1 files changed, 35 insertions, 6 deletions

diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 553b575..079223d 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -253,6 +253,16 @@ namespace OpenSim.Region.Framework.Scenes
         private Dictionary<ulong, string> m_knownChildRegions = new Dictionary<ulong, string>();
 
         /// <summary>
+        /// Copy of the script states while the agent is in transit. This state may
+        /// need to be placed back in case of transfer fail.
+        /// </summary>
+        public List<string> InTransitScriptStates
+        {
+            get { return m_InTransitScriptStates; }
+        }
+        private List<string> m_InTransitScriptStates = new List<string>();
+
+        /// <summary>
         /// Implemented Control Flags
         /// </summary>
         private enum Dir_ControlFlags
@@ -2812,6 +2822,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         // vars to support reduced update frequency when velocity is unchanged
         private Vector3 lastVelocitySentToAllClients = Vector3.Zero;
+        private Vector3 lastPositionSentToAllClients = Vector3.Zero;
         private int lastTerseUpdateToAllClientsTick = Util.EnvironmentTickCount();
 
         /// <summary>
@@ -2821,14 +2832,29 @@ namespace OpenSim.Region.Framework.Scenes
         {
             int currentTick = Util.EnvironmentTickCount();
 
-            // decrease update frequency when avatar is moving but velocity is not changing
-            if (m_velocity.Length() < 0.01f
-                || Vector3.Distance(lastVelocitySentToAllClients, m_velocity) > 0.01f
-                || currentTick - lastTerseUpdateToAllClientsTick > 1500)
+            // Decrease update frequency when avatar is moving but velocity is
+            // not changing.
+            // If there is a mismatch between distance travelled and expected
+            // distance based on last velocity sent and velocity hasnt changed,
+            // then send a new terse update
+
+            float timeSinceLastUpdate = (currentTick - lastTerseUpdateToAllClientsTick) * 0.001f;
+
+            Vector3 expectedPosition = lastPositionSentToAllClients + lastVelocitySentToAllClients * timeSinceLastUpdate;
+
+            float distanceError = Vector3.Distance(OffsetPosition, expectedPosition);
+
+            float speed = Velocity.Length();
+            float velocidyDiff = Vector3.Distance(lastVelocitySentToAllClients, Velocity);
+
+            if (speed < 0.01f // allow rotation updates if avatar position is unchanged
+                || Math.Abs(distanceError) > 0.25f // arbitrary distance error threshold
+                || velocidyDiff > 0.01f) // did velocity change from last update?
             {
                 m_perfMonMS = currentTick;
-                lastVelocitySentToAllClients = m_velocity;
+                lastVelocitySentToAllClients = Velocity;
                 lastTerseUpdateToAllClientsTick = currentTick;
+                lastPositionSentToAllClients = OffsetPosition;
 
                 m_scene.ForEachClient(SendTerseUpdateToClient);
 
@@ -3543,6 +3569,7 @@ namespace OpenSim.Region.Framework.Scenes
                 cAgent.AttachmentObjects = new List<ISceneObject>();
                 cAgent.AttachmentObjectStates = new List<string>();
                 IScriptModule se = m_scene.RequestModuleInterface<IScriptModule>();
+                m_InTransitScriptStates.Clear();
                 foreach (SceneObjectGroup sog in m_attachments)
                 {
                     // We need to make a copy and pass that copy
@@ -3552,7 +3579,9 @@ namespace OpenSim.Region.Framework.Scenes
                     ((SceneObjectGroup)clone).RootPart.GroupPosition = sog.RootPart.AttachedPos;
                     ((SceneObjectGroup)clone).RootPart.IsAttachment = false;
                     cAgent.AttachmentObjects.Add(clone);
-                    cAgent.AttachmentObjectStates.Add(sog.GetStateSnapshot());
+                    string state = sog.GetStateSnapshot();
+                    cAgent.AttachmentObjectStates.Add(state);
+                    m_InTransitScriptStates.Add(state);
                     // Let's remove the scripts of the original object here
                     sog.RemoveScriptInstances(true);
                 }