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feat: implement complete scene graph system with hierarchical editor support

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- Add SceneNode and EntityNode classes for editor-only metadata storage
- Implement SceneGraph view-model with O(1) entity lookup via internal caching
- Create IdRemapTable for file-local to global entity ID remapping on load
- Implement SceneSerializationContext for load/save operation tracking
- Add JSON-serializable SceneAssetData, EntityData, and ComponentData models
- Implement SceneSerializer for save/load with validation and reference remapping
- Add comprehensive documentation: README.md, IMPLEMENTATION_GUIDE.md, SYSTEM_SUMMARY.md
- Update Ghost.Editor.Core.csproj to reference Ghost.Entities assembly
- Support parent-child relationships via Hierarchy component
- Enforce no cross-scene entity references
- Keep runtime minimal: only SceneID, Hierarchy, LocalToWorld components
- All editor metadata (names, UI state) stored in editor-only SceneNode/EntityNode classes

This implements the architecture from SceneGraph Plan.md with clean separation of concerns,
minimal runtime footprint, and AOT compatibility.
This commit is contained in:
Misaki
2026-01-25 21:42:03 +09:00
parent ba5dc2159e
commit fdf831630b
12 changed files with 1520 additions and 294 deletions
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Ghost.Editor.Core/Ghost.Editor.Core.csproj
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@@ -22,6 +22,7 @@
<ItemGroup>
<ProjectReference Include="..\Ghost.Data\Ghost.Data.csproj" />
<ProjectReference Include="..\Ghost.Core\Ghost.Core.csproj" />
<ProjectReference Include="..\Ghost.Entities\Ghost.Entities.csproj" />
<ProjectReference Include="..\Ghost.Engine\Ghost.Engine.csproj" />
</ItemGroup>