// Hyperbolic Rogue

// namespaces for complex features (whirlwind, whirlpool, elec, princess, clearing, 
// mirror, hive, heat + livecaves, etc.)

// Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details

namespace hr {

namespace whirlwind {

  int fzebra3(cell *c) {
    if(archimedean) return 0;
    if(euclid) {
      if(fulltorus) return 0;
      int x, y;
      tie(x,y) = cell_to_pair(c);
      return 1+((((signed short)(y)+int(50000))/3)%3);
      }
    if(S7 == 5) return getHemisphere(c, 0) > 0 ? 1 : 2;
    if(S7 < 5) {
      int d = celldistance(currentmap->gamestart(), c);
      if(d == 0) return 0;
      if(S7 == 4 && d == 3) return 0;
      if(S7 == 3 && d == 2 && !ctof(c)) return 0;
      return 1;
      }
    return zebra3(c);
    }

  void switchTreasure(cell *c) {
    c->item = itNone;
    if(safety) return;
    if(hrand(5000) < PT(100 + 2 * (kills[moAirElemental] + kills[moWindCrow]), 200) && notDippingFor(itWindstone)
      && (!shmup::on || getGhostcount() < 2))
      c->item = itWindstone;
    else if(hrand(5000) < 20*PRIZEMUL)
      placeLocalOrbs(c);
    }

  int cat(cell *c) {
    if(c->land != laWhirlwind) return 0;
    if(c->wall != waNone && c->wall != waChasm && 
      c->wall != waSea && !isAlchAny(c) &&
      c->wall != waMineMine && c->wall != waFire) return 0;
    if(c->item == itKey || c->item == itOrbYendor) return 0;
    if(airdist(c) < 3) return 0;
    if(c->monst == moHexSnake || c->monst == moHexSnakeTail) return 0;
    return fzebra3(c);
    }
  
  cell *where;
  int dfrom[2], dto[2], qdirs;
  
  int gdist(int d, int e) { return dirdiff(d-e, where->type); }
  
  void calcdirs(cell *c) {
    where = c;
    int d = cat(c);
    qdirs = 0;
    if(d == 0) return;
    int qdf = 0, qdt = 0;
    int cats[MAX_EDGE];
    for(int i=0; i<c->type; i++) 
      cats[i] = cat(createMov(c,i));
    for(int i=0; i<c->type; i++)
      if(cats[i] == d) {
        bool c1 = (cats[(i+1)%c->type] != d);
        bool c2 = (cats[(i+c->type-1)%c->type] != d);
        if(c1 && !c2) dto[qdt++] = i;
        if(c2 && !c1) dfrom[qdf++] = i;
        }
    qdirs = qdf;
    if(qdirs == 2) {
      int cur = gdist(dfrom[0], dto[0]) + gdist(dfrom[1], dto[1]);
      int alt = gdist(dfrom[0], dto[1]) + gdist(dfrom[1], dto[0]);
      if(alt < cur) swap(dto[0], dto[1]);
      }
    }

  int mindist(int d, int *tab) {
    if(qdirs == 0) return NODIR;
    if(qdirs == 1) return gdist(d, tab[0]);
    return min(gdist(d, tab[0]), gdist(d, tab[1]));
    }

  int winddir(int d) {
    if(d == -1) return 0;
    int mdf = mindist(d, dfrom);
    int mdt = mindist(d, dto);
    // printf("dir = %d mdf = %d mdt = %d\n", d, mdf, mdt);
    if(mdf < mdt) return -1;
    if(mdf > mdt) return 1;
    return 0;
    }
  
  void build(vector<cell*>& whirlline, int d) {
    again: 
    cell *at = whirlline[isize(whirlline)-1];
    cell *prev = whirlline[isize(whirlline)-2];
    for(int i=0; i<at->type; i++) 
      if(at->move(i) && (euclid || at->move(i)->master->alt) && celldistAlt(at->move(i)) == d && at->move(i) != prev) {
        whirlline.push_back(at->move(i));
        goto again;
        }
    }
  
  void moveAt(cell *c, manual_celllister& cl) {
    if(cl.listed(c)) return;
    calcdirs(c);
    if(qdirs != 1) return;
    vector<cell*> whirlline;
    whirlline.push_back(c);
    cell *prev = c;
    cell *c2 = c->move(dfrom[0]);
    while(true) {
      // printf("c = %p dist = %d\n", c2, c2->mpdist);
      if(c == c2) break;
      calcdirs(c2);
      if(qdirs == 0) break;
      cell *cc2 = c2;
      if(qdirs == 1) whirlline.push_back(c2), c2 = c2->move(dfrom[0]);
      else if(c2->move(dto[0]) == prev) 
        c2 = c2->move(dfrom[1]);
      else
        c2 = c2->move(dfrom[0]);
      prev = cc2;
      }
    int z = isize(whirlline);
    // printf("Cycle built from %p, length = %d\n", c, z);
    for(int i=0; i<z; i++) {
      // printf("%d%c", whirlline[i]->mpdist, whirlline[i]->item ? '*' : ' ');
      cl.add(whirlline[i]);
      if(whirlline[i]->mpdist == BARLEV)
        switchTreasure(whirlline[i]);
      }
    for(int i=0; i<z-1; i++) {
      moveItem(whirlline[i], whirlline[i+1], true);
      if(whirlline[i]->item)
        animateMovement(whirlline[i+1], whirlline[i], LAYER_BOAT, NOHINT);
      }
    for(int i=0; i<z; i++) 
      pickupMovedItems(whirlline[i]);
    }
  
  void move() {
    manual_celllister cl;
    for(int i=0; i<isize(dcal); i++) {
      cell *c = dcal[i];
      moveAt(c, cl);
      }
    // Keys and Orbs of Yendor always move
    using namespace yendor;
    for(int i=0; i<isize(yi); i++) {
      moveAt(yi[i].path[0], cl);
      moveAt(yi[i].key(), cl);
      }
    }
  
  cell *jumpFromWhereTo(cell *c, bool player) {
    for(int i=0; i<2; i++) {
      calcdirs(c);
      if(qdirs != 1) return NULL;
      cell *c2 = c->move(dfrom[0]);
      if(!passable(c, c2, P_JUMP1)) return NULL;
      if(player && i == 0 && !passable(c, c2, P_ISPLAYER)) return NULL;
      c = c2;
      }
    calcdirs(c);
    if(qdirs != 1) return NULL;
    return c;
    }

  cell *jumpDestination(cell *c) {
    for(int i=0; i<2; i++) {
      calcdirs(c);
      if(qdirs != 1) return NULL;
      c = c->move(dto[0]);
      }
    calcdirs(c);
    if(qdirs != 1) return NULL;
    return c;
    }
  }

namespace elec { 

  bool havecharge, haveelec, havethunder;
  bool afterOrb; // extra charge from the Orb of Lightning

  enum eCharge {
    ecCharged, ecGrounded, ecIsolator, ecConductor
    };
  
  bool conduct(eCharge cf, eCharge ct) {
    if(ct == ecIsolator) return false;
    if(ct == ecConductor) return true;
    return ct != cf;
    }
  
  eCharge getCharge(cell *c) {
    bool ao = afterOrb && c->ligon;
    
    if(c->wall == waCharged) return ecCharged;
    if(c->wall == waSea || c->wall == waGrounded) return ecGrounded;
    if(c->wall == waSandstone || c->wall == waDeadTroll || 
      c->wall == waDeadTroll2 || 
      c->wall == waVinePlant ||
      c->wall == waMetal || isAlchAny(c)) 
        return c->land == laStorms ? ecConductor : ecGrounded; 
    if(c->wall == waBarrier)
      return ecIsolator;
    if(c->wall == waChasm)
      return ecIsolator;

    if(shmup::on ? isPlayerOn(c) : (isPlayerOn(c) || stalemate::isMoveto(c) || (items[itOrbEmpathy] && isFriendly(c)))) {
      if(items[itOrbShield]) return ecIsolator;
      if(afterOrb) return ecIsolator;
      if(!items[itOrbAether]) return c->land == laStorms ? ecConductor : ecGrounded;
      }
    
    // if(c->monst && stalemate::moveto) printf("%p: isKilled = %d\n", c, stalemate::isKilled(c));

    else if(
      (c->monst || stalemate::isPushto(c))
      && 
      (stalemate::isPushto(c) || !stalemate::isKilled(c)) 
      && 
      c->monst != moGhost && c->monst != moIvyDead && c->monst != moIvyNext 
      && !(isDragon(c->monst) && !c->hitpoints)
      )
      return c->land == laStorms ? (ao ? ecCharged : ecConductor) : ecGrounded;

    if(c->land != laStorms)
      return ecGrounded;

    if(ao) return ecCharged;

    return ecIsolator;
    }
  
  // To process conductivity, consider the following graph:
  
  // - edges are between conductors and adjacent charged/grounded/conductor cells
  // - all charged cells are connected to one special cell '0'
  // - all grounded cells are connected to one special cell '1'
  // - cells '0' and '1' are connected
  
  // If A and B are in the same biconnected component, then there is a closed circuit,
  // consisting of all other cells in that component. 
  
  // To find biconnected components, we are using the Hopcroft-Tarjan algorithm.
  
  struct chargedata {
    cell *c;
    int otmp;
    int lowlink;
    bool instack;
    bool fire;
    };
  
  vector<chargedata> charges;
  
  vector<pair<int, int> > xstack;
  
  vector<cell*> chargecells;
  
  bool hasdata(cell *c) {
    return c->listindex >= 0 && c->listindex < isize(charges) && charges[c->listindex].c == c;
    }
  
  void connect(int from, cell *c) {
    if(hasdata(c)) {
      // seen again: set the lowlink
      if(!charges[c->listindex].instack) return;
      // printf("edge %d-%d\n", from, c->listindex);
      if(c->listindex < charges[from].lowlink)
        charges[from].lowlink = c->listindex;
      }
    else {
      int id = isize(charges);
      charges.push_back(chargedata());

      {chargedata& ch(charges[id]);
      ch.c = c; ch.otmp = c->listindex; ch.lowlink = id; c->listindex = id;
      ch.instack = true; ch.fire = false;
      }
      // c->landparam = id;
      
      // printf("edge %d-%d [%s]\n", from, id, dnameof(c->wall));
      
      xstack.push_back(make_pair(from, id));
      
      eCharge chh = getCharge(c);
      
      if(chh == ecGrounded) {
        xstack.push_back(make_pair(id, 0));
        charges[id].lowlink = 0;
        }
      else if(chh == ecCharged) {
        xstack.push_back(make_pair(id, 1));
        if(from != 1) charges[id].lowlink = 1;
        }
      
      for(int i=0; i<c->type; i++) {
        cell *c2 = c->move(i);
        if(!c2) continue;
        if(c2->listindex == from) continue;
        eCharge ct = getCharge(c2);
        if(conduct(chh, ct))
          connect(id, c2);
        }
      
      // printf("lowlink of %d [%s] = %d\n", id, dnameof(c->wall), ch.lowlink);
      if(charges[id].lowlink < charges[from].lowlink)
        charges[from].lowlink = charges[id].lowlink;
  
      if(charges[id].lowlink >= from) {
        while(xstack.back().first != from || xstack.back().second != id) {
          // printf("bcc %d,%d\n", xstack.back().first, xstack.back().second);
          xstack.pop_back();
          }
        // printf("bcc %d,%d\n", xstack.back().first, xstack.back().second);
        xstack.pop_back();
        // printf("\n");
        }
      
      charges[id].instack = false;
      }
    }
  
  void affect(cell *c) {
    c->ligon = true;
    if(c->monst) {
      if(c->monst == moMetalBeast2 && !c->item)
        c->item = itFulgurite;
      killMonster(c, moLightningBolt);
      }
    if(isPlayerOn(c)) {
      killThePlayerAt(moLightningBolt, c, 0);
      }
    if(c->wall == waSandstone)
      c->wall = waNone, c->item = itFulgurite,
      drawParticles(c, winf[waSandstone].color, 16);
    if(c->wall == waDeadTroll) c->wall = waCavefloor;
    if(c->wall == waDeadTroll2 || isAlchAny(c) || c->wall == waVinePlant)
      drawParticles(c, winf[c->wall].color, 16),
      c->wall = waNone;
    /* if(c->wall == waCharged)
      c->wall = waMetal; */
    }
  
  void listChargedCells(cell *c, manual_celllister& cl, eCharge last = ecConductor) {
    if(cl.listed(c)) return;
    eCharge here = getCharge(c);
    /* if(c->cpdist <= 2) {
      printf("monst=%s ", dnameof(c->monst));
      printf("wall=%s ", dnameof(c->wall));
      printf("c=%p here=%d last=%d\n", c, here, last);
      } */
    if(here == ecIsolator) cl.add(c);
    if(!conduct(last, here)) return;
    if(here == ecCharged) chargecells.push_back(c);
    cl.add(c);
    for(int i=0; i<c->type; i++) {
      cell *c2 = c->move(i);
      if(c2) listChargedCells(c2, cl, here);
      }
    }
  
  void init() {
    chargecells.clear();
    if(!haveelec && !afterOrb) return;
    if(1) {
      manual_celllister cl;
      for(int i=0; i<isize(dcal); i++) listChargedCells(dcal[i], cl);
      }
    
    charges.resize(2); 
    charges[0].lowlink = 0; charges[1].lowlink = 1;
    if(!havecharge) return;
    
    xstack.clear();
    
    for(int i=0; i<isize(chargecells); i++) 
      connect(1, chargecells[i]);
  
    havethunder = charges[1].lowlink == 0;
    if(havethunder) {
      for(int i=0; i<isize(xstack); i++) { 
        int k = xstack[i].first;
        int l = xstack[i].second;
        // printf("connected %d-%d\n", k, l);
        charges[k].fire = true;
        charges[l].fire = true;
        }
      }
    }
  
  void fire() {
    if(havethunder) {
      addMessage(XLAT("There is a flash of thunder!"));
      playSound(NULL, "storm");
      drawLightning();
      for(int i=2; i<isize(charges); i++) if(charges[i].fire)
        affect(charges[i].c);
      }
    }
  
  void cleanup() {
    for(int i=2; i<isize(charges); i++) 
      charges[i].c->listindex = charges[i].otmp;
    charges.resize(0); 
    }
  
  void draw(cell *c, eCharge what) {
    if(c->ligon) return;
    c->ligon = true;
    for(int i=0; i<c->type; i++) {
      cell *c2 = c->move(i);
      if(!c2) continue;
      eCharge ch = getCharge(c2);
      if(conduct(what, ch))
        draw(c2, ch);
      }
    }
  
  void drawcharges() {
    for(int i=0; i<isize(dcal); i++) 
      if(getCharge(dcal[i]) == ecCharged)
        draw(dcal[i], ecCharged);
    }
  
  bool affected(cell *c) {
    if(c->listindex >= 0 && c->listindex < isize(charges) && charges[c->listindex].c == c) 
      return charges[c->listindex].fire;
    return false;
    }
  
  struct builder {
    builder() { init(); }
    ~builder() { cleanup(); }
    };

  void act() {
    int k = tkills();
    for(int i=0; i<numplayers(); i++)
      if(multi::playerActive(i) && playerpos(i)->land == laStorms && !afterOrb) 
        markOrb(itOrbShield), markOrb(itOrbAether);
    builder b;
    fire();
    if(!afterOrb)
      achievement_count("ELEC", tkills() - k, 0);
    }
  
  // 0 = no close escape, 1 = close escape, 2 = message already shown
  int lightningfast;
  void checklightningfast() {
    if(lightningfast == 1) {
      addMessage(XLAT("Wow! That was close."));
      lightningfast = 2;
      }
    if(lightningfast > 1) return;
    builder b; 
    for(int i=0; i<numplayers(); i++)
      if(multi::playerActive(i) && elec::affected(playerpos(i))) 
        lightningfast = 1;
    }

