3 files changed, 183 insertions, 52 deletions

diff --git a/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs b/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs
index c38ecd9..76f1641 100644
--- a/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs
@@ -35,6 +35,8 @@ using OpenSim.Region.Framework.Scenes;
 
 namespace OpenSim.Region.Framework.Interfaces
 {
+    public delegate ScenePresence CrossAgentToNewRegionDelegate(ScenePresence agent, Vector3 pos, uint neighbourx, uint neighboury, GridRegion neighbourRegion, bool isFlying, string version);
+
     public interface IEntityTransferModule
     {
         void Teleport(ScenePresence agent, ulong regionHandle, Vector3 position,
@@ -53,7 +55,12 @@ namespace OpenSim.Region.Framework.Interfaces
 
         void EnableChildAgent(ScenePresence agent, GridRegion region);
 
+        GridRegion GetDestination(Scene scene, UUID agentID, Vector3 pos, out uint xDest, out uint yDest, out string version, out Vector3 newpos);
+
         void Cross(SceneObjectGroup sog, Vector3 position, bool silent);
+
+        ScenePresence CrossAgentToNewRegionAsync(ScenePresence agent, Vector3 pos, uint neighbourx, uint neighboury, GridRegion neighbourRegion, bool isFlying, string version);
+
     }
 
     public interface IUserAgentVerificationModule
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 683aafc..a4ca0fb 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -465,7 +465,77 @@ namespace OpenSim.Region.Framework.Scenes
                         || Scene.TestBorderCross(val - Vector3.UnitY, Cardinals.N) || Scene.TestBorderCross(val + Vector3.UnitY, Cardinals.S)) 
                         && !IsAttachmentCheckFull() && (!Scene.LoadingPrims))
                     {
-                        m_scene.CrossPrimGroupIntoNewRegion(val, this, true);
+                        IEntityTransferModule entityTransfer = m_scene.RequestModuleInterface<IEntityTransferModule>();
+                        uint x = 0;
+                        uint y = 0;
+                        string version = String.Empty;
+                        Vector3 newpos = Vector3.Zero;
+                        OpenSim.Services.Interfaces.GridRegion destination = null;
+
+                        bool canCross = true;
+                        foreach (ScenePresence av in m_linkedAvatars)
+                        {
+                            // We need to cross these agents. First, let's find
+                            // out if any of them can't cross for some reason.
+                            // We have to deny the crossing entirely if any
+                            // of them are banned. Alternatively, we could
+                            // unsit banned agents....
+
+
+                            // We set the avatar position as being the object
+                            // position to get the region to send to
+                            if ((destination = entityTransfer.GetDestination(m_scene, av.UUID, val, out x, out y, out version, out newpos)) == null)
+                            {
+                                canCross = false;
+                                break;
+                            }
+                            
+                            m_log.DebugFormat("[SCENE OBJECT]: Avatar {0} needs to be crossed to {1}", av.Name, destination.RegionName);
+                        }
+
+                        if (canCross)
+                        {
+                            // We unparent the SP quietly so that it won't
+                            // be made to stand up
+                            foreach (ScenePresence av in m_linkedAvatars)
+                            {
+                                SceneObjectPart parentPart = m_scene.GetSceneObjectPart(av.ParentID);
+                                if (parentPart != null)
+                                    av.ParentUUID = parentPart.UUID;
+
+                                av.ParentID = 0;
+                            }
+
+                            m_scene.CrossPrimGroupIntoNewRegion(val, this, true);
+
+                            // Normalize
+                            if (val.X >= Constants.RegionSize)
+                                val.X -= Constants.RegionSize;
+                            if (val.Y >= Constants.RegionSize)
+                                val.Y -= Constants.RegionSize;
+                            if (val.X < 0)
+                                val.X += Constants.RegionSize;
+                            if (val.Y < 0)
+                                val.Y += Constants.RegionSize;
+
+                            // If it's deleted, crossing was successful
+                            if (IsDeleted)
+                            {
+                                foreach (ScenePresence av in m_linkedAvatars)
+                                {
+                                    m_log.DebugFormat("[SCENE OBJECT]: Crossing avatar {0} to {1}", av.Name, val);
+
+                                    av.IsInTransit = true;
+
+                                    CrossAgentToNewRegionDelegate d = entityTransfer.CrossAgentToNewRegionAsync;
+                                    d.BeginInvoke(av, val, x, y, destination, av.Flying, version, CrossAgentToNewRegionCompleted, d);
+                                }
+
+                                return;
+                            }
+                        }
+
+                        val = AbsolutePosition;
                     }
                 }
 
