3 files changed, 39 insertions, 8 deletions

diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index a4887ad..024ebce 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -4744,6 +4744,12 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 position = presence.OffsetPosition;
                 velocity = presence.Velocity;
                 acceleration = Vector3.Zero;
+
+                // Interestingly, sending this to non-zero will cause the client's avatar to start moving & accelerating
+                // in that direction, even though we don't model this on the server.  Implementing this in the future
+                // may improve movement smoothness.
+//                acceleration = new Vector3(1, 0, 0);
+                
                 angularVelocity = Vector3.Zero;
                 rotation = presence.Rotation;
 
diff --git a/OpenSim/Region/Physics/Manager/PhysicsActor.cs b/OpenSim/Region/Physics/Manager/PhysicsActor.cs
index 1c36e55..96dcfb6 100644
--- a/OpenSim/Region/Physics/Manager/PhysicsActor.cs
+++ b/OpenSim/Region/Physics/Manager/PhysicsActor.cs
@@ -202,10 +202,18 @@ namespace OpenSim.Region.Physics.Manager
 
         public virtual void SetMaterial (int material)
         {
-            
         }
 
+        /// <summary>
+        /// Position of this actor.
+        /// </summary>
+        /// <remarks>
+        /// Setting this directly moves the actor to a given position.
+        /// Getting this retrieves the position calculated by physics scene updates, using factors such as velocity and
+        /// collisions.
+        /// </remarks>
         public abstract Vector3 Position { get; set; }
+
         public abstract float Mass { get; }
         public abstract Vector3 Force { get; set; }
 
@@ -215,11 +223,24 @@ namespace OpenSim.Region.Physics.Manager
         public abstract void VehicleRotationParam(int param, Quaternion rotation);
         public abstract void VehicleFlags(int param, bool remove);
 
-        public abstract void SetVolumeDetect(int param);    // Allows the detection of collisions with inherently non-physical prims. see llVolumeDetect for more
+        /// <summary>
+        /// Allows the detection of collisions with inherently non-physical prims. see llVolumeDetect for more
+        /// </summary>
+        public abstract void SetVolumeDetect(int param);
 
         public abstract Vector3 GeometricCenter { get; }
         public abstract Vector3 CenterOfMass { get; }
+
+        /// <summary>
+        /// Velocity of this actor.
+        /// </summary>
+        /// <remarks>
+        /// Setting this provides a target velocity for physics scene updates.
+        /// Getting this returns the velocity calculated by physics scene updates, using factors such as target velocity,
+        /// time to accelerate and collisions.
+        /// </remarks>
         public abstract Vector3 Velocity { get; set; }
+
         public abstract Vector3 Torque { get; set; }
         public abstract float CollisionScore { get; set;}
         public abstract Vector3 Acceleration { get; }
diff --git a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
index 92927e4..7f3ae6b 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
@@ -886,7 +886,6 @@ namespace OpenSim.Region.Physics.OdePlugin
                 d.BodyAddForce(Body, force.X, force.Y, force.Z);
                 //d.BodySetRotation(Body, ref m_StandUpRotation);
                 //standupStraight();
-
             }
         }
 
@@ -901,7 +900,8 @@ namespace OpenSim.Region.Physics.OdePlugin
         /// <param name="timeStep"></param>
         /// <param name="defects">
         /// If there is something wrong with the character (e.g. its position is non-finite)
-        /// then it is added to this list.  The ODE structures associated with it are also destroyed.</param>
+        /// then it is added to this list.  The ODE structures associated with it are also destroyed.
+        /// </param>
         public void Move(float timeStep, List<OdeCharacter> defects)
         {
             //  no lock; for now it's only called from within Simulate()
@@ -966,7 +966,7 @@ namespace OpenSim.Region.Physics.OdePlugin
 
                     d.Vector3 pos = d.BodyGetPosition(Body);
                     vec.X = (_target_velocity.X - vel.X) * (PID_D) + (_zeroPosition.X - pos.X) * (PID_P * 2);
-                    vec.Y = (_target_velocity.Y - vel.Y)*(PID_D) + (_zeroPosition.Y - pos.Y)* (PID_P * 2);
+                    vec.Y = (_target_velocity.Y - vel.Y) * (PID_D) + (_zeroPosition.Y - pos.Y)* (PID_P * 2);
                     if (flying)
                     {
                         vec.Z = (_target_velocity.Z - vel.Z) * (PID_D) + (_zeroPosition.Z - pos.Z) * PID_P;
@@ -995,6 +995,10 @@ namespace OpenSim.Region.Physics.OdePlugin
                     // we're in mid air suspended
                     vec.X = ((_target_velocity.X / movementdivisor) - vel.X) * (PID_D / 6);
                     vec.Y = ((_target_velocity.Y / movementdivisor) - vel.Y) * (PID_D / 6);
+
+//                    m_log.DebugFormat(
+//                        "[ODE CHARACTER]: !m_iscolliding && flying, vec {0}, _target_velocity {1}, movementdivisor {2}, vel {3}",
+//                        vec, _target_velocity, movementdivisor, vel);
                 }
 
                 if (m_iscolliding && !flying && _target_velocity.Z > 0.0f)
@@ -1020,11 +1024,11 @@ namespace OpenSim.Region.Physics.OdePlugin
                     // d.Vector3 pos = d.BodyGetPosition(Body);
                     if (_target_velocity.X > 0)
                     {
-                        vec.X = ((_target_velocity.X - vel.X)/1.2f)*PID_D;
+                        vec.X = ((_target_velocity.X - vel.X) / 1.2f) * PID_D;
                     }
                     if (_target_velocity.Y > 0)
                     {
-                        vec.Y = ((_target_velocity.Y - vel.Y)/1.2f)*PID_D;
+                        vec.Y = ((_target_velocity.Y - vel.Y) / 1.2f) * PID_D;
                     }
                 }
 
@@ -1167,7 +1171,7 @@ namespace OpenSim.Region.Physics.OdePlugin
         /// <summary>
         /// Used internally to destroy the ODE structures associated with this character.
         /// </summary>
-        public void DestroyOdeStructures()
+        private void DestroyOdeStructures()
         {
             // destroy avatar capsule and related ODE data
             if (Amotor != IntPtr.Zero)