9 files changed, 158 insertions, 176 deletions

diff --git a/OpenSim/Framework/AgentCircuitData.cs b/OpenSim/Framework/AgentCircuitData.cs
index cc9fcea..1600bdc 100644
--- a/OpenSim/Framework/AgentCircuitData.cs
+++ b/OpenSim/Framework/AgentCircuitData.cs
@@ -302,31 +302,26 @@ namespace OpenSim.Framework
             if (args["start_pos"] != null)
                 Vector3.TryParse(args["start_pos"].AsString(), out startpos);
 
-// DEBUG ON
-            m_log.WarnFormat("[AGENTCIRCUITDATA] agentid={0}, child={1}, startpos={2}",AgentID,child,startpos.ToString());
-// DEBUG OFF
+            m_log.InfoFormat("[AGENTCIRCUITDATA] agentid={0}, child={1}, startpos={2}",AgentID,child,startpos.ToString());
             
             try {
-            // Unpack various appearance elements
-            Appearance = new AvatarAppearance(AgentID);
+                // Unpack various appearance elements
+                Appearance = new AvatarAppearance(AgentID);
 
-            // Eventually this code should be deprecated, use full appearance
-            // packing in packed_appearance
-            if (args["appearance_serial"] != null)
-                Appearance.Serial = args["appearance_serial"].AsInteger();
+                // Eventually this code should be deprecated, use full appearance
+                // packing in packed_appearance
+                if (args["appearance_serial"] != null)
+                    Appearance.Serial = args["appearance_serial"].AsInteger();
 
-            if (args.ContainsKey("packed_appearance") && (args["packed_appearance"].Type == OSDType.Map))
-            {
-                Appearance.Unpack((OSDMap)args["packed_appearance"]);
-// DEBUG ON
-                m_log.WarnFormat("[AGENTCIRCUITDATA] unpacked appearance");
-// DEBUG OFF
+                if (args.ContainsKey("packed_appearance") && (args["packed_appearance"].Type == OSDType.Map))
+                {
+                    Appearance.Unpack((OSDMap)args["packed_appearance"]);
+                    m_log.InfoFormat("[AGENTCIRCUITDATA] unpacked appearance");
+                }
+                else
+                    m_log.Warn("[AGENTCIRCUITDATA] failed to find a valid packed_appearance");
             }
-// DEBUG ON
-            else
-                m_log.Warn("[AGENTCIRCUITDATA] failed to find a valid packed_appearance");
-// DEBUG OFF
-            } catch (Exception e)
+            catch (Exception e)
             {
                 m_log.ErrorFormat("[AGENTCIRCUITDATA] failed to unpack appearance; {0}",e.Message);
             }
diff --git a/OpenSim/Framework/ChildAgentDataUpdate.cs b/OpenSim/Framework/ChildAgentDataUpdate.cs
index a227338..ce0b2fb 100644
--- a/OpenSim/Framework/ChildAgentDataUpdate.cs
+++ b/OpenSim/Framework/ChildAgentDataUpdate.cs
@@ -331,9 +331,7 @@ namespace OpenSim.Framework
 
         public virtual OSDMap Pack()
         {
-// DEBUG ON
-            m_log.WarnFormat("[CHILDAGENTDATAUPDATE] Pack data");
-// DEBUG OFF
+            m_log.InfoFormat("[CHILDAGENTDATAUPDATE] Pack data");
 
