Normal Gizmo

Does anyone have any script to show mesh normals using Gizmo.DrawLine or Debug.DrawLine?

I'm sure I've found this before on the forum/Wiki but I've been searching on and off all day and can't find a thing.

 

This was posted almost 9 years ago, but still encase sombody googles it like I did, heres the solution

Code (CSharp):

1. var vert = _mesh.vertices[i];
2. var normal = _mesh.normals[i];
3. Gizmos.DrawSphere(vert, 0.1f);
4. Gizmos.DrawLine(vert, vert + normal);

 

Here is a complete script that you can add to a gameobject with a meshfilter / meshrenderer.

Code (CSharp):

1.  
2. using UnityEngine;
3.  
4. public class MeshNormalsGizmo : MonoBehaviour
5. {
6.     private Mesh _mesh = null;
7.  
8.     void Start()
9.     {
10.         MeshFilter filter = GetComponent<MeshFilter>();
11.        
12.         if (filter != null)
13.         {
14.             _mesh = filter.sharedMesh;
15.         }
16.     }
17.  
18.     private void OnDrawGizmos()
19.     {
20.         if (_mesh == null)
21.         {
22.             return;
23.         }
24.  
25.         for (int count = 0; count < _mesh.vertexCount; count++)
26.         {
27.             var vert = transform.TransformPoint(_mesh.vertices[count]);
28.             var normal = transform.TransformDirection(_mesh.normals[count]);
29.             Gizmos.color = Color.green;
30.             Gizmos.DrawSphere(vert, 0.05f);
31.             Gizmos.color = Color.blue;
32.             Gizmos.DrawLine(vert, vert + normal);
33.         }
34.     }
35. }
36.