BakeNaveMesh

///<summary>
///
/// This class is used for dungeons or terrain(not tested)
/// once the scene is ready and the NavMesh as been baked, will activate all NPCs
/// via AIManager
///
///     ADD THIS COMPONENT TO A PARENT THAT INCLUDE ALL WALKABLE SURFACE
///
///</summary>

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
[RequireComponent(typeof(AiManager))]
public class NavMeshBaker : MonoBehaviour
{
    [SerializeField] bool OnStart = false;
    [SerializeField] bool debugBounds = false;
    [Space]
    [SerializeField] List<NavMeshSurface> navMeshSurfaces = new List<NavMeshSurface>();

    NavMeshBuildSettings set = NavMesh.CreateSettings();

    private void Start()
    {
        if (OnStart)
            BakeNavMesh();
    }
    /// <summary>
    /// It will store all tiles with a NavMeshSurface and generate the NavMesh, then will awake all NPCs
    /// </summary>
    public void BakeNavMesh()
    {
        // Add all floors the array
        navMeshSurfaces = new List<NavMeshSurface>(GetComponentsInChildren<NavMeshSurface>());

        NavMeshData built = NavMeshBuilder.BuildNavMeshData(set,Nav2Nav(navMeshSurfaces), CalculateLocalBounds(), transform.position, transform.rotation);
        NavMesh.AddNavMeshData(built);

        GetComponent<AiManager>().EnableEnemies();
    }

    private List<NavMeshBuildSource> Nav2Nav(List<NavMeshSurface> array)
    {
        List<NavMeshBuildSource> nmBuildSource = new List<NavMeshBuildSource>();

        foreach (var tile in array)
        {
            NavMeshBuildSource floor = new NavMeshBuildSource();
            floor.transform = tile.transform.localToWorldMatrix;
            floor.shape = NavMeshBuildSourceShape.Box;
            floor.size = tile.GetComponent<Renderer>().bounds.size;
            nmBuildSource.Add(floor);
        }

        return nmBuildSource;
    }

    private Bounds CalculateLocalBounds()
    {
        navMeshSurfaces.Clear();
        navMeshSurfaces = new List<NavMeshSurface>(GetComponentsInChildren<NavMeshSurface>());

        Bounds bounds = new Bounds(this.transform.position, Vector3.zero);

        foreach (var floor in navMeshSurfaces)
        {
            bounds.Encapsulate(floor.GetComponent<Renderer>().bounds);
        }

        Vector3 localCenter = bounds.center - this.transform.localPosition;
        bounds.center = localCenter;
        Debug.Log("The local bounds of this model is " + bounds);

        return bounds;
    }

    void OnDrawGizmosSelected()
    {

        BakeNavMesh();

        if (debugBounds)
        {
            Bounds bounds = CalculateLocalBounds();
            Debug.Log("Selected obj " + bounds);

            Gizmos.color = new Color(1, 1, 1, 0.25f);
            Gizmos.DrawCube(bounds.center, bounds.size);
            Gizmos.DrawWireCube(bounds.center, bounds.size);
        }
    }
}