INST

INST (IPL section)

Short description:	Used to place objects in the world
Supported games:	GTA III GTA VC GTA SA GTA IV
IPL Sections: 2DFX • AUZO • BLOK • CARS • CULL • ENEX • GRGE INST • JUMP • LINK • LODM • MLO+ • MULT • OCCL PATH • PICK • RTFX • SLOW • TCYC • VNOD • ZONE

INST is one of the IPL sections. It is used to place static and dynamic objects in the world. It is supported by all major pc scions of the GTA 3d series, but it's format differes between the games.

GTA III format

ID, ModelName, PosX, PosY, PosZ, ScaleX, ScaleY, ScaleZ, RotX, RotY, RotZ, RotW

Identifier	Description
ID	A number which is used to identify the object inside the map system.
ModelName	The name of the model inside an image file which is defined in the gta.dat file without extension (.dff)
PosX, PosY, PosZ	The position of the object in the world as floating point values. Note: the decimal seperator must be ".", not ",".
ScaleX, ScaleY, ScaleZ	The scaling of the object as floating point values. By default each value is 1.0, which means the object is not scaled at all. Note: the decimal seperator must be ".", not ",".
RotX, RotY, RotZ, RotW	The rotation of the object as quarternion. Note: the decimal seperator must be ".", not ",".

GTA VC format

ID, ModelName, Interior, PosX, PosY, PosZ, ScaleX, ScaleY, ScaleZ, RotX, RotY, RotZ, RotW

Identifier	Description
ID	A number which is used to identify the object inside the map system.
ModelName	The name of the model inside an image file which is defined in the gta.dat file without extension (.dff)
Interior	A number defining the interior (render-level) the object is located in.
PosX, PosY, PosZ	The position of the object in the world as floating point values.
ScaleX, ScaleY, ScaleZ	The scaling of the object as floating point values. By default each value is 1.0, which means the object is not scaled at all.
RotX, RotY, RotZ, RotW	The rotation of the object as quarternion.

GTA SA format

ID, ModelName, Interior, PosX, PosY, PosZ, RotX, RotY, RotZ, RotW, LOD

Identifier	Description
ID	A number which is used to identify the object inside the map system.
ModelName	The name of the model inside an image file which is defined in the gta.dat file without extension (.dff)
Interior	A number defining the interior (render-level) the object is located in.
PosX, PosY, PosZ	The position of the object in the world as floating point values.
RotX, RotY, RotZ, RotW	The rotation of the object as quarternion. Note: the decimal seperator must be ".", not ",".
LOD	The number of the LOD which is located inside the same instance block as the current model. By default this is -1 which means no LOD is defined.[1]

GTA IV format

This section is incomplete. You can help by fixing and expanding it.

Limitations

Each game got different limitations. The most important limit for the instance section is the so called map boundary which is an notional boundary around the map. Outside those borders no objects will be visible. If an object is intersecting the bounds it may be displayed wrong.

Game	Mapping Boundary
	San Andreas has got a square (or cube) as the major limit. It's dimension is 3000.0 units away from the origin point. This limit can be increased using the SA Limit Adjuster by Sacky

References

• ^  GTAForums: Explanation of GTA SA LOD System - Post by steve-m explaining the LOD system for IPL files in GTA SA.

Links

• Item placement file format specification
• SA Limit Adjuster – by Sacky