Add plumbing for physics properties to get to the physics engine.

Addition of entries to PhysicsActor and setting code in SceneObjectPart.

OpenSim/Region/Framework/Scenes/SceneObjectPart.cs

@@ -1387,10 +1387,46 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
-        public float Density { get; set; }
+        private float m_density = 10f;
-        public float GravityModifier { get; set; }
+        public float Density {
-        public float Friction { get; set; }
+            get { return m_density; }
-        public float Restitution { get; set; }
+            set
+            {
+                m_density = value;
+                if (PhysActor != null)
+                    PhysActor.Density = m_density;
+            }
+        }
+        private float m_gravityModifier = 1f;
+        public float GravityModifier {
+            get { return m_gravityModifier; }
+            set
+            {
+                m_gravityModifier = value;
+                if (PhysActor != null)
+                    PhysActor.GravityModifier = m_gravityModifier;
+            }
+        }
+        private float m_friction = 0.5f;
+        public float Friction { 
+            get { return m_friction; }
+            set
+            {
+                m_friction = value;
+                if (PhysActor != null)
+                    PhysActor.Friction = m_friction;
+            }
+        }
+        private float m_restitution = 0f;
+        public float Restitution { 
+            get { return m_restitution; }
+            set
+            {
+                m_restitution = value;
+                if (PhysActor != null)
+                    PhysActor.Restitution = m_restitution;
+            }
+        }
 
         #endregion Public Properties with only Get
 
@@ -1896,8 +1932,18 @@ namespace OpenSim.Region.Framework.Scenes
                             {
                                 ParentGroup.Scene.AddPhysicalPrim(1);
 
+                                // Update initial values for various physical properties
+                                pa.SetMaterial(Material);
+                                pa.Density = Density;
+                                pa.Friction = Friction;
+                                pa.Restitution = Restitution;
+                                pa.GravityModifier = GravityModifier;
+
+                                // Link up callbacks for property updates from the physics engine
                                 pa.OnRequestTerseUpdate += PhysicsRequestingTerseUpdate;
                                 pa.OnOutOfBounds += PhysicsOutOfBounds;
+
+                                // If this is a child prim, tell the physics engine about the parent
                                 if (ParentID != 0 && ParentID != LocalId)
                                 {
                                     PhysicsActor parentPa = ParentGroup.RootPart.PhysActor;
@@ -4062,7 +4108,6 @@ namespace OpenSim.Region.Framework.Scenes
 
                     if (pa != null)
                     {
-                        pa.SetMaterial(Material);
                         DoPhysicsPropertyUpdate(UsePhysics, true);
     
                         if (
@@ -4175,7 +4220,6 @@ namespace OpenSim.Region.Framework.Scenes
             if (pa != null)
             {
                 pa.SOPName = this.Name; // save object into the PhysActor so ODE internals know the joint/body info
-                pa.SetMaterial(Material);
                 DoPhysicsPropertyUpdate(rigidBody, true);
             }
 

OpenSim/Region/Physics/Manager/PhysicsActor.cs

@@ -235,6 +235,11 @@ namespace OpenSim.Region.Physics.Manager
         public abstract float Mass { get; }
         public abstract Vector3 Force { get; set; }
 
+        public virtual float Density { get; set; }
+        public virtual float Friction { get; set; }
+        public virtual float Restitution { get; set; }
+        public virtual float GravityModifier { get; set; }
+
         public abstract int VehicleType { get; set; }
         public abstract void VehicleFloatParam(int param, float value);
         public abstract void VehicleVectorParam(int param, Vector3 value);