├── README.md
└── SetTerrainObstacles.cs


/README.md:
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 1 | # Unity-NavMesh-load navMeshObstacles for your terrain trees
 2 | This is small addon for the unity NavMeshComponents that allows you to load your Terrain trees as actual obstacles into the navMeshSurface.
 3 | 
 4 | 
 5 | 
 6 | For the Script to work you have to add Either a CapsuleCollider or a BoxCollider to your tree and ajust it on how big you wana have the NavMeshObstacle Componnent.
 7 | If you don't do this, The NavMeshObstacle does not know where to get its value from and the script stops working.
 8 | 
 9 | ![Tut1](https://user-images.githubusercontent.com/76574483/103113332-89554580-465a-11eb-9d40-5aab74c8db56.png)
10 | 
11 | Check if all the trees you want to have a NavMeshObstacle for are in your Terrain Tree index.
12 | ![Tut2](https://user-images.githubusercontent.com/76574483/103113466-29ab6a00-465b-11eb-8a01-cb0c2ff31be5.png)
13 | 
14 | Before hitting the play button, Check if navMEshSurface has Baked the Terrain.
15 | then add the Scrip and hit play. (it loads relativly fast on 30k trees). After Loading you should see a gameObject named "Tree_Obstacles".
16 | in there are all the NavMeshObstacle. Done.
17 | 
18 | ![tut3](https://user-images.githubusercontent.com/76574483/103113717-44321300-465c-11eb-9b16-279192ba2392.png)
19 | 
20 | Link to Script : https://github.com/Malikir324/Unity-NavMesh-adding-Obstacles-To-Terrain-Trees/blob/main/SetTerrainObstacles.cs
21 | 


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/SetTerrainObstacles.cs:
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 1 | using System.Collections;
 2 | using System.Collections.Generic;
 3 | using UnityEngine;
 4 | using UnityEngine.AI;
 5 | 
 6 | public class SetTerrainObstacles : MonoBehaviour
 7 | {
 8 |     // Start is called before the first frame update
 9 |     TreeInstance[] Obstacle;
10 |     Terrain terrain;
11 |     float width;
12 |     float lenght; 
13 |     float hight;
14 |     bool isError;
15 |     void Start()
16 |     {
17 |         terrain = Terrain.activeTerrain;
18 |         Obstacle = terrain.terrainData.treeInstances;
19 | 
20 |         lenght = terrain.terrainData.size.z;
21 |         width = terrain.terrainData.size.x;
22 |         hight = terrain.terrainData.size.y;
23 |         Debug.Log("Terrain Size is :" + width + " , " + hight + " , " + lenght);
24 | 
25 |         int i = 0;
26 |         GameObject parent = new GameObject("Tree_Obstacles");
27 | 
28 |         Debug.Log("Adding "+Obstacle.Length+" navMeshObstacle Components for Trees");
29 |         foreach (TreeInstance tree in Obstacle)
30 |         {
31 |             Vector3 tempPos = new Vector3(tree.position.x * width, tree.position.y * hight, tree.position.z * lenght);
32 |             Quaternion tempRot = Quaternion.AngleAxis(tree.rotation * Mathf.Rad2Deg, Vector3.up);
33 | 
34 |             GameObject obs = new GameObject("Obstacle" + i);
35 |             obs.transform.SetParent(parent.transform);
36 |             obs.transform.position = tempPos;
37 |             obs.transform.rotation = tempRot;
38 | 
39 |             obs.AddComponent<NavMeshObstacle>();
40 |             NavMeshObstacle obsElement = obs.GetComponent<NavMeshObstacle>();
41 |             obsElement.carving = true;
42 |             obsElement.carveOnlyStationary = true;
43 | 
44 |             if (terrain.terrainData.treePrototypes[tree.prototypeIndex].prefab.GetComponent<Collider>() == null)
45 |             {
46 |                 isError = true;
47 |                 Debug.LogError("ERROR  There is no CapsuleCollider or BoxCollider attached to ''" + terrain.terrainData.treePrototypes[tree.prototypeIndex].prefab.name + "'' please add one of them.");
48 |                 break;
49 |             }
50 |             Collider coll = terrain.terrainData.treePrototypes[tree.prototypeIndex].prefab.GetComponent<Collider>();
51 |             if(coll.GetType() == typeof(CapsuleCollider) || coll.GetType() == typeof(BoxCollider))
52 |             {
53 | 
54 |                 if (coll.GetType() == typeof(CapsuleCollider))
55 |                 {
56 |                     CapsuleCollider capsuleColl = terrain.terrainData.treePrototypes[tree.prototypeIndex].prefab.GetComponent<CapsuleCollider>();
57 |                     obsElement.shape = NavMeshObstacleShape.Capsule;
58 |                     obsElement.center = capsuleColl.center;
59 |                     obsElement.radius = capsuleColl.radius;
60 |                     obsElement.height = capsuleColl.height;
61 |                                       
62 |                 }
63 |                 else if (coll.GetType() == typeof(BoxCollider))
64 |                 {
65 |                     BoxCollider boxColl = terrain.terrainData.treePrototypes[tree.prototypeIndex].prefab.GetComponent<BoxCollider>();
66 |                     obsElement.shape = NavMeshObstacleShape.Box;
67 |                     obsElement.center = boxColl.center;
68 |                     obsElement.size = boxColl.size;
69 |                 }
70 |                
71 |             }
72 |             else 
73 |             {
74 |                 isError = true;
75 |                 Debug.LogError("ERROR  There is no CapsuleCollider or BoxCollider attached to ''" + terrain.terrainData.treePrototypes[tree.prototypeIndex].prefab.name + "'' please add one of them.");
76 |                 break;
77 |             }
78 | 
79 | 
80 |             i++;
81 |         }
82 |         parent.transform.position = terrain.GetPosition();
83 |         if(!isError) Debug.Log("All " + Obstacle.Length + " NavMeshObstacles were succesfully added to your Scene, Horray !");
84 |     }
85 | }
86 | 


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