Difference between revisions of "VTable"
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(Added GTAIV specific info on why VTable pointer values are useful.) |
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*At its simplest, a VTable is an array of pointers to functions. VTables are sometimes referred to as VFTables (or Virtual Function Tables) or VMTs (Virtual Method Tables). Any class/struct object with virtual methods contains an internal pointer to a VTable. The VTable layout is implementation dependent, and may frequently contain type metadata (to support DynamicCast) and correction factors needed to support MultipleInheritance. | *At its simplest, a VTable is an array of pointers to functions. VTables are sometimes referred to as VFTables (or Virtual Function Tables) or VMTs (Virtual Method Tables). Any class/struct object with virtual methods contains an internal pointer to a VTable. The VTable layout is implementation dependent, and may frequently contain type metadata (to support DynamicCast) and correction factors needed to support MultipleInheritance. | ||
| − | GTA:IV's resource data files often contain structures that are a direct memory dump of a complete class/structure in memory. These classes are sometimes virtual classes and often contain a VTable pointer in them. When the data is loaded into memory, the data is relocated and VTable pointer is corrected to the proper one by the game. It is important to note that the VTable pointer value will change depending on the exact build/version of the resource compiler used. They are a helpful indicator to identify data structures in files. However, that's all they are -- indicators. | + | *GTA:IV's resource data files often contain structures that are a direct memory dump of a complete class/structure in memory. These classes are sometimes virtual classes and often contain a VTable pointer in them. When the data is loaded into memory, the data is relocated and VTable pointer is corrected to the proper one by the game. It is important to note that the VTable pointer value will change depending on the exact build/version of the resource compiler used. They are a helpful indicator to identify data structures in files. However, that's all they are -- indicators. |
==Documentation== | ==Documentation== | ||
Revision as of 02:39, 12 August 2009
VTable Description
- At its simplest, a VTable is an array of pointers to functions. VTables are sometimes referred to as VFTables (or Virtual Function Tables) or VMTs (Virtual Method Tables). Any class/struct object with virtual methods contains an internal pointer to a VTable. The VTable layout is implementation dependent, and may frequently contain type metadata (to support DynamicCast) and correction factors needed to support MultipleInheritance.
- GTA:IV's resource data files often contain structures that are a direct memory dump of a complete class/structure in memory. These classes are sometimes virtual classes and often contain a VTable pointer in them. When the data is loaded into memory, the data is relocated and VTable pointer is corrected to the proper one by the game. It is important to note that the VTable pointer value will change depending on the exact build/version of the resource compiler used. They are a helpful indicator to identify data structures in files. However, that's all they are -- indicators.
Documentation
Possible values of a VTable
| Name | Decimal | Hex | Description |
|---|---|---|---|
| DrawableModel | 6902356 | 0x54526900 | WDR Header |
| DrawableDictionary | 6902692 | 0xA4536900 | WDD Header |
| Geometry | 7031028 | 0xF4486B00 | Start of Geometry |
| VertexBuffer | 7060184 | 0xD8BA6B00 | Start of VertexBuffer |
| IndexBuffer | 7059568 | 0x70B86B00 | Start of IndexBuffer |
| ShaderGroup | 7018052 | 0x44166B00 | Start of ShaderGroup |
| Shader | 7021116 | 0x3C226B00 | Start of Shader |
| Boundries | 6902624 | 0x60536900 | WBD Header |
| TextureDictionary | 6949024 | 0xA0086A00 | WTD Header |
This section is incomplete. You can help by fixing and expanding it.
 Grand Theft Auto IV | |
|---|---|
| File Formats | .dat • .gxt • .ide • .img • .ipl • .nod • .sco • .rpf • .rrr • .wad • .wbd/.wbn • .wdd • .wdr • .wft • .whm • .wpl • .wtd |
| Documentation | Audio • Bink Video • Cryptography • Cutscenes • GXT Text • Image listing • Keycodes • Map Listing • Native functions • Paths • Radar Blips • Radio Stations • Saves • Scenarios • VTable • Weapons |
| Tools | ASI Loader • ENBSeries • G-Texture • GIMS IV • Ingame WPL Editor • IV Needle • OpenIV • SparkIV • XLiveLess • WPL Manager • X Mod Installer Alice • C++ Script Hook • .NET Script Hook • Scocl |
| Tutorials | Importing Textures with OpenIV • Importing Textures with SparkIV |
| Modifications | GTA Connected • Gostown IV • Four Multiplayer • IV Multiplayer • CitizenMP:IV Reloaded |
| Useful links | Community portal • Discussion forums • Modding forums • Mods on GTAGarage.com |
