BulletSim: Remove calculation and passing of unused collied object type.

Fix collision code to properly sense mega-region children regions as terrain.
When setting an object physical, reset all the physical properties (friction, ...).

OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs

@@ -529,22 +529,20 @@ public class BSCharacter : BSPhysObject
     // The collision, if it should be reported to the character, is placed in a collection
     //   that will later be sent to the simulator when SendCollisions() is called.
     CollisionEventUpdate collisionCollection = null;
-    public override bool Collide(uint collidingWith, BSPhysObject collidee, ActorTypes type, Vector3 contactPoint, Vector3 contactNormal, float pentrationDepth)
+    public override bool Collide(uint collidingWith, BSPhysObject collidee, Vector3 contactPoint, Vector3 contactNormal, float pentrationDepth)
     {
-        // m_log.DebugFormat("{0}: Collide: ms={1}, id={2}, with={3}", LogHeader, _subscribedEventsMs, LocalID, collidingWith);
-
         bool ret = false;
 
         // The following makes IsColliding() and IsCollidingGround() work
         _collidingStep = Scene.SimulationStep;
-        if (collidingWith == BSScene.TERRAIN_ID || collidingWith == BSScene.GROUNDPLANE_ID)
+        if (collidingWith <= Scene.TerrainManager.HighestTerrainID)
         {
             _collidingGroundStep = Scene.SimulationStep;
         }
         // DetailLog("{0},BSCharacter.Collison,call,with={1}", LocalID, collidingWith);
 
         // throttle collisions to the rate specified in the subscription
-        if (_subscribedEventsMs != 0) {
+        if (SubscribedEvents()) {
             int nowTime = Scene.SimulationNowTime;
             if (nowTime >= _nextCollisionOkTime) {
                 _nextCollisionOkTime = nowTime + _subscribedEventsMs;

OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs

@@ -41,7 +41,7 @@ public abstract class BSPhysObject : PhysicsActor
 {
     public abstract BSLinkset Linkset { get; set; }
 
-    public abstract bool Collide(uint collidingWith, BSPhysObject collidee, ActorTypes type,
+    public abstract bool Collide(uint collidingWith, BSPhysObject collidee,
             OMV.Vector3 contactPoint, OMV.Vector3 contactNormal, float pentrationDepth);
     public abstract void SendCollisions();
 

OpenSim/Region/Physics/BulletSPlugin/BSPrim.cs

@@ -545,14 +545,31 @@ public sealed class BSPrim : BSPhysObject
         {
             // Not a Bullet static object
             m_currentCollisionFlags = BulletSimAPI.RemoveFromCollisionFlags2(BSBody.Ptr, CollisionFlags.CF_STATIC_OBJECT);
+
+            // Set various physical properties so internal things will get computed correctly as they are set
+            BulletSimAPI.SetFriction2(BSBody.Ptr, Scene.Params.defaultFriction);
+            BulletSimAPI.SetRestitution2(BSBody.Ptr, Scene.Params.defaultRestitution);
+            // per http://www.bulletphysics.org/Bullet/phpBB3/viewtopic.php?t=3382
+            BulletSimAPI.SetInterpolationLinearVelocity2(BSBody.Ptr, OMV.Vector3.Zero);
+            BulletSimAPI.SetInterpolationAngularVelocity2(BSBody.Ptr, OMV.Vector3.Zero);
+            BulletSimAPI.SetInterpolationVelocity2(BSBody.Ptr, OMV.Vector3.Zero, OMV.Vector3.Zero);
+
             // A dynamic object has mass
             IntPtr collisionShapePtr = BulletSimAPI.GetCollisionShape2(BSBody.Ptr);
             OMV.Vector3 inertia = BulletSimAPI.CalculateLocalInertia2(collisionShapePtr, Linkset.LinksetMass);
             BulletSimAPI.SetMassProps2(BSBody.Ptr, _mass, inertia);
             // Inertia is based on our new mass
             BulletSimAPI.UpdateInertiaTensor2(BSBody.Ptr);
+
+            // Various values for simulation limits
+            BulletSimAPI.SetDamping2(BSBody.Ptr, Scene.Params.linearDamping, Scene.Params.angularDamping);
+            BulletSimAPI.SetDeactivationTime2(BSBody.Ptr, Scene.Params.deactivationTime);
+            BulletSimAPI.SetSleepingThresholds2(BSBody.Ptr, Scene.Params.linearSleepingThreshold, Scene.Params.angularSleepingThreshold);
+            BulletSimAPI.SetContactProcessingThreshold2(BSBody.Ptr, Scene.Params.contactProcessingThreshold);
+
             // There can be special things needed for implementing linksets
             Linkset.MakeDynamic(this);
+
             // Force activation of the object so Bullet will act on it.
             BulletSimAPI.Activate2(BSBody.Ptr, true);
         }
@@ -1475,16 +1492,15 @@ public sealed class BSPrim : BSPhysObject
     // I've collided with something
     // Called at taint time from within the Step() function
     CollisionEventUpdate collisionCollection;
-    public override bool Collide(uint collidingWith, BSPhysObject collidee, ActorTypes type, OMV.Vector3 contactPoint, OMV.Vector3 contactNormal, float pentrationDepth)
+    public override bool Collide(uint collidingWith, BSPhysObject collidee, OMV.Vector3 contactPoint, OMV.Vector3 contactNormal, float pentrationDepth)
     {
-        // m_log.DebugFormat("{0}: Collide: ms={1}, id={2}, with={3}", LogHeader, _subscribedEventsMs, LocalID, collidingWith);
         bool ret = false;
 
