Namespace: unity doesnt recognize"NavigationSurface"

Questions & Answers
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1

“Help me. I’m don’t know how to write a single sentence or how to ask a question.”

Namespace: unity doesnt recognize"NavigationSurface"

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.AI.Navigation; //doest recognize
using UnityEngine.AI; //doest recognize

public class NaviMeshManager : MonoBehaviour
{
    public NavigationSurface[] surfaces;
    public void UpdateNavigationMesh()
    {
        surfaces = FindObjectsOfType<NavigationSurface>();

        // Update the NavigationSurface
        for (int i = 0; i < surfaces.Length; i++)
        {
            surfaces[i].BuildNavMesh();
        }

        Debug.Log("updating ALL nav mesh");
    }
}
2

Did you install the AI navigation package?, from the package manager > unity registry and install AI navigation, then try.

3

I have the same issue and after further investigation I found that starting a new project doesn’t have this issue. So I’m wondering if there’s a package in my project causing this. I did find a bug report that indicated that the old NavMesh package had to be uninstalled but I don’t have it.

4

The namespace to use for NavMeshSurface is different, It doesn’t exist in the UnityEngine.AI namespace, it exists in Unity.AI.Navigation, So an example :

using UnityEngine;
using UnityEngine.AI; // Need this for the Normal NavMesh Components
using Unity.AI.Navigation; // Need this for NavMeshSurface

public class Nav : MonoBehaviour
{

    // Nav Mesh (Agent & Obstacle) exists in UnityEngine.AI
    // NavMeshAgent
    [SerializeField] private NavMeshAgent agent;

    // NavMeshObstacle
    [SerializeField] private NavMeshObstacle obstacle;

    // Nav Mesh Surface exists in Unity.AI.Navigation
    // NavMeshSurface
    // One.
    [SerializeField] private NavMeshSurface surface;
    // Multiple.
    [SerializeField] private NavMeshSurface[] surfaces;

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}