6 files changed, 143 insertions, 170 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs b/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
index a4460e4..41141e0 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.Inventory.cs
@@ -2265,7 +2265,7 @@ namespace OpenSim.Region.Framework.Scenes
                         group.ClearPartAttachmentData();
                     }
                     
-                    group.UpdateGroupRotation(rot);
+                    group.UpdateGroupRotationR(rot);
                     
                     //group.ApplyPhysics(m_physicalPrim);
                     if (group.RootPart.PhysActor != null && group.RootPart.PhysActor.IsPhysical && vel != Vector3.Zero)
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 0aa587e..55ec281 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -2821,7 +2821,7 @@ namespace OpenSim.Region.Framework.Scenes
                             // SceneObjectGroup obj = m_sceneGraph.DuplicateObject(localID, pos, target.GetEffectiveObjectFlags(), AgentID, GroupID, worldRot);
                             m_sceneGraph.DuplicateObject(localID, pos, target.GetEffectiveObjectFlags(), AgentID, GroupID, worldRot);
                             //obj.Rotation = worldRot;
-                            //obj.UpdateGroupRotation(worldRot);
+                            //obj.UpdateGroupRotationR(worldRot);
                         }
                         else
                         {
@@ -4500,7 +4500,7 @@ namespace OpenSim.Region.Framework.Scenes
                         Quaternion q = trackedBody.RotationOffset * joint.LocalRotation;
 
                         jointProxyObject.ParentGroup.UpdateGroupPosition(proxyPos); // schedules the entire group for a terse update
-                        jointProxyObject.ParentGroup.UpdateGroupRotation(q); // schedules the entire group for a terse update
+                        jointProxyObject.ParentGroup.UpdateGroupRotationR(q); // schedules the entire group for a terse update
                     }
                     break;
             }
diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 54ac792..cda0bfc 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -1253,7 +1253,7 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 if (m_parentScene.Permissions.CanMoveObject(group.UUID, remoteClient.AgentId))
                 {
-                    group.UpdateGroupRotation(rot);
+                    group.UpdateGroupRotationR(rot);
                 }
             }
         }
@@ -1272,7 +1272,7 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 if (m_parentScene.Permissions.CanMoveObject(group.UUID, remoteClient.AgentId))
                 {
-                    group.UpdateGroupRotation(pos, rot);
+                    group.UpdateGroupRotationPR(pos, rot);
                 }
             }
         }
@@ -1828,7 +1828,7 @@ namespace OpenSim.Region.Framework.Scenes
 
                     if (rot != Quaternion.Identity)
                     {
-                        copy.UpdateGroupRotation(rot);
+                        copy.UpdateGroupRotationR(rot);
                     }
 
                     copy.CreateScriptInstances(0, false, m_parentScene.DefaultScriptEngine, 0);
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 6807e1b..6b4cc0d 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -386,6 +386,13 @@ namespace OpenSim.Region.Framework.Scenes
         #region Constructors
 
         /// <summary>
+        /// Constructor
+        /// </summary>
+        public SceneObjectGroup()
+        {
+        }
+
+        /// <summary>
         /// This constructor creates a SceneObjectGroup using a pre-existing SceneObjectPart.
         /// The original SceneObjectPart will be used rather than a copy, preserving
         /// its existing localID and UUID.
@@ -2974,8 +2981,9 @@ namespace OpenSim.Region.Framework.Scenes
         ///
         /// </summary>
         /// <param name="rot"></param>
-        public void UpdateGroupRotation(Quaternion rot)
+        public void UpdateGroupRotationR(Quaternion rot)
         {
+        
             m_rootPart.UpdateRotation(rot);
             if (m_rootPart.PhysActor != null)
             {
@@ -2992,7 +3000,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         /// <param name="pos"></param>
         /// <param name="rot"></param>
-        public void UpdateGroupRotation(Vector3 pos, Quaternion rot)
+        public void UpdateGroupRotationPR(Vector3 pos, Quaternion rot)
         {
             m_rootPart.UpdateRotation(rot);
             if (m_rootPart.PhysActor != null)
@@ -3100,22 +3108,26 @@ namespace OpenSim.Region.Framework.Scenes
             int yaxis = 4;
             int zaxis = 8;
 
