From 6779f41e217ac2d401c3adf319ff307c46bc4dd3 Mon Sep 17 00:00:00 2001
From: UbitUmarov
Date: Sat, 24 Sep 2016 22:21:51 +0100
Subject: fix linknumbers when unlink the root prim

---
 .../Region/Framework/Scenes/SceneObjectGroup.cs    | 111 ++++++++++++++++++++-
 1 file changed, 108 insertions(+), 3 deletions(-)

(limited to 'OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs')

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>
-- 
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