  
  };

namespace princess {

  bool generating = false;
  bool challenge = false;
  bool saved = false;
  bool everSaved = false;
  
  bool forceVizier = false;
  bool forceMouse = false;
  bool gotoPrincess = false;
  bool nodungeon = false;
  bool squeaked = false;

  int saveHP = 0, saveArmedHP = 0;
  
  int reviveAt;
  
  vector<info*> infos;
  
  void assign(info *i) {
    if(i->alt) i->alt->emeraldval = i->id;
    }
  
  int newInfo(cell *c) {
    info *i = new info;
    i->prison = c;
    i->princess = c;
    i->alt = c->master->alt;
    i->id = isize(infos);
    i->bestdist = 0;
    i->bestnear = OUT_OF_PRISON;
    infos.push_back(i);
    assign(i);
    return i->id;
    }
  
  void newFakeInfo(cell *c) {
    info *i = new info;
    i->prison = NULL;
    i->princess = c;
    i->alt = NULL;
    i->id = isize(infos);
    i->bestdist = items[itSavedPrincess] ? OUT_OF_PALACE : OUT_OF_PRISON;
    i->bestnear = 0;
    infos.push_back(i);
    assign(i);
    }
  
  info *getPrisonInfo(cell *c) {
    if(euclid || quotient || sphere) return NULL;
    if(c->land != laPalace) return NULL;
    if(!c->master->alt) return NULL;
    int ev = c->master->alt->alt->emeraldval; // NEWYEARFIX
    if(ev < 0 || ev >= isize(infos)) return NULL;
    if(infos[ev]->alt != c->master->alt->alt) return NULL;
    return infos[ev];
    }
  
  info *getPrincessInfo(cell *c) {
    for(int i=0; i<isize(infos); i++) if(infos[i]->princess == c) {
      while(i) {
        infos[i]->id = i-1; assign(infos[i]);
        infos[i-1]->id = i; assign(infos[i-1]);
        swap(infos[i], infos[i-1]);
        i--;
        }
      return infos[i];
      }
    return NULL;
    }

  int dist(cell *c) {
    if(c->land != laPalace && c->land != laDungeon) return OUT_OF_PALACE;
    else if(quotient || sphere || fulltorus) return OUT_OF_PRISON;
    else if(euclid) return celldistAlt(c);
    else if(!c->master->alt) return OUT_OF_PRISON;
    else return celldistAlt(c);
    }
  
  void clear() {
    for(int i=0; i<isize(infos); i++) delete infos[i];
    infos.clear();
    }
 
  bool bringBackAt(cell *c) {
    if(!c) return false;
    if(!passable(c, NULL, 0)) return false;
    c->monst = moPrincessArmed;
    c->stuntime = 0;
    c->hitpoints = palaceHP();
    drawFlash(c);
    playSound(c, princessgender() ? "heal-princess" : "heal-prince");

    info *inf = NULL;
    for(int i=0; i<isize(infos); i++) {
      if(infos[i]->princess && infos[i]->bestdist == OUT_OF_PALACE && isPrincess(infos[i]->princess->monst))
        inf = infos[i];
      }
    if(inf) { inf->princess->monst = moNone; inf->princess = c; }
    else newFakeInfo(c);
    return true;
    }

  void bringBack() {
    if(bringBackAt(cwt.peek())) return;
    for(int i=1; i<isize(dcal); i++)
      if(bringBackAt(dcal[i])) return;
    }
  
  void setdist(info *i, int newdist) {
    if(newdist < ALTDIST_ERROR && newdist > i->bestdist) {
      i->bestdist = newdist;
//    printf("Improved dist to %d\n", newdist);
      if(newdist == OUT_OF_PALACE) {
        if(!princess::saved)
#if CAP_INV
        if(!inv::on || !inv::usedForbidden)
#endif
          achievement_gain("PRINCESS1");
        princess::saved = true;
        princess::everSaved = true;
        if(inv::on && !princess::reviveAt)
          princess::reviveAt = gold(NO_LOVE);
        items[itSavedPrincess]++;
        }
      if(newdist == OUT_OF_PRISON && princess::challenge) {
        addMessage(XLAT("Congratulations! Your score is %1.", its(i->value)));
        achievement_gain("PRINCESS2");
        if(!cheater) achievement_score(36, i->value);
        showMissionScreen();
        }
      }
    if(i->princess->land == laDungeon && !saved && !nodungeon) {
      addMessage(XLAT("%The1 says, \"not this place, it looks even worse...\"", moPrincess));
      nodungeon = true;
      }
    }

  void save(cell *princess) {
    if(euclid) return;
    princess::info *i = princess::getPrincessInfo(princess);
    if(!i || i->bestdist <= 3) princess->monst = moNone;
    else if(i) setdist(i, OUT_OF_PRISON);
    }

  void move(cell *ct, cell *cf) {
    if(euclid) return;
    princess::info *i = princess::getPrincessInfo(cf);
    if(!i) {
      // note: OK if mapediting or loading
      printf("Warning: unknown princess\n"); 
      if(!cheater) 
        addMessage("Warning: unknown princess (that's a bug, please report)");
      }
    else {
      i->princess = ct;
      setdist(i, dist(ct));
      // printf("newdist = %d (vs %d)\n", newdist, i->bestdist);
      }
    }

  void mouseSqueak(cell *c) {
    eMonster m = c->monst;
    info *i = getPrisonInfo(c);
    int d = dist(c);

    playSound(c, "mousesqueak", 40);
    if(!i)
       addMessage(XLAT("%The1 squeaks in a confused way.", m));
    else if(i->bestdist >= 6)
       addMessage(XLAT("%The1 squeaks gratefully!", m));
    else if(!i->princess)
       addMessage(XLAT("%The1 squeaks hopelessly.", m));
    else if(d > 120)
       addMessage(XLAT("%The1 squeaks in despair.", m));
    else if(d > 90)
       addMessage(XLAT("%The1 squeaks sadly.", m));
    else if(d > 60)
       addMessage(XLAT("%The1 squeaks with hope!", m));
    else if(d > 30)
       addMessage(XLAT("%The1 squeaks happily!", m));
    else
       addMessage(XLAT("%The1 squeaks excitedly!", m));
    }
  
  void line(cell *c) {
    int d = (euclid || c->master->alt) ? celldistAlt(c) : 200;
    eMonster m = c->monst;
  
    static int msgid = 0;
  
    playSound(c, princessgender() ? "speak-princess" : "speak-prince");
    retry:
    if(msgid >= 127) msgid = 0;  
    
    bool inpalace = c->land == laPalace || c->land == laDungeon;
    
    if(msgid == 0 && d < 20 && inpalace) {
      addMessage(XLAT("%The1 kisses you, and begs you to bring %him1 away from here.", m));
      }
    else if(msgid == 1 && d >= 20 && inpalace && !peace::on) {
      if(m == moPrincess)
        addMessage(XLAT("\"I want my revenge. Stun a guard and leave him for me!\"", m));
      else
        addMessage(XLAT("\"That felt great. Thanks!\"", m));
      }
    else if(msgid  == 2 && d >= 70 && inpalace) {
      addMessage(XLAT("\"Bring me out of here please!\"", m));
      }
    else if(msgid == 3 && !inpalace) {
      addMessage(XLAT("%The1 kisses you, and thanks you for saving %him1.", m));
      }
    else if(msgid == 4 && !inpalace && m == moPrincess && !peace::on) {
      addMessage(XLAT("\"I have been trained to fight with a Hypersian scimitar, you know?\"", m));
      }
    else if(msgid == 16 && !inpalace) {
      addMessage(XLAT("\"I would love to come to your world with you!\"", m));
      }
    else if(msgid == 20 && !inpalace) {
      addMessage(XLAT("\"I do not like butterflies. They are treacherous.\"", m));
      }
    else if(msgid == 32 && !inpalace) {
      addMessage(XLAT("\"Straight lines stay close to each other forever, this is so romantic!\"", m));
      }
    else if(msgid == 40 && !inpalace) {
      addMessage(XLAT("\"I hate roses.\"", m));
      }
    else if(msgid == 48 && !inpalace) {
      addMessage(XLAT("\"Maps... Just like the world, but smaller... how is that even possible?!\"", m));
      }    
    else if(msgid == 64) {
      addMessage(XLAT("\"In this world there is plenty of space for everyone. We do not need wars.\"", m));
      }    
    else if(msgid == 65) {
      addMessage(XLAT("\"Only the stupid hyperbugs do not understand this.\"", m));
      }    
    else if(msgid == 72 && !inpalace) {
      addMessage(XLAT("\"I have once talked to a Yendorian researcher... he was only interested in infinite trees.\"", m));
      }
    else if(msgid == 73 && !inpalace) {
      addMessage(XLAT("\"Infinite trees are boring. I prefer other graphs.\"", m));
      }
    else if(msgid == 74 && !inpalace) {
      addMessage(XLAT("\"Did you know that the Cultists are relatives of the Desert Men?\"", m));
      }
    else if(msgid == 80) {
      addMessage(XLAT("\"Are there Temples of Cthulhu in your world? Why not?\"", m));
      }    
    else {
      msgid++; goto retry;
      }
  
    msgid++;
    }

  void playernear(cell *c) {
    info *i = getPrisonInfo(c);
    int d = dist(c);
    // if(i) printf("d=%d bn=%d\n", d, i->bestnear);
    if(i && d < i->bestnear) {
      if(i->bestnear > 100 && d <= 100) {
        i->value = items[itPalace];
        if(princess::challenge) 
          addMessage(XLAT("Hardness frozen at %1.", its(i->value)));
        }
      i->bestnear = d;
      }
    }
    
  }

namespace clearing {

  bool buggyplant = false;
  
  std::map<heptagon*, clearingdata> bpdata;
  
  cell *current_root;
  
  void new_root() {
    if(!current_root || current_root->monst != moMutant) {
      auto& ac = currentmap->allcells();
      int iter = 0;
      while(!current_root || pseudohept(current_root) || current_root->cpdist < 3) {
        if(iter++ > 100) return;
        current_root = ac[hrand(isize(ac))];
        }
      current_root->monst = moMutant;
      current_root->mondir = NODIR;
      current_root->stuntime = (mutantphase + 1) & 15;
      }
    }
  
  int plantdir(cell *c) {
    if(!quotient) {
      generateAlts(c->master);
      for(int i=0; i<S7; i++)
        generateAlts(c->master->move(i));
      }
    int d = celldistAlt(c);
    
    if(PURE) {
      for(int i=0; i<S7; i++) {
        cell *c2 = createMov(c, i);
        if(!pseudohept(c2) && celldistAlt(c2) == d-1)
          return i;
        }
      for(int i=0; i<S7; i++) {
        cell *c2 = createMov(c, i);
        if(celldistAlt(c2) == d-1)
          return (i+1) % S7;
        }
      }

    for(int i=1; i<S6; i+=2) {
      cell *c2 = createMov(c, i);
      if(celldistAlt(c2) == d-1)
        return i;
      }

    int quseful = 0, tuseful = 0, tuseful2 = 0;
    for(int i=1; i<S6; i+=2) {
      cell *c2 = c->move(i);
      if(celldistAlt(c2) == d) {
        bool useful = false;
        for(int j=1; j<S6; j++) {
          cell *c3 = createMov(c2, j);
          if(celldistAlt(c3) == d-1)
            useful = true;
          }
        if(useful) quseful++, tuseful += (1<<i), tuseful2 = i;
        }
      }
    if(quseful == 1) return tuseful2;
    if(quseful == 2) {
      int i;
      if(tuseful == (1<<3)+(1<<5)) i = 3;
      if(tuseful == (1<<5)+(1<<1)) i = 5;
      if(tuseful == (1<<1)+(1<<3)) i = 1;
      if(tuseful == (1<<5)+(1<<7)) i = 5;
      if(tuseful == (1<<7)+(1<<1)) i = 7;
      if((d & 7) < 4) i = (i+2) % S6;
      return i;
      }
    printf("error in plantdir\n");
    return 1;
    }

  vector<cell*> onpath;
  vector<int>   pdir;
  vector<cell*> rpath;
    
  void generate(cell *c) {
    if(buggyplant) return;    
    if(sphere) return;    
    if(NONSTDVAR) return;
    if(quotient) return;
    
    if(euclid) {
      if(euwrap) return; // fix cylinder
      if(pseudohept(c)) return;
      c->monst = moMutant;
      
      int x, y;
      tie(x,y) = cell_to_pair(c);

      int xco = x * 2 + y + 1;
      c->stuntime = (8-xco/2) & 15;
      // 2, 4, 5, 7
      
      if(pseudohept(createMov(c, 0)))
        c->mondir = 1 + hrand(2) * 4;
      else
        c->mondir = 0;
      return;
      }
    
    // cell *oc = c;
    if(!euclid) generateAlts(c->master);
    if(pseudohept(c)) return;
    heptagon *a = euclid ? NULL : c->master->alt->alt;
    clearingdata& bd(bpdata[a]);
    if(!bd.root) { bd.root = c; bd.dist = 8; }
    
    onpath.clear(); pdir.clear(); rpath.clear();
    
    int steps = 0;
    
    int ds;
    
    int stepcount = 0;
    while(true) {
      if(c == bd.root) {ds = bd.dist; break; }

      // printf("R %4d C %4d\n", celldistAlt(bd.root), celldistAlt(c));
      if(celldistAlt(c) > celldistAlt(bd.root)) {
        stepcount++;
        if(stepcount > 1000) {
          printf("buggy #1\n");
          return;
          }

        if(c->mpdist <= 6) {
          if(c->monst != moMutant) return; // already cut!
          // ... else simply extend it
          ds = c->stuntime; break;
          }

        int d = plantdir(c);
        steps++;
        onpath.push_back(c); pdir.push_back(d);
        // printf("c [%4d] %p -> %p\n", celldistAlt(c), c, c->move(d));
        c = c->move(d);
        }
      else {
        bd.dist--;
        if(bd.dist < -1000) { 
          for(int i=0; i<steps; i++) 
            onpath[i]->item = itBuggy;
          for(int i=0; i<(int) rpath.size(); i++) 
            rpath[i]->item = itBuggy;
          buggyplant = true;
          printf("buggygen\n");
          return;
          }
        rpath.push_back(bd.root);
        // printf("r [%4d] %p -> %p\n", celldistAlt(bd.root), bd.root, bd.root->move(plantdir(bd.root)));
        bd.root = createMov(bd.root, plantdir(bd.root));
        }
      }
    
    // printf("steps = %d dist = %d [%d]\n", steps, bd.dist, oc->mpdist);
    
    onpath.push_back(c); pdir.push_back(plantdir(c));
    while(steps >= 0) {
      c = onpath[steps];
      if(steps == 0) {
        c->monst = moMutant;
        c->mondir = pdir[steps];
        if(pdir[steps] != plantdir(c)) {
          printf("pdir i/ plantdir\n");
          exit(1);
          }
        c->stuntime = ds;
        }
      if(c->mpdist <= 7 && c->monst != moMutant)
        break;
      steps--; ds++;
      }
    }
  }

namespace whirlpool {

  bool escaped = false; // escaped the Whirlpool?