-            setX = ((axis & xaxis) != 0) ? true : false;
-            setY = ((axis & yaxis) != 0) ? true : false;
-            setZ = ((axis & zaxis) != 0) ? true : false;
+            if (m_rootPart != null)
+            {
+                setX = ((axis & xaxis) != 0) ? true : false;
+                setY = ((axis & yaxis) != 0) ? true : false;
+                setZ = ((axis & zaxis) != 0) ? true : false;
 
-            float setval = (rotate10 > 0) ? 1f : 0f;
+                float setval = (rotate10 > 0) ? 1f : 0f;
 
-            if (setX)
-                m_rootPart.RotationAxis.X = setval;
-            if (setY)
-                m_rootPart.RotationAxis.Y = setval;
-            if (setZ)
-                m_rootPart.RotationAxis.Z = setval;
+                if (setX)
+                    m_rootPart.RotationAxis.X = setval;
+                if (setY)
+                    m_rootPart.RotationAxis.Y = setval;
+                if (setZ)
+                    m_rootPart.RotationAxis.Z = setval;
+
+                if (setX || setY || setZ)
+                {
+                    m_rootPart.SetPhysicsAxisRotation();
+                }
 
-            if (setX || setY || setZ)
-            {
-                m_rootPart.SetPhysicsAxisRotation();
             }
         }
 
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index ea6bc9c..b4cfc48 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -415,10 +415,9 @@ namespace OpenSim.Region.Framework.Scenes
             set 
             { 
                 m_name = value;
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    pa.SOPName = value;
+                    PhysActor.SOPName = value;
                 }
             }
         }
@@ -428,11 +427,10 @@ namespace OpenSim.Region.Framework.Scenes
             get { return (byte) m_material; }
             set
             {
-                PhysicsActor pa = PhysActor;
                 m_material = (Material)value;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    pa.SetMaterial((int)value);
+                    PhysActor.SetMaterial((int)value);
                 }
             }
         }
@@ -503,12 +501,11 @@ namespace OpenSim.Region.Framework.Scenes
             get
             {
                 // If this is a linkset, we don't want the physics engine mucking up our group position here.
-                PhysicsActor pa = PhysActor;
-                if (pa != null && _parentID == 0)
+                if (PhysActor != null && _parentID == 0)
                 {
-                    m_groupPosition.X = pa.Position.X;
-                    m_groupPosition.Y = pa.Position.Y;
-                    m_groupPosition.Z = pa.Position.Z;
+                    m_groupPosition.X = PhysActor.Position.X;
+                    m_groupPosition.Y = PhysActor.Position.Y;
+                    m_groupPosition.Z = PhysActor.Position.Z;
                 }
 
                 if (IsAttachment)
@@ -528,27 +525,26 @@ namespace OpenSim.Region.Framework.Scenes
 
                 m_groupPosition = value;
 
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
                     try
                     {
                         // Root prim actually goes at Position
                         if (_parentID == 0)
                         {
-                            pa.Position = new PhysicsVector(value.X, value.Y, value.Z);
+                            PhysActor.Position = new PhysicsVector(value.X, value.Y, value.Z);
                         }
                         else
                         {
                             // To move the child prim in respect to the group position and rotation we have to calculate
                             Vector3 resultingposition = GetWorldPosition();
-                            pa.Position = new PhysicsVector(resultingposition.X, resultingposition.Y, resultingposition.Z);
+                            PhysActor.Position = new PhysicsVector(resultingposition.X, resultingposition.Y, resultingposition.Z);
                             Quaternion resultingrot = GetWorldRotation();
-                            pa.Orientation = resultingrot;
+                            PhysActor.Orientation = resultingrot;
                         }
 