             OSDMap args = new OSDMap();
             args["message_type"] = OSD.FromString("AgentData");
@@ -454,9 +452,7 @@ namespace OpenSim.Framework
         /// <param name="hash"></param>
         public virtual void Unpack(OSDMap args)
         {
-// DEBUG ON
-            m_log.WarnFormat("[CHILDAGENTDATAUPDATE] Unpack data");
-// DEBUG OFF
+            m_log.InfoFormat("[CHILDAGENTDATAUPDATE] Unpack data");
 
             if (args.ContainsKey("region_id"))
                 UUID.TryParse(args["region_id"].AsString(), out RegionID);
@@ -613,10 +609,8 @@ namespace OpenSim.Framework
 
             if (args.ContainsKey("packed_appearance") && (args["packed_appearance"]).Type == OSDType.Map)
                 Appearance = new AvatarAppearance(AgentID,(OSDMap)args["packed_appearance"]);
-// DEBUG ON
             else
                 m_log.WarnFormat("[CHILDAGENTDATAUPDATE] No packed appearance");
-// DEBUG OFF
 
             if ((args["controllers"] != null) && (args["controllers"]).Type == OSDType.Array)
             {
diff --git a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
index 0df4585..ab1c206 100644
--- a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
@@ -183,7 +183,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                                 });
                     }
 
-                    // m_log.WarnFormat("[AVFACTORY]: Complete texture check for {0}",client.AgentId);
+                    m_log.WarnFormat("[AVFACTORY]: Complete texture check for {0}",client.AgentId);
                 }
 
                 // Process the visual params, this may change height as well
@@ -196,12 +196,6 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                             sp.SetHeight(sp.Appearance.AvatarHeight);
                     }
                 }
-
-                // Send the appearance back to the avatar, not clear that this is needed
-                sp.ControllingClient.SendAvatarDataImmediate(sp);
-                // AvatarAppearance avp = sp.Appearance;
-                // sp.ControllingClient.SendAppearance(avp.Owner,avp.VisualParams,avp.Texture.GetBytes());
-
             }
             
 
@@ -274,21 +268,6 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
 
             // Send the appearance to everyone in the scene
             sp.SendAppearanceToAllOtherAgents();
-            // sp.ControllingClient.SendAvatarDataImmediate(sp);
-
-            // Send the appearance back to the avatar
-            // AvatarAppearance avp = sp.Appearance;
-            // sp.ControllingClient.SendAppearance(avp.Owner, avp.VisualParams, avp.Texture.GetBytes());
-
-/*
-//  this needs to be fixed, the flag should be on scene presence not the region module
-            // Start the animations if necessary
-            if (!m_startAnimationSet)
-            {
-                sp.Animator.UpdateMovementAnimations();
-                m_startAnimationSet = true;
-            }
-*/
         }
 
         private void HandleAppearanceSave(UUID agentid)
@@ -374,6 +353,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
 
             // m_log.WarnFormat("[AVFACTORY]: AvatarIsWearing called for {0}", client.AgentId);
 
+            // operate on a copy of the appearance so we don't have to lock anything
             AvatarAppearance avatAppearance = new AvatarAppearance(sp.Appearance, false);
 
             foreach (AvatarWearingArgs.Wearable wear in e.NowWearing)
@@ -388,9 +368,11 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
             SetAppearanceAssets(sp.UUID, ref avatAppearance);
 
             // could get fancier with the locks here, but in the spirit of "last write wins"
-            // this should work correctly
+            // this should work correctly, also, we don't need to send the appearance here
+            // since the "iswearing" will trigger a new set of visual param and baked texture changes
+            // when those complete, the new appearance will be sent
             sp.Appearance = avatAppearance;
-            m_scene.AvatarService.SetAppearance(client.AgentId, sp.Appearance);
+            QueueAppearanceSave(client.AgentId);
         }
 
         private void SetAppearanceAssets(UUID userID, ref AvatarAppearance appearance)
diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index 81d6f70..aa7a1cd 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -925,8 +925,10 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 }
 
                 agent.MakeChildAgent();
+
                 // now we have a child agent in this region. Request all interesting data about other (root) agents
-                agent.SendInitialFullUpdateToAllClients();
+                agent.SendOtherAgentsAvatarDataToMe();
+                agent.SendOtherAgentsAppearanceToMe();
 
                 CrossAttachmentsIntoNewRegion(neighbourRegion, agent, true);
 