@@ -524,6 +594,23 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        private void CrossAgentToNewRegionCompleted(IAsyncResult iar)
+        {
+            CrossAgentToNewRegionDelegate icon = (CrossAgentToNewRegionDelegate)iar.AsyncState;
+            ScenePresence agent = icon.EndInvoke(iar);
+
+            //// If the cross was successful, this agent is a child agent
+            //if (agent.IsChildAgent)
+            //    agent.Reset();
+            //else // Not successful
+            //    agent.RestoreInCurrentScene();
+
+            // In any case
+            agent.IsInTransit = false;
+
+            m_log.DebugFormat("[SCENE OBJECT]: Crossing agent {0} {1} completed.", agent.Firstname, agent.Lastname);
+        }
+
         public override uint LocalId
         {
             get { return m_rootPart.LocalId; }
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 13854c7..429fc06 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -233,6 +233,8 @@ namespace OpenSim.Region.Framework.Scenes
         private bool m_collisionEventFlag = false;
         private object m_collisionEventLock = new Object();
 
+        private Vector3 m_prevSitOffset;
+
         protected AvatarAppearance m_appearance;
 
         public AvatarAppearance Appearance
@@ -644,6 +646,13 @@ namespace OpenSim.Region.Framework.Scenes
         }
         private uint m_parentID;
 
+        public UUID ParentUUID
+        {
+            get { return m_parentUUID; }
+            set { m_parentUUID = value; }
+        }
+        private UUID m_parentUUID = UUID.Zero;
+
         public float Health
         {
             get { return m_health; }
@@ -865,7 +874,26 @@ namespace OpenSim.Region.Framework.Scenes
                 "[SCENE]: Upgrading child to root agent for {0} in {1}",
                 Name, m_scene.RegionInfo.RegionName);
 
-            //m_log.DebugFormat("[SCENE]: known regions in {0}: {1}", Scene.RegionInfo.RegionName, KnownChildRegionHandles.Count);
+            if (ParentUUID != UUID.Zero)
+            {
+                m_log.DebugFormat("[SCENE PRESENCE]: Sitting avatar back on prim {0}", ParentUUID);
+                SceneObjectPart part = m_scene.GetSceneObjectPart(ParentUUID);
+                if (part == null)
+                {
+                    m_log.ErrorFormat("[SCENE PRESENCE]: Can't find prim {0} to sit on", ParentUUID);
+                }
+                else
+                {
+                    part.ParentGroup.AddAvatar(UUID);
+                    if (part.SitTargetPosition != Vector3.Zero)
+                        part.SitTargetAvatar = UUID;
+                    ParentPosition = part.GetWorldPosition();
+                    ParentID = part.LocalId;
+                    m_pos = m_prevSitOffset;
+                    pos = ParentPosition;
+                }
+                ParentUUID = UUID.Zero;
+            }
 
             bool wasChild = IsChildAgent;
             IsChildAgent = false;
@@ -878,62 +906,64 @@ namespace OpenSim.Region.Framework.Scenes
 
             m_scene.EventManager.TriggerSetRootAgentScene(m_uuid, m_scene);
 
-            // Moved this from SendInitialData to ensure that Appearance is initialized
-            // before the inventory is processed in MakeRootAgent. This fixes a race condition
-            // related to the handling of attachments
-            //m_scene.GetAvatarAppearance(ControllingClient, out Appearance);
-            if (m_scene.TestBorderCross(pos, Cardinals.E))
+            if (ParentID == 0)
             {
-                Border crossedBorder = m_scene.GetCrossedBorder(pos, Cardinals.E);
-                pos.X = crossedBorder.BorderLine.Z - 1;
-            }
+                // Moved this from SendInitialData to ensure that Appearance is initialized
+                // before the inventory is processed in MakeRootAgent. This fixes a race condition
+                // related to the handling of attachments
+                //m_scene.GetAvatarAppearance(ControllingClient, out Appearance);
+                if (m_scene.TestBorderCross(pos, Cardinals.E))
+                {
+                    Border crossedBorder = m_scene.GetCrossedBorder(pos, Cardinals.E);
+                    pos.X = crossedBorder.BorderLine.Z - 1;
+                }
 
-            if (m_scene.TestBorderCross(pos, Cardinals.N))
-            {
-                Border crossedBorder = m_scene.GetCrossedBorder(pos, Cardinals.N);
-                pos.Y = crossedBorder.BorderLine.Z - 1;
-            }
+                if (m_scene.TestBorderCross(pos, Cardinals.N))
+                {
+                    Border crossedBorder = m_scene.GetCrossedBorder(pos, Cardinals.N);
+                    pos.Y = crossedBorder.BorderLine.Z - 1;
+                }
 
-            CheckAndAdjustLandingPoint(ref pos);
+                CheckAndAdjustLandingPoint(ref pos);
 
