BulletSim: add physical object initialized flag so updates and collisions

don't happen until the object is completely initialized.

This fixes the problem of doing a teleport while the simulator is running.
The destruction of the physical object while the engine is running means
that the physics parameter update would overwrite the new position of the
newly created avatar.

OpenSim/Region/Physics/BulletSPlugin/BSActorAvatarMove.cs

@@ -69,7 +69,9 @@ public class BSActorAvatarMove : BSActor
     // BSActor.Dispose()
     public override void Dispose()
     {
-        Enabled = false;
+        base.SetEnabled(false);
+        // Now that turned off, remove any state we have in the scene.
+        Refresh();
     }
 
     // Called when physical parameters (properties set in Bullet) need to be re-applied.

OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs

@@ -107,6 +107,8 @@ public sealed class BSCharacter : BSPhysObject
             PhysicalActors.Add(AvatarMoveActorName, m_moveActor);
 
             SetPhysicalProperties();
+
+            IsInitialized = true;
         });
         return;
     }
@@ -114,6 +116,8 @@ public sealed class BSCharacter : BSPhysObject
     // called when this character is being destroyed and the resources should be released
     public override void Destroy()
     {
+        IsInitialized = false;
+
         base.Destroy();
 
         DetailLog("{0},BSCharacter.Destroy", LocalID);

OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs

@@ -72,6 +72,8 @@ public abstract class BSPhysObject : PhysicsActor
     }
     protected BSPhysObject(BSScene parentScene, uint localID, string name, string typeName)
     {
+        IsInitialized = false;
+
         PhysScene = parentScene;
         LocalID = localID;
         PhysObjectName = name;
@@ -130,6 +132,8 @@ public abstract class BSPhysObject : PhysicsActor
     public string PhysObjectName { get; protected set; }
     public string TypeName { get; protected set; }
 
+    // Set to 'true' when the object is completely initialized
+    public bool IsInitialized { get; protected set; }
 
     // Return the object mass without calculating it or having side effects
     public abstract float RawMass { get; }

OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs

@@ -110,6 +110,8 @@ public class BSPrim : BSPhysObject
             CreateGeomAndObject(true);
 
             CurrentCollisionFlags = PhysScene.PE.GetCollisionFlags(PhysBody);
+
+            IsInitialized = true;
         });
     }
 
@@ -117,6 +119,8 @@ public class BSPrim : BSPhysObject
     public override void Destroy()
     {
         // m_log.DebugFormat("{0}: Destroy, id={1}", LogHeader, LocalID);
+        IsInitialized = false;
+
         base.Destroy();
 
         // Undo any vehicle properties

OpenSim/Region/Physics/BulletSPlugin/BSScene.cs

@@ -639,6 +639,7 @@ public sealed class BSScene : PhysicsScene, IPhysicsParameters
                     BSPhysObject pobj;
                     if (PhysObjects.TryGetValue(entprop.ID, out pobj))
                     {
+                        if (pobj.IsInitialized)
                             pobj.UpdateProperties(entprop);
                     }
                 }
@@ -766,11 +767,14 @@ public sealed class BSScene : PhysicsScene, IPhysicsParameters
 
         // DetailLog("{0},BSScene.SendCollision,collide,id={1},with={2}", DetailLogZero, localID, collidingWith);
 
+        if (collider.IsInitialized)
+        {
             if (collider.Collide(collidingWith, collidee, collidePoint, collideNormal, penetration))
             {
                 // If a collision was 'good', remember to send it to the simulator
                 ObjectsWithCollisions.Add(collider);
             }
+        }
 
         return;
     }