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index f3964c2..bcb715b 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -398,7 +398,7 @@ namespace OpenSim.Region.Framework.Scenes
                             Vector3 offset = p.GetWorldPosition() - av.ParentPosition;
                             av.AbsolutePosition += offset;
                             av.ParentPosition = p.GetWorldPosition(); //ParentPosition gets cleared by AbsolutePosition
-                            av.SendFullUpdateToAllClients();
+                            av.SendAvatarDataToAllAgents();
                         }
                     }
                 }
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index bdd42fc..8cc2be1 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -803,7 +803,7 @@ namespace OpenSim.Region.Framework.Scenes
                             {
                                 Vector3 offset = (m_offsetPosition - oldpos);
                                 av.OffsetPosition += offset;
-                                av.SendFullUpdateToAllClients();
+                                av.SendAvatarDataToAllAgents();
                             }
                         }
                     }
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index c35df08..98a3b29 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -767,7 +767,9 @@ namespace OpenSim.Region.Framework.Scenes
             // Note: This won't send data *to* other clients in that region (children don't send)
 
 // MIC: This gets called again in CompleteMovement
-            SendInitialFullUpdateToAllClients();
+            // SendInitialFullUpdateToAllClients();
+            SendOtherAgentsAvatarDataToMe();
+            SendOtherAgentsAppearanceToMe();
 
             RegisterToEvents();
             SetDirectionVectors();
@@ -1757,7 +1759,7 @@ namespace OpenSim.Region.Framework.Scenes
                     {
                         AbsolutePosition = part.AbsolutePosition;
                         Velocity = Vector3.Zero;
-                        SendFullUpdateToAllClients();
+                        SendAvatarDataToAllAgents();
 
                         HandleAgentSit(ControllingClient, m_requestedSitTargetUUID);  //KF ??
                     }
@@ -1867,7 +1869,7 @@ namespace OpenSim.Region.Framework.Scenes
                                 m_parentID = 0;
                 m_linkedPrim = UUID.Zero;
                 m_offsetRotation = new Quaternion(0.0f, 0.0f, 0.0f, 1.0f);
-                SendFullUpdateToAllClients();
+                SendAvatarDataToAllAgents();
                 m_requestedSitTargetID = 0;
                 if (m_physicsActor != null && m_appearance != null)
                 {
@@ -2462,8 +2464,8 @@ namespace OpenSim.Region.Framework.Scenes
             Velocity = Vector3.Zero;
             RemoveFromPhysicalScene();
             Animator.TrySetMovementAnimation(sitAnimation);
-            SendFullUpdateToAllClients();
-            SendTerseUpdateToAllClients();
+            SendAvatarDataToAllAgents();
+            //SendTerseUpdateToAllClients();
         }
         
         public void SitAltitudeCallback(bool hitYN, Vector3 collisionPoint, uint localid, float distance, Vector3 normal)
@@ -2742,165 +2744,169 @@ namespace OpenSim.Region.Framework.Scenes
         }
 
         /// <summary>
-        /// Tell other client about this avatar (The client previously didn't know or had outdated details about this avatar)
+        /// Do everything required once a client completes its movement into a region and becomes
+        /// a root agent.
         /// </summary>
-        /// <param name="remoteAvatar"></param>
-        public void SendFullUpdateToOtherClient(ScenePresence remoteAvatar)
+        private void SendInitialData()
         {
-            // 2 stage check is needed.
-            if (remoteAvatar == null)
-                return;
+            // Moved this into CompleteMovement to ensure that m_appearance is initialized before
+            // the inventory arrives
+            // m_scene.GetAvatarAppearance(m_controllingClient, out m_appearance);
 
-            IClientAPI cl = remoteAvatar.ControllingClient;
-            if (cl == null)
-                return;
+            // This agent just became root. We are going to tell everyone about it. The process of
+            // getting other avatars information was initiated in the constructor... don't do it 
+            // again here... 
+            SendAvatarDataToAllAgents();
 