  // next == +1 -> next
  // next == -1 -> prev
  cell *get(cell *c, int next) {
    int i = 0;
    if(!eubinary && !c->master->alt) return NULL;
    int d = celldistAlt(c);
    int d2;
    while(true) {
      if(i == c->type) return NULL;
      if(c->move(i) && (d2 = celldistAlt(c->move(i))) != d)
        break;
      i++;
      }
    if(i == c->type) return NULL;
    if(d>d2) next = -next;
    for(int j=1; j<c->type; j++) {
      cell *c2 = c->modmove(i+next*j);
      if(celldistAlt(c2) == d) return c2;
      }
    return NULL;
    }
  
  void build(vector<cell*>& whirlline, int d) {
    again: 
    cell *at = whirlline[isize(whirlline)-1];
    cell *prev = whirlline[isize(whirlline)-2];
    for(int i=0; i<at->type; i++) 
      if(at->move(i) && (eubinary || at->move(i)->master->alt) && celldistAlt(at->move(i)) == d && at->move(i) != prev) {
        if(at->move(i) == whirlline[0]) return; // loops in weird geometries?
        if(at->move(i) == whirlline[isize(whirlline)/2]) return; // even weirder geometry?
        whirlline.push_back(at->move(i));
        goto again;
        }
    }
  
  void generate(cell *wto) {
    if(wto->wall == waBoat || wto->monst)
      return;
    
    wto->wall = waSea;
    
    if(hrand(35000) < 40 + items[itWhirlpool] + yendor::hardness())
      wto->monst = moCShark;
    else if(hrand(5000) < 500)
       wto->wall = waBoat;
    
    if(wto->wall == waBoat && (eubinary || wto->master->alt)) { 
      int d = celldistAlt(wto);
      if(yendor::on) d -= 200;
      // 250 : hard
      if(hrand(5000) < 60 + 3 * items[itWhirlpool] + yendor::hardness())
        wto->monst = moPirate;
      if(hrand(5000) < 20 && d < -20 && !tactic::on && !inv::on)
        wto->item = itOrbSafety;
      else if(hrand(5000) < 20 && d < -20 && !tactic::on && markOrb(itOrbLuck))
        wto->item = itOrbSafety;
      else if(hrand(5000) < 20*PRIZEMUL && d < -20)
        placePrizeOrb(wto);
      else if(!inv::on && items[itWhirlpool] >= 10 && hrand(5000) < 20 && d < -15)
        wto->item = itOrbWater;
      else if(d<-10 && hrand(5000) < 1000-d)
        wto->item = itWhirlpool;
      }
    }
  
  void whirlMove(cell *wto, cell *wfrom) {
    // monsters don't move
    if(wfrom && (isPlayerOn(wfrom) || wfrom->monst))
      return;
    // disappear
    if(!wto) { wfrom->wall = waSea; wfrom->item = itNone; }
    
    if(wfrom && wto && wfrom->wall == waBoat && wto->wall == waSea && !wto->monst) {
      wfrom->wall = waSea; wto->wall = waBoat;
      wto->mondir = neighborId(wto, wfrom);
      animateMovement(wfrom, wto, LAYER_BOAT, NOHINT);
      }
    
    if(wfrom && wto && wfrom->item && !wto->item && wfrom->wall != waBoat) {
      // Keys and Orbs of Yendor never disappear!
      if(wfrom->item == itKey || wfrom->item == itOrbYendor)
        for(int i=0; i<wto->type; i++) createMov(wto, i);
      moveItem(wfrom, wto, false);
      pickupMovedItems(wfrom);
      pickupMovedItems(wto);
      }
    
    if(wto && !wfrom) 
      generate(wto);
    }
  
  void moveAt(cell *c, manual_celllister& cl) {
    if(c->land != laWhirlpool) return;
    if(cl.listed(c)) return;
    if(!(eubinary || c->master->alt)) return;
    cell *c2 = get(c, 1);
    if(!c2) return;
    int d = celldistAlt(c);
    vector<cell*> whirlline;
    whirlline.push_back(c);
    whirlline.push_back(c2);
    build(whirlline, d);
    reverse(whirlline.begin(), whirlline.end());
    build(whirlline, d);
    int z = isize(whirlline);
    
    for(int i=0; i<z; i++) 
      cl.add(whirlline[i]);
  
    whirlMove(NULL, whirlline[0]);
    
    for(int i=0; i<z-1; i++) 
      whirlMove(whirlline[i], whirlline[i+1]);
    
    whirlMove(whirlline[z-1], NULL);
    }
  
  void move() {
    manual_celllister cl;
    for(int i=0; i<isize(dcal); i++) {
      cell *c = dcal[i];
      moveAt(c, cl);
      }
    // Keys and Orbs of Yendor always move
    using namespace yendor;
    for(int i=0; i<isize(yi); i++) {
      moveAt(yi[i].path[0], cl);
      moveAt(yi[i].path[YDIST-1], cl);
      }
    }
  }

namespace mirror {

  bool build(cell *c) {
    #if CAP_GP
    if(GOLDBERG) {
      if(c == c->master->c7) {
        c->wall = ((gp::param.second == 0 || gp::param.first == gp::param.second) && hrand(2)) ? waMirror : waCloud;
        return true;
        }
      return false;
      }
    #endif
    #if CAP_ARCM
    if(archimedean) {
      c->wall = hrand(2) ? waMirror : waCloud;
      return true;
      }
    #endif
    if(binarytiling || IRREGULAR) {
      // mirrors not supported
      if(is_mirrorland(c)) {
        c->item = itShard;
        return true;
        }
      return false;
      }
    if(PURE?pseudohept(c):!ishept(c)) {
      c->wall = hrand(2) ? waMirror : waCloud;
      return true;
      }
    return false;
    }

  vector<pair<int, cellwalker>> mirrors;
  static const int LIGHTNING = -1; // passed instead of cpid
  
  bool noMirrorOn(cell *c) {
    return c->monst || (!shmup::on && isPlayerOn(c)) || (geometry != gFieldQuotient && geometry != gTorus && c->cpdist > gamerange());
    }

  bool cellMirrorable(cell *c) {
    if(noMirrorOn(c)) return false;
    return 
      c->wall == waNone || c->wall == waCavefloor || isAlchAny(c) ||
      c->wall == waFrozenLake || c->wall == waDeadfloor || c->wall == waDeadfloor2 ||
      c->wall == waGiantRug || c->wall == waCIsland || c->wall == waCIsland2 ||
      c->wall == waGargoyleFloor || c->wall == waRubble ||
      c->wall == waGargoyleBridge || c->wall == waTempFloor || c->wall == waTempBridge ||
      c->wall == waMirrorWall || c->wall == waPetrifiedBridge;
    }

  void destroyKilled() {
    int j = 0;
    for(int i=0; i<isize(mirrors); i++)
      if(mirrors[i].second.at->monst == moMimic)
        mirrors[j++] = mirrors[i];
    mirrors.resize(j);
    }
  
  void unlist() {
    for(auto& m: mirrors)
      if(m.second.at->monst == moMimic)
        m.second.at->monst = moNone;
    }
  
  void list() {
    for(auto& m: mirrors)
      m.second.at->monst = moMimic;
    }

  void destroyAll() {
    unlist();
    mirrors.clear();
    }
  
  void createMirror(cellwalker cw, int cpid) {
    if(!shmup::on && inmirror(cw))
      cw = reflect(cw);
    if(cpid == LIGHTNING)
      castLightningBolt(cw);
    else if(cellMirrorable(cw.at)) {
      for(auto& m: mirrors)
        if(m == make_pair(cpid,cw))
          return;
      mirrors.emplace_back(cpid, cw);
      }
    }

  #if CAP_ARCM
  // we go by heptagons in Archimedean, 
  bool equal(heptspin h1, heptspin h2, int lev) {
    if(h1.at->degree() != h2.at->degree()) return false;
    if(arcm::is_vertex(h1.at) != arcm::is_vertex(h2.at)) return false;
    if(lev) for(int i=0; i<h1.at->degree(); i++) {
      heptspin h11 = h1 + i + wstep;
      heptspin h21 = h2 + i + wstep;
      if(!equal(h11, h21, lev-1)) return false;
      }
    return true;
    }
  
  int create_archimedean_rec(heptspin hs, int cpid, heptspin hs0, int lev) {
    int result = 0;
    for(int i=0; i<hs.at->degree(); i++) {
      heptspin hs1 = hs + i;
      if(lev == 0) {
        if(hs1.at != hs0.at && equal(hs1, hs0, 3)) {
          createMirror(hs1 + cth, cpid);
          result++;
          }
        }
      else result += create_archimedean_rec(hs1 + wstep, cpid, hs0, lev-1);
      }
    return result;
    }

  void create_archimedean(cellwalker cw, int cpid, bool mirrored) {
    heptspin hs = cw + cth;
    heptspin hsx = hs;
    if(mirrored) hsx += wmirror;
    if(create_archimedean_rec(hsx, cpid, hs, 2)) return;
    if(create_archimedean_rec(hsx, cpid, hs, 3)) return;
    if(create_archimedean_rec(hsx, cpid, hs, 4)) return;
    }
  #endif
  
  void createMirrors(cellwalker cw, int cpid) {
    
    #if CAP_ARCM
    if(archimedean) {
      create_archimedean(cw, cpid, true);
      return;
      }
    #endif

    cw.mirrored = !cw.mirrored;
    cell *c = cw.at;
    
    #if CAP_GP
    if(GOLDBERG) {
      for(int i=0; i<cw.at->type; i++) {
        createMirror(cw + cth + i + wstep + i - (gp::param.first == gp::param.second ? 1 : 0) + cth, cpid);
        }
      return;
      }
    #endif
    for(int i=0; i<cw.at->type; i++) {
      auto cws = cw + wstep;
      if(cws.at->type == c->type) 
        createMirror(cws+i, cpid);
      cw += 1;
      }
    }
  
  void createMirages(cellwalker cw, int cpid) {
    #if CAP_ARCM
    if(archimedean) {
      create_archimedean(cw, cpid, false);
      return;
      }
    #endif
    #if CAP_GP
    if(GOLDBERG && !(S7 & 1)) {
      for(int i=0; i<cw.at->type; i++) {
        createMirror(cw + cth + i + wstep + 1 + wstep + 1 + (S7/2) - i + 1 + cth, cpid);
        }
      return;
      }
    if(GOLDBERG && (S7 & 1)) {
      for(int i=0; i<cw.at->type; i++) {
        createMirror(cw + cth + i + wstep + (S7/2) + wstep - 2 + wstep + (S7/2) - i + cth, cpid);
        }
      return;
      }
    #endif
    if(PURE && !(S7 & 1)) {
      for(int i=0; i<cw.at->type; i++)
        createMirror(cw + i + wstep + 1 + wstep + 1 + (S7/2) - i, cpid);
      return;
      }
    if(PURE && (S7 & 1) && (S3 == 4)) {
      for(int i=0; i<cw.at->type; i++) 
        createMirror(cw + i + wstep + 1 + wstep - (S7/2) + wstep - (S7/2) - i, cpid);
      return;
      }
    if(PURE && (S7 & 1)) {
      for(int i=0; i<cw.at->type; i++)
        createMirror(cw + i + wstep + (S7/2) + wstep - 2 + wstep + (S7/2) - i, cpid);
      return;
      }
    for(int i=0; i<S6; i++) {
      auto cw0 = cw + i + wstep;
      if(!ctof(cw0.at)) {
        createMirror(cw0 + 2 + wstep - (2+i), cpid);
        createMirror(cw0 - 2 + wstep + (2-i), cpid);
        }
      }
    }

  void createHere(cellwalker cw, int cpid) {
    if(!cw.at) return;
    if(cw.at->wall == waCloud)
      createMirages(cw, cpid);
    if(cw.at->wall == waMirror)
      createMirrors(cw, cpid);
    }
  
  void breakMirror(cellwalker cw, int pid) {
    if(!cw.at) return;
    cell *c = cw.at;
    if(c->wall == waMirror || c->wall == waCloud) {
      drawParticles(c, winf[c->wall].color, 16);
      playSound(c, "pickup-mirror", 50);
      if(pid >= 0 && (cw.at->land == laMirror || cw.at->land == laMirrorOld)) {
        dynamicval<int> d(multi::cpid, pid);
        gainShard(cw.at, c->wall == waMirror ? "The mirror shatters!" : "The cloud turns into a bunch of images!");
        }
      c->wall = waNone;
      }
    }
  
  bool isKilledByMirror(cell *c) {
    for(auto& m: mirrors) {
      cell *c1 = (m.second + wstep).at;
      if(inmirror(c1)) c1 = reflect(cellwalker(c1, 0, false)).at;
      if(c1 == c && canAttack(m.second.at, moMimic, c, c->monst, 0))
        return true;
      }
    return false;
    }
   
  void go(bool fwd) {
    int tk = tkills();
    int nummirage = 0;    
    int j = 0;
    
    for(int i=0; i<isize(mirrors); i++) {
      auto& m = mirrors[i];
      bool survive = true;
      if(m.first == multi::cpid) {
        cell *c = m.second.at;
        if(!m.second.mirrored) nummirage++;
        auto cw2 = m.second + wstep;
        if(inmirror(cw2)) cw2 = reflect(cw2);
        cell *c2 = cw2.at;
        if(c2->monst) {
          c->monst = moMimic;
          eMonster m2 = c2->monst;
          if(!peace::on && canAttack(c,moMimic,c2,m2, 0)) {
            attackMonster(c2, AF_NORMAL | AF_MSG, moMimic);
            if(!fwd) produceGhost(c2, m2, moMimic);
            sideAttack(c, m.second.spin, m2, 0);
            }
          c->monst = moNone;
          }
        if(c2->wall == waBigTree)
          c2->wall = waSmallTree;
        else if(c2->wall == waSmallTree)
          c2->wall = waNone;
        if(fwd) {
          if(noMirrorOn(c2) || !passable_for(moMimic, c2, c, P_MONSTER | P_MIRROR | P_MIRRORWALL)) {
            survive = false;
            continue;
            }
          c->monst = moMimic;
          moveMonster(c2, c, m.second.spin);
          c2->monst = moNone;
          empathyMove(c, c2, neighborId(c2, c));
          m.second = cw2;
          }
        }
      if(survive) {
        mirrors[j++] = m;
        }
      }
    mirrors.resize(j);
    achievement_count("MIRRORKILL", tkills(), tk);
    achievement_count("MIRAGE", nummirage, 0);
    }

  void act(int d, int flags) {
    destroyKilled();
    unlist();
    if(multi::players == 1) multi::cpid = 0;
    bool spinning =  
      flags & (multi::players > 1 ? SPINMULTI : SPINSINGLE);
    if(spinning && d) {
      for(auto& m: mirrors)
        if(m.first == multi::cpid)
          m.second += d;
      }
    if(flags & ATTACK)
      go(flags & GO);
    list();
    }
  
  void breakAll() {
    destroyKilled();
    unlist();
    if(numplayers() == 1)
      createHere(cwt, 0);
    else for(int i=0; i<numplayers(); i++)
      createHere(multi::player[i], i);
    for(int i=0; i<isize(mirrors); i++)
      createHere(mirrors[i].second, mirrors[i].first);
    if(numplayers() == 1)
      breakMirror(cwt, 0);
    else for(int i=0; i<numplayers(); i++)
      breakMirror(multi::player[i], i);
    for(int i=0; i<isize(mirrors); i++)
      breakMirror(mirrors[i].second, -1);
    list();
    }
  
  int mirrordir(cell *c) {
    if(c->type == 7) return c->bardir;

   int icount = 0, isum = 0;
   for(int i=0; i<6; i+=2) {
     if(createMov(c, i)->bardir == c->c.spin(i))
       icount++, isum+=i;
     }
   if(icount != 1) return -1;
   return isum;
   }
  
  pair<bool, cellwalker> traceback(vector<int>& v, cellwalker cw) {
    bool goout = false;
    for(int i=isize(v)-1; i>=0; i--) {
      if(v[i]) cw -= v[i];
      else { 
        cw += wstep;
        if(cw.at->land == laMirrorWall || cw.at->land == laMirror) goout = true;
        }
      }
    return make_pair(goout, cw);
    }
  
