Fix issue where sitting on non-root linked prims would send camera to wrong position in third-person and mouselook

We now specify sits as offsets from the root prim, as the viewer expects.

2 files changed, 14 insertions, 3 deletions

diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index 20bc59c..29751ff 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -5218,7 +5218,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             update.NameValue = Utils.StringToBytes("FirstName STRING RW SV " + data.Firstname + "\nLastName STRING RW SV " +
                 data.Lastname + "\nTitle STRING RW SV " + data.Grouptitle);
             update.ObjectData = objectData;
-            update.ParentID = data.ParentID;
+
+            SceneObjectPart parentPart = data.ParentPart;
+            if (parentPart != null)
+                update.ParentID = parentPart.ParentGroup.LocalId;
+            else
+                update.ParentID = 0;
+
             update.PathCurve = 16;
             update.PathScaleX = 100;
             update.PathScaleY = 100;
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 7243db1..ea8e4fe 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -2312,8 +2312,10 @@ namespace OpenSim.Region.Framework.Scenes
                 cameraEyeOffset = part.GetCameraEyeOffset();
                 forceMouselook = part.GetForceMouselook();
 
+                // An viewer expects to specify sit positions as offsets to the root prim, even if a child prim is
+                // being sat upon.
                 ControllingClient.SendSitResponse(
-                    part.UUID, offset, sitOrientation, false, cameraAtOffset, cameraEyeOffset, forceMouselook);
+                    part.ParentGroup.UUID, offset, sitOrientation, false, cameraAtOffset, cameraEyeOffset, forceMouselook);
 
                 m_requestedSitTargetUUID = part.UUID;
 
@@ -2592,7 +2594,10 @@ namespace OpenSim.Region.Framework.Scenes
                 }
                 else
                 {
-                    m_pos -= part.AbsolutePosition;
+                    // An viewer expects to specify sit positions as offsets to the root prim, even if a child prim is
+                    // being sat upon.
+                    m_pos -= part.GroupPosition;
+
                     ParentPosition = part.AbsolutePosition;
 
 //                        m_log.DebugFormat(