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Created by
Crom, last updated on Jun 16, 2018
1 minute read
Contains area 3D data, including:
- Terrain geometry
- Water geometry
- Grass
- Textures
- If the file is a TRN file:
- Walkmesh geometry, identical to terrain geometry
- If the file is a baked TRX file:
- Walkmesh geometry, modified by placeable walkmeshes and walkmesh cutters
- Pathfinding pre-calculated data
File format
The TRN file format is quite similar to MDB format.
Header struct (12 bytes)
| Type | Name | Description |
|---|---|---|
char[4] | file_type | Always NWN2 |
uint16_t | version_major | |
uint16_t | version_minor | |
uint32_t | packet_count | Number of packets |
PacketKeyTable struct (8 bytes)
| Type | Name | Description |
|---|---|---|
char[4] | type | Packet type name |
uint32_t | offset | Byte offset of the packet from the beginning of the file |
Packet struct (variable length)
| Type | Name | Description |
|---|---|---|
char[4] | type | Packet type name |
uint32_t | size | Packet data size in bytes |
uint8_t[size] | data | Packet data |
Each packet contains different data depending on their type
Packet types
There are 3 types of packets:
TRWH: Terrain Width Height info
TRRN: Terrain geometry info
ASWM: Walkmesh geometry & pathfinding data
WATR: Water geometry info
Source: https://neverwintervault.org/project/nwn2/other/trn-fileformat