                         // Tell the physics engines that this prim changed.
-                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                     }
                     catch (Exception e)
                     {
@@ -581,16 +577,15 @@ namespace OpenSim.Region.Framework.Scenes
 
                 if (ParentGroup != null && !ParentGroup.IsDeleted)
                 {
-                    PhysicsActor pa = PhysActor;
-                     if (_parentID != 0 && pa != null)
+                     if (_parentID != 0 && PhysActor != null)
                     {
                         Vector3 resultingposition = GetWorldPosition();
-                        pa.Position = new PhysicsVector(resultingposition.X, resultingposition.Y, resultingposition.Z);
+                        PhysActor.Position = new PhysicsVector(resultingposition.X, resultingposition.Y, resultingposition.Z);
                         Quaternion resultingrot = GetWorldRotation();
-                        pa.Orientation = resultingrot;
+                        PhysActor.Orientation = resultingrot;
 
                         // Tell the physics engines that this prim changed.
-                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                     }
                 }
             }
@@ -600,14 +595,13 @@ namespace OpenSim.Region.Framework.Scenes
         {
             get
             {
-                PhysicsActor pa = PhysActor;
                 // We don't want the physics engine mucking up the rotations in a linkset
-                if ((_parentID == 0) && (Shape.PCode != 9 || Shape.State == 0)  && (pa != null))
+                if ((_parentID == 0) && (Shape.PCode != 9 || Shape.State == 0)  && (PhysActor != null))
                 {
-                    if (pa.Orientation.X != 0 || pa.Orientation.Y != 0
-                        || pa.Orientation.Z != 0 || pa.Orientation.W != 0)
+                    if (PhysActor.Orientation.X != 0 || PhysActor.Orientation.Y != 0
+                        || PhysActor.Orientation.Z != 0 || PhysActor.Orientation.W != 0)
                     {
-                        m_rotationOffset = pa.Orientation;
+                        m_rotationOffset = PhysActor.Orientation;
                     }
                 }
                 
@@ -616,28 +610,27 @@ namespace OpenSim.Region.Framework.Scenes
             
             set
             {
-                PhysicsActor pa = PhysActor;
                 StoreUndoState();
                 m_rotationOffset = value;
 
-                if (pa != null)
+                if (PhysActor != null)
                 {
                     try
                     {
                         // Root prim gets value directly
                         if (_parentID == 0)
                         {
-                            pa.Orientation = value;
+                            PhysActor.Orientation = value;
                             //m_log.Info("[PART]: RO1:" + PhysActor.Orientation.ToString());
                         }
                         else
                         {
                             // Child prim we have to calculate it's world rotationwel
                             Quaternion resultingrotation = GetWorldRotation();
-                            pa.Orientation = resultingrotation;
+                            PhysActor.Orientation = resultingrotation;
                             //m_log.Info("[PART]: RO2:" + PhysActor.Orientation.ToString());
                         }
-                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                         //}
                     }
                     catch (Exception ex)
@@ -657,14 +650,13 @@ namespace OpenSim.Region.Framework.Scenes
                 //if (PhysActor.Velocity.X != 0 || PhysActor.Velocity.Y != 0
                 //|| PhysActor.Velocity.Z != 0)
                 //{
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    if (pa.IsPhysical)
+                    if (PhysActor.IsPhysical)
                     {
-                        m_velocity.X = pa.Velocity.X;
-                        m_velocity.Y = pa.Velocity.Y;
-                        m_velocity.Z = pa.Velocity.Z;
+                        m_velocity.X = PhysActor.Velocity.X;
+                        m_velocity.Y = PhysActor.Velocity.Y;
+                        m_velocity.Z = PhysActor.Velocity.Z;
                     }
                 }
 
