Make the mesh name unique #470

Assets/VRM/UniGLTF/Scripts/IO/ImporterContext.cs

@@ -20,7 +20,7 @@ namespace UniGLTF
     /// <summary>
     /// GLTF importer
     /// </summary>
-    public class ImporterContext: IDisposable
+    public class ImporterContext : IDisposable
     {
         #region MeasureTime
         bool m_showSpeedLog
@@ -261,7 +261,7 @@ namespace UniGLTF
                 ParseJson(Encoding.UTF8.GetString(jsonBytes.Array, jsonBytes.Offset, jsonBytes.Count),
                     new SimpleStorage(chunks[1].Bytes));
             }
-            catch(StackOverflowException ex)
+            catch (StackOverflowException ex)
             {
                 throw new Exception("[UniVRM Import Error] json parsing failed, nesting is too deep.\n" + ex);
             }
@@ -301,6 +301,8 @@ namespace UniGLTF
             // Version Compatibility
             RestoreOlderVersionValues();
 
+            FixUnique();
+
             // parepare byte buffer
             //GLTF.baseDir = System.IO.Path.GetDirectoryName(Path);
             foreach (var buffer in GLTF.buffers)
@@ -309,6 +311,39 @@ namespace UniGLTF
             }
         }
 
+        static string MakeUniqueName(string name, HashSet<string> used)
+        {
+            for (var i = 0; i < 100; ++i)
+            {
+                name = $"{name}_{i}";
+                if (!used.Contains(name))
+                {
+                    return name;
+                }
+            }
+
+            throw new Exception("hobo arienai");
+        }
+
+        void FixUnique()
+        {
+            var used = new HashSet<string>();
+            foreach (var mesh in GLTF.meshes)
+            {
+                var lname = mesh.name.ToLower();
+                if (used.Contains(lname))
+                {
+                    // rename
+                    var uname = MakeUniqueName(lname, used);
+                    Debug.LogWarning($"same name: {lname} => {uname}");
+                    mesh.name = uname;
+                    lname = uname;
+                }
+
+                used.Add(lname);
+            }
+        }
+
         void RestoreOlderVersionValues()
         {
             var parsed = UniJSON.JsonParser.Parse(Json);
@@ -374,7 +409,7 @@ namespace UniGLTF
         #region Load. Build unity objects
 
         public bool EnableLoadBalancing;
-        
+
         /// <summary>
         /// ReadAllBytes, Parse, Create GameObject
         /// </summary>
@@ -636,7 +671,7 @@ namespace UniGLTF
             }
             yield return null;
         }
-        
+
         IEnumerator BuildMesh(MeshImporter.MeshContext x, int i)
         {
             using (MeasureTime("BuildMesh"))
@@ -644,7 +679,7 @@ namespace UniGLTF
                 MeshWithMaterials meshWithMaterials;
                 if (EnableLoadBalancing)
                 {
-                    var buildMesh =  MeshImporter.BuildMeshCoroutine(this, x);
+                    var buildMesh = MeshImporter.BuildMeshCoroutine(this, x);
                     yield return buildMesh;
                     meshWithMaterials = buildMesh.Current as MeshWithMaterials;
                 }
@@ -733,9 +768,9 @@ namespace UniGLTF
 
             yield return null;
         }
-#endregion
+        #endregion
 
-#region Imported
+        #region Imported
         public GameObject Root;
         public List<Transform> Nodes = new List<Transform>();
 
@@ -784,7 +819,7 @@ namespace UniGLTF
         {
             foreach (var x in Meshes)
             {
-                foreach(var y in x.Renderers)
+                foreach (var y in x.Renderers)
                 {
                     y.enabled = true;
                 }
@@ -862,11 +897,11 @@ namespace UniGLTF
                 var loaded = assetPath.LoadAsset<Material>();
 
                 // replace component reference
-                foreach(var mesh in Meshes)
+                foreach (var mesh in Meshes)
                 {
-                    foreach(var r in mesh.Renderers)
+                    foreach (var r in mesh.Renderers)
                     {
-                        for(int i=0; i<r.sharedMaterials.Length; ++i)
+                        for (int i = 0; i < r.sharedMaterials.Length; ++i)
                         {
                             if (r.sharedMaterials.Contains(o))
                             {