BulletSim: subclass Bullet[World|Body|Shape|Constraint] for unmanaged

to have pointers and managed to have objects.
Initial paste of XNA code. Commented out.

OpenSim/Region/Physics/BulletSPlugin/BulletSimData.cs

@@ -33,17 +33,23 @@ namespace OpenSim.Region.Physics.BulletSPlugin
 {
 // Classes to allow some type checking for the API
 // These hold pointers to allocated objects in the unmanaged space.
+// These classes are subclassed by the various physical implementations of
+// objects. In particular, there is a version for physical instances in
+// unmanaged memory ("unman") and one for in managed memory ("XNA").
+
+// Currently, the instances of these classes are a reference to a
+// physical representation and this has no releationship to other
+// instances. Someday, refarb the usage of these classes so each instance
+// refers to a particular physical instance and this class controls reference
+// counts and such. This should be done along with adding BSShapes.
 
-// The physics engine controller class created at initialization
 public class BulletWorld
 {
-    public BulletWorld(uint worldId, BSScene bss, IntPtr xx)
+    public BulletWorld(uint worldId, BSScene bss)
     {
-        ptr = xx;
         worldID = worldId;
         physicsScene = bss;
     }
-    public IntPtr ptr;
     public uint worldID;
     // The scene is only in here so very low level routines have a handle to print debug/error messages
     public BSScene physicsScene;
@@ -52,27 +58,19 @@ public class BulletWorld
 // An allocated Bullet btRigidBody
 public class BulletBody
 {
-    public BulletBody(uint id) : this(id, IntPtr.Zero)
-    {
-    }
-    public BulletBody(uint id, IntPtr xx)
+    public BulletBody(uint id)
     {
         ID = id;
-        ptr = xx;
         collisionType = CollisionType.Static;
     }
-    public IntPtr ptr;
     public uint ID;
     public CollisionType collisionType;
 
-    public void Clear()
-    {
-        ptr = IntPtr.Zero;
-    }
-    public bool HasPhysicalBody { get { return ptr != IntPtr.Zero; } }
+    public virtual void Clear() { }
+    public virtual bool HasPhysicalBody { get { return false; } }
 
     // Apply the specificed collision mask into the physical world
-    public bool ApplyCollisionMask(BSScene physicsScene)
+    public virtual bool ApplyCollisionMask(BSScene physicsScene)
     {
         // Should assert the body has been added to the physical world.
         // (The collision masks are stored in the collision proxy cache which only exists for
@@ -83,12 +81,9 @@ public class BulletBody
     }
 
     // Used for log messages for a unique display of the memory/object allocated to this instance
-    public string AddrString
+    public virtual string AddrString
     {
-        get
-        {
-            return ptr.ToString("X");
-        }
+        get { return "unknown"; }
     }
 
     public override string ToString()
@@ -108,38 +103,26 @@ public class BulletBody
 public class BulletShape
 {
     public BulletShape()
-        : this(IntPtr.Zero, BSPhysicsShapeType.SHAPE_UNKNOWN)
     {
-    }
-    public BulletShape(IntPtr xx)
-        : this(xx, BSPhysicsShapeType.SHAPE_UNKNOWN)
-    {
-    }
-    public BulletShape(IntPtr xx, BSPhysicsShapeType typ)
-    {
-        ptr = xx;
-        type = typ;
+        type = BSPhysicsShapeType.SHAPE_UNKNOWN;
         shapeKey = (System.UInt64)FixedShapeKey.KEY_NONE;
         isNativeShape = false;
     }
-    public IntPtr ptr;
     public BSPhysicsShapeType type;
     public System.UInt64 shapeKey;
     public bool isNativeShape;
 
-    public void Clear()
-    {
-        ptr = IntPtr.Zero;
-    }
-    public bool HasPhysicalShape { get { return ptr != IntPtr.Zero; } }
+    public virtual void Clear() { }
+    public virtual bool HasPhysicalShape { get { return false; } }
+    // Make another reference to this physical object.
+    public virtual BulletShape Clone() { return new BulletShape(); }
+    // Return 'true' if this and other refer to the same physical object
+    public virtual bool ReferenceSame(BulletShape xx) { return false; }
 
     // Used for log messages for a unique display of the memory/object allocated to this instance
-    public string AddrString
+    public virtual string AddrString
     {
-        get
-        {
-            return ptr.ToString("X");
-        }
+        get { return "unknown"; }
     }
 
     public override string ToString()
@@ -161,25 +144,16 @@ public class BulletShape
 // An allocated Bullet btConstraint
 public class BulletConstraint
 {
-    public BulletConstraint(IntPtr xx)
+    public BulletConstraint()
     {
-        ptr = xx;
     }
-    public IntPtr ptr;
-
-    public void Clear()
-    {
-        ptr = IntPtr.Zero;
-    }
-    public bool HasPhysicalConstraint { get { return ptr != IntPtr.Zero; } }
+    public virtual void Clear() { }
+    public virtual bool HasPhysicalConstraint { get { return false; } }
 
     // Used for log messages for a unique display of the memory/object allocated to this instance
-    public string AddrString
+    public virtual string AddrString
     {
-        get
-        {
-            return ptr.ToString("X");
-        }
+        get { return "unknown"; }
     }
 }