@@ -674,13 +666,12 @@ namespace OpenSim.Region.Framework.Scenes
             set
             {
                 m_velocity = value;
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    if (pa.IsPhysical)
+                    if (PhysActor.IsPhysical)
                     {
-                        pa.Velocity = new PhysicsVector(value.X, value.Y, value.Z);
-                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                        PhysActor.Velocity = new PhysicsVector(value.X, value.Y, value.Z);
+                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                     }
                 }
             }
@@ -697,10 +688,9 @@ namespace OpenSim.Region.Framework.Scenes
         {
             get
             {
-                PhysicsActor pa = PhysActor;
-                if ((pa != null) && pa.IsPhysical)
+                if ((PhysActor != null) && PhysActor.IsPhysical)
                 {
-                    m_angularVelocity.FromBytes(pa.RotationalVelocity.GetBytes(), 0);
+                    m_angularVelocity.FromBytes(PhysActor.RotationalVelocity.GetBytes(), 0);
                 }
                 return m_angularVelocity;
             }
@@ -719,11 +709,10 @@ namespace OpenSim.Region.Framework.Scenes
             get { return m_description; }
             set 
             {
-                PhysicsActor pa = PhysActor;
                 m_description = value;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    pa.SOPDescription = value;
+                    PhysActor.SOPDescription = value;
                 }
             }
         }
@@ -817,15 +806,14 @@ namespace OpenSim.Region.Framework.Scenes
 if (m_shape != null) {
                 m_shape.Scale = value;
 
-                PhysicsActor pa = PhysActor;
-                if (pa != null && m_parentGroup != null)
+                if (PhysActor != null && m_parentGroup != null)
                 {
                     if (m_parentGroup.Scene != null)
                     {
                         if (m_parentGroup.Scene.PhysicsScene != null)
                         {
-                            pa.Size = new PhysicsVector(m_shape.Scale.X, m_shape.Scale.Y, m_shape.Scale.Z);
-                            m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                            PhysActor.Size = new PhysicsVector(m_shape.Scale.X, m_shape.Scale.Y, m_shape.Scale.Z);
+                            m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                         }
                     }
                 }
@@ -1355,14 +1343,13 @@ if (m_shape != null) {
                         RigidBody);
 
                     // Basic Physics returns null..  joy joy joy.
-                    PhysicsActor pa = PhysActor;
-                    if (pa != null)
+                    if (PhysActor != null)
                     {
-                        pa.SOPName = this.Name; // save object name and desc into the PhysActor so ODE internals know the joint/body info
-                        pa.SOPDescription = this.Description;
-                        pa.LocalID = LocalId;
+                        PhysActor.SOPName = this.Name; // save object name and desc into the PhysActor so ODE internals know the joint/body info
+                        PhysActor.SOPDescription = this.Description;
+                        PhysActor.LocalID = LocalId;
                         DoPhysicsPropertyUpdate(RigidBody, true);
-                        pa.SetVolumeDetect(VolumeDetectActive ? 1 : 0);
+                        PhysActor.SetVolumeDetect(VolumeDetectActive ? 1 : 0);
                     }
                 }
             }
@@ -1576,24 +1563,23 @@ if (m_shape != null) {
             }
             else
             {
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    if (UsePhysics != pa.IsPhysical || isNew)
+                    if (UsePhysics != PhysActor.IsPhysical || isNew)
                     {
-                        if (pa.IsPhysical) // implies UsePhysics==false for this block
+                        if (PhysActor.IsPhysical) // implies UsePhysics==false for this block
                         {
                             if (!isNew)
                                 ParentGroup.Scene.RemovePhysicalPrim(1);
 
-                            pa.OnRequestTerseUpdate -= PhysicsRequestingTerseUpdate;
-                            pa.OnOutOfBounds -= PhysicsOutOfBounds;
-                            pa.delink();
+                            PhysActor.OnRequestTerseUpdate -= PhysicsRequestingTerseUpdate;
+                            PhysActor.OnOutOfBounds -= PhysicsOutOfBounds;
+                            PhysActor.delink();
 
