optimize GetSelectedMeshInfo (loop meshes only if selection changed), add TOP10 verts list

Author: unitycoder

Assets/Scripts/Editor/Tools/GetSelectedMeshInfo.cs

@@ -1,12 +1,22 @@
 // display selected gameobject mesh stats (should work on prefabs,models in project window also)
 
+using System.Collections.Generic;
 using UnityEditor;
 using UnityEngine;
 
 namespace UnityLibrary
 {
     public class GetSelectedMeshInfo : EditorWindow
     {
+        bool selectionChanged = false;
+
+        int totalMeshes = 0;
+        int totalVertices = 0;
+        int totalTris = 0;
+
+        List<int> top10 = new List<int>();
+        MeshFilter[] meshes;
+
         [MenuItem("Tools/UnityLibrary/GetMeshInfo")]
         public static void ShowWindow()
         {
@@ -17,34 +27,62 @@ public static void ShowWindow()
         void OnGUI()
         {
             var selection = Selection.activeGameObject;
-
             if (selection != null)
             {
                 EditorGUILayout.LabelField("Selected: " + selection.name);
 
-                int totalMeshes = 0;
-                int totalVertices = 0;
-                int totalTris = 0;
-
-                // get all meshes
-                var meshes = selection.GetComponentsInChildren<MeshFilter>();
-                for (int i = 0, length = meshes.Length; i < length; i++)
+                // update mesh info only if selection changed
+                if (selectionChanged == true)
                 {
-                    totalVertices += meshes[i].sharedMesh.vertexCount;
-                    totalTris += meshes[i].sharedMesh.triangles.Length / 3;
-                    totalMeshes++;
+                    top10.Clear();
+
+                    totalMeshes = 0;
+                    totalVertices = 0;
+                    totalTris = 0;
+
+                    // get all meshes
+                    meshes = selection.GetComponentsInChildren<MeshFilter>();
+                    for (int i = 0, length = meshes.Length; i < length; i++)
+                    {
+                        int verts = meshes[i].sharedMesh.vertexCount;
+                        totalVertices += verts;
+                        totalTris += meshes[i].sharedMesh.triangles.Length / 3;
+                        totalMeshes++;
+                        top10.Add(verts);
+                    }
+                    selectionChanged = false;
+
+                    // sort top10
+                    top10.Sort();
                 }
 
                 // display stats
                 EditorGUILayout.LabelField("Meshes: " + totalMeshes);
                 EditorGUILayout.LabelField("Vertices: " + totalVertices);
                 EditorGUILayout.LabelField("Triangles: " + totalTris);
+                EditorGUILayout.Space();
+                EditorGUILayout.LabelField("TOP 10", EditorStyles.boldLabel);
+
+                // top 10
+                if (meshes != null)
+                {
+                    // start from last index
+                    int from = meshes.Length;
+                    // until 10 meshes or if less than 10
+                    int to = meshes.Length - Mathf.Min(10, from);
+                    for (int i = from-1; i >= to; i--)
+                    {
+                        int percent = (int)(top10[i] / (float)totalVertices * 100f);
+                        EditorGUILayout.LabelField(meshes[i].name + " = " + top10[i] + " (" + percent + "%)");
+                    }
+                }
             }
 
         }
 
         void OnSelectionChange()
         {
+            selectionChanged = true;
             // force redraw window
             Repaint();
         }