Free Hero Mesh

#define PushFlowControl() do{ flowblock[flowptr]=ofs+2+(op[1]<<1)+(op[2]<<9); if(++flowptr==64) fatal("Too many nested flow controls\n"); len+=2; ind+=2; }while(0)

static void class_codes(FILE*fp,const unsigned char*op,int ofs,const unsigned char*lbl,int nlbl,const unsigned char*subs,int nsubs,unsigned char*vars) {
  static const char*const stdvars[256]={
    [0]="Class","Temperature","Shape",
    [4]="Xloc","Yloc","Dir","Image","Inertia","Misc1","Misc2","Misc3","Misc4","Misc5","Misc6","Misc7",
    [16]="Arrived","Departed","Arrivals","Departures",
    [32]="Busy","Invisible","UserSignal","UserState","KeyCleared","IsPlayer","Destroyed","Stealthy","VisualOnly",
    [32]="Busy","Invisible","UserSignal","UserState","KeyCleared","Player","Destroyed","Stealthy","VisualOnly",
    [48]="Msg","From","Arg1","Arg2",
    [64]="Density","Volume","Strength","Weight","Distance","Height","Climb",
    [72]="Hard","Hard","Hard","Hard","Sharp","Sharp","Sharp","Sharp","ShapeDir","ShapeDir","ShapeDir","ShapeDir",
    [84]="Shovable",
  };
  static const char*const direction[16]={"E","NE","N","NW","W","SW","S","SE","F","LF","L","LB","B","RB","R","RF"};
  int flowblock[64];