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Assets/Plugins/MeshCombineStudio/Scripts/Mesh/VisualizeMesh.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class VisualizeMesh : MonoBehaviour
+{
+    public float sphereRadius = 0.05f;
+
+    MeshFilter mf;
+    Mesh m;
+
+    void OnDrawGizmosSelected()
+    {
+        if (!mf) mf = GetComponent<MeshFilter>();
+        if (!mf) return;
+
+        if (!m) m = mf.sharedMesh;
+        if (!m) return;
+
+        Vector3[] verts = m.vertices;
+        Vector3[] normals = m.normals;
+        Vector4[] tangents = m.tangents;
+
+        Matrix4x4 mt = transform.localToWorldMatrix;
+        Matrix4x4 mn = mt.inverse.transpose;
+
+        for (int i = 0; i < verts.Length; i++)
+        {
+            Gizmos.color = Color.green;
+            Vector3 pos = mt.MultiplyPoint3x4(verts[i]);
+            Gizmos.DrawSphere(pos, sphereRadius);
+
+            Gizmos.color = Color.blue;
+            Gizmos.DrawLine(pos, pos + mn.MultiplyVector(normals[i]) * 0.5f);
+
+            Gizmos.color = Color.red;
+            Gizmos.DrawLine(pos, pos + mt.MultiplyVector(new Vector3(tangents[i].x, tangents[i].y, tangents[i].z)) * 0.5f);
+        }
+    }
+}