AbstractClass

The AbstractClass is the interface of the game's object controlling classes.
That means a AbstractClass instance itself would be virtually useless, it rather provides a basic framework for all the derivative classes to work on.

Class specifications

Property	Value
General:
Derivation	IUnknown → IPersist → IPersistStream (ignored in later derivations)
GUID	none
VT address (YR 1.001)	0x7E1F50
Size of member data (YR 1.001)	0x24 bytes
AbstractClass derivative:
AbstractDerivation ID	none

Member variables

Offset	Type	Name	Description
AbstractClass:
0x0	ptr	VirtualTable	Pointer to the class's Virtual Table
0x4	ptr	IRTTITypeInfo VTable	Pointer to an extended VTable (not sure what exactly it does)
0x8	ptr	INoticeSink VTable	Pointer to an extended VTable (not sure what exactly it does)
0xC	ptr	INoticeSource VTable	Pointer to an extended VTable (not sure what exactly it does)
0x10	DWORD	unknown
0x14	DWORD	DerivationFlags	Bit 0: set if the instance is or derives from a TechnoClass Bit 1: set if the instance is or derives from a ObjectClass Bit 2: set if the instance is or derives from a FootClass
0x18	DWORD	unknown
0x1C	DWORD	unknown
0x20	bool	Dirty	Was the object changed since it was last saved?
0x21	BYTE	unused
0x22	WORD	unused

Virtual Table

Offset	Return Type	Name	Arguments	Description
IUnknown:
0x0	HRESULT	QueryInterface	REFIID iid void ** ppvObject	MSDN: "Returns a pointer to a specified interface on an object to which a client currently holds an interface pointer."
0x4	ULONG	AddRef	none	MSDN: "[...] increments the reference count for an interface on an object. It should be called for every new copy of a pointer to an interface on a given object."
0x8	ULONG	Release	none	MSDN: "Decrements the reference count for the calling interface on a object. If the reference count on the object falls to 0, the object is freed from memory."
IPersist:
0xC	HRESULT	GetClassID	CLSID * pClassID	MSDN: "Retrieves the class identifier (CLSID) of an object. The CLSID is a unique value that identifies the code that can manipulate the persistent data."
IPersistStream:
0x10	HRESULT	IsDirty	none	MSDN: "Checks the object for changes since it was last saved."
0x14	HRESULT	Load	IStream* stream AbstractClass* dst	MSDN: "Initializes an object from the stream where it was previously saved."
0x18	HRESULT	Save	IStream* stream AbstractClass* src (3rd is unknown)	MSDN: "Saves an object to the specified stream."
0x1C	HRESULT	GetMaxSize	ULARGE_INTEGER * pcbSize	MSDN: "Returns the size in bytes of the stream needed to save the object."
AbstractClass:
0x20	none (DTOR)	Destructor	none	Frees memory and removes this instance from global arrays.
0x24	unknown	unknown	unknown
0x28	unknown	unknown	unknown
0x2C	int	GetAbstractDerivationID	none	Gets the AbstractDerivationID of this class. Used to find out "what something is".
0x30	int	GetSize	none	Gets the size of the member data.
0x34	unsigned long	GetCRC	unknown	Calculates a CRC sum of this instance.
0x38	int	GetOwningHouseIndex	none	Gets the index of the House (player) who owns this object.
0x3C	HouseClass*	GetOwningHouse	none	Gets a pointer to the House (player) who owns this object.
0x40	int	GetArrayIndex	none	Gets the index of this class instance in the global array. This will return 0 for abstract classes.
0x44	bool	IsDead	none	Finds out whether this instance is dead. This is only used for "living" objects with a health.
0x48	void	Get3DCoords	int* dst_xyz	Loads 3D coordinates into dst_xyz.
0x4C	void	Get3DCoords_var	int* dst_xyz	Loads 3D coordinates into variables, then into dst_xyz. This method is obsolete (use 0x48).
0x50	unknown	unknown	unknown
0x54	unknown	unknown	unknown
0x58	unknown	unknown	unknown
0x5C	void	AdvanceFrame	none	This is an updating routine, called every frame.