-            if (pos.X < 0f || pos.Y < 0f || pos.Z < 0f)
-            {
-                m_log.WarnFormat(
-                    "[SCENE PRESENCE]: MakeRootAgent() was given an illegal position of {0} for avatar {1}, {2}. Clamping",
-                    pos, Name, UUID);
+                if (pos.X < 0f || pos.Y < 0f || pos.Z < 0f)
+                {
+                    m_log.WarnFormat(
+                        "[SCENE PRESENCE]: MakeRootAgent() was given an illegal position of {0} for avatar {1}, {2}. Clamping",
+                        pos, Name, UUID);
 
-                if (pos.X < 0f) pos.X = 0f;
-                if (pos.Y < 0f) pos.Y = 0f;
-                if (pos.Z < 0f) pos.Z = 0f;
-            }
+                    if (pos.X < 0f) pos.X = 0f;
+                    if (pos.Y < 0f) pos.Y = 0f;
+                    if (pos.Z < 0f) pos.Z = 0f;
+                }
 
-            float localAVHeight = 1.56f;
-            if (Appearance.AvatarHeight > 0)
-                localAVHeight = Appearance.AvatarHeight;
+                float localAVHeight = 1.56f;
+                if (Appearance.AvatarHeight > 0)
+                    localAVHeight = Appearance.AvatarHeight;
 
-            float posZLimit = 0;
+                float posZLimit = 0;
 
-            if (pos.X < Constants.RegionSize && pos.Y < Constants.RegionSize)
-                posZLimit = (float)m_scene.Heightmap[(int)pos.X, (int)pos.Y];
-            
-            float newPosZ = posZLimit + localAVHeight / 2;
-            if (posZLimit >= (pos.Z - (localAVHeight / 2)) && !(Single.IsInfinity(newPosZ) || Single.IsNaN(newPosZ)))
-            {
-                pos.Z = newPosZ;
-            }
-            AbsolutePosition = pos;
+                if (pos.X < Constants.RegionSize && pos.Y < Constants.RegionSize)
+                    posZLimit = (float)m_scene.Heightmap[(int)pos.X, (int)pos.Y];
+                
+                float newPosZ = posZLimit + localAVHeight / 2;
+                if (posZLimit >= (pos.Z - (localAVHeight / 2)) && !(Single.IsInfinity(newPosZ) || Single.IsNaN(newPosZ)))
+                {
+                    pos.Z = newPosZ;
+                }
+                AbsolutePosition = pos;
 
-            AddToPhysicalScene(isFlying);
+                AddToPhysicalScene(isFlying);
 
-            if (ForceFly)
-            {
-                Flying = true;
-            }
-            else if (FlyDisabled)
-            {
-                Flying = false;
+                if (ForceFly)
+                {
+                    Flying = true;
+                }
+                else if (FlyDisabled)
+                {
+                    Flying = false;
+                }
             }
-
             // Don't send an animation pack here, since on a region crossing this will sometimes cause a flying 
             // avatar to return to the standing position in mid-air.  On login it looks like this is being sent
             // elsewhere anyway
@@ -951,11 +981,13 @@ namespace OpenSim.Region.Framework.Scenes
                 {
                     m_log.DebugFormat("[SCENE PRESENCE]: Restarting scripts in attachments...");
                     // Resume scripts
-                    foreach (SceneObjectGroup sog in m_attachments)
-                    {
-                        sog.RootPart.ParentGroup.CreateScriptInstances(0, false, m_scene.DefaultScriptEngine, GetStateSource());
-                        sog.ResumeScripts();
-                    }
+                    Util.FireAndForget(delegate(object x) {
+                        foreach (SceneObjectGroup sog in m_attachments)
+                        {
+                            sog.RootPart.ParentGroup.CreateScriptInstances(0, false, m_scene.DefaultScriptEngine, GetStateSource());
+                            sog.ResumeScripts();
+                        }
+                    });
                 }
             }
 
@@ -3109,6 +3141,9 @@ namespace OpenSim.Region.Framework.Scenes
             cAgent.AlwaysRun = SetAlwaysRun;
 
             cAgent.Appearance = new AvatarAppearance(Appearance);
+
+            cAgent.ParentPart = ParentUUID;
+            cAgent.SitOffset = m_pos;
             
             lock (scriptedcontrols)
             {
@@ -3168,6 +3203,8 @@ namespace OpenSim.Region.Framework.Scenes
             CameraAtAxis = cAgent.AtAxis;
             CameraLeftAxis = cAgent.LeftAxis;
             m_CameraUpAxis = cAgent.UpAxis;
+            ParentUUID = cAgent.ParentPart;
+            m_prevSitOffset = cAgent.SitOffset;
 
             // When we get to the point of re-computing neighbors everytime this
             // changes, then start using the agent's drawdistance rather than the