S1MAPI - Schedule 1 Mapping API

S1MAPI is a mapping and construction library for Schedule 1 mods. Create procedural meshes, build structures, and load GLTF assets without asset bundles.

What S1MAPI Does

• Procedural Meshes: Generate 3D shapes at runtime (boxes, spheres, cylinders, capsules)
• Building Construction: Create buildings with walls, floors, roofs, windows, and furniture
• GLTF Loading: Import external 3D models without external dependencies
• Update Resilience: Works across game updates by avoiding Assembly-CSharp types

Installation

For Players

If a mod you want to use requires MAPI:

1. Download the MAPI zip from Thunderstore
2. Extract the zip - it contains both MAPI-Mono.dll and MAPI-Il2Cpp.dll
3. Copy the correct DLL for your Steam branch to your game's UserLibs folder:
   • Regular Steam branch (default): Use MAPI-Il2Cpp.dll
   • Alternate Steam branch: Use MAPI-Mono.dll
4. Launch the game - MAPI will load automatically with MelonLoader

To check your Steam branch: Right-click Schedule One in Steam → Properties → Betas. If it shows "None" or no selection, you're on the regular branch (use Il2Cpp).

For Developers

Clone the repository and build:

git clone https://github.com/ifBars/S1MAPI.git
cd S1MAPI
dotnet build -c Mono   # For Mono builds
dotnet build -c Il2cpp # For IL2CPP builds

Requirements

• Game: Schedule 1
• Mod Loader: MelonLoader 0.7.0+

Learn More

• Getting Started - Installation and your first project
• Examples - Code examples and patterns
• MAPITesting Repository - Full working mod example

Relationship to S1API

S1MAPI and S1API are complementary:

• S1MAPI: Mesh construction, building generation, GLTF loading (no game dependencies)
• S1API: Game component wrappers, entity management, quests (wraps game types)

Contributing

Contributions are welcome! See Contributing Guide for guidelines.

License

GNU GPL v3 License - see LICENSE file.