2 files changed, 6 insertions, 0 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 6d2ae5a..ef97dfc 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -1319,6 +1319,7 @@ namespace OpenSim.Region.Framework.Scenes
                     if (m_frame % m_update_presences == 0)
                         m_sceneGraph.UpdatePresences();
 
+                    // Coarse locations relate to positions of green dots on the mini-map (on a SecondLife client)
                     if (m_frame % m_update_coarse_locations == 0)
                     {
                         List<Vector3> coarseLocations;
@@ -1336,9 +1337,12 @@ namespace OpenSim.Region.Framework.Scenes
                         m_sceneGraph.UpdatePreparePhysics();
                     physicsMS2 = Util.EnvironmentTickCountSubtract(tmpPhysicsMS2);
 
+                    // Apply any pending avatar force input to the avatar's velocity
                     if (m_frame % m_update_entitymovement == 0)
                         m_sceneGraph.UpdateScenePresenceMovement();
 
+                    // Perform the main physics update.  This will do the actual work of moving objects and avatars according to their
+                    // velocity
                     int tmpPhysicsMS = Util.EnvironmentTickCount();
                     if (m_frame % m_update_physics == 0)
                     {
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 51a0f2a..a77f38c 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -1522,6 +1522,8 @@ namespace OpenSim.Region.Framework.Scenes
                     }
                 }
 
+                // If the agent update does move the avatar, then calculate the force ready for the velocity update,
+                // which occurs later in the main scene loop                
                 if (update_movementflag || (update_rotation && DCFlagKeyPressed))
                 {
                     //                    m_log.DebugFormat("{0} {1}", update_movementflag, (update_rotation && DCFlagKeyPressed));