Show mesh vertices and normals in sceneview [Unity3D]

MeshInspector.cs

// author: Stijn Raaijmakers (@bugshake)
// date: 11 sep 2016

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

/// <summary>Add this component to any GameObject with a MeshFilter, then select it in the editor</summary>
public class MeshInspector : MonoBehaviour
{
#if UNITY_EDITOR
    void OnDrawGizmosSelected()
    {
        Mesh mesh = GetComponent<MeshFilter>().sharedMesh;
        if (mesh != null)
        {
            var verts = mesh.vertices;
            var norms = mesh.normals;

            for (int i = 0; i < verts.Length && i < norms.Length; ++i)
            {
                Vector3 p1 = transform.TransformPoint(verts[i]);
                Vector3 p2 = transform.TransformPoint(verts[i] + norms[i]);
                Gizmos.color = Color.blue;
                Gizmos.DrawSphere(p1, .1f);
                Gizmos.color = Color.yellow;
                Gizmos.DrawLine(p1, p2);

                Handles.Label(p1, i.ToString());
            }
        }
    }
#endif
}