1 files changed, 79 insertions, 14 deletions

diff --git a/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs b/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
index 17552d2..b0e9a91 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
@@ -21,6 +21,18 @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Revised August 26 2009 by Kitto Flora. ODEDynamics.cs replaces
+ * ODEVehicleSettings.cs. It and ODEPrim.cs are re-organised:
+ * ODEPrim.cs contains methods dealing with Prim editing, Prim
+ * characteristics and Kinetic motion.
+ * ODEDynamics.cs contains methods dealing with Prim Physical motion
+ * (dynamics) and the associated settings. Old Linear and angular
+ * motors for dynamic motion have been replace with  MoveLinear()
+ * and MoveAngular(); 'Physical' is used only to switch ODE dynamic 
+ * simualtion on/off; VEHICAL_TYPE_NONE/VEHICAL_TYPE_<other> is to
+ * switch between 'VEHICLE' parameter use and general dynamics
+ * settings use.
  */
 
 /*
@@ -81,7 +93,12 @@ namespace OpenSim.Region.Physics.OdePlugin
         private float m_PIDTau;
         private float PID_D = 35f;
         private float PID_G = 25f;
-        private bool m_usePID;
+        private bool m_usePID = false;
+        
+        private Quaternion m_APIDTarget = new Quaternion();
+        private float m_APIDStrength = 0.5f;
+        private float m_APIDDamping = 0.5f;
+        private bool m_useAPID = false;
 
         // KF: These next 7 params apply to llSetHoverHeight(float height, integer water, float tau),
         // and are for non-VEHICLES only.
@@ -182,6 +199,9 @@ namespace OpenSim.Region.Physics.OdePlugin
         private ODEDynamics m_vehicle;
 
         internal int m_material = (int)Material.Wood;
+        
+        private int frcount = 0;                                                                                // Used to limit dynamics debug output to 
+
 
         public OdePrim(String primName, OdeScene parent_scene, Vector3 pos, Vector3 size,
                        Quaternion rotation, IMesh mesh, PrimitiveBaseShape pbs, bool pisPhysical, CollisionLocker dode)
@@ -1558,9 +1578,14 @@ Console.WriteLine(" JointCreateFixed");
             float fy = 0;
             float fz = 0;
 
+            frcount++;                                  // used to limit debug comment output
+            if (frcount > 100)
+                frcount = 0;
                 
             if (IsPhysical && (Body != IntPtr.Zero) && !m_isSelected && !childPrim)             // KF: Only move root prims.
             {
+//if(frcount == 0) Console.WriteLine("Move " +  m_primName + "  VTyp " + m_vehicle.Type +
+                        //                      "    usePID=" + m_usePID  + "    seHover=" + m_useHoverPID  + "  useAPID=" + m_useAPID);                
                 if (m_vehicle.Type != Vehicle.TYPE_NONE)
                 {
                         // 'VEHICLES' are dealt with in ODEDynamics.cs
@@ -1568,7 +1593,6 @@ Console.WriteLine(" JointCreateFixed");
                 }
                 else
                 {
-//Console.WriteLine("Move " +  m_primName);             
                         if(!d.BodyIsEnabled (Body))  d.BodyEnable (Body); // KF add 161009
                         // NON-'VEHICLES' are dealt with here
                         if (d.BodyIsEnabled(Body) && !m_angularlock.ApproxEquals(Vector3.Zero, 0.003f))
@@ -1590,21 +1614,18 @@ Console.WriteLine(" JointCreateFixed");
                     //m_log.Info(m_collisionFlags.ToString());
 
                         
-                        //KF: m_buoyancy should be set by llSetBuoyancy() for non-vehicle.
-                        // would come from SceneObjectPart.cs, public void SetBuoyancy(float fvalue) , PhysActor.Buoyancy = fvalue; ??
+                        //KF: m_buoyancy is set by llSetBuoyancy() and is for non-vehicle.
                         // m_buoyancy: (unlimited value) <0=Falls fast; 0=1g; 1=0g; >1 = floats up 
-                        // gravityz multiplier = 1 - m_buoyancy
-                        fz = _parent_scene.gravityz * (1.0f - m_buoyancy) * m_mass;
+                        // NB Prims in ODE are no subject to global gravity
+                        fz = _parent_scene.gravityz * (1.0f - m_buoyancy) * m_mass; // force = acceleration * mass
 
