Parameterizes the view distance used to compute and manage

child agents in neighbor regions. This means you can extend
the view on a simulator beyond the default 3x3 regions.

This uses a region default draw distance and should be
replaced at some point by the avatar specified draw distance.
That will require more careful, dynamic recomputation of child
agents every time the draw distance changes.

WARNING: this is experimental and has known instabilities. specifically
all regions "within site" should be running the same default draw distance
or agents will not be closed correctly.

1 files changed, 19 insertions, 5 deletions

diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 51b8dcc..9e9481e 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -626,7 +626,7 @@ namespace OpenSim.Region.Framework.Scenes
                 Utils.LongToUInts(handle, out x, out y);
                 x = x / Constants.RegionSize;
                 y = y / Constants.RegionSize;
-                if (Util.IsOutsideView(x, Scene.RegionInfo.RegionLocX, y, Scene.RegionInfo.RegionLocY))
+                if (Util.IsOutsideView(DrawDistance, x, Scene.RegionInfo.RegionLocX, y, Scene.RegionInfo.RegionLocY))
                 {
                     old.Add(handle);
                 }
@@ -700,6 +700,7 @@ namespace OpenSim.Region.Framework.Scenes
         
         private ScenePresence(IClientAPI client, Scene world, RegionInfo reginfo) : this()
         {
+            m_DrawDistance = world.DefaultDrawDistance;
             m_rootRegionHandle = reginfo.RegionHandle;
             m_controllingClient = client;
             m_firstname = m_controllingClient.FirstName;
@@ -1279,7 +1280,11 @@ namespace OpenSim.Region.Framework.Scenes
             m_CameraUpAxis = agentData.CameraUpAxis;
 
             // The Agent's Draw distance setting
-            m_DrawDistance = agentData.Far;
+            // When we get to the point of re-computing neighbors everytime this
+            // changes, then start using the agent's drawdistance rather than the 
+            // region's draw distance.
+            // m_DrawDistance = agentData.Far;
+            m_DrawDistance = Scene.DefaultDrawDistance;
 
             // Check if Client has camera in 'follow cam' or 'build' mode.
             Vector3 camdif = (Vector3.One * m_bodyRot - Vector3.One * CameraRotation);
@@ -2913,7 +2918,7 @@ namespace OpenSim.Region.Framework.Scenes
 
                         //m_log.Debug("---> x: " + x + "; newx:" + newRegionX + "; Abs:" + (int)Math.Abs((int)(x - newRegionX)));
                         //m_log.Debug("---> y: " + y + "; newy:" + newRegionY + "; Abs:" + (int)Math.Abs((int)(y - newRegionY)));
-                        if (Util.IsOutsideView(x, newRegionX, y, newRegionY))
+                        if (Util.IsOutsideView(DrawDistance, x, newRegionX, y, newRegionY))
                         {
                             byebyeRegions.Add(handle);
                         }
@@ -2989,7 +2994,12 @@ namespace OpenSim.Region.Framework.Scenes
 
             Vector3 offset = new Vector3(shiftx, shifty, 0f);
 
-            m_DrawDistance = cAgentData.Far;
+            // When we get to the point of re-computing neighbors everytime this
+            // changes, then start using the agent's drawdistance rather than the 
+            // region's draw distance.
+            // m_DrawDistance = cAgentData.Far;
+            m_DrawDistance = Scene.DefaultDrawDistance;
+            
             if (cAgentData.Position != new Vector3(-1f, -1f, -1f)) // UGH!!
                 m_pos = cAgentData.Position + offset;
 
@@ -3139,7 +3149,11 @@ namespace OpenSim.Region.Framework.Scenes
             m_CameraLeftAxis = cAgent.LeftAxis;
             m_CameraUpAxis = cAgent.UpAxis;
 
-            m_DrawDistance = cAgent.Far;
+            // When we get to the point of re-computing neighbors everytime this
+            // changes, then start using the agent's drawdistance rather than the 
+            // region's draw distance.
+            // m_DrawDistance = cAgent.Far;
+            m_DrawDistance = Scene.DefaultDrawDistance;
 
             if ((cAgent.Throttles != null) && cAgent.Throttles.Length > 0)
                 ControllingClient.SetChildAgentThrottle(cAgent.Throttles);