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Added lua exporting

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This commit is contained in:
jracek
2025-04-09 22:20:52 +02:00
parent 765575d7ae
commit b3da188438
10 changed files with 161 additions and 34 deletions
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15
Editor/LuaFileAssetEditor.cs Normal file
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@@ -0,0 +1,15 @@
using Splashedit.RuntimeCode;
using UnityEditor;
using UnityEngine;
[CustomEditor(typeof(LuaFile))]
public class LuaScriptAssetEditor : Editor
{
public override void OnInspectorGUI()
{
LuaFile luaScriptAsset = (LuaFile)target;
// Allow user to drag-and-drop the Lua file
luaScriptAsset.luaScript = (TextAsset)EditorGUILayout.ObjectField("Lua Script", luaScriptAsset.luaScript, typeof(TextAsset), false);
}
}

2
Editor/LuaFileAssetEditor.cs.meta Normal file
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@@ -0,0 +1,2 @@
fileFormatVersion: 2
guid: 32c0501d523345500be12e6e4214ec9d

17
Editor/LuaImporter.cs Normal file
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@@ -0,0 +1,17 @@
using UnityEngine;
using System.IO;
using UnityEditor.AssetImporters;
namespace SplashEdit.EditorCode
{
[ScriptedImporter(1, "lua")]
class LuaImporter : ScriptedImporter
{
public override void OnImportAsset(AssetImportContext ctx)
{
var asset = new TextAsset(File.ReadAllText(ctx.assetPath));
ctx.AddObjectToAsset("Text", asset);
ctx.SetMainObject(asset);
}
}
}

2
Editor/LuaImporter.cs.meta Normal file
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@@ -0,0 +1,2 @@
fileFormatVersion: 2
guid: d364a1392e3bccd77aca824ac471f89c

11
Runtime/LuaFile.cs Normal file
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@@ -0,0 +1,11 @@
using UnityEngine;
namespace Splashedit.RuntimeCode
{
[CreateAssetMenu(fileName = "NewLuaScript", menuName = "Lua Script", order = 1)]
public class LuaFile : ScriptableObject
{
public TextAsset luaScript;
}
}

2
Runtime/LuaFile.cs.meta Normal file
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@@ -0,0 +1,2 @@
fileFormatVersion: 2
guid: e3b07239f3beb7a87ad987c3fedae9c1

2
Runtime/PSXObjectExporter.cs
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@@ -1,4 +1,5 @@
using System.Collections.Generic;
using Splashedit.RuntimeCode;
using UnityEngine;
namespace SplashEdit.RuntimeCode
@@ -7,6 +8,7 @@ namespace SplashEdit.RuntimeCode
public class PSXObjectExporter : MonoBehaviour
{
public PSXBPP BitDepth = PSXBPP.TEX_8BIT; // Defines the bit depth of the texture (e.g., 4BPP, 8BPP)
public LuaFile luaFile;
public List<PSXTexture2D> Textures { get; set; } = new List<PSXTexture2D>(); // Stores the converted PlayStation-style texture
public PSXMesh Mesh { get; set; } // Stores the converted PlayStation-style mesh