  int depth(cell *c) { return c->landparam & 255; }

  cellwalker reflect0(cellwalker cw) {
    int stepcount = 0;
    cellwalker cwcopy = cw;
    static vector<int> v;
    v.clear();
    while(true) {
      if(!inmirror(cw)) break;
      stepcount++; if(stepcount > 10000) {
         return cw; 
         }
      cell *c0 = (cw+wstep).at;
      int go = 0;
      if(!inmirror(c0)) go = 2;
      else if(depth(c0) && depth(c0) < depth(cw.at)) go = 1;
      if(go) {
        v.push_back(0);
        cw += wstep;
        if(go == 2) break;
        }
      else {
        v.push_back(1);
        cw += 1;
        }        
      }
    if(cw.at->land == laMirrorWall || cw.at->land == laMirrorWall2) {
      if(cw.at->type == 7) {
        while(cw.spin != cw.at->bardir) {
          cw += 1;
          v.push_back(1);
          stepcount++; if(stepcount > 10000) { printf("failhep\n"); return cw; }
          }
        if(PURE && (cw+wstep).at == cwcopy.at)
          v.pop_back();
        if(PURE && (cw+3+wstep).at->land == laMirrored && (cw+2+wstep).at->land == laMirrorWall) {
          cw += wmirror;
          auto p = traceback(v, cw);
          if(p.first) return p.second;
          cw += 2;
          v.push_back(2);
          cw += wstep;
          v.push_back(0);
          cw += 3;
          v.push_back(3);
          }
        }
      else {
        while((cw+wstep).at->type != 7) {
          cw ++;
          v.push_back(1);
          }
        int icount = 0;
        for(int i=0; i<3; i++) {
          if((cw+wstep).at->bardir == cw.at->c.spin(cw.spin))
            icount++;
          cw += 2;
          }
        if(icount >= 2) {
          cellwalker cwcopy = cw;
          for(int a=0; a<3; a++) for(int m=0; m<2; m++) {
            cellwalker cw = cwcopy;
            if(m) cw.mirrored = !cw.mirrored;
            cw += (a*2);
            auto p = traceback(v,cw);
            if(p.first) return p.second;
            }
          printf("icount >= 2 but failed\n");
          return cw;
          }
        while((cw+wstep).at->bardir != cw.at->c.spin(cw.spin)) {
          stepcount++; if(stepcount > 10000) { printf("fail2\n"); return cw; }
          cw += 2;
          v.push_back(1);
          v.push_back(1);
          }
        }
      }
    else v.pop_back();
    cw.mirrored = !cw.mirrored;
    cw = traceback(v,cw).second;
    return cw;
    }

  static const int CACHESIZE = 1<<12; // must be a power of 2
  static const int CACHEMASK = CACHESIZE-1;
    
  pair<cell*, cellwalker> cache[CACHESIZE];
  int nextcache;
  
  void clearcache() {
    for(int i=0; i<CACHESIZE; i++) cache[i].first = NULL;
    }

  cellwalker reflect(const cellwalker& cw) {
    if(!cw.at) return cw;
    if((cw.at->landparam & 255) == 0) {
      bool cando = false;
      forCellEx(c2, cw.at) if(c2->landparam & 255) cando = true;
      if(cando) buildEquidistant(cw.at);
      }
    if((cw.at->landparam & 255) == 0) return cw;
    int cid = (cw.at->landparam >> 8) & CACHEMASK;
    if(cache[cid].first != cw.at) {
      cid = nextcache++;
      nextcache &= CACHEMASK;
      cw.at->landparam &= ~ (CACHEMASK << 8);
      cw.at->landparam |= (cid << 8);
      cache[cid].first = cw.at;
      cellwalker cw0(cw.at, 0, false);
      cache[cid].second = reflect0(cw0);
      int tries = 64;
      while(inmirror(cache[cid].second.at) && tries--)
        cache[cid].second = reflect0(cache[cid].second);
      }
    cellwalker res = cache[cid].second + cw.spin;
    if(cw.mirrored) res.mirrored = !res.mirrored;
    return res;
    }

  }

namespace hive {

  int hivehard() {
    return items[itRoyalJelly] + hardness_empty();
    // 0, 5, 40, 135
    }

  eMonster randomHyperbug() {
    int h = hivehard();
    if(hrand(200) < h)
      return moBug2;
    return eMonster(moBug0 + hrand(BUGCOLORS));
    // 50: 25/25/50
    // 100: 
    }
  
  struct buginfo_t {
    cell *where;
    short dist[BUGCOLORS];
    };
  
  vector<buginfo_t> buginfo;
  
  vector<int> bugqueue[BUGCOLORS];
  vector<int> bugqueue4[BUGCOLORS];
  
  struct bugtomove_t {
    int dist, moves, index;
    bugtomove_t(int d, int m, int i) { dist=d; moves=m; index=i; }
    };
  
  bool operator < (const bugtomove_t& m1, const bugtomove_t& m2) {
    if(m1.dist != m2.dist) return m1.dist < m2.dist;
    if(m1.moves != m2.moves) return m1.moves < m2.moves;
    return false;
    }
  
  vector<bugtomove_t> bugtomove;
  vector<cell*> deadbug;
  vector<cell*> bugcellq;
  
  int bugcount[BUGCOLORS];
  
  bool isBugEnemy(cell *c, int k) {
    if(isPlayerOn(c) && !invismove) return true;
    if(!c->monst) return false;
    if(c->monst == moBug0+k) return false;
    if(isIvy(c)) return false;
    return true;
    }
  
  // list bugs and targets for each color
  #define BUGINF 29999
  
  void bugQueueInsert(int k, int i, int d) {
    if(buginfo[i].dist[k] > d) {
      if(buginfo[i].dist[k] != BUGINF) {
        printf("%d -> %d\n", buginfo[i].dist[k], d);
        }
      buginfo[i].dist[k] = d;
      bugqueue[k].push_back(i);
      }
    }
  
  void bugcell(cell *c) {
    int& i(c->listindex);
    if(i >= 0 && i < isize(buginfo) && buginfo[i].where == c)
      return;
    i = isize(buginfo);
    buginfo.resize(i+1);
    buginfo_t& b(buginfo[i]);
    b.where = c;
    for(int k=0; k<BUGCOLORS; k++) {
      b.dist[k] = BUGINF;
      bool havebug = false, haveother = false;
      for(int dir=0; dir<c->type; dir++) {
        cell *c2 = c->move(dir);
        if(c2 && isBugEnemy(c2,k) && canAttack(c,eMonster(moBug0+k),c2,c2->monst, AF_TOUGH | AF_NOSHIELD | AF_GETPLAYER)) {
          if(isBug(c2)) havebug = true;
          else haveother = true;
          }
        }
      if(havebug) bugQueueInsert(k, i, 0);
      else if(haveother) bugqueue4[k].push_back(i);
      }
  /*// bugs communicate if the distance is at most 2
    // also all nearby cells are inserted to the buginfo structure
    if(isize(buginfo) < 30000) {
      for(int dir=0; dir<c->type; dir++) {
        cell *c2 = c->move(dir);
        if(c2) {
          // if(isBug(c)) bugcellq.push_back(c2); => does not help...
          for(int t=0; t<c2->type; t++)
            if(c2->move(t) && isBug(c2->move(t)))
              bugcellq.push_back(c2), 
              bugcellq.push_back(c2->move(t));
          }
        }
      }*/
    
    // use pheromones!
    if(c->land == laHive && c->landparam > 1 && c->wall != waWaxWall) {
      c->landparam --;
      for(int dir=0; dir<c->type; dir++) {
        cell *c2 = c->move(dir);
        if(c2) {
          for(int t=0; t<c2->type; t++)
            if(c2->move(t))
              bugcellq.push_back(c2), 
              bugcellq.push_back(c2->move(t));
          }
        }
      }
    }
  
  int last_d = -1;
  
  void handleBugQueue(int k, int t) {
    int i = bugqueue[k][t];
    buginfo_t& b(buginfo[i]);
    cell *c = b.where;
    int d = b.dist[k];
    last_d = d;
    int goodmoves = 0;
    for(int dir=0; dir<c->type; dir++) {
      cell *c2 = c->move(dir);
      if(!c2) continue;
      if(c2->listindex < 0 || c2->listindex >= isize(buginfo)) continue;
      if(!passable(c, c2, P_MONSTER)) continue;
      int j = c2->listindex;
      if(buginfo[j].where != c2) continue;
      if(buginfo[j].dist[k] < d) goodmoves++;
      bugQueueInsert(k, j, d+1);
      }
    if(isBug(c) && c->monst == moBug0+k) {
      bugcount[c->monst - moBug0]++;
      bugtomove.push_back(bugtomove_t(d,goodmoves,i));
      }
    }
  
  bool fightspam(cell *c) {
    return c->cpdist >= gamerange() || 
      isMetalBeast(c->monst) || c->monst == moSkeleton ||
      isIvy(c->monst) || isMutantIvy(c->monst);
    }
  
  void movebugs() {
    buginfo.clear();
    for(int k=0; k<BUGCOLORS; k++) bugqueue[k].clear();
    for(int k=0; k<BUGCOLORS; k++) bugqueue4[k].clear();
    for(int k=0; k<BUGCOLORS; k++) bugcount[k] = 0;
    bugtomove.clear();
    deadbug.clear();
    
    int xdcs = isize(dcal); for(int i=0; i<xdcs; i++) bugcell(dcal[i]);
    for(int i=0; i<isize(bugcellq); i++) bugcell(bugcellq[i]);
    bugcellq.clear();
    
    // printf("buginfo = %d\n", isize(buginfo));
    
    for(int k=0; k<BUGCOLORS; k++) {
      int t = 0;
      last_d = -1;
      int invadist = 4 - (items[itRoyalJelly]+10) / 20;
      if(invadist<0) invadist = 0;
      for(; t<isize(bugqueue[k]) && last_d < invadist-1; t++) handleBugQueue(k, t);
      for(int u=0; u<isize(bugqueue4[k]); u++)
        bugQueueInsert(k, bugqueue4[k][u], invadist);
      bugqueue4[k].clear();
      for(; t<isize(bugqueue[k]); t++) handleBugQueue(k, t);
      }
    
    for(int k=0; k<BUGCOLORS; k++) {
      set<int> check;
      for(int t=0; t<isize(bugqueue[k]); t++) {
        if(check.count(bugqueue[k][t])) {
          printf("REPETITION! [%d]\n", t);
          }
        check.insert(bugqueue[k][t]);
        }
      }
    
    hrandom_shuffle(&bugtomove[0], isize(bugtomove));
    sort(bugtomove.begin(), bugtomove.end());
    
    int battlecount = 0;
    for(int t=0; t<isize(bugtomove); t++) {
      bugtomove_t& bm(bugtomove[t]);
      int i = bm.index;
        
      buginfo_t& b(buginfo[i]);
      cell *c = b.where;
      if(!isBug(c)) continue;
      if(c->stuntime) continue;
      eMonster m = c->monst;
      int k = (m - moBug0) % BUGCOLORS;
      int gmoves[8], q=0, bqual = -1;
      
      if(againstRose(c, NULL)) bqual = -40;
  
      for(int dir=0; dir<c->type; dir++) {
        cell *c2 = c->move(dir);
        int qual = -10;
        if(!c2) continue;
        else if(againstRose(c, c2)) qual = -50;
        else if(canAttack(c, m, c2, c2->monst, AF_GETPLAYER))
          qual = c2->monst == moDeadBug ? -60: isBugEnemy(c2,k) ? 2 : -20;
        else if(!passable(c2, c, 0)) 
          qual = passable(c2, c, P_DEADLY) ? -30 : -60;
        else if(c2->listindex < 0 || c2->listindex >= isize(buginfo)) qual = -15;
        else if(buginfo[c2->listindex].where != c2) qual = -15;
        else if(buginfo[c2->listindex].dist[k] < b.dist[k])
          qual = 1;
        else if(buginfo[c2->listindex].dist[k] == b.dist[k])
          qual = 0;
        // printf("%d->#%d %d: %d\n", i, dir, c2->tmp, qual);
        if(qual > bqual) bqual = qual, q=0;
        if(qual == bqual) gmoves[q++] = dir;
        }
      
      if(!q) { if(c->land == laHive) c->landparam += 3; continue; }
      int d = gmoves[hrand(q)];
      cell *c2 = c->move(d);
      if(c2->monst || isPlayerOn(c2)) {
        eMonster killed = c2->monst;
        if(isPlayerOn(c2)) killed = moPlayer;
        if(isBug(killed)) battlecount++;
        else if(killed != moPlayer && !fightspam(c2))
          addMessage(XLAT("%The1 fights with %the2!", c->monst, killed));
        attackMonster(c2, AF_NORMAL | AF_GETPLAYER, c->monst);
        // killMonster(c);
        if(isBug(killed)) {
          c2->monst = moDeadBug, deadbug.push_back(c2);
          bugcount[killed - moBug0]--;
          }
  //    c->monst = moDeadBug, deadbug.push_back(c);
        }
      else {
        moveMonster(c2, c, d);
        // pheromones!
        if(c->land == laHive && c->landparam < 90) c->landparam += 5;
        if(c2->land == laHive && c2->landparam < 90) c2->landparam += 5;
        // if(isHive(c2->land)) c2->land = eLand(laHive0+k);
  /*      if(c2->item == itRoyalJelly && !isQueen(m)) {
          // advance!
          c2->monst = eMonster(m+BUGCOLORS);
          c2->item = itNone;
          } */
        }
      }
    
    // cleanup
    for(int i=0; i<isize(deadbug); i++) deadbug[i]->monst = moNone;
    if(battlecount)
      addMessage(XLAT("The Hyperbugs are fighting!"));
      
    int maxbug = 0;
    for(int k=0; k<BUGCOLORS; k++) if(bugcount[k] > maxbug) maxbug = bugcount[k];
    
    achievement_count("BUG", maxbug, 0);
    }
  
  void bugcitycell(cell *c, int d) {
    int& i = c->listindex;
    if(i >= 0 && i < isize(buginfo) && buginfo[i].where == c)
      return;
    i = isize(buginfo);
    buginfo_t b;
    b.where = c;
    b.dist[0] = d;
    buginfo.push_back(b);
    }
  
  void createBugArmy(cell *c) {
    int k = randomHyperbug() - moBug0;
    int minbugs = 50, maxbugs = 50;
    int var = 5 + items[itRoyalJelly];
    if(var>25) var=25;
    // minbugs += 100; maxbugs += 100;
    minbugs -= var; maxbugs += var;
    maxbugs += items[itRoyalJelly];
    int numbugs = minbugs + hrand(maxbugs - minbugs + 1);
    
    /* int i = items[itRoyalJelly];
    int chance = 20 + 25 * i + 9000;
    // i=0: 16%
    // i=10: 73%
    // i=50: 1270 vs 6000
    eMonster m = eMonster(moBug0 + hrand(BUGCOLORS));
    if(c->wall) return;
    for(int i=0; i<c->type; i++) {
      cell *c2 = createMov(c,i);
      if(hrand(100+chance) < chance) {
        if(!c2->wall) c2->monst = m;
        for(int j=2; j<=c2->type-2; j++) {
          int jj = (j+c->spn[i]) % c2->type;
          cell *c3 = createMov(c2, jj);
          if(hrand(6000+chance) < chance && !c3->wall)
            c3->monst = m;
          }
        }
      }
    c->monst = eMonster(m + BUGCOLORS); */
  
    int gdir = -1;
    for(int i=0; i<c->type; i++) {
      if(c->move(i) && c->move(i)->mpdist < c->mpdist) gdir = i;
      }
    if(!gdir) return;
    cellwalker bf(c, gdir);
    int radius = 9;
    if(getDistLimit() <= 6) radius = 6;
    if(chaosmode) radius = 5;
    if(chaosmode && getDistLimit() <= 5) radius = 4;
    if(getDistLimit() <= 3) radius = 3;

    for(int i=(chaosmode?0:2); i<radius; i++) 
      bf += revstep;
    cell *citycenter = bf.at;
    buginfo.clear();
    
    
    // mark the area with BFS
    bugcitycell(citycenter, 0);
    for(int i=0; i<isize(buginfo); i++) {
      buginfo_t& b(buginfo[i]);
      cell *c = b.where;
      int d = b.dist[0];
      // ERRORS!
      if(c->land != laHive && c->land != laNone) return;
      if(c->bardir != NODIR) return;
      if(c->land == laHive && c->landparam >= 100) return;
      // bfs
      if(d < radius) for(int t=0; t<c->type; t++)
        bugcitycell(createMov(c,t), d+1);
      }
  
