DAT2LTA85

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dat2lta85 is a converter from DAT → LTA map format for games built on the Lithtech Jupiter v85 engine (Crossfire, Combat Arms, NOLF2, Face of Mankind, Tron 2.0, Contract Jack, DOB and others).

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# dat2lta85

**dat2lta85** is a converter from **DAT → LTA** map format for games built on the **Lithtech Jupiter v85 engine** (Crossfire, Combat Arms, NOLF2, Face of Mankind, Tron 2.0, Contract Jack, DOB and others).

The project is written in **Python** and inspired by:  
- [Jldevictoria/lithdat](https://github.com/Jldevictoria/lithdat)  
- [jsj2008/lithtech PreProcessor](https://github.com/jsj2008/lithtech/tree/master/tools/PreProcessor)

I am not a professional programmer, so the code is kept in a single file. My goal was simply to make it possible to convert DAT maps into LTA. I hope this tool helps other developers create more advanced converters and supports the Lithtech community.

---

## Usage

1. Extract resources from the game (rez) and place them into the **Game** folder of the DEdit editor.  
2. Copy maps into the **Worlds** folder.  
3. Place the converter itself into the **Worlds** folder as well.  
4. Open a console and navigate to this folder.  
5. Run:

If using the exe build:  
```bash
dat2lta85 %mapname%.dat -v1
```

If using the Python script:  
```bash
python dat2lta85.py %mapname%.dat -v1
```

-v1 — use this for DAT maps with tangent and binormal (Combat Arms, Crossfire, NOLF2, etc).

-v2 — use this for DAT maps without tangent and binormal (Contract Jack, Tron 2.0, etc).

---

## Output

After conversion, three files will appear in the folder:

- **mapname.lta** — main triangulated map with UVs. This is the primary file for editing and compiling.  
- **mapname_PhysicsDATA.lta** — contains the WorldTree section. It is a non-triangulated version of the original with proper brush properties but without UVs. Ideally, brush properties should be copied from here into the main LTA manually.  
- **mapname.txt** — debug information about the world, useful for identifying conversion issues.

---

## Important details

- `mapname.lta` preserves **TextureEffect** for each brush if present.  
- `mapname_PhysicsDATA.lta` contains other brush properties.  
- All **RenderNode** and **WorldModel** objects are automatically assigned `Detail 0` and `AmbientLight 0 0 0`. For more accurate values, refer to the original **JUNK_FLEA** map which is available in open form.  
<img width="882" height="570" alt="13" src="https://github.com/user-attachments/assets/26ce72f5-ee19-4e55-9c20-4585195c293c" />

---

## Working with FX

For proper FX handling, place additional files into the **Game** folder of DEdit.

### For Combat Arms

This repository provides example FX files and maps to illustrate proper usage:

- **JUNK_FLEA.7z** — original map file for Combat Arms.  
  [Download JUNK_FLEA.7z](https://www.mediafire.com/file/kwp9cdcf6pef9yl/JUNK_FLEA.7z/file)

- **CAclassic_DEdit.7z** — DEdit project files for Combat Arms.  
  [Download CAclassic_DEdit.7z](https://www.mediafire.com/file/7zbv05ozz6fwrea/CAclassic_DEdit.7z/file)

Place these files into your DEdit project folder to test and convert maps.

### For Crossfire

This repository provides example FX files and maps to illustrate proper usage:

- **MEXICO.lta** — example map file for Crossfire. This is not the original map, but a version adjusted by me to serve as a reference for usage and testing in DEdit.
  [Download MEXICO.lta](https://www.mediafire.com/file/4glg53d64i0bsz2/MEXICO.lta/file)

- **Crossfire_Dedit.7z** — DEdit project files for Crossfire.  
  [Download Crossfire_Dedit.7z](https://www.mediafire.com/file/8im90f64u0q5497/Crossfire_Dedit.7z/file)

Place these files into your DEdit project folder to test and convert maps.

### For Other Lithtech Jupiter Games

For other Lithtech Jupiter games, place the corresponding files from your game into the DEdit project, for example:

- `ClientFX.fxd`
- `CShell.dll`
- `Object.lto`
- Folders `ClientFX` and `Attributes` (if present)

All files must be in decrypted form to work correctly.

- If **CLIENTFX.FXF** and **CLIENTFX.FCF** contain valid FX, you can safely click **Yes** when opening the map in DEdit.  
- If those FX are missing, choosing **Yes** will make DEdit delete all FX names from the map.  
- If you choose **No**, the FX names will remain untouched.

---

## Dynamic Occluders

The converter can also detect **Occluder** names.  
- If the occluder is named **"Occluder"**, it is a regular occluder.  
- If the name differs, it means it is used by a **DynamicOccluder** object.

---

I hope this tool will be a helpful step for modders and bring new life into projects built on Lithtech Jupiter.

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