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DLL Talk / Accessing a 3d object in DBPro memory

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Redmotion
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Posted: 14th Mar 2008 14:59
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Is there somewhere I can find out where and how the data for a 3d object sits inside a running DBPro program when its running? Where does it go once the LOAD OBJECT command is called? Would like to access this via a DLL.

Similar to a lot of other unanswered questions I know, but it would really help...

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IanM
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Posted: 14th Mar 2008 17:43
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There's a function in the DBProBasic3DDebug.dll called ?GetObjectA@@YAPAUsObject@@H@Z
Get the address of this function by using GetProcAddress (the handle is available in the GlobStruct structure).

This function accepts an integer argument for the object id, and returns a pointer to an sObject structure which holds all of the object data. You can get the definitions for that and it's associated structures from the DarkGDK.

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Diggsey
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Posted: 14th Mar 2008 23:37
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Also, if you open the DBP .dll for the particular section you want (in this case Compiler\Plugins\DBProBasic3DDebug.dll) with a utility called dllviewer, you can get a list of available functions. If you then see a function that you want to use, (and you have a version of Visual Studio) you can run a program called 'undname.exe' from the command line, with the function name (?GetObjectA@@YAPAUsObject@@H@Z) and it will tell you the parameters and return type, and everything else about the function You can find undname in VC\bin\undname.exe.

Here is a link to my thread where I asked the exact same question, not so long ago

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IanM
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Posted: 15th Mar 2008 01:23
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Maybe I should have done a search

Anyway, the only thing I'd have to add to that would be that if you want to use a DBPro command from one of the DLLs, to use the resource string as a guide rather than the unmangled name (via undname), as that's a better guide of the parameters. For example, a lot of the plug-in functions use DWORD for strings and you are far better off replacing those with LPCSTR instead (same size parameter, and easier for you to use in your code).

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jinzai
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Posted: 15th Mar 2008 02:16 Edited at: 15th Mar 2008 02:17
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If you have VisualStudio, open the DLL itself, and go straight to the string table. You can order them by ordinal, or by name. DBPro does it the same way a user plug-in does. That is the easiest way I've found.

Just remember that floats are returned as DWORDs, and you cast the returned value using the address-of operator, and casting.

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Redmotion
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Posted: 16th Mar 2008 00:35 Edited at: 16th Mar 2008 00:42
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Cheers for the info. I was hoping to replace the load object command and was looking for into that indicates how it loads a 3d object into a compiled .exe and where and how it registers/points/accesses the data.

Do you have a link to the dllviewer site?

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Diggsey
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Posted: 16th Mar 2008 12:32
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http://www.nirsoft.net/utils/dll_export_viewer.html

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IanM
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Posted: 16th Mar 2008 13:53
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@Redmotion,

In that case, take a look at the code Mike posted in the GDK forum

http://forum.thegamecreators.com/?m=forum_view&t=123392&b=22

The DBPro stuff works in exactly the same way - you just have to translate the GDK function calls to their equivalent functions in the Basic3D DLL.

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