3 files changed, 53 insertions, 11 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 77658ef..719a5dd 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -5037,20 +5037,22 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void SetInertiaData(float TotalMass, Vector3 CenterOfMass, Vector3 Inertia, Vector4 aux )
         {
-            PhysicsActor pa = RootPart.PhysActor;
+            PhysicsInertiaData inertia = new PhysicsInertiaData();
+            inertia.TotalMass = TotalMass;
+            inertia.CenterOfMass = CenterOfMass;
+            inertia.Inertia = Inertia;
+            inertia.InertiaRotation = aux;
+
+            if(TotalMass < 0)
+                RootPart.PhysicsInertia = null;
+            else
+                RootPart.PhysicsInertia = new PhysicsInertiaData(inertia);
 
+            PhysicsActor pa = RootPart.PhysActor;
             if(pa !=null)
-            {
-                PhysicsInertiaData inertia = new PhysicsInertiaData();
-                inertia.TotalMass = TotalMass;
-                inertia.CenterOfMass = CenterOfMass;
-                inertia.Inertia = Inertia;
-                inertia.InertiaRotation = aux;
                 pa.SetInertiaData(inertia);
-            }
         }
 
-
         /// <summary>
         /// Set the user group to which this scene object belongs.
         /// </summary>
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index bf0e31b..46b7b86 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -406,6 +406,8 @@ namespace OpenSim.Region.Framework.Scenes
 
         private SOPVehicle m_vehicleParams = null;
 
+        private PhysicsInertiaData m_physicsInertia;
+
         public KeyframeMotion KeyframeMotion
         {
             get; set;
@@ -3548,6 +3550,18 @@ SendFullUpdateToClient(remoteClient, Position) ignores position parameter
             Force = force;
         }
 
+        public PhysicsInertiaData PhysicsInertia
+        {
+            get
+            {
+                return m_physicsInertia;
+            }
+            set
+            {
+                m_physicsInertia = value;
+            }
+        }
+
         public SOPVehicle VehicleParams
         {
             get
@@ -4748,8 +4762,13 @@ SendFullUpdateToClient(remoteClient, Position) ignores position parameter
 
                 if (VolumeDetectActive) // change if not the default only
                     pa.SetVolumeDetect(1);
+ 
+                bool isroot = (m_localId == ParentGroup.RootPart.LocalId);
+
+                if(isroot && m_physicsInertia != null)
+                    pa.SetInertiaData(m_physicsInertia);
 
-                if (m_vehicleParams != null && m_localId == ParentGroup.RootPart.LocalId)
+                if (isroot && m_vehicleParams != null )
                 {
                     m_vehicleParams.SetVehicle(pa);
                     if(isPhysical && !isPhantom && m_vehicleParams.CameraDecoupled)
diff --git a/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs b/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
index a12a401..87d1ace 100644
--- a/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
+++ b/OpenSim/Region/Framework/Scenes/Serialization/SceneObjectSerializer.cs
@@ -453,9 +453,10 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
             m_SOPXmlProcessors.Add("Torque", ProcessTorque);
             m_SOPXmlProcessors.Add("VolumeDetectActive", ProcessVolumeDetectActive);
 
-
             m_SOPXmlProcessors.Add("Vehicle", ProcessVehicle);
 
+            m_SOPXmlProcessors.Add("PhysicsInertia", ProcessPhysicsInertia);
+
             m_SOPXmlProcessors.Add("RotationAxisLocks", ProcessRotationAxisLocks);
             m_SOPXmlProcessors.Add("PhysicsShapeType", ProcessPhysicsShapeType);
             m_SOPXmlProcessors.Add("Density", ProcessDensity);
@@ -781,6 +782,23 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
             }
         }
 
+        private static void ProcessPhysicsInertia(SceneObjectPart obj, XmlReader reader)
+        {
+            PhysicsInertiaData pdata = PhysicsInertiaData.FromXml2(reader);
+
+            if (pdata == null)
+            {
+                obj.PhysicsInertia = null;
+                m_log.DebugFormat(
+                    "[SceneObjectSerializer]: Parsing PhysicsInertiaData for object part {0} {1} encountered errors.  Please see earlier log entries.",
+                    obj.Name, obj.UUID);
+            }
+            else
+            {
+                obj.PhysicsInertia = pdata;
+            }
+        }
+
         private static void ProcessShape(SceneObjectPart obj, XmlReader reader)
         {
             List<string> errorNodeNames;
@@ -1498,6 +1516,9 @@ namespace OpenSim.Region.Framework.Scenes.Serialization
             if (sop.VehicleParams != null)
                 sop.VehicleParams.ToXml2(writer);
 
+            if (sop.PhysicsInertia != null)
+                sop.PhysicsInertia.ToXml2(writer);
+
             if(sop.RotationAxisLocks != 0)
                 writer.WriteElementString("RotationAxisLocks", sop.RotationAxisLocks.ToString().ToLower());
             writer.WriteElementString("PhysicsShapeType", sop.PhysicsShapeType.ToString().ToLower());