d_a_obj_lv6bemos2 and d_a_obj_lv6bemos almost equivalent (#2527)

* initial work

* All but one function equivalent

* Missed comment that needed to be removed

* initial work

* got to CreateHeap

* d_a_obj_lv6bemos almost equivalent

include/f_op/f_op_actor_mng.h

@@ -835,6 +835,11 @@ public:
         getTriPla(&poly);
         return cBgW_CheckBWall(poly.mNormal.y);
     }
+    static bool checkGroundHit() {
+        cM3dGPla poly;
+        getTriPla(&poly);
+        return cBgW_CheckBGround(poly.mNormal.y);
+    }
 
     static dBgS_ObjLinChk mLineCheck;
 };