Tools for working with Unity.AI.Navigation and generating navmesh: link generation, mesh cleanup, etc

See the unity-5 branch for Unity's NavMeshComponents (Unity 5 and earlier).

Default NavMesh Generation	Using NavLinkGenerator's Bake Links and Interior Volumes

NavLinkGenerator

NavLinkGenerator is an asset for generating NavMeshLinks across gaps in your navmesh. It also serves as the central hub for navgen.

NavLinkGenerator is a ScriptableObject -- so you need to create one to start using it (Assets > Create > Navigation > NavLinkGenerator). The asset contains settings and buttons for generating links.

NavNonWalkableCollection

The "Create Interior Volumes" button in NavLinkGenerator creates a NavNonWalkableCollection which tracks the volumes so they can be rebuilt. Remove a volume from this component's list to prevent it from being modified.

NavMeshAreas

You can assign enum values from UnityEngine.AI.NavMeshAreas to NavMeshAgent's AreaMask and UnityEngine.AI.NavMeshAreaIndex to area indexes in NavMeshSurface, NavMeshLink, NavMeshModifierVolume, etc. These enums are automatically updated from the areas defined in Navigation (Window > AI > Navigation).

NavMeshAreas generates two enums that look something like this:

// NavMeshAgent uses AreaMask.
[Flags]
public enum NavMeshAreas
{
    None = 0,
    Walkable = 1, NotWalkable = 2, Jump = 4, Climb = 8, Blocked = 16, Hole = 32, Edge = 64, Fall = 128, New1 = 256, Stuff = 512, 
    All = ~0,
}

// NavMeshSurface, NavMeshLink, NavMeshModifierVolume, etc. use indexes.
public enum NavMeshAreaIndex
{
    Walkable = 0, NotWalkable = 1, Jump = 2, Climb = 3, Blocked = 4, Hole = 5, Edge = 6, Fall = 7, New1 = 8, Stuff = 9, 
}

Example

See the example branch for a demonstration project.

Installation

1. Add Unity.AI.Navigation to your project with the Unity package manager.

2. Copy the code to your project or add a dependency to your manifest.json to install as a package:

   "com.github.idbrii.unity-navgen": "https://github.com/idbrii/unity-navgen.git#latest-release",

Alternatives

• NavMeshLinks_AutoPlacer by eDmitriy
• Navmesh Cleaner (see here to use with NavMeshComponents)

Credits

This project includes UnityNavMeshAreas Copyright (c) 2018 jeffvella.