DotRecast

DotRecast is C# Recast & Detour, a port of recastnavigation and recast4j to the C# language.
If you'd like to support the project, we'd appreciate starring(⭐) our repos on Github for more visibility.

🚀 Features

🤖 Automatic - Recast can generate a navmesh from any level geometry you throw at it
🏎️ Fast - swift turnaround times for level designers
🧘 Flexible - detailed customization options and modular design let you tailor functionality to your specific needs
🚫 Dependency-Free - building Recast & Detour only requires a .NET compiler
💪 Industry Standard - Recast powers AI navigation features in Unity, Unreal, Godot, O3DE and countless AAA and indie games and engines

Recast Navigation is divided into multiple modules, each contained in its own folder:

DotRecast.Core : Core utils
DotRecast.Recast : Navmesh generation
DotRecast.Detour : Runtime loading of navmesh data, pathfinding, navmesh queries
DotRecast.Detour.TileCache : Navmesh streaming. Useful for large levels and open-world games
DotRecast.Detour.Crowd : Agent movement, collision avoidance, and crowd simulation
DotRecast.Detour.Dynamic : robust support for dynamic nav meshes combining pre-built voxels with dynamic objects which can be freely added and removed
DotRecast.Detour.Extras : simple tool to import navmeshes created with A* Pathfinding Project
DotRecast.Recast.Toolset : all modules
DotRecast.Recast.Demo : Standalone, comprehensive demo app showcasing all aspects of Recast & Detour's functionality
Tests : Unit tests

⚡ Getting Started

To build or integrate into your own project, please check out BuildingAndIntegrating.md
To create a NavMesh, please check out RecastSoloMeshTest.cs
To test pathfinding, please check out FindPathTest.cs
To watch the demo play video, please check out Demo Video

⚙ How it Works

Recast constructs a navmesh through a multi-step mesh rasterization process.

First Recast rasterizes the input triangle meshes into voxels.
Voxels in areas where agents would not be able to move are filtered and removed.
The walkable areas described by the voxel grid are then divided into sets of polygonal regions.
The navigation polygons are generated by re-triangulating the generated polygonal regions into a navmesh.

You can use Recast to build a single navmesh, or a tiled navmesh.
Single meshes are suitable for many simple, static cases and are easy to work with.
Tiled navmeshes are more complex to work with but better support larger, more dynamic environments. Tiled meshes enable advance Detour features like re-baking, heirarchical path-planning, and navmesh data-streaming.