{
engine_main_arrays_are_static;

sector;
wall;
sprite;
spriteext;

numsectors;
numwalls;
numyaxbunches;

headspritesect;
headspritestat;
prevspritesect;
prevspritestat;
nextspritesect;
nextspritestat;

headsectbunch;
nextsectbunch;

actor;
ud;
};
