Free Hero Mesh

    an->step[an->lstep].start=a0;
    an->step[an->lstep].end=a1;
    an->step[an->lstep].speed=t;
    an->ltime=0;
    an->status=ANISTAT_VISUAL|ANISTAT_LOGICAL;
    an->count++;
  } else if(an->lstep==an->vstep) {
    if(an->status&ANISTAT_LOGICAL) an->status=0;
  } else if(an->status&ANISTAT_LOGICAL) {
    an->lstep=(an->lstep?:max_animation)-1;
    an->status&=~ANISTAT_LOGICAL;
  }
}

static void animate_sync(Uint32 n,Uint32 sl,Uint32 a0) {