From 6f542f73d4aacc0b92c2ebcff84b4ce2c8d9433b Mon Sep 17 00:00:00 2001
From: Justin Clark-Casey (justincc)
Date: Fri, 16 Sep 2011 23:57:16 +0100
Subject: Stop the avatar stalling on its first boarder cross when using the
 ODE plugin

When upgrading the previously child agent to a root, the code was setting the Size parameter on the ODECharacter PhysicsActor.
This in turn reset Velocity, which cause the border stall.
I'm fixing this by commenting out the Velocity = Vector3.Zero lines since they don't appear to play a useful purpose
---
 OpenSim/Region/Framework/Scenes/ScenePresence.cs | 10 ++++++++++
 OpenSim/Region/Physics/OdePlugin/ODECharacter.cs | 19 +++++++++++++------
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 81475b8..0fc85b9 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -469,6 +469,10 @@ namespace OpenSim.Region.Framework.Scenes
                 if (actor != null)
                 {
                     m_pos = actor.Position;
+
+//                    m_log.DebugFormat(
+//                        "[SCENE PRESENCE]: Set position {0} for {1} in {2} via getting AbsolutePosition!",
+//                        m_pos, Name, Scene.RegionInfo.RegionName);
                 }
                 else
                 {
@@ -544,8 +548,14 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 PhysicsActor actor = m_physicsActor;
                 if (actor != null)
+                {
                     m_velocity = actor.Velocity;
 
+//                    m_log.DebugFormat(
+//                        "[SCENE PRESENCE]: Set velocity {0} for {1} in {2} via getting Velocity!",
+//                        m_velocity, Name, Scene.RegionInfo.RegionName);
+                }
+
                 return m_velocity;
             }
             set
diff --git a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
index 0a0d13f..4cc8c59 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
@@ -464,10 +464,12 @@ namespace OpenSim.Region.Physics.OdePlugin
                     m_pidControllerActive = true;
 
                     Vector3 SetSize = value;
-                    m_tainted_CAPSULE_LENGTH = (SetSize.Z*1.15f) - CAPSULE_RADIUS*2.0f;
-                    //m_log.Info("[SIZE]: " + CAPSULE_LENGTH.ToString());
+                    m_tainted_CAPSULE_LENGTH = (SetSize.Z * 1.15f) - CAPSULE_RADIUS * 2.0f;
+//                    m_log.Info("[SIZE]: " + CAPSULE_LENGTH);
 
-                    Velocity = Vector3.Zero;
+                    // If we reset velocity here, then an avatar stalls when it crosses a border for the first time
+                    // (as the height of the new root agent is set).
+//                    Velocity = Vector3.Zero;
 
                     _parent_scene.AddPhysicsActorTaint(this);
                 }
@@ -785,6 +787,8 @@ namespace OpenSim.Region.Physics.OdePlugin
                 {
                     m_log.Warn("[PHYSICS]: Got a NaN velocity from Scene in a Character");
                 }
+
+//                m_log.DebugFormat("[PHYSICS]: Set target velocity of {0}", _target_velocity);
             }
         }
 
@@ -1325,7 +1329,8 @@ namespace OpenSim.Region.Physics.OdePlugin
             {
                 if (Shell != IntPtr.Zero && Body != IntPtr.Zero && Amotor != IntPtr.Zero)
                 {
-
+//                    m_log.DebugFormat("[PHYSICS]: Changing capsule size");
+                    
                     m_pidControllerActive = true;
                     // no lock needed on _parent_scene.OdeLock because we are called from within the thread lock in OdePlugin's simulate()
                     d.JointDestroy(Amotor);
@@ -1336,7 +1341,10 @@ namespace OpenSim.Region.Physics.OdePlugin
                     d.GeomDestroy(Shell);
                     AvatarGeomAndBodyCreation(_position.X, _position.Y,
                                       _position.Z + (Math.Abs(CAPSULE_LENGTH - prevCapsule) * 2), m_tensor);
-                    Velocity = Vector3.Zero;
+
+                    // As with Size, we reset velocity.  However, this isn't strictly necessary since it doesn't
+                    // appear to stall initial region crossings when done here.  Being done for consistency.
+//                    Velocity = Vector3.Zero;
 
                     _parent_scene.geom_name_map[Shell] = m_name;
                     _parent_scene.actor_name_map[Shell] = (PhysicsActor)this;
@@ -1361,7 +1369,6 @@ namespace OpenSim.Region.Physics.OdePlugin
                     _position.Z = m_taintPosition.Z;
                 }
             }
-
         }
 
         internal void AddCollisionFrameTime(int p)
-- 
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