fix linknumbers when unlink the root prim

2 files changed, 157 insertions, 70 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 8fc807a..238ec8e 100755
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -1913,31 +1913,36 @@ namespace OpenSim.Region.Framework.Scenes
                 //
                 foreach (SceneObjectPart part in prims)
                 {
-                    if (part != null)
+                    if(part == null)
+                        continue;
+                    SceneObjectGroup parentSOG = part.ParentGroup;
+                    if(parentSOG == null ||
+                        parentSOG.IsDeleted ||
+                        parentSOG.inTransit ||
+                        parentSOG.PrimCount == 1)
+                        continue;
+
+                    if (!affectedGroups.Contains(parentSOG))
                     {
-                        if (part.KeyframeMotion != null)
-                        {
-                            part.KeyframeMotion.Stop();
-                            part.KeyframeMotion = null;
-                        }
-                        if (part.ParentGroup.PrimCount != 1) // Skip single
-                        {
-                            if (part.LinkNum < 2) // Root
-                            {
-                                rootParts.Add(part);
-                            }
-                            else
-                            {
-                                part.LastOwnerID = part.ParentGroup.RootPart.LastOwnerID;
-                                childParts.Add(part);
-                            }
+                        affectedGroups.Add(parentSOG);
+                        if(parentSOG.RootPart.PhysActor != null)
+                            parentSOG.RootPart.PhysActor.Building = true;
+                    }
 
-                            SceneObjectGroup group = part.ParentGroup;
-                            if (!affectedGroups.Contains(group))
-                            {
-                                affectedGroups.Add(group);
-                            }
-                        }
+                    if (part.KeyframeMotion != null)
+                    {
+                        part.KeyframeMotion.Stop();
+                        part.KeyframeMotion = null;
+                    }
+
+                    if (part.LinkNum < 2) // Root
+                    {
+                        rootParts.Add(part);
+                    }
+                    else
+                    {
+                        part.LastOwnerID = part.ParentGroup.RootPart.LastOwnerID;
+                        childParts.Add(part);
                     }
                 }
 
@@ -1946,8 +1951,8 @@ namespace OpenSim.Region.Framework.Scenes
                     foreach (SceneObjectPart child in childParts)
                     {
                         // Unlink all child parts from their groups
-                        //
                         child.ParentGroup.DelinkFromGroup(child, true);
+                        //child.ParentGroup is now other
                         child.ParentGroup.HasGroupChanged = true;
                         child.ParentGroup.ScheduleGroupForFullUpdate();
                     }
@@ -1960,74 +1965,51 @@ namespace OpenSim.Region.Framework.Scenes
                     // However, editing linked parts and unlinking may be different
                     //
                     SceneObjectGroup group = root.ParentGroup;
-                    
+                   
                     List<SceneObjectPart> newSet = new List<SceneObjectPart>(group.Parts);
-                    int numChildren = newSet.Count;
 
-                    if (numChildren == 1)
+                    newSet.Remove(root);
+                    int numChildren = newSet.Count;
+                    if(numChildren == 0)
                         break;
 
-                    // If there are prims left in a link set, but the root is
-                    // slated for unlink, we need to do this
-                    // Unlink the remaining set
-                    //
-                    bool sendEventsToRemainder = false;
-                    if (numChildren == 2) // only one child prim no re-link needed
-                        sendEventsToRemainder = true;
-
                     foreach (SceneObjectPart p in newSet)
-                    {
-                        if (p != group.RootPart)
-                        {
-                            group.DelinkFromGroup(p, sendEventsToRemainder);
-                            if (sendEventsToRemainder) // finish single child prim now
-                            {                              
-                                p.ParentGroup.HasGroupChanged = true;
-                                p.ParentGroup.ScheduleGroupForFullUpdate();
-                            }
-                        }
-                    }
+                        group.DelinkFromGroup(p, false);
 
+                    SceneObjectPart newRoot = newSet[0];
+                    
                     // If there is more than one prim remaining, we
                     // need to re-link
                     //
-                    if (numChildren > 2)
+                    if (numChildren > 1)
                     {
-                        // Remove old root
-                        //
-                        if (newSet.Contains(root))
-                            newSet.Remove(root);
-
-                        // Preserve link ordering
-                        //
-                        newSet.Sort(delegate (SceneObjectPart a, SceneObjectPart b)
-                        {
-                            return a.LinkNum.CompareTo(b.LinkNum);
-                        });
-
                         // Determine new root
                         //
-                        SceneObjectPart newRoot = newSet[0];
                         newSet.RemoveAt(0);
-
-                            foreach (SceneObjectPart newChild in newSet)
-                                newChild.ClearUpdateSchedule();
+                        foreach (SceneObjectPart newChild in newSet)
+                            newChild.ClearUpdateSchedule();
 
                         LinkObjects(newRoot, newSet);
-//                        if (!affectedGroups.Contains(newRoot.ParentGroup))
-//                            affectedGroups.Add(newRoot.ParentGroup);
+                    }
+                    else
+                    {
+                        newRoot.TriggerScriptChangedEvent(Changed.LINK);
+                        newRoot.ParentGroup.HasGroupChanged = true;
+                        newRoot.ParentGroup.ScheduleGroupForFullUpdate();                   
                     }
                 }
 
