1 files changed, 18 insertions, 16 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Prioritizer.cs b/OpenSim/Region/Framework/Scenes/Prioritizer.cs
index f9599f5..cde8d3f 100644
--- a/OpenSim/Region/Framework/Scenes/Prioritizer.cs
+++ b/OpenSim/Region/Framework/Scenes/Prioritizer.cs
@@ -167,6 +167,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         private double GetPriorityByFrontBack(IClientAPI client, ISceneEntity entity)
         {
+            if (entity == null) return double.NaN;
             ScenePresence presence = m_scene.GetScenePresence(client.AgentId);
             if (presence != null)
             {
@@ -224,22 +225,16 @@ namespace OpenSim.Region.Framework.Scenes
             if (entity == null)
                 return double.NaN;
 
-            // Use group position for child prims
-            Vector3 entityPos = entity.AbsolutePosition;
-            if (entity is SceneObjectPart)
+            ScenePresence presence = m_scene.GetScenePresence(client.AgentId);
+            if (presence != null)
             {
-                SceneObjectGroup group = (entity as SceneObjectPart).ParentGroup;
-                if (group != null)
-                    entityPos = group.AbsolutePosition;
+                // Use group position for child prims
+                Vector3 entityPos;
+                if (entity is SceneObjectPart)
+                    entityPos = ((SceneObjectPart)entity).ParentGroup.AbsolutePosition;
                 else
                     entityPos = entity.AbsolutePosition;
-            }
-            else
-                entityPos = entity.AbsolutePosition;
 
-            ScenePresence presence = m_scene.GetScenePresence(client.AgentId);
-            if (presence != null)
-            {
                 if (!presence.IsChildAgent)
                 {
                     if (entity is ScenePresence)
@@ -259,12 +254,19 @@ namespace OpenSim.Region.Framework.Scenes
 
                     if (entity is SceneObjectPart)
                     {
-                        PhysicsActor physActor = ((SceneObjectPart)entity).ParentGroup.RootPart.PhysActor;
-                        if (physActor == null || !physActor.IsPhysical)
-                            priority += 100;
-
                         if (((SceneObjectPart)entity).ParentGroup.RootPart.IsAttachment)
+                        {
                             priority = 1.0;
+                        }
+                        else
+                        {
+                            PhysicsActor physActor = ((SceneObjectPart)entity).ParentGroup.RootPart.PhysActor;
+                            if (physActor == null || !physActor.IsPhysical)
+                                priority += 100;
+                        }
+
+                        if (((SceneObjectPart)entity).ParentGroup.RootPart != (SceneObjectPart)entity)
+                            priority +=1;
                     }
                     return priority;
                 }