-            if (m_appearance.Texture == null)
-                return;
-
-// MT: This is needed for sit. It's legal to send it to oneself, and the name
-//     of the method is a misnomer
-//
-//            if (LocalId == remoteAvatar.LocalId)
-//            {
-//                m_log.WarnFormat("[SCENEPRESENCE]: An agent is attempting to send avatar data to itself; {0}", UUID);
-//                return;
-//            }
+            // We have an appearance but we may not have the baked textures. Check the asset cache 
+            // to see if all the baked textures are already here. 
+            if (m_scene.AvatarFactory != null)
+            {
+                if (m_scene.AvatarFactory.ValidateBakedTextureCache(m_controllingClient))
+                {
+//                    m_log.WarnFormat("[SCENEPRESENCE]: baked textures are in the cache for {0}", Name);
+                    SendAppearanceToAgent(this);
 
-            if (IsChildAgent)
+                    // If the avatars baked textures are all in the cache, then we have a 
+                    // complete appearance... send it out, if not, then we'll send it when
+                    // the avatar finishes updating its appearance
+                    SendAppearanceToAllOtherAgents();
+                }
+            }
+            else
             {
-                m_log.WarnFormat("[SCENEPRESENCE]: A child agent is attempting to send out avatar data; {0}", UUID);
-                return;
+                m_log.WarnFormat("[SCENEPRESENCE]: AvatarFactory not set for {0}", Name);
             }
-            
-            remoteAvatar.m_controllingClient.SendAvatarDataImmediate(this);
-            m_scene.StatsReporter.AddAgentUpdates(1);
         }
 
         /// <summary>
-        /// Tell *ALL* agents about this agent
+        /// Send this agent's avatar data to all other root and child agents in the scene
+        /// This agent must be root. This avatar will receive its own update. 
         /// </summary>
-        public void SendInitialFullUpdateToAllClients()
+        public void SendAvatarDataToAllAgents()
         {
-            m_perfMonMS = Util.EnvironmentTickCount();
-            int avUpdates = 0;
-            m_scene.ForEachScenePresence(delegate(ScenePresence avatar)
+            // only send update from root agents to other clients; children are only "listening posts"
+            if (IsChildAgent)
             {
-                ++avUpdates;
-
-                // Don't update ourselves
-                if (avatar.LocalId == LocalId)
-                    return;
-                
-                // If this is a root agent, then get info about the avatar
-                if (!IsChildAgent)
-                {
-                    SendFullUpdateToOtherClient(avatar);
-                }
+                m_log.Warn("[SCENEPRESENCE] attempt to send avatar data from a child agent");
+                return;
+            }
+            
+            m_perfMonMS = Util.EnvironmentTickCount();
 
-                // If the other avatar is a root
-                if (!avatar.IsChildAgent)
-                {
-                    avatar.SendFullUpdateToOtherClient(this);
-                    avatar.SendAppearanceToOtherAgent(this);
-                    avatar.Animator.SendAnimPackToClient(ControllingClient);
-                }
-            });
+            int count = 0;
+            m_scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
+                                         {
+                                             SendAvatarDataToAgent(scenePresence);
+                                             count++;
+                                         });
 
-            m_scene.StatsReporter.AddAgentUpdates(avUpdates);
+            m_scene.StatsReporter.AddAgentUpdates(count);
             m_scene.StatsReporter.AddAgentTime(Util.EnvironmentTickCountSubtract(m_perfMonMS));
-
-            //Animator.SendAnimPack();
         }
 
-        public void SendFullUpdateToAllClients()
+        /// <summary>
+        /// Send avatar data for all other root agents to this agent, this agent
+        /// can be either a child or root
+        /// </summary>
+        public void SendOtherAgentsAvatarDataToMe()
         {
             m_perfMonMS = Util.EnvironmentTickCount();
 
