OBJS

OBJS (IDE section)

Supported games:	GTA III, GTA VC, GTA SA, GTA IV
Brief description:	Used to define standard map objects
IDE Sections: 2DFX • AMAT • ANIM • CARS • HIER • HAND • MLO • OBJS PATH • PEDS • TANM • TOBJ • TREE • TXDP • WEAP

OBJS is a section in the item definition file. It is used to define standard map objects. There are also sections to extend default object definitions:

• TOBJ for defining an additional ingame time range the object gets rendered in.
• ANIM which links an animation to an object.
• TANM which does both of the previously mentioned sections.

Format

GTA III, Vice City and San Andreas

Type 0

This type was never used in the game.

	Identifier	Type	Description
A	ID	integer	Unique object ID.
B	ModelName	string	Name of the .dff model file without extension.
C	TextureName	string	Name of the .txd texture dictionary without extension.
D	ObjectCount?	integer	Number of clumps?

Type 1

This is the most common type used in the game.

	Identifier	Type	Description
A	ID	integer	Unique object ID.
B	ModelName	string	Name of the .dff model file without extension.
C	TextureName	string	Name of the .txd texture dictionary without extension.
D	ObjectCount	integer	Number of clumps. 1 for this type.
E	DrawDistance	float	Draw distance in units.
F	Flags	integer	Object flags (see below).

Type 2

This is used for breakable objects.

	Identifier	Type	Description
A	ID	integer	Unique object ID.
B	ModelName	string	Name of the .dff model file without extension.
C	TextureName	string	Name of the .txd texture dictionary without extension.
D	ObjectCount	integer	Number of clumps. 2 for this type.
E,F	DrawDistance1, DrawDistance2	float[2]	Draw distance in units (one for each clump).
G	Flags	integer	Object flags (see below).

Type 3

This is used for complex breakable objects.

	Identifier	Type	Description
A	ID	integer	Unique object ID.
B	ModelName	string	Name of the .dff model file without extension.
C	TextureName	string	Name of the .txd texture dictionary without extension.
D	ObjectCount	integer	Number of clumps. 3 for this type.
E,F,G	DrawDistance1, DrawDistance2, DrawDistance3	float[3]	Draw distance in units (one for each clump).
H	Flags	integer	Object flags (see below).

Type 4

This is used for objects with only 1 clump. San Andreas uses this almost exclusively.

	Identifier	Type	Description
A	ID	integer	Unique object ID.
B	ModelName	string	Name of the .dff model file without extension.
C	TextureName	string	Name of the .txd texture dictionary without extension.
D	DrawDistance	float	Draw distance in units.
E	Flags	integer	Object flags (see below).

GTA IV

Type 1

	Identifier	Type	Description
A	ModelName	string	Name of the .wdr model file without extension.
B	TextureName	string	Name of the .wtd texture dictionary without extension.
C	DrawDistance	float	Draw distance in units.
D	Flag1	integer	Object flag (see below).
E	Unknown	float	Unknown integer (usually 0 but uses other values as high as 32).
F,G,H	MinX, MinY, MinZ	float[3]	Lower left corner of the bounding box for the object.
I,J,K	MaxX, MaxY, MaxZ	float[3]	Upper right corner of the bounding box for the object.
L,M,N	SphereX, SphereY, SphereZ	float[3]	Center of the bounding sphere for the object.
O	Radius	float[3]	Radius of the bounding sphere into all dimensions.
P	LODModel	string	Name of the .wdd file that contains the lod model for the defined modelname; otherwise null.

GTA IV stores bounding information inside the item definitions for better performance. The previous games stored bounding information inside the collision files. Also it uses the hashes of the model names as a key of an hash table instead of the ID as an index to the definition array for previous games.

Object flags

Flags are used to specify the behaviour of objects. They are signed 32-bit integer values where each bit describes a boolean value of an special aspect.

Flag	Supported games	Binary	Description
-1	–	1111 1111 1111 1111 1111 1111	Enables all flags.[a] Never used by default.
1		0000 0000 0000 0000 0000 0001	Wet effect (objects appear darker).
2		0000 0000 0000 0000 0000 0010	Do not fade the object when it is being loaded into or out of view.
4		0000 0000 0000 0000 0000 0100	Allow transparencies of other objects to be visible through this object.
8		0000 0000 0000 0000 0000 1000	Alpha transparency 2
16		0000 0000 0000 0000 0001 0000	Opposite to flag 2
32		0000 0000 0000 0000 0010 0000	Indicates an object to be used inside an interior.
64		0000 0000 0000 0000 0100 0000	Disables the shadow mesh to project a shadow; allow transparencies of other objects, shadows, and lights to be visible through this object.
128		0000 0000 0000 0000 1000 0000	Object surface will not be culled.
256		0000 0000 0000 0001 0000 0000	Disables draw distance (Only used for LOD objects with an LOD value greater than 299).
512		0000 0000 0000 0010 0000 0000	Object is breakable (like glass – additional parameters defined inside the object.dat file, otherwise there is no effect).
1024		0000 0000 0000 0100 0000 0000	Similar to flag 512: object first cracks on a strong collision, then it breaks (does also require object.dat registration).
2048		0000 0000 0000 1000 0000 0000	Indicates an object as an garage door (for more information see GRGE – requires object.dat registration).
4096		0000 0000 0001 0000 0000 0000	Indicates a multi mesh object (Object switches from mesh 2 to mesh 1 after collision – requires object.dat registration).
16384		0000 0000 0100 0000 0000 0000	Indicates a vegetation object (Object moves in wind).
32768		0000 0000 1000 0000 0000 0000	Uses object brightness from the current weather definition (See timecyc.dat – PoleShd).
65536		0000 0001 0000 0000 0000 0000	Object explodes after getting hit (requires object.dat registration).
131072		0000 0010 0000 0000 0000 0000	Unknown – apparently some flag for the Script.
262144		0000 0100 0000 0000 0000 0000	Unknown – only used 1 time in San Andreas.
1048576		0000 1000 0000 0000 0000 0000	Object will switch from mesh 2 to mesh 1 after getting sprayed by the player (graffity flag).
2097152		0001 0000 0000 0000 0000 0000	Disables backface culling – as an result the texture will be drawed on both sides of the model (Always enabled for GTA III and Vice City)
4194304		0010 0000 0000 0000 0000 0000	Unknown – apparently related into physics.
edit

• ^ Two's complement

Statistics

Total number of OBJS entries in:

GTA III: 2908

Type 1: 2844

Type 2: 63

Type 3: 1

Vice City: 3800

Type 1: 3761

Type 2: 38

Type 3: 1

San Andreas: 14052

Type 1: 1

Type 4: 14051

GTA IV: 24820

See also

• TOBJ
• ANIM
• TANM