                             if (ParentGroup.Scene.PhysicsScene.SupportsNINJAJoints && (!isNew))
                             {
                                 // destroy all joints connected to this now deactivated body
-                                m_parentGroup.Scene.PhysicsScene.RemoveAllJointsConnectedToActorThreadLocked(pa);
+                                m_parentGroup.Scene.PhysicsScene.RemoveAllJointsConnectedToActorThreadLocked(PhysActor);
                             }
 
                             // stop client-side interpolation of all joint proxy objects that have just been deleted
@@ -1612,7 +1598,7 @@ if (m_shape != null) {
                             //RotationalVelocity = new Vector3(0, 0, 0);
                         }
 
-                        pa.IsPhysical = UsePhysics;
+                        PhysActor.IsPhysical = UsePhysics;
 
 
                         // If we're not what we're supposed to be in the physics scene, recreate ourselves.
@@ -1626,19 +1612,19 @@ if (m_shape != null) {
                             {
                                 ParentGroup.Scene.AddPhysicalPrim(1);
 
-                                pa.OnRequestTerseUpdate += PhysicsRequestingTerseUpdate;
-                                pa.OnOutOfBounds += PhysicsOutOfBounds;
+                                PhysActor.OnRequestTerseUpdate += PhysicsRequestingTerseUpdate;
+                                PhysActor.OnOutOfBounds += PhysicsOutOfBounds;
                                 if (_parentID != 0 && _parentID != LocalId)
                                 {
                                     if (ParentGroup.RootPart.PhysActor != null)
                                     {
-                                        pa.link(ParentGroup.RootPart.PhysActor);
+                                        PhysActor.link(ParentGroup.RootPart.PhysActor);
                                     }
                                 }
                             }
                         }
                     }
-                    m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                    m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                 }
             }
         }
@@ -1704,10 +1690,9 @@ if (m_shape != null) {
 
         public Vector3 GetGeometricCenter()
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                return new Vector3(pa.CenterOfMass.X, pa.CenterOfMass.Y, pa.CenterOfMass.Z);
+                return new Vector3(PhysActor.CenterOfMass.X, PhysActor.CenterOfMass.Y, PhysActor.CenterOfMass.Z);
             }
             else
             {
@@ -1717,10 +1702,9 @@ if (m_shape != null) {
 
         public float GetMass()
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                return pa.Mass;
+                return PhysActor.Mass;
             }
             else
             {
@@ -1730,9 +1714,8 @@ if (m_shape != null) {
 
         public PhysicsVector GetForce()
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
-                return pa.Force;
+            if (PhysActor != null)
+                return PhysActor.Force;
             else
                 return new PhysicsVector();
         }
@@ -2111,15 +2094,11 @@ if (m_shape != null) {
 
         public void PhysicsRequestingTerseUpdate()
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                Vector3 newpos = new Vector3(pa.Position.GetBytes(), 0);
+                Vector3 newpos = new Vector3(PhysActor.Position.GetBytes(), 0);
                 
-                if (m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.N) | 
-                    m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.S) | 
-                    m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.E) | 
-                    m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.W))
+                if (m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.N) | m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.S) | m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.E) | m_parentGroup.Scene.TestBorderCross(newpos, Cardinals.W))
                 {
                     m_parentGroup.AbsolutePosition = newpos;
                     return;
@@ -2315,15 +2294,14 @@ if (m_shape != null) {
                     if (texture != null)
                         m_shape.SculptData = texture.Data;
 
-                    PhysicsActor pa = PhysActor;
-                    if (pa != null)
+                    if (PhysActor != null)
                     {
                         // Tricks physics engine into thinking we've changed the part shape.
                         PrimitiveBaseShape m_newshape = m_shape.Copy();
-                        pa.Shape = m_newshape;
+                        PhysActor.Shape = m_newshape;
                         m_shape = m_newshape;
 
