obj_movebox mostly done (#2181)

include/d/a/d_a_obj.h

@@ -15,6 +15,12 @@ void posMoveF_grade(fopAc_ac_c*, cXyz const*, cXyz const*, f32, f32, cXyz const*
                     cXyz const*);
 void quat_rotBaseY(Quaternion*, cXyz const&);
 void HitSeStart(cXyz const*, int, dCcD_GObjInf const*, u32);
+
+template <typename T>
+int PrmAbstract(const fopAc_ac_c* i_actor, T i_prmA, T i_prmB) {
+    u32 param = fopAcM_GetParam(i_actor);
+    return ((1 << i_prmA) - 1) & (param >> i_prmB);
+}
 };  // namespace daObj
 
 #endif /* D_A_D_A_OBJ_H */

include/d/bg/d_bg_s.h

@@ -108,7 +108,7 @@ public:
     fopAc_ac_c* PushPullCallBack(cBgS_PolyInfo const&, fopAc_ac_c*, s16, dBgW_Base::PushPullLabel);
 
     bool WaterChk(dBgS_SplGrpChk* chk) { return SplGrpChk(chk); }
-    u32 GetMtrlSndId(cBgS_PolyInfo* param_0) { return dKy_pol_sound_get(param_0); }
+    u32 GetMtrlSndId(const cBgS_PolyInfo& param_0) { return dKy_pol_sound_get(&param_0); }
 };  // Size: 0x1404
 
 bool dBgS_CheckBGroundPoly(cBgS_PolyInfo const&);

include/d/bg/d_bg_s_movebg_actor.h

@@ -20,6 +20,7 @@ public:
     /* 80078950 */ int MoveBGExecute();
 
     int MoveBGDraw() { return Draw(); }
+    int MoveBGIsDelete() { return IsDelete(); }
 
     /* 80078688 */ virtual int CreateHeap();
     /* 80078690 */ virtual int Create();