-                // Finally, trigger events in the roots
+                // trigger events in the roots
                 //
                 foreach (SceneObjectGroup g in affectedGroups)
                 {
+                    if(g.RootPart.PhysActor != null)
+                        g.RootPart.PhysActor.Building = false;
+                    g.AdjustChildPrimPermissions(false);
                     // Child prims that have been unlinked and deleted will
                     // return unless the root is deleted. This will remove them
                     // from the database. They will be rewritten immediately,
                     // minus the rows for the unlinked child prims.
-                    g.AdjustChildPrimPermissions(false);
                     m_parentScene.SimulationDataService.RemoveObject(g.UUID, m_parentScene.RegionInfo.RegionID);
                     g.TriggerScriptChangedEvent(Changed.LINK);
                     g.HasGroupChanged = true; // Persist
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 17dfb85..53a9441 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -3168,10 +3168,11 @@ namespace OpenSim.Region.Framework.Scenes
                 if (insert)
                 {
                     linkNum = 2;
+                    int insertSize = objectGroup.PrimCount;
                     foreach (SceneObjectPart part in Parts)
                     {
                         if (part.LinkNum > 1)
-                            part.LinkNum++;
+                            part.LinkNum += insertSize;
                     }
                 }
                 else
@@ -3200,14 +3201,14 @@ namespace OpenSim.Region.Framework.Scenes
                 linkPart.LinkNum = linkNum++;
                 linkPart.UpdatePrimFlags(UsesPhysics, IsTemporary, IsPhantom, IsVolumeDetect, false);
 
-                // Get a list of the SOP's in the old group in order of their linknum's.
+                // Get a list of the SOP's in the source group in order of their linknum's.
                 SceneObjectPart[] ogParts = objectGroup.Parts;
                 Array.Sort(ogParts, delegate(SceneObjectPart a, SceneObjectPart b)
                         {
                             return a.LinkNum - b.LinkNum;
                         });
 
-                // Add each of the SOP's from the old linkset to our linkset
+                // Add each of the SOP's from the source linkset to our linkset
                 for (int i = 0; i < ogParts.Length; i++)
                 {
                     SceneObjectPart part = ogParts[i];
@@ -3415,6 +3416,110 @@ namespace OpenSim.Region.Framework.Scenes
             return objectGroup;
         }
 
+/* working on it
+        public void DelinkFromGroup(List<SceneObjectPart> linkParts, bool sendEvents)
+        {
+//                m_log.DebugFormat(
+//                    "[SCENE OBJECT GROUP]: Delinking part {0}, {1} from group with root part {2}, {3}",
+//                    linkPart.Name, linkPart.UUID, RootPart.Name, RootPart.UUID);
+
+            if(PrimCount == 1)
+                return;
+
+            if (m_rootPart.PhysActor != null)
+                m_rootPart.PhysActor.Building = true;
+
+            bool unlinkroot = false;
+            foreach(SceneObjectPart linkPart in linkParts)
+            {
+                // first we only remove child parts
+                if(linkPart.LocalId == m_rootPart.LocalId)
+                {
+                    unlinkroot = true;
+                    continue;
+                }
+
+                lock (m_parts.SyncRoot)
+                    if(!m_parts.Remove(linkPart.UUID))
+                        continue;
+                
+                linkPart.ClearUndoState();
+
+                Vector3 worldPos = linkPart.GetWorldPosition();
+                Quaternion worldRot = linkPart.GetWorldRotation();
+
+                linkPart.ParentID = 0;
+                linkPart.LinkNum = 0;
+
+                PhysicsActor linkPartPa = linkPart.PhysActor;
+
+                // Remove the SOP from the physical scene.
+                // If the new SOG is physical, it is re-created later.
+                // (There is a problem here in that we have not yet told the physics
+                //    engine about the delink. Someday, linksets should be made first
+                //    class objects in the physics engine interface).
+                if (linkPartPa != null)
+                {
+                    m_scene.PhysicsScene.RemovePrim(linkPartPa);
+                    linkPart.PhysActor = null;
+                }
+
+                linkPart.setGroupPosition(worldPos);
+                linkPart.setOffsetPosition(Vector3.Zero);
+                linkPart.setRotationOffset(worldRot);
+
+                // Create a new SOG to go around this unlinked and unattached SOP
+                SceneObjectGroup objectGroup = new SceneObjectGroup(linkPart);
+
+                m_scene.AddNewSceneObject(objectGroup, true);
+
+                linkPart.Rezzed = RootPart.Rezzed;
+
+                // this is as it seems to be in sl now
+                if(linkPart.PhysicsShapeType == (byte)PhysShapeType.none)
+                    linkPart.PhysicsShapeType = linkPart.DefaultPhysicsShapeType(); // root prims can't have type none for now
+
+                objectGroup.HasGroupChangedDueToDelink = true;
+                if (sendEvents)
+                   linkPart.TriggerScriptChangedEvent(Changed.LINK);
+            }
+
+            if(unlinkroot)
+            {
+                //TODO
+            }
+
+            lock (m_parts.SyncRoot)
+            {
+                SceneObjectPart[] parts = m_parts.GetArray();
+                if (parts.Length == 1)
+                {
+                    // Single prim left
+                    m_rootPart.LinkNum = 0;
+                }
+                else
+                {
+                    m_rootPart.LinkNum = 1;
+                    int linknum = 2;
+                    for (int i = 1; i < parts.Length; i++)
+                        parts[i].LinkNum = linknum++;
+                }
+            }
+
+            InvalidBoundsRadius();
+
+            if (m_rootPart.PhysActor != null)
+                m_rootPart.PhysActor.Building = false;
+
+            // When we delete a group, we currently have to force persist to the database if the object id has changed
+            // (since delete works by deleting all rows which have a given object id)
+
+            Scene.SimulationDataService.RemoveObject(UUID, Scene.RegionInfo.RegionID);
+            HasGroupChangedDueToDelink = true;
+            TriggerScriptChangedEvent(Changed.LINK);
+            return;
+        }
+*/
         /// <summary>
         /// Stop this object from being persisted over server restarts.
         /// </summary>