From ca2abc43ad440a99f17b43d32de89e77fdeef00e Mon Sep 17 00:00:00 2001
From: Dan Lake
Date: Tue, 8 Jun 2010 16:30:51 -0700
Subject: Refactor SendCoarseLocations for better performance. Instead of
 computing list of all locations fresh for every scene presence on every
 frame, we will instead compute the list once every 50 frames and send to all
 connected presences at that time. Also, we only add 60 items to the list when
 there are more than 60 presences in the scene. For 1000 users, this change
 yields a 99.8% reduction in list processing and a 98% reduction in network
 bandwidth for coarse locations.

---
 OpenSim/Region/Framework/Scenes/SceneGraph.cs | 37 +++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

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

diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 5902080..673674d 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -206,6 +206,43 @@ namespace OpenSim.Region.Framework.Scenes
             });
         }
 
+        public void GetCoarseLocations(out List<Vector3> coarseLocations, out List<UUID> avatarUUIDs, uint maxLocations)
+        {
+            coarseLocations = new List<Vector3>();
+            avatarUUIDs = new List<UUID>();
+
+            List<ScenePresence> presences = GetScenePresences();
+            for (int i = 0; i < Math.Min(presences.Count, maxLocations); ++i)
+            {
+                ScenePresence sp = presences[i];
+                // If this presence is a child agent, we don't want its coarse locations
+                if (sp.IsChildAgent)
+                    return;
+
+                if (sp.ParentID != 0)
+                {
+                    // sitting avatar
+                    SceneObjectPart sop = m_parentScene.GetSceneObjectPart(sp.ParentID);
+                    if (sop != null)
+                    {
+                        coarseLocations.Add(sop.AbsolutePosition + sp.AbsolutePosition);
+                        avatarUUIDs.Add(sp.UUID);
+                    }
+                    else
+                    {
+                        // we can't find the parent..  ! arg!
+                        coarseLocations.Add(sp.AbsolutePosition);
+                        avatarUUIDs.Add(sp.UUID);
+                    }
+                }
+                else
+                {
+                    coarseLocations.Add(sp.AbsolutePosition);
+                    avatarUUIDs.Add(sp.UUID);
+                }
+            }
+        }
+
         #endregion
 
         #region Entity Methods
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