Update avatar-position while avatar is sitting and the prim is moved (#2159).

I decided to make ParentPosition a public property in ScenePresence, because
that's exactly what happens (the parent position changes on prim move).

1 files changed, 11 insertions, 0 deletions

diff --git a/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs b/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs
index 2b0ad12..b4b9f00 100644
--- a/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs
@@ -498,6 +498,17 @@ namespace OpenSim.Region.Environment.Scenes
                         Console.WriteLine(e.Message);
                     }
                 }
+                
+                // TODO if we decide to do sitting in a more SL compatible way (multiple avatars per prim), this has to be fixed, too
+                if(m_sitTargetAvatar != UUID.Zero) {
+                    if (m_parentGroup != null) // TODO can there be a SOP without a SOG?
+                    {
+                        ScenePresence avatar;
+                        if(m_parentGroup.Scene.TryGetAvatar(m_sitTargetAvatar, out avatar)) {
+                            avatar.ParentPosition = GetWorldPosition();
+                        }
+                    }
+                }
 
             }
         }