65
Runtime/PSXSceneExporter.cs
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@@ -2,6 +2,7 @@ using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Splashedit.RuntimeCode;
using UnityEditor;
using UnityEngine;
@@ -83,6 +84,10 @@ namespace SplashEdit.RuntimeCode
string path = EditorUtility.SaveFilePanel("Select Output File", "", "output", "bin");
int totalFaces = 0;
// Lists for lua data offsets.
List<long> luaOffsetPlaceholderPositions = new List<long>();
List<long> luaDataOffsets = new List<long>();
// Lists for mesh data offsets.
List<long> meshOffsetPlaceholderPositions = new List<long>();
List<long> meshDataOffsets = new List<long>();
@@ -100,6 +105,7 @@ namespace SplashEdit.RuntimeCode
List<long> navmeshDataOffsets = new List<long>();
int clutCount = 0;
List<LuaFile> luaFiles = new List<LuaFile>();
// Cluts
foreach (TextureAtlas atlas in _atlases)
@@ -113,12 +119,26 @@ namespace SplashEdit.RuntimeCode
}
}
// Lua files
foreach (PSXObjectExporter exporter in _exporters)
{
if (exporter.luaFile != null)
{
//if not contains
if (!luaFiles.Contains(exporter.luaFile))
{
luaFiles.Add(exporter.luaFile);
}
}
}
using (BinaryWriter writer = new BinaryWriter(File.Open(path, FileMode.Create)))
{
// Header
writer.Write('S'); // 1 byte // 1
writer.Write('P'); // 1 byte // 2
writer.Write((ushort)1); // 2 bytes - version // 4
writer.Write((ushort)luaFiles.Count); // 2 bytes - padding // 6
writer.Write((ushort)_exporters.Length); // 2 bytes // 6
writer.Write((ushort)_navmeshes.Length); // 8
writer.Write((ushort)_atlases.Length); // 2 bytes // 10
@@ -134,6 +154,16 @@ namespace SplashEdit.RuntimeCode
writer.Write((ushort)PSXTrig.ConvertCoordinateToPSX(_playerHeight, GTEScaling)); // 26
writer.Write((ushort)0);
writer.Write((ushort)0);
// Lua file section
foreach (LuaFile luaFile in luaFiles)
{
// Write placeholder for lua file data offset and record its position.
luaOffsetPlaceholderPositions.Add(writer.BaseStream.Position);
writer.Write((int)0); // 4-byte placeholder for mesh data offset.
writer.Write((uint)luaFile.luaScript.text.Length);
}
// GameObject section (exporters)
foreach (PSXObjectExporter exporter in _exporters)
@@ -159,7 +189,15 @@ namespace SplashEdit.RuntimeCode
writer.Write((int)rotationMatrix[2, 2]);
writer.Write((ushort)exporter.Mesh.Triangles.Count);
writer.Write((ushort)0);
if (exporter.luaFile != null)
{
int index = luaFiles.IndexOf(exporter.luaFile);
writer.Write((short)index);
}
else
{
writer.Write((short)-1);
}
}
// Navmesh metadata section
@@ -205,6 +243,17 @@ namespace SplashEdit.RuntimeCode
// Start of data section
// Lua data section: Write lua file data for each exporter.
foreach (LuaFile luaFile in luaFiles)
{
AlignToFourBytes(writer);
// Record the current offset for this lua file's data.
long luaDataOffset = writer.BaseStream.Position;
luaDataOffsets.Add(luaDataOffset);
writer.Write(luaFile.luaScript.bytes);
}
// Mesh data section: Write mesh data for each exporter.
foreach (PSXObjectExporter exporter in _exporters)
{
@@ -337,6 +386,20 @@ namespace SplashEdit.RuntimeCode
}
// Bacfill the lua data offsets into the metadata section.
if (luaOffsetPlaceholderPositions.Count == luaDataOffsets.Count)
{
for (int i = 0; i < luaOffsetPlaceholderPositions.Count; i++)
{
writer.Seek((int)luaOffsetPlaceholderPositions[i], SeekOrigin.Begin);
writer.Write((int)luaDataOffsets[i]);
}
}
else
{
Debug.LogError("Mismatch between metadata lua offset placeholders and lua data blocks!");
}
// Backfill the mesh data offsets into the metadata section.
if (meshOffsetPlaceholderPositions.Count == meshDataOffsets.Count)
{