-                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                        m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
                     }
                 }
             }
@@ -2542,10 +2520,9 @@ if (m_shape != null) {
 
         public void SetBuoyancy(float fvalue)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.Buoyancy = fvalue;
+                PhysActor.Buoyancy = fvalue;
             }
         }
 
@@ -2561,62 +2538,56 @@ if (m_shape != null) {
 
         public void SetFloatOnWater(int floatYN)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
                 if (floatYN == 1)
                 {
-                    pa.FloatOnWater = true;
+                    PhysActor.FloatOnWater = true;
                 }
                 else
                 {
-                    pa.FloatOnWater = false;
+                    PhysActor.FloatOnWater = false;
                 }
             }
         }
 
         public void SetForce(PhysicsVector force)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.Force = force;
+                PhysActor.Force = force;
             }
         }
 
         public void SetVehicleType(int type)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.VehicleType = type;
+                PhysActor.VehicleType = type;
             }
         }
 
         public void SetVehicleFloatParam(int param, float value)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.VehicleFloatParam(param, value);
+                PhysActor.VehicleFloatParam(param, value);
             }
         }
 
         public void SetVehicleVectorParam(int param, PhysicsVector value)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.VehicleVectorParam(param, value);
+                PhysActor.VehicleVectorParam(param, value);
             }
         }
 
         public void SetVehicleRotationParam(int param, Quaternion rotation)
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.VehicleRotationParam(param, rotation);
+                PhysActor.VehicleRotationParam(param, rotation);
             }
         }
 
@@ -2644,11 +2615,10 @@ if (m_shape != null) {
 
         public void SetPhysicsAxisRotation()
         {
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.LockAngularMotion(RotationAxis);
-                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                PhysActor.LockAngularMotion(RotationAxis);
+                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
             }
         }
 
@@ -3380,9 +3350,8 @@ if (m_shape != null) {
                 {
                     IsVD = false;               // Switch it of for the course of this routine
                     VolumeDetectActive = false; // and also permanently
-                    PhysicsActor pa = PhysActor;
-                    if (pa != null)
-                        pa.SetVolumeDetect(0);   // Let physics know about it too
+                    if (PhysActor != null)
+                        PhysActor.SetVolumeDetect(0);   // Let physics know about it too
                 }
                 else
                 {
@@ -3430,19 +3399,17 @@ if (m_shape != null) {
             if (IsPhantom || IsAttachment) // note: this may have been changed above in the case of joints
             {
                 AddFlag(PrimFlags.Phantom);
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    m_parentGroup.Scene.PhysicsScene.RemovePrim(pa);
+                    m_parentGroup.Scene.PhysicsScene.RemovePrim(PhysActor);
                     /// that's not wholesome.  Had to make Scene public
-                    pa = null;
+                    PhysActor = null;
                 }
             }
             else // Not phantom
             {
                 RemFlag(PrimFlags.Phantom);
 
-                // This is NOT safe!!
                 PhysicsActor pa = PhysActor;
                 if (pa == null)
                 {
@@ -3477,8 +3444,8 @@ if (m_shape != null) {
                             (CollisionSound != UUID.Zero)
                             )
                         {
-                                pa.OnCollisionUpdate += PhysicsCollision;
-                                pa.SubscribeEvents(1000);
+                                PhysActor.OnCollisionUpdate += PhysicsCollision;
+                                PhysActor.SubscribeEvents(1000);
                         }
                     }
                 }
@@ -3507,10 +3474,9 @@ if (m_shape != null) {
                 // Defensive programming calls for a check here.
                 // Better would be throwing an exception that could be catched by a unit test as the internal 
                 // logic should make sure, this Physactor is always here.
-                PhysicsActor pa = this.PhysActor;
-                if (pa != null)
+                if (this.PhysActor != null)
                 {
-                    pa.SetVolumeDetect(1);
+                    PhysActor.SetVolumeDetect(1);
                     AddFlag(PrimFlags.Phantom); // We set this flag also if VD is active
                     this.VolumeDetectActive = true;
                 }
@@ -3521,7 +3487,7 @@ if (m_shape != null) {
                 PhysicsActor pa = this.PhysActor;
                 if (pa != null)
                 {
-                    pa.SetVolumeDetect(0);
+                    PhysActor.SetVolumeDetect(0);
                 }
                 this.VolumeDetectActive = false;
             }
@@ -3579,11 +3545,10 @@ if (m_shape != null) {
             m_shape.PathTaperY = shapeBlock.PathTaperY;
             m_shape.PathTwist = shapeBlock.PathTwist;
             m_shape.PathTwistBegin = shapeBlock.PathTwistBegin;
-            PhysicsActor pa = PhysActor;
-            if (pa != null)
+            if (PhysActor != null)
             {
-                pa.Shape = m_shape;
-                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(pa);
+                PhysActor.Shape = m_shape;
+                m_parentGroup.Scene.PhysicsScene.AddPhysicsActorTaint(PhysActor);
             }
 
