BulletSim: most of the plumbing for raycast. Needs new BulletSim.dll to

work.

OpenSim/Region/PhysicsModules/BulletS/BSParam.cs

@@ -230,6 +230,8 @@ public static class BSParam
     public static float LinkConstraintCFM { get; private set; }
     public static float LinkConstraintSolverIterations { get; private set; }
 
+    public static bool UseBulletRaycast { get; private set; }
+
     public static float PID_D { get; private set; }    // derivative
     public static float PID_P { get; private set; }    // proportional
 
@@ -823,6 +825,9 @@ public static class BSParam
         new ParameterDefn<float>("LinkConstraintSolverIterations", "Number of solver iterations when computing constraint. (0 = Bullet default)",
             40 ),
 
+        new ParameterDefn<bool>("UseBulletRaycast", "If 'true', use the raycast function of the Bullet physics engine",
+            true ),
+
         new ParameterDefn<float>("DebugNumber", "A console setable number sometimes used for debugging",
             1.0f ),