From b114a04ed4f06afbdf673c28374e6e3cb9065096 Mon Sep 17 00:00:00 2001
From: UbitUmarov
Date: Sat, 29 Aug 2015 03:41:43 +0100
Subject:  fix NeighborRegions code

---
 .../EntityTransfer/EntityTransferModule.cs         | 11 ++--
 OpenSim/Region/Framework/Scenes/Scene.cs           | 65 ++++++----------------
 2 files changed, 21 insertions(+), 55 deletions(-)

(limited to 'OpenSim/Region')

diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index e3cf43c..7861a54 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -1147,7 +1147,6 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             // Past this point we have to attempt clean up if the teleport fails, so update transfer state.
             m_entityTransferStateMachine.UpdateInTransit(sp.UUID, AgentTransferState.Transferring);
 
-
             // We need to set this here to avoid an unlikely race condition when teleporting to a neighbour simulator,
             // where that neighbour simulator could otherwise request a child agent create on the source which then 
             // closes our existing agent which is still signalled as root.
@@ -2184,7 +2183,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             int shifty = (rRegionY - tRegionY) * (int)Constants.RegionSize;
             return new Vector3(shiftx, shifty, 0f);
              */
-            return new Vector3( sp.Scene.RegionInfo.WorldLocX - neighbour.RegionLocX,
+            return new Vector3(sp.Scene.RegionInfo.WorldLocX - neighbour.RegionLocX,
                                 sp.Scene.RegionInfo.WorldLocY - neighbour.RegionLocY,
                                 0f);
         }
@@ -2496,10 +2495,10 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 uint startY = Util.RegionToWorldLoc(pRegionLocY) + m_regionInfo.RegionSizeY / 2;
                 uint endY = startY;
 
-                startX -= dd;
-                startY -= dd;
-                endX += dd;
-                endY += dd;
+                startX -= ddX;
+                startY -= ddY;
+                endX += ddX;
+                endY += ddY;
 
                 neighbours
                     = avatar.Scene.GridService.GetRegionRange(
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 41f8871..605c788 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -1129,17 +1129,9 @@ namespace OpenSim.Region.Framework.Scenes
         /// <returns>True after all operations complete, throws exceptions otherwise.</returns>
         public override void OtherRegionUp(GridRegion otherRegion)
         {
-            uint xcell = (uint)((int)otherRegion.RegionLocX / (int)Constants.RegionSize);
-            uint ycell = (uint)((int)otherRegion.RegionLocY / (int)Constants.RegionSize);
-            //m_log.InfoFormat("[SCENE]: (on region {0}): Region {1} up in coords {2}-{3}", 
-            //    RegionInfo.RegionName, otherRegion.RegionName, xcell, ycell);
-
             if (RegionInfo.RegionHandle != otherRegion.RegionHandle)
             {
-                // If these are cast to INT because long + negative values + abs returns invalid data
-                int resultX = Math.Abs((int)xcell - (int)RegionInfo.RegionLocX);
-                int resultY = Math.Abs((int)ycell - (int)RegionInfo.RegionLocY);
-                if (resultX <= 1 && resultY <= 1)
+                if (isNeighborRegion(otherRegion))
                 {
                     // Let the grid service module know, so this can be cached
                     m_eventManager.TriggerOnRegionUp(otherRegion);
@@ -1174,6 +1166,21 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        public bool isNeighborRegion(GridRegion otherRegion)
+        {
+            int tmp = otherRegion.RegionLocX - (int)RegionInfo.WorldLocX; ;
+
+            if (tmp < -otherRegion.RegionSizeX && tmp > RegionInfo.RegionSizeX)
+                return false;
+
+            tmp = otherRegion.RegionLocY - (int)RegionInfo.WorldLocY;
+
+            if (tmp < -otherRegion.RegionSizeY && tmp > RegionInfo.RegionSizeY)
+                return false;
+
+            return true;
+        }
+
         public void AddNeighborRegion(RegionInfo region)
         {
             lock (m_neighbours)
@@ -1202,46 +1209,6 @@ namespace OpenSim.Region.Framework.Scenes
             return found;
         }
 
-        /// <summary>
-        /// Checks whether this region has a neighbour in the given direction.
-        /// </summary>
-        /// <param name="car"></param>
-        /// <param name="fix"></param>
-        /// <returns>
-        /// An integer which represents a compass point.  N == 1, going clockwise until we reach NW == 8.
-        /// Returns a positive integer if there is a region in that direction, a negative integer if not.
-        /// </returns>
-        public int HaveNeighbor(Cardinals car, ref int[] fix)
-        {
-            uint neighbourx = RegionInfo.RegionLocX;
-            uint neighboury = RegionInfo.RegionLocY;
-
-            int dir = (int)car;
-
-            if (dir > 1 && dir < 5) //Heading East
-                neighbourx++;
-            else if (dir > 5) // Heading West
-                neighbourx--;
-
-            if (dir < 3 || dir == 8) // Heading North
-                neighboury++;
-            else if (dir > 3 && dir < 7) // Heading Sout
-                neighboury--;
-
-            int x = (int)(neighbourx * Constants.RegionSize);
-            int y = (int)(neighboury * Constants.RegionSize);
-            GridRegion neighbourRegion = GridService.GetRegionByPosition(RegionInfo.ScopeID, x, y);
-
-            if (neighbourRegion == null)
-            {
-                fix[0] = (int)(RegionInfo.RegionLocX - neighbourx);
-                fix[1] = (int)(RegionInfo.RegionLocY - neighboury);
-                return dir * (-1);
-            }
-            else
-                return dir;
-        }
-
         // Alias IncomingHelloNeighbour OtherRegionUp, for now
         public GridRegion IncomingHelloNeighbour(RegionInfo neighbour)
         {
-- 
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