    // place everything
    for(int i=0; i<isize(buginfo); i++) {
      buginfo_t& b(buginfo[i]);
      cell *c = b.where;
      int d = b.dist[0];
      if(d <= 1 && c->wall == waNone)
        c->item = itRoyalJelly;
      preventbarriers(c);
      if(d == 9 || d == 6 || d == 3)
        c->barleft = eLand(d/3),
        c->barright = eLand(k);
      else
        c->barleft = laNone;
      if(numbugs && c->wall == waNone)
        c->monst = eMonster(moBug0 + k), numbugs--;
      c->land = laHive;
      // prevent barriers
      if(c->mpdist == INFD) c->mpdist = BUGLEV;
      }
    }

  }

inline float& HEAT(cell *c) { return c->LHU.heat; }

namespace heat {
  
  void affect(cell *c, double delta) {
    if(isIcyLand(c)) HEAT(c) += delta;
    }
  
  double absheat(cell *c) {
    if(c->land == laCocytus) return HEAT(c) -.6;
    if(c->land == laIce || c->land == laBlizzard) return HEAT(c) -.4;
    return 0;
    }
  
  double celsius(cell *c) { return absheat(c) * 60; }
  
  // adjust to the improved heat transfer algorithm in 9.4
  const float FIX94 = 1.5;

  vector<cell*> offscreen_heat, offscreen_fire; // offscreen cells to take care off

  void processheat(double rate = 1) {
    if(markOrb(itOrbSpeed)) rate /= 2;
    if(racing::on) return;
    int oldmelt = kills[0];    
    
    vector<cell*> offscreen2;
    
    manual_celllister cl;
    
    int gr = gamerange();
    
    for(cell *c: offscreen_heat) {
      if(c->cpdist > gr && !doall) {
        if(!cl.add(c)) continue; 
        if(isIcyLand(c)) {
          if(HEAT(c) < .01 && HEAT(c) > -.01)
            HEAT(c) = 0;
          else {
            HEAT(c) *= 1 - rate/10;
            offscreen2.push_back(c);
            }
          }
        }
      }
    
    offscreen_heat = move(offscreen2);
  
    for(int i=0; i<numplayers(); i++) {
      cell *c = playerpos(i);
      if(!c) continue;
      double xrate = (c->land == laCocytus && shmup::on) ? rate/3 : rate;
      if(PURE) xrate *= 1.7; // todo-variation
      if(!shmup::on) xrate /= FIX94;
      if(isIcyLand(c))
        HEAT(c) += (markOrb(itOrbWinter) ? -1.2 : 1.2) * xrate;
      }
    
    vector<cell*>& allcells = currentmap->allcells();

    int dcs = isize(allcells);
    
    vector<ld> hmods(dcs, 0);
    
    for(int i=0; i<dcs; i++) {
      cell *c = allcells[i];
      double xrate = (c->land == laCocytus && shmup::on) ? 1/3. : 1;
      if(PURE) xrate *= 1.7; // todo-variation
      if(!shmup::on) xrate /= FIX94;
      if(c->cpdist > gr && !doall) break;
  
      if(isIcyLand(c)) {
        ld hmod = 0;

        if(c->monst == moRanger) hmod += 3 * xrate;
        if(c->monst == moDesertman) hmod += 4 * xrate;
        if(c->monst == moMonkey) hmod += xrate;
        if(c->wall == waDeadTroll) hmod -= 2 * xrate;
        if(c->wall == waDeadTroll2) hmod -= 1.5 * xrate;
        if(c->wall == waBigStatue) hmod -= .5 * xrate;
        if(c->monst == moLesser || c->monst == moLesserM || c->monst == moGreater || c->monst == moGreaterM)
          hmod += (c->land == laCocytus ? 1.5 : 10) * xrate;
        if(c->monst == moGreaterShark)
          hmod += 2 * xrate;
        if(c->monst == moCultist) hmod += 3 * xrate;
        if(c->monst == moCultistLeader) hmod += 4 * xrate;
        if(c->monst == moPyroCultist) hmod += 6 * xrate;
        if(c->monst == moFireFairy) hmod += 6 * xrate;
        if(c->monst == moFireElemental) hmod += 8 * xrate;
        if(isDragon(c->monst)) hmod += 2 * xrate;
        if(c->monst == moGhost) hmod -= xrate;
        if(c->monst == moFriendlyGhost) hmod -= xrate;
        if(c->monst == moSkeleton) hmod -= .2 * xrate;
        if(c->monst == moDraugr) hmod -= .75 * xrate;
        if(c->monst == moWaterElemental) hmod -= xrate;
        if(c->monst == moAirElemental) hmod -= .4 * xrate;
        if(isFire(c)) hmod += 4 * xrate;
        if(isPrincess(c->monst)) hmod += (markEmpathy(itOrbWinter) ? -1.2 : 1.2) * xrate;
        
        forCellEx(ct, c) {
          if(!isIcyLand(ct) && isFire(ct)) 
            hmod += xrate*.1;
          if(ct->land == laVolcano) 
            hmod += xrate * (ct->wall == waMagma ? .4 : .2);
          }
        
        forCellEx(ct, c) {
          if(!isIcyLand(ct)) {
            // make sure that we can still enter Cocytus,
            // it won't heat up right away even without Orb of Winter or Orb of Speed
            if(isPlayerOn(ct) && (c->land != laCocytus || markOrb(itOrbWinter))) 
              hmod += (markOrb(itOrbWinter) ? -1.2 : 1.2) / 4 * xrate;
            continue;
            }
          ld hdiff = absheat(ct) - absheat(c);
          hdiff /= 10;

          if(ct->land == laBlizzard) {
            int v = (windmap::at(ct) - windmap::at(c)) & 255;
            if(v > 128) v -= 256;
            if(v < windmap::NOWINDFROM && v > -windmap::NOWINDFROM)
              hdiff = hdiff * (1 - v * 5. / windmap::NOWINDFROM);
            }

          if(shmup::on && (c->land == laCocytus || ct->land == laCocytus))
            hdiff /= 3;
          // if(c->move(j)->cpdist > 7 && !quotient) hdiff += -HEAT(c) / 30;
          hmod += hdiff;
          }
        // printf("%d ", vsum);
        
        hmods[i] = hmod;
        }
      
      if(HEAT(c) && !doall)
        offscreen_heat.push_back(c);
      }
    
    #define MELTCOLOR 0xA04040
    
    for(int i=0; i<dcs; i++) {
      cell *c = allcells[i];
      if(!isIcyLand(c)) continue; 
      HEAT(c) += hmods[i] * rate;
      if(c->monst == moCrystalSage && HEAT(c) >= SAGEMELT) {
        addMessage(XLAT("%The1 melts away!", c->monst));
        fallMonster(c);
        }
      if(c->wall == waIcewall && HEAT(c) > .4) 
        drawParticles(c, MELTCOLOR, 4, 60),
        c->wall = waNone, kills[0]++;
      if(c->wall == waFrozenLake && HEAT(c) > (c->land == laCocytus ? .6 : .4)) 
        drawParticles(c, MELTCOLOR, 4, 60),
        playSound(c, "trapdoor", 50),
        c->wall = waLake, kills[0]++;
  
      if(c->wall == waLake && HEAT(c) < (c->land == laCocytus ? -.4 : .4) && c->monst != moGreaterShark) {
        c->wall = waFrozenLake;
        if(c->monst == moShark || c->monst == moCShark) {
          addMessage(XLAT("%The1 is frozen!", c->monst));
          fallMonster(c);
          }
        }
      }
  
    if(kills[0] != oldmelt) bfs();
    }

  vector<pair<cell*, int> > newfires;

  void processfires() {
    newfires.clear();
    
    vector<cell*> offscreen2;

    manual_celllister cl;
    
    vector<cell*>& allcells = currentmap->allcells();

    for(int x: {0,1}) for(cell *c: x==0 ? allcells : offscreen_fire) {
      if(!cl.add(c)) continue;
      
      if(isFireOrMagma(c)) {
        if(c->wall == waMagma) c->wparam = 20;
      
        cell *last = c->move(c->type-1);
        
        forCellEx(c2, c) {
          
          if(c->wall == waPartialFire) {
            // two partial fires adjacent are necessary to spread
            bool ok = false;
            forCellEx(c3, c2) if(c3 != c && c3->wall == waPartialFire)
              ok = true;
            if(!ok) continue;
            }

          if(c2->wall == waNone && c2->land == laRose && c->wparam >= 10)
            newfires.emplace_back(c2, c->wparam);
          if(c2->wall == waFire && c2->land == laRose && c->wparam >= 10 && c2->wparam < c->wparam/2)
            newfires.emplace_back(c2, c->wparam);
          if(againstWind(c, c2) && c->wall != waEternalFire && c->wparam >= 10) {
            if(isFire(c2)) {
              if(c2->wparam < c->wparam/2) 
                newfires.emplace_back(c2, c->wparam);
              }
            else {
              newfires.emplace_back(c2, c->wparam);
              useup(c);
              }
            }
          if(c2->land == laDryForest && c2->wall != waEternalFire) {
            c2->landparam++;
            if(c2->landparam >= (isStandardTree(c2) ? 1 : 10)) newfires.emplace_back(c2, 12);
            else offscreen2.push_back(c);
            }
          else if(c2->wall == waVinePlant || c2->wall == waRose || c2->wall == waSaloon ||
            c2->wall == waWeakBranch || c2->wall == waCanopy || c2->wall == waTrunk || c2->wall == waSolidBranch ||
            c2->wall == waBigBush || c2->wall == waSmallBush || c2->wall == waBonfireOff || c2->wall == waSmallTree ||
            c2->wall == waDock)
            newfires.emplace_back(c2, 12);
          else if(cellHalfvine(c2) && last && last->wall == c2->wall)
            newfires.emplace_back(c2, 12);
          else if(c2->wall == waExplosiveBarrel)
            newfires.emplace_back(c2, 12);
          else if(c2->wall == waFireTrap)
            newfires.emplace_back(c2, 12);
          // both halfvines have to be near fire at once
          last = c2;
          }
        
        }

      if(hasTimeout(c)) {
        if(c->mpdist == 8 && (c->land == laWineyard || c->land == laEndorian || c->land == laDocks)) {
          // do not expire, do not store in 'offscreen', do not generate more land
          }
        else {
          useup(c);
          offscreen2.push_back(c);
          }
        }
      
      if(c->wall == waArrowTrap && c->wparam && !shmup::on) {
        c->wparam++;
        if(c->wparam == 3) {
          if(canAttack(c, moArrowTrap, c, c->monst, AF_GETPLAYER))
            attackMonster(c, AF_NORMAL | AF_MSG | AF_GETPLAYER, moArrowTrap);
          }
        if(c->wparam == 4) c->wparam = 0;
        }

      if(c->wall == waFireTrap && c->wparam && !shmup::on) {
        c->wparam++;
        if(c->wparam == 3) {
          c->wall = waNone;
          explosion(c, 5, 10);
          }
        }
      }

   for(int i=0; i<isize(newfires); i++) {
      cell* c = newfires[i].first;
      int qty = newfires[i].second;
      qty /= 2;
      if(c->wall == waExplosiveBarrel) explodeBarrel(c);
      else if(c->wall == waFireTrap) {
        if(c->wparam == 0) c->wparam = 1;
        continue;
        }
      else if(c->wall == waBonfireOff) activateActiv(c, false);
      else if(cellHalfvine(c)) destroyHalfvine(c, waPartialFire, 6);
      else makeflame(c, qty, false);
      if(c->wparam < qty) c->wparam = qty;
      offscreen2.push_back(c);
      if(c->land == laRose || c->land == laWildWest || c->land == laOvergrown || isHaunted(c->land) || c->land == laMountain || c->land == laIce) {
        for(int j=c->mpdist-1; j>=7; j--) setdist(c, j, NULL);
        }
      }
   
    offscreen_fire = move(offscreen2);
    }  

  }

bool gardener = false;

bool lifebrought = false; // was Life brought to the Dead Caves?

void livecaves() {
  vector<cell*>& allcells = currentmap->allcells();
  int dcs = isize(allcells);
  
  vector<cell*> bringlife;
  int gr = gamerange();
  
  std::vector<int> heatvals(dcs);
  
  for(int i=0; i<dcs; i++) {
    cell *c = allcells[i];
    if(!doall && c->cpdist > gr+1) break;
    
    int & hv = heatvals[i];
    
    if(c->wall == waCavefloor || c->wall == waCavewall || c->wall == waDeadTroll) {
      hv = 0;
      if(c->monst == moDarkTroll) c->monst = moTroll;
      if(c->item || c->monst || c->cpdist == 0) continue;
      forCellEx(c2, c) {
        eWall w = c2->wall;
        if(w == waDeadfloor) hv++, bringlife.push_back(c2);
        else if(w == waDeadwall || (w == waDeadfloor2 && !c2->monst))
          hv--, bringlife.push_back(c2);
        else if(w == waCavefloor) hv++;
        else if(w == waCavewall) hv--;
        else if(w == waRubble) hv--;
        else if(w == waGargoyle) hv--;
        else if(w == waGargoyleFloor) hv--;
        else if(w == waGargoyleBridge) hv--;
        else if(w == waStone) ;
        else if(w == waDeadTroll) hv -= 5;
        else if(w == waDeadTroll2) hv -= 3;
        else if(w == waPetrified || w == waPetrifiedBridge) hv -= 2;
        else if(w == waVinePlant) hv--;
        else if(chaosmode && c2->land != laCaves && c2->land != laEmerald) ;
        else if(c2->land == laTrollheim) ; // trollheim floor does not count
        else if(w != waBarrier) hv += 5;
        
        if(sword::at(c)) hv += 500;

        if(c2->cpdist == 0 && markOrb(itOrbDigging)) hv+=100;
        if(items[itOrbEmpathy] && isFriendly(c2) && markEmpathy(itOrbDigging))
          hv+=100;
        if(w == waThumperOn) hv+=100;
        if(w == waFire) hv+=100;
        if(w == waBigStatue) hv-=100;
        if(c2->item && !peace::on) hv+=2;
        if(c2->monst == moZombie) hv += 10;
        if(c2->monst == moGhost) hv += 10;
        if(c2->monst == moTentacleGhost) hv += 10;
        if(c2->monst == moFriendlyGhost) hv += 10;
        if(c2->monst == moSkeleton) hv ++;
        if(c2->monst == moGargoyle) hv--;
        if(c2->monst == moDraugr) hv--;
        if(isDragon(c2->monst)) hv++;
        if(c2->monst == moNecromancer) hv += 10;
        if(c2->monst == moWormtail) hv++;
        if(c2->monst == moTentacletail) hv-=2;
        if(isIvy(c2)) hv--;
        if(isDemon(c2)) hv-=3;
        // if(c2->monst) c->tmp++;
        // if(c2->monst == moTroll) c->tmp -= 3;
        }
      }
    else if(c->land == laLivefjord) {
      hv = 0;
      if(c->monst == moWaterElemental)
        hv += 1000;
      if(isPlayerInBoatOn(c) && markOrb(itOrbWater))
        hv += 1000;
      if(c->monst == moEarthElemental)
        hv -= 1000;
      if(isPlayerOn(c) && markOrb(itOrbDigging))
        hv -= 1000;
      for(int j=0; j<c->type; j++) if(c->move(j)) {
        cell *c2 = c->move(j);
        if(c2->wall == waNone || c2->wall == waStrandedBoat)
          hv -= (c2->land == laLivefjord ? 1 : 100);
        if(c2->wall == waTempFloor || c2->wall == waTempBridge || c2->wall == waTempBridgeBlocked)
          ;
        else if(c2->wall == waDeadTroll || c2->wall == waDeadTroll2 || c2->wall == waThumperOn || isFire(c2) || snakelevel(c2))
          hv -= 10;
        else if(c2->wall == waPetrified || c2->wall == waPetrifiedBridge)
          hv -= 10;
        if(c2->wall == waBigStatue)
          hv -= 10;
        if(c2->wall == waSea || c2->wall == waBoat)
          hv += (c2->land == laLivefjord ? 1 : 100);
        if(c2->monst == moWaterElemental)
          hv += 1000;
        if(isPlayerOn(c2) && c2->wall == waBoat && markOrb(itOrbWater))
          hv += 1000;
        if(c2->monst == moEarthElemental)
          hv -= 1000;
        if(isPlayerOn(c2) && markOrb(itOrbDigging))
          hv -= 1000;
        if(items[itOrbEmpathy] && isFriendly(c2) && markEmpathy(itOrbDigging))
          hv -= 1000;

