Add async SDF generation for all meshes in the scene

Source/Editor/Editor.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Runtime.InteropServices.Marshalling;
+using System.Threading.Tasks;
 using FlaxEditor.Content;
 using FlaxEditor.Content.Settings;
 using FlaxEditor.Content.Thumbnails;
@@ -1338,20 +1339,33 @@ namespace FlaxEditor
         /// </summary>
         public void BuildAllMeshesSDF()
         {
-            // TODO: async maybe with progress reporting?
+            var models = new List<Model>();
             Scene.ExecuteOnGraph(node =>
             {
                 if (node is StaticModelNode staticModelNode && staticModelNode.Actor is StaticModel staticModel)
                 {
-                    if (staticModel.DrawModes.HasFlag(DrawPass.GlobalSDF) && staticModel.Model != null && !staticModel.Model.IsVirtual && staticModel.Model.SDF.Texture == null)
+                    var model = staticModel.Model;
+                    if (staticModel.DrawModes.HasFlag(DrawPass.GlobalSDF) &&
+                        model != null &&
+                        !models.Contains(model) &&
+                        !model.IsVirtual &&
+                        model.SDF.Texture == null)
                     {
-                        Log("Generating SDF for " + staticModel.Model);
+                        models.Add(model);
-                        if (!staticModel.Model.GenerateSDF())
-                            staticModel.Model.Save();
                     }
                 }
                 return true;
             });
+            Task.Run(() =>
+            {
+                for (int i = 0; i < models.Count; i++)
+                {
+                    var model = models[i];
+                    Log($"[{i}/{models.Count}] Generating SDF for {model}");
+                    if (!model.GenerateSDF())
+                        model.Save();
+                }
+            });
         }
 
         #endregion