From 90274434c62ecf7184b609940db4b7059ffdc4e2 Mon Sep 17 00:00:00 2001
From: Teravus Ovares <teravus@gmail.com>
Date: Fri, 9 Nov 2007 13:45:42 +0000
Subject: [PATCH] * Moved BulletX off of the 'constant terse update' method. 
 It now only sends terse updates when needed. * Removed the 'constant poll
 method' from SceneObjectPart.cs - It was bad :P * Updated some Masses in ODE
 to help large prim slow down by friction easier.

---
 .../Environment/Scenes/SceneObjectPart.cs     | 11 +++++---
 .../Physics/BulletXPlugin/BulletXPlugin.cs    | 26 +++++++++++++++++++
 OpenSim/Region/Physics/OdePlugin/OdePlugin.cs | 15 ++++++++---
 3 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs b/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs
index f54b52f3db..7575fad2a7 100644
--- a/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneObjectPart.cs
@@ -603,11 +603,14 @@ namespace OpenSim.Region.Environment.Scenes
             {
                 AddTerseUpdateToAllAvatars();
                 ClearUpdateSchedule();
-                if ((ObjectFlags & (uint)LLObject.ObjectFlags.Physics) != 0)
-                {
+
+                // This causes the Scene to 'poll' physical objects every couple of frames
+                // bad, so it's been replaced by an event driven method.
+                //if ((ObjectFlags & (uint)LLObject.ObjectFlags.Physics) != 0)
+                //{
                     // Only send the constant terse updates on physical objects!   
-                    ScheduleTerseUpdate();
-                }
+                    //ScheduleTerseUpdate();
+                //}
             }
             else
             {
diff --git a/OpenSim/Region/Physics/BulletXPlugin/BulletXPlugin.cs b/OpenSim/Region/Physics/BulletXPlugin/BulletXPlugin.cs
index cdccc70f87..2e6e40fad8 100644
--- a/OpenSim/Region/Physics/BulletXPlugin/BulletXPlugin.cs
+++ b/OpenSim/Region/Physics/BulletXPlugin/BulletXPlugin.cs
@@ -819,6 +819,10 @@ namespace OpenSim.Region.Physics.BulletXPlugin
         internal protected virtual void ReSize(PhysicsVector _newSize)
         {
         }
+        public virtual void ScheduleTerseUpdate()
+        {
+            base.RequestPhysicsterseUpdate();
+        }
         #endregion
     }
 
@@ -1003,6 +1007,8 @@ namespace OpenSim.Region.Physics.BulletXPlugin
         //For now all prims have the same density, all prims are made of water. Be water my friend! :D
         private const float _density = 1000.0f;
         private BulletXScene _parent_scene;
+        private PhysicsVector m_prev_position = new PhysicsVector(0, 0, 0);
+        private bool m_lastUpdateSent = false;
 
         public BulletXPrim(String primName, BulletXScene parent_scene, PhysicsVector pos, PhysicsVector size,
                            AxiomQuaternion rotation, Mesh mesh, PrimitiveBaseShape pbs, bool isPhysical)
@@ -1148,8 +1154,28 @@ namespace OpenSim.Region.Physics.BulletXPlugin
             if (_physical) //Updates properties. Prim updates its properties physically
             {
                 _position = BulletXMaths.XnaVector3ToPhysicsVector(rigidBody.CenterOfMassPosition);
+
                 _velocity = BulletXMaths.XnaVector3ToPhysicsVector(rigidBody.LinearVelocity);
                 _orientation = BulletXMaths.XnaQuaternionToAxiomQuaternion(rigidBody.Orientation);
+
+                if ((Math.Abs(m_prev_position.X - _position.X) < 0.03)
+                    && (Math.Abs(m_prev_position.Y - _position.Y) < 0.03)
+                    && (Math.Abs(m_prev_position.Z - _position.Z) < 0.03))
+                {
+                    if (!m_lastUpdateSent)
+                    {
+                        _velocity = new PhysicsVector(0, 0, 0);
+                        base.ScheduleTerseUpdate();
+                        m_lastUpdateSent = true;
+                    }
+                }
+                else
+                {
+                    m_lastUpdateSent = false;
+                    base.ScheduleTerseUpdate();
+                    
+                }
+                m_prev_position = _position;
             }
             else //Doesn't updates properties. That's a cancel
             {
diff --git a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
index 4750e54556..79f51a1a03 100644
--- a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
+++ b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
@@ -124,7 +124,8 @@ namespace OpenSim.Region.Physics.OdePlugin
                 space = d.HashSpaceCreate(IntPtr.Zero);
                 contactgroup = d.JointGroupCreate(0);
                 //contactgroup
-               
+
+                            
                 d.WorldSetGravity(world, 0.0f, 0.0f, -10.0f);
                 d.WorldSetAutoDisableFlag(world, false);
                 d.WorldSetContactSurfaceLayer(world, 0.001f);
@@ -936,7 +937,7 @@ namespace OpenSim.Region.Physics.OdePlugin
         private String m_primName;
         private PhysicsVector _target_velocity;
         public d.Mass pMass;
-        private const float MassMultiplier = 500f; //  Ref: Water: 1000kg..  this iset to 500
+        private const float MassMultiplier = 150f; //  Ref: Water: 1000kg..  this iset to 500
         private int debugcounter = 0;
 
 
@@ -1361,7 +1362,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                     //System.Console.WriteLine(Math.Abs(m_lastposition.X - l_position.X).ToString());
                     _zeroFlag = false;
                 }
-                m_lastposition = l_position;
+                
 
 
                 if (_zeroFlag)
@@ -1379,6 +1380,11 @@ namespace OpenSim.Region.Physics.OdePlugin
                     m_rotationalVelocity.X = 0;
                     m_rotationalVelocity.Y = 0;
                     m_rotationalVelocity.Z = 0;
+                    if (!m_lastUpdateSent)
+                    {
+                        base.RequestPhysicsterseUpdate();
+                        m_lastUpdateSent = true;
+                    }
 
                 }
                 else
@@ -1399,9 +1405,10 @@ namespace OpenSim.Region.Physics.OdePlugin
                     _orientation.x = ori.X;
                     _orientation.y = ori.Y;
                     _orientation.z = ori.Z;
+                    m_lastUpdateSent = false;
                     base.RequestPhysicsterseUpdate();
                 }
-
+                m_lastposition = l_position;
             }
             else
             {