        if(c2->wall == waBarrier) {
          bool landbar = false;
          for(int k=0; k<c2->type; k++)
            if(c2->move(k)) {
              cell *c3 = c2->move(k);
              if(!isSealand(c3->land))
                landbar = true;
              }
          if(landbar) hv -= 5;
          else hv += 5;
          }
        }
      }
    }

  for(int i=0; i<dcs; i++) {
    cell *c = allcells[i];
    if(!doall && c->cpdist > gr+1) break;
    int hv = heatvals[i];

    if(c->wall == waCavefloor || c->wall == waCavewall) {
  //  if(c->land != laCaves) continue;
  //  if(c->wall == waThumper || c->wall == waBonfire) continue;
      
      if(hv > 0) c->wall = waCavefloor;
      if(hv < 0) {
        c->wall = waCavewall;
        if(c->land != laCaves && c->land != laDeadCaves && c->land != laEmerald && !gardener) {
          gardener = true;
          achievement_gain("GARDENER");
          }
        }
      }
    else if(c->land == laLivefjord) {
      if(hv > 0 && c->wall == waStrandedBoat) c->wall = waBoat;
      if(hv > 0 && c->wall == waNone) {
        if(c->item && c->cpdist == 1 && markOrb(itOrbWater))
          collectItem(c);
        c->wall = waSea;
        }
      if(hv < 0 && c->wall == waBoat) c->wall = waStrandedBoat;
      if(hv < 0 && c->wall == waSea) c->wall = waNone;
      }
    }
  
  for(int i=0; i<isize(bringlife); i++) {
    cell *c = bringlife[i];
    if(c->land == laDeadCaves && !lifebrought) { 
      lifebrought = true;
      achievement_gain("LIFEBRINGER");
      }
    if(c->wall == waDeadfloor) c->wall = waCavefloor;
    if(c->wall == waDeadfloor2) c->wall = waCavewall;
    if(c->wall == waDeadwall) c->wall = waCavewall;
    if(c->wall == waCavewall && c->item) c->wall = waCavefloor;
    if(c->land == laDeadCaves) c->land = laCaves;
    if(c->item == itSilver) c->item = itGold;
    if(c->item == itGreenStone) c->item = itOrbLife;
    if(c->monst == moEarthElemental) {
      addMessage(XLAT("%The1 is destroyed by the forces of Life!", c->monst));
      fallMonster(c);
      c->item = itOrbDigging;
      }
    }
  }

/* evolver */

namespace tortoise {
  map<cell*, int> emap;
  map<cell*, int> babymap;
  int last;
  
  enum tflag {
    tfShell, tfScute0, tfScute1, tfScute2, tfScute3,
    tfEdge1, tfEdge, tfEdge3,
    tfLongNeck, tfFront, tfRear, tfTail,
    tfEyeHue, tfShellHue, tfScuteHue, tfSkinHue,
    tfShellSat, tfScuteSat, tfSkinSat,
    tfShellDark, tfSkinDark,
    tfCOUNT
    };

  const int numbits = (int) tfCOUNT;
  const int mask = (1<<numbits)-1;

  int getb(cell *where) {
    if(emap.count(where)) return emap[where];
    return getBits(where);
    }

  int countBits(int c) {
    int bi = 0;
    for(int i=0; i<numbits; i++) if((c >> i)&1) bi++;
    return bi;
    }
  
  int getBit(int bits, int id) { return (bits >> id) & 1; }

  int getRandomBits() { return hrand(1 << numbits); }
  
  bool seek() { return items[itBabyTortoise] % 5; }
  int seekbits;
  double seekval[numbits];
  double currval[numbits];
  
  void update(double& val, double target, int delta) {
    double d = delta / 300.;
    if(d>1) d = 1;
    if(target>val+d) val += d;
    else if(target<val-d) val -= d;
    else val = target;
    }
  
  void updateVals(int delta) {
    int currbits = getBits(cwt.at);
    for(int i=0; i<numbits; i++)
      update(seekval[i], seek() && !(peace::on && !peace::hint) ? getBit(seekbits, i) : .5, delta);
    for(int i=0; i<numbits; i++)
      update(currval[i], getBit(currbits, i), delta);
    }
  
  double getScent(int bits) {
    double res = 0;
    for(int i=0; i<numbits; i++)
      /* if(getBit(bits, i) != getBit(getBits(cwt.at), i))
        res += (1 - 2*getBit(bits, i)); */
      res += (2* seekval[i] - 1) * (getBit(bits, i) - currval[i]);
    
    // seek curr bit => res
    //    1    1   1 => 0
    //    1    1   0 => -1
    //    1    0   1 => +1
    //    1    0   0 => 0
    //    0    1   1 => 0
    //    0    1   0 => +1
    //    0    0   1 => -1
    //    0    0   0 => 0
    return res;
    }
  
  int diff(int bits) { return countBits(bits ^ tortoise::seekbits); }
  int progress(int bits) { return numbits - diff(bits); }
  
  string measure(int bits) {
    return "(" + its(progress(bits)) + "/" + its(tortoise::numbits) + ")";
    }    
  }

namespace dragon {
 
  int whichturn; // which turn has the target been set on
  cell *target; // actually for all Orb of Control

  void pullback(cell *c) {
    int maxlen = 1000;
    while(maxlen-->0) {
      cell *c2 = c->move(c->mondir);
      mountmove(c, c->mondir, true, c2);
      c->monst = c2->monst;
      c->hitpoints = c2->hitpoints;
      animateMovement(c2, c, LAYER_BIG, c->c.spin(c->mondir));
      c->stuntime = 2;
      if(c2->mondir == NODIR) { c->mondir = NODIR; c2->monst = moNone; return; }
      c = c2;
      }
    }
  
  bool dragbugs = false;
  
  cell *findhead(cell *c) {
    cell *cor = c;
    int maxlen=1000;
    findhead:  
    if(maxlen--<0) return c;
    if(c->monst == moDragonHead) return c;
    for(int i=0; i<c->type; i++)
      if(c->move(i) && isDragon(c->move(i)->monst) && c->move(i)->mondir == c->c.spin(i)) {
        c = c->move(i); goto findhead;
        }
    if(cmode & sm::MAP) return c;
    if(!conformal::includeHistory) {
      printf("dragon bug #3 (%p -> %p)\n", cor, c); 
      dragbugs = true;
      }
    c->monst = moDragonHead; return c;
    }
  
  void validate(const char *where) {
    dragbugs = false;
    for(int i=0; i<isize(dcal); i++)
      if(dcal[i]->monst == moDragonTail)
        findhead(dcal[i]);
    if(dragbugs) {
      printf("DRAGON BUG in %s\n", where);
      exit(1);
      }
    }
  
  int bodypart(cell *c, cell *head) {
    int i = 0, j = 0;
    int maxlen = 1000;
    while(maxlen-->0) {
      if(head == c) i = j;
      j++;
      if(head->mondir == NODIR) break;
      head = head->move(head->mondir);
      }
    if(i == 0) return 'h';
    if(i == 1) return 'l';
    if(i == j-2) return '2';
    if(i == j-1) return 't';
    if(i == 2) return 'w';
    return 0;
    }
  
  void kill(cell *c, eMonster who) {
    int delay = false;
    kills[moDragonHead]++;
    int penalty = 0;
    int maxlen = 1000;
    while(maxlen-->0) {
      makeflame(c, 5, false);
      eMonster m = c->monst;
      drawFireParticles(c, 16);
      c->monst = moNone;
      if(checkOrb(who, itOrbUndeath)) 
        c->monst = moFriendlyGhost;
      if(checkOrb(who, itOrbStone)) 
        c->wparam = m, c->wall = waPetrified;
      else if(c->wall == waFire) {
        if(delay) delay = false;
        else {
          if(c->land != laDragon) penalty += 3;
          if(penalty) penalty--;
          else {
            c->item = itDragon;
            c->landparam = shmup::on ? shmup::curtime : turncount;
            delay = true;
            }
          }
        }
      if(c->mondir == NODIR) break;
      c = c->move(c->mondir);
      }
    }
  
  int totalhp(cell *c) {
    int total = 0;
    int maxlen = 1000;
    while(maxlen-->0) {
      if(!isDragon(c->monst)) {
        if(!conformal::includeHistory) printf("dragon bug #4\n");
        return total; 
        }
      total += c->hitpoints;
      if(c->mondir == NODIR) return total;
      c = c->move(c->mondir);
      }
    return total;
    }
  
  #define SWAPBITFIELD(x,y,t) { t bak=x; x=y; y=bak; }
  
  void pullfront(cell *c, cell *until) {
    int maxlen = 1000;
    static vector<cell*> allcells;
    allcells.clear();
    while(maxlen-->0) {
      allcells.push_back(c);
      // SWAPBITFIELD(c->monst, buffer->monst, eMonster);
      // SWAPBITFIELD(c->hitpoints, buffer->hitpoints, int);
      c->stuntime = 2;
      if(c == until) {
        for(int i=isize(allcells)-2; i>=0; i--) {
          cell *cmt = allcells[i+1];
          cell *cft = allcells[i];
          cmt->hitpoints = cft->hitpoints;
          cmt->monst = cft->monst;
          cft->monst = moNone;
          mountmove(cmt, cmt->mondir, true, cft);
          animateMovement(cft, cmt, LAYER_BIG, allcells[i]->mondir);
          }
        while(c->mondir != NODIR) {
          c = c->move(c->mondir);
          c->stuntime = 2;
          }
        break;
        }
      if(c->mondir == NODIR) { printf("dragon bug\n"); break; }
      c = c->move(c->mondir);
      if(!c) { 
        if(!conformal::includeHistory) printf("dragon bug #2\n"); 
        break; 
        }
      }
    }
  
  bool move(cell *dt, cell *df) {
    if(df->monst == moDragonHead) {
      dt->mondir = neighborId(dt,df);
//    printf("pull back\n");
      pullback(dt);
      dt->stuntime = 2;
      return true;
      }
    if(df->monst == moDragonTail && df->stuntime == 0) {
      cell *head = findhead(df);
      if(df->mondir == NODIR) {
        df->mondir = neighborId(df,dt);
        dt->mondir = NODIR;
//      printf("pull all: head = %p, df=%p, dt=%p\n", head, df, dt);
        pullfront(head, dt);
        }
      else {
        cell *c2 = df->move(df->mondir);
        if(!c2) return false;
        int id = neighborId(dt, c2);
        if(id == -1) return false;
        dt->mondir = id;
        df->mondir = neighborId(df, dt);
//      printf("pull front: head = %p, df=%p, dt=%p\n", head, df, dt);
        pullfront(head, dt);
        }
      return true;
      }
    return false;
    }

  }

namespace sword {
  int angle[MAXPLAYER];

  cell *pos(cell *c, int s) {
    int t = c->type;
    s *= 2;
    s += S42/t;
    s %= S84;
    if(s<0) s += S84;
    s *= t;
    s /= S84;
    return c->move(s);
    }
  
  eItem orbof(bool rev) { return rev ? itOrbSword2 : itOrbSword; }
  int orbcount(bool rev) { return items[orbof(rev)]; }
  
  cell *pos(int id, bool rev) {
    if(!orbcount(rev)) return NULL;
    return pos(playerpos(id), angle[id] + (rev ? S21 : 0));
    }
  
  bool at(cell *where, bool noplayer) {
    if(noplayer) return false;
    if(!orbcount(0) && !orbcount(1)) return false;
    for(int i=0; i<numplayers(); i++) if(multi::playerActive(i)) for(int b=0; b<2; b++)
      if(pos(i,b) == where) return true;
    return false;
    }
  
  bool isnear(cell *where) {
    if(at(where, false)) return true;
    forCellEx(w2, where) if(at(w2, false)) return true;
    return false;
    }

  // from c1 to c2
  int shift(cell *c1, cell *c2, int angle) {
    if(!c1 || !c2) return 0;
    int s1 = neighborId(c1, c2);
    int s2 = neighborId(c2, c1);
    if(s1 < 0 || s2 < 0) return angle;
    if(c1->c.mirror(s1))
      return ((s2*S42/c2->type - angle + s1*S42/c1->type) + S21) % S42;
    else
      return ((s2*S42/c2->type - s1*S42/c1->type) + S21 + angle) % S42;
    }

  void shuffle(int i) {
    sword::angle[i] = euclid ? S7*hrand(6) : PURE ? 3*hrand(S14)+1 : hrand(S42);
    }
  
  void reset() {
    items[itOrbSword] = items[itOrbSword2] = 0;
    shuffle(multi::cpid);
    }

  void shuffle() {
    for(int i=0; i<MAXPLAYER; i++) shuffle(i);
    }
  };

namespace kraken {

  cell *head(cell *c) {
    if(c->monst == moKrakenH) return c;
    if(c->monst == moKrakenT) return c->move(c->mondir);
    return NULL;
    }
 
  void kill(cell *c, eMonster who) {
    drawParticles(c, minf[moKrakenH].color, 16);
    c->monst = moNone;
    if(checkOrb(who, itOrbUndeath)) c->monst = moFriendlyGhost;
    if(c->land == laKraken && !c->item) c->item = itKraken;
    kills[moKrakenH]++;
    if(checkOrb(who, itOrbStone)) c->wall = waNone;
    for(int i=0; i<c->type; i++)
      if(c->move(i)->monst == moKrakenT) {
        drawParticles(c, minf[moKrakenT].color, 16);
        c->move(i)->monst = moNone;
        if(checkOrb(who, itOrbStone)) {
          if(isWatery(c->move(i)))
            c->move(i)->wall = waNone;
          else
            c->move(i)->wall = waPetrified, c->move(i)->wparam = moKrakenT;
          }
        }
    }
  
  int totalhp(cell *c) {
    int total = 0;
    for(int i=0; i<c->type; i++)
      if(c->move(i)->monst == moKrakenT)
        total += c->move(i)->hitpoints;
    return total;
    }
  
  void trymove(cell *c);
  
  void sleep(cell *c) {
    if(c->monst == moKrakenT) c = c->move(c->mondir);
    c->stuntime = 1;
    forCellEx(c2, c) c2->stuntime = 1;
    }
  
  void attacks() {
    pathdata pd(2);
    bool offboat[MAXPLAYER];
    for(int i=0; i<MAXPLAYER; i++) offboat[i] = false;
    for(int i=0; i<isize(dcal); i++) {
      cell *c = dcal[i];
      if(c->monst == moKrakenT && !c->stuntime) forCellEx(c2, c) {
        bool dboat = false;
        if(c2->monst && canAttack(c, moKrakenT, c2, c2->monst, AF_ONLY_FBUG)) {
          attackMonster(c2, AF_NORMAL | AF_MSG, c->monst);
          sleep(c);
          }
        else for(int i=0; i<numplayers(); i++) if(playerpos(i) == c2) {
          if(isPlayerInBoatOn(c2, i)) {
            addMessage(XLAT("%The1 destroys your boat!", moKrakenH));
            dboat = true;
            offboat[i] = true;
            }
          else if(offboat[i]) ;
          else killThePlayer(moKrakenH, i, 0);
          sleep(c);
          }
        if(dboat) destroyBoats(c2, c, true);
        }
      }
    for(int i=0; i<isize(dcal); i++) {
      cell *c = dcal[i];
      if(c->monst == moKrakenH && !c->stuntime && !isWateryOrBoat(c)) {
        int qdir = 0;
        cell *ctab[MAX_EDGE];
        forCellEx(c2, c) if(isWatery(c2)) ctab[qdir++] = c2;
        hrandom_shuffle(ctab, qdir);
        while(qdir--) trymove(ctab[qdir]);
        }
      }
    }