-            // only send update from root agents to other clients; children are only "listening posts"
-            if (IsChildAgent)
-            {
-                m_log.Warn("[SCENEPRESENCE] attempt to send update from a childagent");
-                return;
-            }
-            
             int count = 0;
-            m_scene.ForEachScenePresence(delegate(ScenePresence sp)
-            {
-                if (sp.IsChildAgent)
-                    return;
-                SendFullUpdateToOtherClient(sp);
-                ++count;
-            });
+            m_scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
+                                         {
+                                             // only send information about root agents
+                                             if (scenePresence.IsChildAgent)
+                                                 return;
+                                             
+                                             // only send information about other root agents
+                                             if (scenePresence.UUID == UUID)
+                                                 return;
+                                             
+                                             scenePresence.SendAvatarDataToAgent(this);
+                                             count++;
+                                         });
+
             m_scene.StatsReporter.AddAgentUpdates(count);
             m_scene.StatsReporter.AddAgentTime(Util.EnvironmentTickCountSubtract(m_perfMonMS));
-
-            Animator.SendAnimPack();
         }
 
         /// <summary>
-        /// Do everything required once a client completes its movement into a region
+        /// Send avatar data to an agent.
         /// </summary>
-        public void SendInitialData()
+        /// <param name="avatar"></param>
+        private void SendAvatarDataToAgent(ScenePresence avatar)
         {
-            // Moved this into CompleteMovement to ensure that m_appearance is initialized before
-            // the inventory arrives
-            // m_scene.GetAvatarAppearance(m_controllingClient, out m_appearance);
+//            m_log.WarnFormat("[SP] Send avatar data from {0} to {1}",m_uuid,avatar.ControllingClient.AgentId);
 
-            m_controllingClient.SendAvatarDataImmediate(this);
-            if (m_scene.AvatarFactory != null)
-            {
-                if (m_scene.AvatarFactory.ValidateBakedTextureCache(m_controllingClient))
-                {
-//                    m_log.WarnFormat("[SCENEPRESENCE]: baked textures are in the cache for {0}", Name);
-                    m_controllingClient.SendAppearance(
-                        m_appearance.Owner,m_appearance.VisualParams,m_appearance.Texture.GetBytes());
-                }
-            }
-            else
+            avatar.ControllingClient.SendAvatarDataImmediate(this);
+            Animator.SendAnimPackToClient(avatar.ControllingClient);
+        }
+
+        /// <summary>
+        /// Send this agent's appearance to all other root and child agents in the scene
+        /// This agent must be root.
+        /// </summary>
+        public void SendAppearanceToAllOtherAgents()
+        {
+            // only send update from root agents to other clients; children are only "listening posts"
+            if (IsChildAgent)
             {
-                m_log.WarnFormat("[SCENEPRESENCE]: AvatarFactory not set for {0}", Name);
+                m_log.Warn("[SCENEPRESENCE] attempt to send avatar data from a child agent");
+                return;
             }
+            
+            m_perfMonMS = Util.EnvironmentTickCount();
+
+            int count = 0;
+            m_scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
+                                         {
+                                             if (scenePresence.UUID == UUID)
+                                                 return;
 
-            SendInitialFullUpdateToAllClients();
+                                             SendAppearanceToAgent(scenePresence);
+                                             count++;
+                                         });
+
+            m_scene.StatsReporter.AddAgentUpdates(count);
+            m_scene.StatsReporter.AddAgentTime(Util.EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
         /// <summary>
-        ///
+        /// Send appearance from all other root agents to this agent. this agent
+        /// can be either root or child
         /// </summary>
-        public void SendAppearanceToAllOtherAgents()
+        public void SendOtherAgentsAppearanceToMe()
         {
-// DEBUG ON
-//            m_log.WarnFormat("[SCENEPRESENCE]: Send appearance from {0} to all other agents", m_uuid);
-// DEBUG OFF
             m_perfMonMS = Util.EnvironmentTickCount();
 
