d_a_obj_cdoor OK, d_a_obj_wchain mostly done, work on d_a_alink_wolf (#2047)

include/d/com/d_com_inf_game.h

@@ -3780,6 +3780,10 @@ inline void dComIfGd_setListZxlu() {
     g_dComIfG_gameInfo.drawlist.setXluListZxlu();
 }
 
+inline J3DDrawBuffer* dComIfGd_getOpaList() {
+    return g_dComIfG_gameInfo.drawlist.getOpaList();
+}
+
 inline J3DDrawBuffer* dComIfGd_getOpaListBG() {
     return g_dComIfG_gameInfo.drawlist.getOpaListBG();
 }

include/d/d_drawlist.h

@@ -305,6 +305,7 @@ public:
     void setView(view_class* view) { mView = view; }
     void setWindow(dDlst_window_c* window) { mWindow = window; }
     void setViewport(view_port_class* port) { mViewport = port; }
+    J3DDrawBuffer* getOpaList() { return mDrawBuffers[DB_OPA_LIST]; }
     J3DDrawBuffer* getOpaListFilter() { return mDrawBuffers[DB_LIST_FILTER]; }
     J3DDrawBuffer* getOpaListP0() { return mDrawBuffers[DB_LIST_P0]; }
     J3DDrawBuffer* getOpaListPacket() { return mDrawBuffers[DB_OPA_LIST_PACKET]; }