         // The following lines make IsColliding() and IsCollidingGround() work
-        _collidingStep = _scene.SimulationStep;
+        _collidingStep = Scene.SimulationStep;
-        if (collidingWith == BSScene.TERRAIN_ID || collidingWith == BSScene.GROUNDPLANE_ID)
+        if (collidingWith <= Scene.TerrainManager.HighestTerrainID)
         {
-            _collidingGroundStep = _scene.SimulationStep;
+            _collidingGroundStep = Scene.SimulationStep;
         }
 
         // DetailLog("{0},BSPrim.Collison,call,with={1}", LocalID, collidingWith);
@@ -1498,7 +1514,7 @@ public sealed class BSPrim : BSPhysObject
         // if someone has subscribed for collision events....
         if (SubscribedEvents()) {
             // throttle the collisions to the number of milliseconds specified in the subscription
-            int nowTime = _scene.SimulationNowTime;
+            int nowTime = Scene.SimulationNowTime;
             if (nowTime >= _nextCollisionOkTime) {
                 _nextCollisionOkTime = nowTime + _subscribedEventsMs;
 

OpenSim/Region/Physics/BulletSPlugin/BSScene.cs

@@ -583,27 +583,21 @@ public class BSScene : PhysicsScene, IPhysicsParameters
             return;         // don't send collisions to the terrain
         }
 
-        BSPhysObject collider = PhysObjects[localID];
+        BSPhysObject collider;
-        // TODO: as of this code, terrain was not in the physical object list.
+        if (!PhysObjects.TryGetValue(localID, out collider))
-        //    When BSTerrain is created and it will be in the list, we can remove
+        {
-        //    the possibility that it's not there and just fetch the collidee.
+            // If the object that is colliding cannot be found, just ignore the collision.
-        BSPhysObject collidee = null;
+            return;
+        }
 
-        ActorTypes type = ActorTypes.Prim;
+        // The terrain is not in the physical object list so 'collidee'
-        if (collidingWith <= TerrainManager.HighestTerrainID)
+        //    can be null when Collide() is called.
-        {
+        BSPhysObject collidee = null;
-            type = ActorTypes.Ground;
+        PhysObjects.TryGetValue(collidingWith, out collidee);
-        }
-        else
-        {
-            collidee = PhysObjects[collidingWith];
-            if (collidee is BSCharacter)
-                type = ActorTypes.Agent;
-        }
 
         // DetailLog("{0},BSScene.SendCollision,collide,id={1},with={2}", DetailLogZero, localID, collidingWith);
 
-        if (collider.Collide(collidingWith, collidee, type, collidePoint, collideNormal, penetration))
+        if (collider.Collide(collidingWith, collidee, collidePoint, collideNormal, penetration))
         {
             // If a collision was posted, remember to send it to the simulator
             m_objectsWithCollisions.Add(collider);