+            int count = 0;
             m_scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
                                          {
-                                             if (scenePresence.UUID != UUID)
-                                             {
-                                                 SendAppearanceToOtherAgent(scenePresence);
-                                             }
+                                             // only send information about root agents
+                                             if (scenePresence.IsChildAgent)
+                                                 return;
+                                             
+                                             // only send information about other root agents
+                                             if (scenePresence.UUID == UUID)
+                                                 return;
+                                             
+                                             scenePresence.SendAppearanceToAgent(this);
+                                             count++;
                                          });
 
+            m_scene.StatsReporter.AddAgentUpdates(count);
             m_scene.StatsReporter.AddAgentTime(Util.EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
         /// <summary>
-        /// Send appearance data to an agent that isn't this one.
+        /// Send appearance data to an agent.
         /// </summary>
         /// <param name="avatar"></param>
-        public void SendAppearanceToOtherAgent(ScenePresence avatar)
+        private void SendAppearanceToAgent(ScenePresence avatar)
         {
-            if (LocalId == avatar.LocalId)
-            {
-                m_log.WarnFormat("[SCENE PRESENCE]: An agent is attempting to send appearance data to itself; {0}", UUID);
-                return;
-            }
-
-// DEBUG ON
 //          m_log.WarnFormat("[SP] Send appearance from {0} to {1}",m_uuid,avatar.ControllingClient.AgentId);
-// DEBUG OFF
 
             avatar.ControllingClient.SendAppearance(
                 m_appearance.Owner, m_appearance.VisualParams, m_appearance.Texture.GetBytes());
@@ -3413,9 +3419,6 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void CopyFrom(AgentData cAgent)
         {
-// DEBUG ON
-            m_log.ErrorFormat("[SCENEPRESENCE] CALLING COPYFROM");
-// DEBUG OFF
             m_originRegionID = cAgent.RegionID;
 
             m_callbackURI = cAgent.CallbackURI;
diff --git a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/GroupsModule.cs b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/GroupsModule.cs
index 0c8113e..ccf5289 100644
--- a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/GroupsModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/GroupsModule.cs
@@ -1173,10 +1173,13 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
                 presence = scene.GetScenePresence(AgentID);
                 if (presence != null)
                 {
-                    presence.Grouptitle = Title;
+                    if (presence.Grouptitle != Title)
+                    {
+                        presence.Grouptitle = Title;
 
-                    // FixMe: Ter suggests a "Schedule" method that I can't find.
-                    presence.SendFullUpdateToAllClients();
+                        if (! presence.IsChildAgent)
+                            presence.SendAvatarDataToAllAgents();
+                    }
                 }
             }
         }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 7e9224d..1dd4ca4 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -4007,6 +4007,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 {
                     linknum -= (m_host.ParentGroup.PrimCount) + 1;
 
+                    if (linknum < 0)
+                        return UUID.Zero.ToString();
+
                     List<ScenePresence> avatars = GetLinkAvatars(ScriptBaseClass.LINK_SET);
                     if (avatars.Count > linknum)
                     {
@@ -6753,7 +6756,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 }
                 if (buttons.Data[i].ToString().Length > 24)
                 {
-                    LSLError("button label cannot be longer than 24 characters");
+                    llWhisper(ScriptBaseClass.DEBUG_CHANNEL, "button label cannot be longer than 24 characters");
                     return;
                 }
                 buts[i] = buttons.Data[i].ToString();
@@ -7316,7 +7319,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                         LSL_Vector v;
                         v = rules.GetVector3Item(idx++);
                         av.OffsetPosition = new Vector3((float)v.x, (float)v.y, (float)v.z);
-                        av.SendFullUpdateToAllClients();
+                        av.SendAvatarDataToAllAgents();
 
                         break;
 
@@ -7326,7 +7329,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                         LSL_Rotation r;
                         r = rules.GetQuaternionItem(idx++);
                         av.OffsetRotation = new Quaternion((float)r.x, (float)r.y, (float)r.z, (float)r.s);
-                        av.SendFullUpdateToAllClients();
+                        av.SendAvatarDataToAllAgents();
                         break;
                 }
             }