put into hr depends: HRESULT values

GlennLatomme

100

Author

December 22, 2011 12:53 PM

If you use try - catch and exit when it fails, you don't need to return anything. You don't need to check if the initialization was succeeded because if it wasn't you would already have exited the application.

If you want to keep that try - catch, don't return anything because the return is useless.

If you want to use the HRESULT, here is an example of using it:

HRESULT hr; hr = RegisterClass( &wndClass ); // this should work return hr;
The value that will be put into hr depends: HRESULT values

Thanks,
but i still have my error: here

[quote name='Koenig, Frederick']"We tend to forget that happiness doesn't come as a result of getting something we don't have, but rather of recognizing and appreciating what we do have"[/quote]

Jansic

251

December 22, 2011 12:56 PM

0xFEEEFEEE is the fill MSVC uses when something is freed. i.e. it's trying to delete something that has already been deleted.

A quick glance at the code shows the AGame pointer is deleted both outside the class (in main) and in the destructor for the MainEngine class - which is probably the issue...

Jans.

turbello

115

December 22, 2011 12:57 PM

I can see you are deleting the object in the destructor of the MainEngine. And thereafter you delete the same object again at the end of the WinMain..

GlennLatomme

100

Author

December 22, 2011 12:58 PM

0xFEEEFEEE is the fill MSVC uses when something is freed. i.e. it's trying to delete something that has already been deleted.

A quick glance at the code shows the AGame pointer is deleted both outside the class (in main) and in the destructor for the MainEngine class - which is probably the issue...

Jans.

Hmm now you say it, the m_abstractGamePtr is just a pointer not a new object, so I didn't have to delete it, thx!

[quote name='Koenig, Frederick']"We tend to forget that happiness doesn't come as a result of getting something we don't have, but rather of recognizing and appreciating what we do have"[/quote]

Bubblegum Engine error

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