                         if (m_usePID)
                         {
-//Console.WriteLine("PID " +  m_primName);              
-                        // KF - this is for object move? eg. llSetPos() ?
+//if(frcount == 0) Console.WriteLine("PID " +  m_primName);             
+                        // KF - this is for object MoveToTarget.
+                        
                             //if (!d.BodyIsEnabled(Body))
                             //d.BodySetForce(Body, 0f, 0f, 0f);
-                            // If we're using the PID controller, then we have no gravity
-                            //fz = (-1 * _parent_scene.gravityz) * m_mass;      //KF: ?? Prims have no global gravity,so simply...
-                            fz = 0f;
 
                             //  no lock; for now it's only called from within Simulate()
         
@@ -1739,7 +1760,7 @@ Console.WriteLine(" JointCreateFixed");
                             d.BodySetPosition(Body, pos.X, pos.Y, m_targetHoverHeight);
                             d.BodySetLinearVel(Body, vel.X, vel.Y, 0);
                             d.BodyAddForce(Body, 0, 0, fz);
-                            return;
+                    //KF this prevents furthur motions        return;
                         }
                         else
                         {
@@ -1748,8 +1769,46 @@ Console.WriteLine(" JointCreateFixed");
                             // We're flying and colliding with something
                             fz = fz + ((_target_velocity.Z - vel.Z) * (PID_D) * m_mass);
                         }
-                    }
-
+                    } // end m_useHoverPID && !m_usePID
+                    
+                        if (m_useAPID)
+                        {
+                                // RotLookAt, apparently overrides all other rotation sources. Inputs:
+                                // Quaternion m_APIDTarget
+                                                // float m_APIDStrength         // From SL experiments, this is the time to get there
+                                                // float m_APIDDamping          // From SL experiments, this is damping, 1.0 = damped, 0.1 = wobbly
+                                                                                                        // Also in SL the mass of the object has no effect on time to get there.
+                                                // Factors:
+//if(frcount == 0) Console.WriteLine("APID ");                                                  
+                                    // get present body rotation
+                                    float limit = 1.0f;
+                                    float scaler = 50f;         // adjusts damping time
+                                    float RLAservo = 0f;
+                                    
+                                    d.Quaternion rot = d.BodyGetQuaternion(Body);
+                                    Quaternion rotq = new Quaternion(rot.X, rot.Y, rot.Z, rot.W);
+                                    Quaternion rot_diff = Quaternion.Inverse(rotq) * m_APIDTarget;
+                        float diff_angle;
+                        Vector3 diff_axis;
+                        rot_diff.GetAxisAngle(out diff_axis, out diff_angle);
+                        diff_axis.Normalize();
+                                                if(diff_angle > 0.01f)                  // diff_angle is always +ve
+                                                {
+//                              PhysicsVector rotforce = new PhysicsVector(diff_axis.X, diff_axis.Y, diff_axis.Z);
+                                Vector3 rotforce = new Vector3(diff_axis.X, diff_axis.Y, diff_axis.Z);
+                            rotforce = rotforce * rotq;
+                            if(diff_angle > limit) diff_angle = limit;          // cap the rotate rate
+//                          RLAservo = timestep / m_APIDStrength * m_mass * scaler;
+  //                        rotforce = rotforce * RLAservo * diff_angle ;
+    //                      d.BodyAddRelTorque(Body, rotforce.X, rotforce.Y, rotforce.Z);
+                            RLAservo = timestep / m_APIDStrength * scaler;
+                            rotforce = rotforce * RLAservo * diff_angle ;
+                                                        d.BodySetAngularVel (Body,  rotforce.X, rotforce.Y, rotforce.Z);
+//Console.WriteLine("axis= " + diff_axis + "    angle= " + diff_angle + "servo= " + RLAservo);                                                  
+                                                }
+//if(frcount == 0) Console.WriteLine("mass= " + m_mass + "  servo= " + RLAservo + "   angle= " + diff_angle);                                                   
+                        } // end m_useAPID
+                        
                     fx *= m_mass;
                     fy *= m_mass;
                     //fz *= m_mass;
@@ -2816,6 +2875,12 @@ Console.WriteLine(" JointCreateFixed");
         }
         public override bool PIDActive { set { m_usePID = value; } }
         public override float PIDTau { set { m_PIDTau = value; } }
+        
+                // For RotLookAt        
+        public override Quaternion APIDTarget { set { m_APIDTarget = value; } }
+        public override bool APIDActive { set { m_useAPID = value; } }
+        public override float APIDStrength { set { m_APIDStrength = value; } }
+        public override float APIDDamping { set { m_APIDDamping = value; } }
 
         public override float PIDHoverHeight { set { m_PIDHoverHeight = value; ; } }
         public override bool PIDHoverActive { set { m_useHoverPID = value; } }