Fixes some problems with objects that attempt to cross a region boundary

into a region that does not exist. This is particularly problematic for
physical objects where the velocity continues to move them out of the
region causing an infinite number of failed region crossings. The patch
forces an object that fails a crossing to be non-physical and moves it
back into the starting region.

1 files changed, 24 insertions, 0 deletions

diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index b9d5d32..098e5cb 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -1705,6 +1705,30 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             uint x = 0, y = 0;
             Utils.LongToUInts(newRegionHandle, out x, out y);
             GridRegion destination = scene.GridService.GetRegionByPosition(scene.RegionInfo.ScopeID, (int)x, (int)y);
+
+            if (destination == null || !CrossPrimGroupIntoNewRegion(destination, grp, silent))
+            {
+                m_log.InfoFormat("[ENTITY TRANSFER MODULE] cross region transfer failed for object {0}",grp.UUID);
+
+                // We are going to move the object back to the old position so long as the old position
+                // is in the region
+                oldGroupPosition.X = Util.Clamp<float>(oldGroupPosition.X,1.0f,(float)Constants.RegionSize-1);
+                oldGroupPosition.Y = Util.Clamp<float>(oldGroupPosition.Y,1.0f,(float)Constants.RegionSize-1);
+                oldGroupPosition.Z = Util.Clamp<float>(oldGroupPosition.Z,1.0f,4096.0f);
+
+                grp.RootPart.GroupPosition = oldGroupPosition;
+
+                // Need to turn off the physics flags, otherwise the object will continue to attempt to
+                // move out of the region creating an infinite loop of failed attempts to cross
+                grp.UpdatePrimFlags(grp.RootPart.LocalId,false,grp.IsTemporary,grp.IsPhantom,false);
+
+                grp.ScheduleGroupForFullUpdate();
+            }
+
+
+
+
+
             if (destination != null && !CrossPrimGroupIntoNewRegion(destination, grp, silent))
             {
                 grp.RootPart.GroupPosition = oldGroupPosition;