  // c is the tentacle which will be the head after the move
  void trymove(cell *c) {
    if(kraken_pseudohept(c)) return;
    cell *c2 = c->move(c->mondir);
    if(!isWatery(c)) return;
    if(againstCurrent(c, c2)) return;
    forCellIdEx(c3, i, c) {
      if(c3->monst && c3 != c2 && !(c3->mondir >= 0 && c3->mondir < c3->type &&
        c3->move(c3->mondir) == c2))
        return;
      if(isPlayerOn(c3)) return;
      if(sword::at(c3)) return;
      if(!passable(c3, c, P_FISH | P_MONSTER)) return;
      }
    if(c2->stuntime) return;
    int hpcount[10];
    forCellIdEx(c3, i, c2) {
      hpcount[i] = c3->hitpoints;
      c3->monst = moNone;
      }
    c->monst = moKrakenH;
    vector<pair<cell*, cell*> > acells;
    acells.push_back(make_pair(c2, c));
    forCellIdEx(c3, i, c) {
      c3->monst = moKrakenT, c3->mondir = c->c.spin(i), onpath(c3, 0);
      int i0 = (i+c->c.spin(c->mondir)-c->mondir+96+c->type/2) % c2->type;
      c3->hitpoints = hpcount[i0];
      acells.push_back(make_pair(c2->move(i0), c3));
      if(c3->wall == waBoat) {
        addMessage(XLAT("%The1 destroys %the2!", moKrakenH, waBoat));
        c3->wall = waSea;
        }
      if(c3->wall == waStrandedBoat) {
        addMessage(XLAT("%The1 destroys %the2!", moKrakenH, waBoat));
        c3->wall = waNone;
        }
      }
    
    while(isize(acells)) {
      // bool found = false;
      for(int i=0; i<isize(acells); i++) {
        /* bool noconflict = true;
        for(int j=0; j<isize(acells); j++) 
          if(acells[i].second == acells[j].first)
            noconflict = false; */
        /* if(noconflict) */ {
          // found = true;
          indAnimateMovement(acells[i].first, acells[i].second, LAYER_BIG, NOHINT);
          acells[i] = acells[isize(acells)-1];
          acells.resize(isize(acells)-1);
          i--;
          }
        }
      }
    commitAnimations(LAYER_BIG);
    sleep(c);
    onpath(c, 0);
    return;
    }
  
  }

bool barrierhept(cell *c) {
  return c->bardir != NOBARRIERS && c->bardir != NODIR;
  }

namespace prairie {

  using namespace fieldpattern;
  
  int getfval(cell *c3) {
    if(barrierhept(c3)) return btspin(fieldval(c3).first, c3->bardir)+1;
    return 0;
    }
  
  void spread(cell *c, cell *from) {
    int rd;
    
    c->LHU.fi.flowerdist = 8;
    c->LHU.fi.walldist = 8;
    c->LHU.fi.walldist2 = 8;
    
    if(euwrap) { // fix cylinder
      c->LHU.fi.rval = 0;
      }
    else if(euclid) {
      int x, y;
      tie(x,y) = cell_to_pair(c);
      c->LHU.fi.rval = (y&15);
      }
    else if(sphere) {
      c->LHU.fi.rval = celldistance(c, cwt.at) + 8 - (PURE ? 2 : 3);
      }
    else if(weirdhyperbolic) {
      c->LHU.fi.rval = max(celldist(c), 15);
      }
    else {
      if(geometry == gFieldQuotient || !from) {
        c->fval = currfp.distflower0;
        }
      else if(from && from->land == laPrairie && from->fval)
        c->fval = from->fval;
      else {
        forCellEx(c2, c) if(c2->land == laPrairie && c2->fval)
          c->fval = c2->fval;
        if(!c->fval) forCellEx(c2, c) if(!c->fval) c->fval = getfval(c2);
        if(!c->fval) forCellEx(c2, c) forCellEx(c3, c2) if(!c->fval) c->fval = getfval(c3);
        if(!c->fval) {
  
          int barclose = 0;
  
          forCellEx(c2, c) if(barrierhept(c2)) barclose++;
  
          forCellEx(c2, c) forCellEx(c3, c2)
          if(barrierhept(c3)) barclose++;
    
          printf("c = %p bc = %d\n", c, barclose);
        
          raiseBuggyGeneration(c, "could not set river fval");
          }
        }
      pair<int,bool> fv = fieldpattern::fieldval(c);
      fv = currfp.gmul(fv, currfp.inverses[c->fval-1]);
      
      rd = currfp.getdist(fv, currfp.distriver);
      int rl = currfp.getdist(fv, currfp.distriverleft);
      int rr = currfp.getdist(fv, currfp.distriverright);

      c->LHU.fi.flowerdist = currfp.getdist(fv, currfp.distflower);
      c->LHU.fi.walldist   = currfp.getdist(fv, currfp.distwall);
      c->LHU.fi.walldist2  = currfp.getdist(fv, currfp.distwall2);

      c->LHU.fi.rval = 0;
      if(rd <= 7 && rl < rr) 
        c->LHU.fi.rval = 8 + rd;
      if(rd <= 7 && rl > rr) 
        c->LHU.fi.rval = 7 - rd;
      }
    
    if(c->LHU.fi.flowerdist == 0 && c->type != 6) c->item = itOrbSafety;
    
    if(c->LHU.fi.walldist == 0) c->wall = waBarrier;

    if(0) if(c->type == 7) for(int i=0; i<7; i++) {
      eItem m = currfp.markers[fieldpattern::btspin(c->master->fieldval,i)];
      if(m) {
        if(c->item) c->item = itBuggy2;
        else c->item = m, c->mondir = i;
        if(c->wall == waSea) c->wall = waBoat;
        }
      }
    }
  
  #define RLOW (sphere?(PURE?7:6):PURE?4:2)
  #define RHIGH (sphere?(PURE?8:9):PURE?11:13)
  
  bool no_worms(cell *c) {
    int rv = c->LHU.fi.rval;
    return rv > RLOW+1 && rv < RHIGH-1;
    }

  bool isriver(cell *c) {
    return c->land == laPrairie && c->LHU.fi.rval <= RHIGH && c->LHU.fi.rval >= RLOW;
    }

  bool mainriver(cell *c) {
    return c->LHU.fi.rval <= 8 && c->LHU.fi.rval >= 7;
    }

  bool nearriver(cell *c) {
    return c->LHU.fi.rval == RHIGH+1 || c->LHU.fi.rval == RLOW-1;
    }

  cell *enter;
  
  bool opposite(cell *c) {
    return (c->LHU.fi.rval ^ enter->LHU.fi.rval) & 8;
    }

  bool isleft(cell *c) {
    return c->LHU.fi.rval & 8;
    }

  int towerleft(cell *c) { 
    return c->LHU.fi.rval;
    }
  
  int towerright(cell *c) { 
    return 15^c->LHU.fi.rval;
    }
  
  cell *next(cell *c, int pv=1) {
    for(int i=0; i<c->type; i++) {
      cell *c1 = createMov(c, i);
      cell *c2 = createMov(c, (i+pv+c->type)%c->type);
      if(c1 && c1->LHU.fi.rval == c->LHU.fi.rval)
      if(c2 && c2->LHU.fi.rval == c->LHU.fi.rval+1)
      if(isNeighbor(c1,c2))
        return c1;
      }
    return NULL;
    }
  
  cell *prev(cell *c) { return next(c, -1); }
  
  int beastdist(cell *c, int dir) { 
    cell *cx = c; int n=0;
    while(true) { 
      if(cx->monst == moHerdBull) return n;
      cx = next(cx, dir); 
      n++; 
      if(!cx || n >= 1000) return 1000; 
      }
    }
  
  vector<cell*> beaststogen;
    
  void generateBeast(cell *c) {
    int beastdistance = min(beastdist(c, 1), beastdist(c, -1));
    if(hrand(1000) >= 15 * beastdistance + 2 * items[itGreenGrass]) return;
    c->monst = moHerdBull;
    cell *c2 = prev(c);
    if(c2) c->mondir = neighborId(c, c2);
    }   

  void moveAt(cell *c, manual_celllister& cl) {
    if(!cl.add(c)) return;
    vector<cell*> whirlline;
    whirlline.push_back(c);
    cell *c2 = prev(c);
    while(c2 && cl.add(c2)) {
      whirlline.push_back(c2);
      c2 = prev(c2);
      // in sphere/quotient geometries, never break before a bull
      if((sphere || quotient) && !c2->monst) break;
      }
    reverse(whirlline.begin(), whirlline.end());
    c2 = next(c); 
    while(c2 && cl.add(c2)) whirlline.push_back(c2), c2 = next(c2);
    int qty = isize(whirlline);
    if(shmup::on) {
      for(int i=0; i<qty; i++) if(whirlline[i]->cpdist <= gamerange()) {
        generateBeast(whirlline[i]);
        break;
        }
      }
    else {
      c2 = whirlline[qty-1];
      if(c2->monst == moHerdBull) c2->monst = moNone;
      if(!shmup::on) for(int q=qty-2; q>=0; q--) {
        cell *cp = whirlline[q];
        cell *cn = whirlline[q+1];
        if(cp->monst == moHerdBull && !cp->stuntime) {
          forCellEx(c2, cp) {
            int flags = AF_GETPLAYER | AF_BULL;
            if(c2 != cn) flags |= AF_ONLY_FBUG;
            if(canAttack(c, moHerdBull, c2, c2->monst, flags))
              attackMonster(c2, flags | AF_MSG, moHerdBull);
            }
              
          if(!cn->monst && !isPlayerOn(cn) && passable_for(cp->monst, cn, cp, P_DEADLY))
            moveMonster(cn, cp, NODIR);
          else {
            playSound(NULL, "hit-axe"+pick123());
            beastcrash(cn, cp);
            cp->monst = moRagingBull;
            cp->stuntime = 3;
            cp->mondir = NODIR;
            }
          }
        }
      if(!sphere && !quotient) generateBeast(whirlline[0]); 
      }
    }
          
  void move() {
    manual_celllister cl;
    for(int i=0; i<isize(dcal); i++) {
      cell *c = dcal[i];
      if(isriver(c)) moveAt(c, cl);
      }
    for(int i=0; i<isize(beaststogen); i++)
      generateBeast(beaststogen[i]);
    beaststogen.clear();
    }
  
  vector<cell*> tchoices;
  
  cell *lasttreasure;
  
  // vector<cell*> orbs;
  
  bool thisriver(cell *c) {
    forCellEx(c2, c) if(c2->mpdist < c->mpdist && !isriver(c2)) return false;
    forCellEx(c2, c) if(c2->mpdist < c->mpdist) return thisriver(c2);
    return true;
    }
  
  void generateTreasure(cell *c) { 
//    if(nearriver(c) && op
    if(enter && nearriver(c) && opposite(c) && thisriver(c)) {
      int hr = hrand(100);
      if(hr == 0 && items[itGreenGrass] >= 10) {
        c->item = itOrbBull;
        // orbs.push_back(c); 
        }
      else if(hr < 1+PRIZEMUL) {
        placePrizeOrb(c);
        // if(c->item) orbs.push_back(c);
        }
      else tchoices.push_back(c);
      } 
    }
  
  void treasures() {
    if(enter && !isriver(cwt.at)) enter = NULL;
    else if(!enter && isriver(cwt.at)) enter = cwt.at;
    if(isize(tchoices)) {
      if(lasttreasure && lasttreasure->item == itGreenGrass) {
        if(celldistance(lasttreasure, cwt.at) >= (PURE ? 7 : 10)) {
          lasttreasure->item = itNone;
          forCellEx(c2, lasttreasure) if(c2->item == itGreenGrass) c2->item = itNone;
          }
        else { tchoices.clear(); return; }
        }
      if(isize(tchoices) < 3) { tchoices.clear(); return; }
      lasttreasure = tchoices[hrand(isize(tchoices))];
      lasttreasure->item = itGreenGrass;
      for(int i=0; i<isize(tchoices); i++) if(isNeighbor(tchoices[i], lasttreasure))
        tchoices[i]->item = itGreenGrass;
      tchoices.clear();
      }
    }  
  }

namespace ca {
  ld prob = .2;
  string carule[8][2];
  
  void init() {
    // hexagonal variant of Game of Life, as suggested by Wikipedia
    for(int i=0; i<8; i++) 
      carule[i][0] = "00100000",
      carule[i][1] = "00011000";
    }

#if CAP_COMMANDLINE
  bool readArg() {
    using namespace arg;
    if(argis("-caprob")) {
      shift(); prob = argf();
      return 0;
      }
    if(args()[0] != '-') return 1;
    if(args()[1] != 'c') return 1;
    int livedead = args()[2] - '0';
    if(livedead < 0 || livedead > 1) return 1;
    int nei = -1;
    if(args()[3]) {
      nei = args()[3] - '0';
      if(nei < 0 || nei > 7) return 1;
      if(args()[4]) return 1;
      }
    shift();
    string s = args(); s += "00000000";
    if(nei == -1) for(int i=0; i<8; i++)
      carule[i][livedead] = s;
    else 
      carule[nei][livedead] = s;
    return 0;
    }
  
  auto ah = addHook(hooks_args, 0, readArg);
#endif

  void simulate() {
    if(cwt.at->land != laCA) return;
    vector<cell*>& allcells = currentmap->allcells();
    int dcs = isize(allcells);
    std::vector<bool> willlive(dcs);
    for(int i=0; i<dcs; i++) {
      cell *c = allcells[i];
      if(c->land != laCA) return;
      int nei = 0, live = 0;
      forCellEx(c2, c) if(c2->land == laCA) {
        nei++; if(c2->wall == waFloorA) live++;
        }
      int welive = 0; if(c->wall == waFloorA) welive++;
      willlive[i] = carule[nei][welive][live] == '1';
      }
    for(int i=0; i<dcs; i++) {
      cell *c = allcells[i];
      c->wall = willlive[i] ? waFloorA : waNone;
      }
    }
  }

auto ccm = addHook(clearmemory, 0, [] () {
  heat::offscreen_heat.clear();
  heat::offscreen_fire.clear();
  princess::clear();
  mirror::mirrors.clear();
  clearing::bpdata.clear();
  tortoise::emap.clear();
  tortoise::babymap.clear();
  prairie::lasttreasure = NULL;
  prairie::enter = NULL;
  prairie::tchoices.clear();
  prairie::beaststogen.clear();
  mirror::clearcache();
  }) +
  addHook(hooks_removecells, 0, [] () {
    eliminate_if(heat::offscreen_heat, is_cell_removed);
    eliminate_if(heat::offscreen_fire, is_cell_removed);
    eliminate_if(princess::infos, [] (princess::info*& i) { 
      if(is_cell_removed(i->princess) || is_cell_removed(i->prison)) { 
        DEBSM(printf("removing a princess\n");)
        if(i->princess && !is_cell_removed(i->princess)) {
          DEBSM(printf("faking a princess\n");)
          princess::newFakeInfo(i->princess);
          }
        delete i; 
        return true;
        }
      return false; 
      });
    set_if_removed(prairie::lasttreasure, NULL);
    set_if_removed(prairie::enter, NULL);
    eliminate_if(prairie::tchoices, is_cell_removed);
    eliminate_if(prairie::beaststogen, is_cell_removed);
    for(auto& bpd: clearing::bpdata) set_if_removed(bpd.second.root, NULL);
    });