             // This is what makes vehicle trailers work
@@ -3684,21 +3649,19 @@ if (m_shape != null) {
                 )
             {
                 // subscribe to physics updates.
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    pa.OnCollisionUpdate += PhysicsCollision;
-                    pa.SubscribeEvents(1000);
+                    PhysActor.OnCollisionUpdate += PhysicsCollision;
+                    PhysActor.SubscribeEvents(1000);
 
                 }
             }
             else
             {
-                PhysicsActor pa = PhysActor;
-                if (pa != null)
+                if (PhysActor != null)
                 {
-                    pa.UnSubscribeEvents();
-                    pa.OnCollisionUpdate -= PhysicsCollision;
+                    PhysActor.UnSubscribeEvents();
+                    PhysActor.OnCollisionUpdate -= PhysicsCollision;
                 }
             }
 
@@ -3801,8 +3764,6 @@ if (m_shape != null) {
                     lPos = AbsolutePosition;
             }
 
-            // Causes this thread to dig into the Client Thread Data.
-            // Remember your locking here!
             remoteClient.SendPrimTerseUpdate(m_regionHandle,
                     (ushort)(m_parentGroup.GetTimeDilation() *
                     (float)ushort.MaxValue), LocalId, lPos,
diff --git a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
index e15dc84..b3d10df 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
@@ -70,7 +70,7 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             grp1.Rotation = (Quaternion.CreateFromEulers(90 * Utils.DEG_TO_RAD, 0, 0));
 
             // <180,0,0>
-            grp2.UpdateGroupRotation(Quaternion.CreateFromEulers(180 * Utils.DEG_TO_RAD, 0, 0));
+            grp2.UpdateGroupRotationR(Quaternion.CreateFromEulers(180 * Utils.DEG_TO_RAD, 0, 0));
             
             // Required for linking
             grp1.RootPart.UpdateFlag = 0;
@@ -154,13 +154,13 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             grp1.Rotation = (Quaternion.CreateFromEulers(90 * Utils.DEG_TO_RAD, 0, 0));
 
             // <180,0,0>
-            grp2.UpdateGroupRotation(Quaternion.CreateFromEulers(180 * Utils.DEG_TO_RAD, 0, 0));
+            grp2.UpdateGroupRotationR(Quaternion.CreateFromEulers(180 * Utils.DEG_TO_RAD, 0, 0));
 
             // <270,0,0>
             grp3.Rotation = (Quaternion.CreateFromEulers(270 * Utils.DEG_TO_RAD, 0, 0));
 
             // <0,90,0>
-            grp4.UpdateGroupRotation(Quaternion.CreateFromEulers(0, 90 * Utils.DEG_TO_RAD, 0));
+            grp4.UpdateGroupRotationR(Quaternion.CreateFromEulers(0, 90 * Utils.DEG_TO_RAD, 0));
 
             // Required for linking
             grp1.RootPart.UpdateFlag = 0;