75
doc/splashbundle.md
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@@ -10,24 +10,32 @@ All numeric values are stored in little‐endian format. All offsets are counted
| ------ | ---- | ------ | ----------------------------------- |
| 0x00 | 2 | char | `'SP'` – File magic |
| 0x02 | 2 | uint16 | Version number |
| 0x04 | 2 | uint16 | Number of GameObjects |
| 0x06 | 2 | uint16 | Number of Navmeshes |
| 0x08 | 2 | uint16 | Number of Texture Atlases |
| 0x0A | 2 | uint16 | Number of CLUTs |
| 0x0C | 2 | uint16 | Player Start X |
| 0x0E | 2 | uint16 | Player Start Y |
| 0x10 | 2 | uint16 | Player Start Z |
| 0x12 | 2 | uint16 | Player Rotation X |
| 0x14 | 2 | uint16 | Player Rotation Y |
| 0x16 | 2 | uint16 | Player Rotation Z |
| 0x18 | 2 | uint16 | Player Height |
| 0x1A | 2 | uint16 | Reserved (always 0) |
| 0x04 | 2 | uint16 | Number of Lua Files |
| 0x06 | 2 | uint16 | Number of GameObjects |
| 0x08 | 2 | uint16 | Number of Navmeshes |
| 0x0A | 2 | uint16 | Number of Texture Atlases |
| 0x0C | 2 | uint16 | Number of CLUTs |
| 0x0E | 2 | uint16 | Player Start X (Fixed-point) |
| 0x10 | 2 | uint16 | Player Start Y (Fixed-point) |
| 0x12 | 2 | uint16 | Player Start Z (Fixed-point) |
| 0x14 | 2 | uint16 | Player Rotation X (Fixed-point) |
| 0x16 | 2 | uint16 | Player Rotation Y (Fixed-point) |
| 0x18 | 2 | uint16 | Player Rotation Z (Fixed-point) |
| 0x1A | 2 | uint16 | Player Height (Fixed-point) |
| 0x1C | 4 | uint32 | Reserved (always 0) |
---
## 2. Metadata Section
### 2.1 GameObject Descriptors (56 bytes each)
### 2.1 Lua File Descriptors (8 bytes each)
| Offset (per entry) | Size | Type | Description |
| ------------------ | ---- | ------ | --------------------------------- |
| 0x00 | 4 | uint32 | Lua File Data Offset |
| 0x04 | 4 | uint32 | Lua File Size |
### 2.2 GameObject Descriptors (56 bytes each)
| Offset (per entry) | Size | Type | Description |
| ------------------ | ---- | -------- | --------------------------------- |
@@ -37,21 +45,17 @@ All numeric values are stored in little‐endian format. All offsets are counted
| 0x0C | 4 | int32 | Z position (Fixed-point) |
| 0x10 | 36 | int32[9] | 3×3 Rotation Matrix (Fixed-point) |
| 0x34 | 2 | uint16 | Triangle count |
| 0x36 | 2 | int16 | Padding |
| 0x36 | 2 | int16 | Lua File Index (-1 if none) |
> Mesh data for each GameObject is located at `meshDataOffset`.
### 2.2 Navmesh Descriptors (8 bytes each)
### 2.3 Navmesh Descriptors (8 bytes each)
| Offset (per entry) | Size | Type | Description |
| ------------------ | ---- | ------ | --------------------------------- |
| 0x00 | 4 | uint32 | Navmesh Data Offset |
| 0x04 | 2 | int16 | Triangle count |
| 0x06 | 2 | int16 | Padding |
| 0x04 | 2 | uint16 | Triangle count |
| 0x06 | 2 | uint16 | Padding |
> Each triangle in a navmesh is defined by 3 `int16` vertices (6 bytes per vertex).
### 2.3 Texture Atlas Descriptors (12 bytes each)
### 2.4 Texture Atlas Descriptors (12 bytes each)
| Offset (per entry) | Size | Type | Description |
| ------------------ | ---- | ------ | -------------------------------- |
@@ -61,9 +65,7 @@ All numeric values are stored in little‐endian format. All offsets are counted
| 0x08 | 2 | uint16 | Atlas Position X (VRAM origin) |
| 0x0A | 2 | uint16 | Atlas Position Y (VRAM origin) |
> Pixel data is stored as `uint16[width * height]`.
### 2.4 CLUT Descriptors (12 bytes each)
### 2.5 CLUT Descriptors (12 bytes each)
| Offset (per entry) | Size | Type | Description |
| ------------------ | ---- | ------ | ----------------------------------------------------- |
@@ -73,13 +75,17 @@ All numeric values are stored in little‐endian format. All offsets are counted
| 0x08 | 2 | uint16 | Palette entry count |
| 0x0A | 2 | uint16 | Padding |
> CLUT pixel data is stored as `uint16[length]`.
---
## 3. Data Section
### 3.1 Mesh Data Block (per GameObject)
### 3.1 Lua Data Block
Each Lua file is stored as raw bytes. The size of each Lua file is specified in the Lua File Descriptor.
---
### 3.2 Mesh Data Block (per GameObject)
Each mesh is made of triangles:
@@ -105,20 +111,27 @@ Each mesh is made of triangles:
---
### 3.2 Navmesh Data Block
### 3.3 Navmesh Data Block
Each triangle is 3 vertices (`int16` x/y/z), total 18 bytes per triangle.
---
### 3.3 Texture Atlas Data Block
### 3.4 Texture Atlas Data Block
Pixel data stored as `uint16[width * height]`.
---
### 3.4 CLUT Data Block
### 3.5 CLUT Data Block
Pixel data stored as `uint16[length]`.
---
## Notes
- All offsets are aligned to 4-byte boundaries.
- Fixed-point values are scaled by the `GTEScaling` factor.
- Lua file indices in GameObject descriptors are `-1` if no Lua file is associated with the object.
- Navmesh triangles are stored as raw vertex data without additional attributes.

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tools/imhex.hexproj
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