Implement cmGetAvatarList(). This returns a strided list of all avatars in the region, including their UUID, position and name. The radar is often the most taxing scripts on a sim, this function can help radars reduce their impact by 66% by eliminating the need for sensors.

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/CM_Api.cs

@@ -85,6 +85,28 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             wComm.DeliverMessage(ChatTypeEnum.Shout, ScriptBaseClass.DEBUG_CHANNEL, m_host.Name, m_host.UUID, message);
         }
 
+        /// <summary>
+        /// Like osGetAgents but returns enough info for a radar
+        /// </summary>
+        /// <returns>Strided list of the UUID, position and name of each avatar in the region</returns>
+        public LSL_List cmGetAvatarList()
+        {
+            LSL_List result = new LSL_List();
+            foreach (ScenePresence avatar in World.GetAvatars())
+            {
+                if (avatar.UUID != m_host.OwnerID)
+                {
+                    if (avatar.IsChildAgent == false)
+                    {
+                        result.Add(avatar.UUID);
+                        result.Add(avatar.PhysicsActor.Position);
+                        result.Add(avatar.Name);
+                    }
+                }
+            }
+            return result;
+        }
+
         /// <summary>
         /// Get the current Windlight scene
         /// </summary>

OpenSim/Region/ScriptEngine/Shared/Api/Interface/ICM_Api.cs

@@ -17,5 +17,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
         LSL_List cmGetWindlightScene(LSL_List rules);
         int cmSetWindlightScene(LSL_List rules);
         int cmSetWindlightSceneTargeted(LSL_List rules, key target);
+        LSL_List cmGetAvatarList();
     }
 }

OpenSim/Region/ScriptEngine/Shared/Api/Runtime/CM_Stub.cs

@@ -72,5 +72,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
         {
             return m_CM_Functions.cmSetWindlightSceneTargeted(rules, target);
         }
+        public LSL_List cmGetAvatarList()
+        {
+            return m_CM_Functions.cmGetAvatarList();
+        }
     }
 }