// windcode arrays precomputed for speed

int windcodes18920[] = 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0,138,94,122,137,129,240,205,62,69,78,100,7,243,221,223,225,222,202,209,218,235,230,210,22,5,44,11,12,31,48,104,109,93,166,179,176,221,237,44,60,90,105,128,196,148,160,146,22,25,34,42,116,141,168,196,231,70,207,227,236,226,201,197,185,72,91,152,248,239,98,86,216,80,85,96,89,97,31,17,30,187,172,121,198,199,202,220,60,47,248,57,19,196,121,100,70,69,96,163,123,125,130,128,23,36,233,240,109,159,173,166,158,226,46,19,193,126,91,50,142,77,161,160,162,161,75,62,204,159,161,162,204,219,219,187,170,120,209,219,250,230,221,223,224,225,154,173,76,64,41,139,105,38,192,75,47,53,165,159,145,218,127,38,5,227,122,130,252,226,207,214,8,30,133,118,103,175,82,84,75,56,218,190,188,235,131,121,123,106,89,47,191,201,121,14,90,107,218,226,27,130,87,78,72,84,7,119,55,51,184,183,191,49,131,113,145,149,143,195,163,159,211,204,172,190,197,191,183,193,214,44,46,42,7,92,133,165,164,177,190,152,106,87,88,154,152,137,77,30,238,228,223,227,220,226,25,159,203,185,105,138,182,181,189,198,196,204,144,157,164,165,168,243,138,145,232,233,235,244,197,228,238,107,74,44,31,7,244,223,207,143,155,63,50,62,138,175,186,130,130,113,243,166,253,131,92,75,146,111,125,110,117,212,220,205,203,227,4,68,65,93,148,144,172,131,116,3,2,8,41,40,180,194,200,222,198,185,13,29,62,224,172,100,132,182,232,3,56,174,188,203,60,4,173,196,182,205,191,189,188,193,255,31,196,197,229,188,62,20,216,79,56,163,246,250,245,239,57,79,253,3,0,62,57,244,219,211,208,209,120,123,85,63,202,201,4,153,247,19,30,8,128,53,58,198,154,143,138,85,95,111,80,90,94,207,164,155,143,123,84,242,129,58,37,10,154,186,172,170,217,199,182,181,203,198,30,234,252,194,168,171,175,187,224,184,153,129,44,98,110,239,241,119,151,173,80,79,196,140,139,123,101,107,138,166,196,224,127,121,86,82,105,143,176,199,148,126,79,90,132,222,242,12,203,165,23,21,243,247,195,122,146,162,194,186,179,99,88,226,234,240,221,197,142,152,34,54,190,229,197,109,83,60,54,52,209,153,142,158,241,240,69,82,170,89,88,210,218,228,215,210,235,252,51,74,254,243,107,8,162,250,14,50,120,121,121,58,9,82,193,202,204,217,225,24,249,248,125,117,146,109,211,75,54,56,34,250,2,2,6,121,111,20,55,52,36,20,114,146,161,210,179,166,185,0,36,42,46,120,142,160,170,243,65,66,146,63,48,22,71,109,91,189,194,111,113,253,11,1,249,80,71,29,168,165,120,83,10,246,165,147,147,185,195,211,232,68,18,30,61,22,248,207,31,89,92,29,217,26,8,222,14,44,72,12,38,118,132,146,163,182,157,226,193,1,122,81,217,26,38,4,232,3,251,173,123,130,153,160,217,202,204,20,107,69,60,6,114,100,89,78,44,207,176,101,230,103,251,73,236,220,56,13,35,152,172,72,206,209,110,106,112,144,82,94,10,23,197,228,201,199,180,138,202,31,49,65,139,151,190,25,24,35,60,219,200,180,167,51,46,39,49,54,24,155,16,193,37,31,41,30,2,65,112,140,124,137,139,134,52,246,159,160,71,162,158,245,39,230,228,254,32,23,108,159,165,174,6,55,164,21,8,218,88,202,45,127,198,190,117,28,48,113,89,53,166,155,52,158,25,195,39,35,20,2,229,185,147,10,13,50,78,11,217,120,120,90,159,150,18,99,220,185,173,252,245,14,65,70,22,40,73,187,21,194,136,224,37,28,90,12,19,22,24,168,147,39,237,244,32,131,62,71,91,183,44,20,13,195,162,135,12,123,118,91,232,167,119,32,58,53,127,130,117,153,12,53,37,77,97,175,180,77,89,47,127,39,108,20,236,228,16,165,173,89,126,167,95,150,61,50,26,6,249,230,225,141,49,41,134,145,163,167,250,254,122,136,212,182,186,69,58,157,159,168,185,190,217,169,70,78,34,61,104,39,229,177,51,251,149,181,114,107,133,218,228,177,7,176,175,223,151,139,104,117,222,10,199,218,133,160,251,205,112,116,43,151,163,166,70,42,219,223,83,48,121,195,252,177,125,192,189,239,31,209,158,77,134,46,52,198,205,198,158,21,43,230,178,114,29,192,243,228,8,191,52,41,74,205,2,27,170,189,148,22,74,128,188,};
int windcodes5676[] = 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,243,89,141,103,31,20,13,6,12,10,255,242,85,106,117,67,136,176,204,143,82,137,68,54,54,99,122,102,13,243,236,240,17,16,39,99,18,250,242,7,34,30,205,204,219,213,222,230,244,12,24,23,5,219,16,253,247,244,13,10,23,49,34,225,228,232,17,23,105,149,147,126,108,87,176,1,31,21,12,17,245,51,1,253,241,235,18,89,139,143,126,250,226,177,246,128,81,44,26,19,12,253,216,152,39,68,61,65,35,8,51,30,24,34,8,129,41,26,253,19,14,18,249,221,211,230,3,243,239,225,227,251,161,180,254,248,255,254,7,222,227,172,122,98,136,101,99,155,223,8,27,12,247,248,37,23,13,30,43,38,67,56,8,37,73,62,70,114,145,120,129,153,209,254,2,248,251,82,207,161,75,57,189,188,146,168,139,96,60,255,11,25,22,10,3,1,224,198,59,38,12,28,46,67,128,90,60,117,227,68,130,179,214,247,250,0,18,13,216,8,248,21,30,17,9,74,1,211,201,159,189,146,219,249,237,195,207,99,58,40,1,237,255,251,243,178,147,120,94,98,21,206,6,19,239,242,21,130,173,227,20,47,64,131,125,31,32,56,53,40,42,195,31,1,31,61,78,78,66,67,94,117,186,203,187,14,231,215,209,225,218,209,236,10,24,40,81,143,84,87,54,76,60,73,68,20,25,92,82,106,117,36,26,16,31,56,206,33,33,95,95,125,157,218,236,10,10,19,22,59,44,33,20,7,37,65,26,13,251,4,45,47,47,52,255,192,160,129,118,145,194,184,194,223,154,208,228,23,14,253,240,208,122,29,230,25,7,4,19,15,40,65,175,198,161,135,113,111,57,52,47,98,68,33,38,29,119,127,112,245,234,217,243,17,44,241,207,222,39,3,10,4,223,244,253,0,244,230,251,186,169,184,7,18,7,67,116,136,20,17,14,172,124,135,249,9,13,5,242,238,70,42,53,94,19,17,11,2,0,1,8,6,18,254,143,145,2,239,192,202,170,104,76,215,130,22,231,242,249,1,14,219,5,32,29,27,15,33,63,201,179,252,203,200,17,16,29,15,17,44,239,36,169,217,147,4,33,142,100,105,124,102,8,189,95,117,147,20,43,50,36,14,172,136,162,153,90,22,225,223,34,237,221,209,218,21,56,39,25,12,27,43,250,253,204,111,53,9,255,234,246,35,228,183,27,23,35,52,249,21,38,24,7,248,12,40,79,121,135,70,73,65,153,241,5,20,3,21,25,5,0,26,28,130,124,76,43,46,33,15,39,40,46,6,253,3,193,247,223,241,216,250,252,231,67,44,19,24,18,50,177,33,8,106,164,250,8,6,233,239,47,26,27,128,12,241,13,251,240,135,120,81,24,70,103,86,109,100,144,193,246,179,192,203,182,153,18,9,9,18,35,76,47,225,241,40,0,13,15,254,178,188,199,230,226,229,235,90,12,18,33,26,7,12,19,234,205,189,171,189,244,215,168,241,245,16,47,138,81,90,104,3,12,232,172,199,170,147,79,111,219,52,70,72,50,61,81,240,205,206,2,106,178,168,207,92,58,21,8,13,18,31,15,189,155,46,71,64,14,33,77,6,19,239,224,239,255,138,177,119,247,152,17,29,150,58,42,59,41,74,58,37,35,26,246,157,3,216,227,246,88,136,59,55,107,97,71,20,61,33,29,234,207,26,160,177,172,139,49,51,132,234,89,108,33,202,201,9,26,14,9,35,124,118,24,225,236,244,36,55,52,140,47,13,13,229,248,255,250,13,36,26,17,236,200,250,56,3,2,31,60,21,73,72,82,164,254,238,199,34,29,90,102,66,81,238,248,177,161,60,15,248,238,247,24,161,200,52,211,12,31,80,57,154,248,10,6,32,21,3,235,229,31,132,9,9,98,102,248,150,160,73,6,201,224,41,63,67,15,52,27,197,200,201,142,36,21,57,76,82,71,2,249,18,229,51,128,119,4,254,251,19,29,13,42,236,16,236,66,15,178,247,211,91,115,111,77,57,10,134,236,34,40,220,230,1,63,97,206,2,214,235,213,251,4,46,44,50,49,30,23,221,0,14,63,97,181,21,82,113,134,144,255,6,8,24,23,20,18,209,169,80,98,116,180,170,153,70,45,14,15,22,31,41,5,244,54,47,45,52,254,253,241,24,142,27,117,137,151,11,39,17,9,14,177,200,200,43,33,20,37,24,11,23,35,244,13,46,9,14,241,244,8,32,51,46,234,16,23,30,96,17,60,127,30,16,48,45,54,63,65,190,180,152,207,229,219,233,222,136,237,249,8,116,181,185,36,28,17,40,74,81,10,235,163,217,43,49,32,17,4,250,37,11,26,242,8,244,39,103,132,143,150,136,236,54,31,219,186,114,105,69,34,7,251,6,213,204,185,225,165,200,216,11,8,18,248,92,181,9,16,243,231,248,154,185,123,74,242,11,8,237,141,161,121,221,172,143,13,24,23,2,30,31,55,77,31,253,17,10,167,207,140,38,242,224,243,246,15,193,120,161,17,19,121,84,218,2,6,225,125,41,13,23,7,229,23,1,213,245,244,212,233,216,133,113,64,39,46,221,38,81,66,62,253,16,192,226,2,51,52,95,29,214,185,86,221,42,89,5,38,46,68,37,44,43,59,248,237,222,171,63,59,52,35,4,1,224,216,168,25,33,34,29,32,221,40,38,75,220,26,74,181,105,32,7,245,247,142,59,110,198,49,162,56,23,51,17,17,194,151,224,21,180,168,69,62,109,176,222,64,93,121,73,177,118,255,253,48,61,56,9,185,41,9,254,196,43,42,136,33,41,33,216,194,169,29,14,0,32,32,30,65,128,120,144,101,39,241,127,15,64,240,248,124,40,119,226,2,118,173,100,41,39,166,15,21,37,9,60,24,239,166,139,7,235,142,88,39,};

namespace windmap {

  map<int, int> getid;
  vector<vector<int> > neighbors;
  vector<cellwalker> samples;

  int getId(cell *c) {
    auto i = fieldpattern::fieldval_uniq(c);
    return getid[i]-1;
    }
  
  int getId(cellwalker cw) {
    auto i = fieldpattern::fieldval_uniq(cw.at);
    auto &id = getid[i];
    if(id == 0) { samples.push_back(cw); id = isize(samples); }
    return id-1;
    }
  
  vector<unsigned char> windcodes;

  void wcheck(cell *a, cell *b) {
    int i = getId(a);
    if(b) {
      int j = getId(b);
      for(auto nn: neighbors[i]) if(nn == j) return;
      printf("neigbor not found!\n");
      }
    else {
      printf("%d", windcodes[i]);
      for(auto nn: neighbors[i]) printf("n%d ", windcodes[nn]);
      printf("\n");
      }
    }

  void create() {
    samples.clear();
    neighbors.clear();
    getid.clear();
    getId(cellwalker(currentmap->gamestart(), 0));
    for(int k=0; k<isize(samples); k++) {
      cellwalker cw = samples[k];
      // cw.spin = 0;
      neighbors.emplace_back();
      auto &v = neighbors.back();
      if(NONSTDVAR && !sphere && !archimedean)
        for(int l=0; l<S7; l++) {
          v.push_back(getId(cw + cth + l + wstep + cth));
          }
      else
        for(int l=0; l<cw.at->type; l++) v.push_back(getId(cw+l+wstep));
      }
    
    int N = isize(samples);
    
    int* precomp = NULL;

    windcodes.resize(N);
    
    if(N == 18920) precomp = windcodes18920;
    if(N == 5676) precomp = windcodes5676;
    
    if(precomp && hyperbolic && isize(currfp.matrices)) {
      int randval = hrand(isize(currfp.matrices));
      for(int i=0; i<N; i++)
        windcodes[i] = precomp[getid[fieldpattern::fieldval_uniq_rand(samples[i].at, randval)]-1];
      return;
      }
    
    int tries = 0;
    int maxtries = specialland == laVolcano || specialland == laBlizzard || chaosmode ? 20 : 1;
    tryagain:

    for(int i=0; i<N; i++) windcodes[i] = hrand(256);
    
    vector<bool> inqueue(N, true);
    vector<int> tocheck;
    for(int i=0; i<N; i++) tocheck.push_back(i);
    hrandom_shuffle(&tocheck[0], isize(tocheck));
    
    for(int a=0; a<isize(tocheck); a++) {
      if(a >= 200*N) { printf("does not converge\n"); break; }
      int bestval = 1000000000, best = 0;
      int i = tocheck[a];
      for(int k=0; k<256; k++) {
        int j = windcodes[i] + k;
        int cval = 0;
        for(int c2: neighbors[i]) {
          int d = (j - windcodes[c2]) & 255;
          if(d > 128) d = 256 - d;
          cval += d*d;
          }
        if(cval < bestval) bestval = cval, best = j;
        }
      if(windcodes[i] != best) 
        for(int c2: neighbors[i]) 
          if(!inqueue[c2])
            inqueue[c2] = true, tocheck.push_back(c2);
      inqueue[i] = false;
      windcodes[i] = best;
      }
    
    int ingroup[4];
    for(int u=0; u<4; u++) ingroup[u] = 0;
    for(int i=0; i<N; i++) ingroup[windcodes[i] >> 6]++;
    for(int u=0; u<4; u++) if(!ingroup[u]) {
      tries++;
      if(tries < maxtries) goto tryagain;
      }
    if(tries >= maxtries && maxtries >= 20) {
      addMessage("Failed to generate an interesting wind/lava pattern.");
      }
    else if(false) {
      printf("tocheck size = %d\n", isize(tocheck));
      printf("if(N == %d) {\n", N);
      printf("  windcodes = {");
      for(int i=0; i<N; i++) printf("%d,", windcodes[i]);
      printf("};\n");
      printf("  return;\n");
      printf("  }\n");
      }
    }
  
  int at(cell *c) {
    return windmap::windcodes[windmap::getId(c)];
    }

  }

// Halloween namespace

namespace halloween {
  cell *dragoncells[4];
  vector<cell*> srch;

  cell *farempty(bool lastresort = false) {
    int maxdist = 0;
    vector<cell*> validcells;
    int firstfar1 = 0;
    for(int i=1; i<isize(dcal); i++) {
      bool okay = 
        dcal[i]->item == itNone && dcal[i]->monst == moNone && dcal[i]->wall == waNone;
      if(lastresort)
        okay = dcal[i]->wall != waChasm && !isMultitile(dcal[i]->monst);
      if(okay) {
        if(dcal[i]->cpdist > maxdist) 
          firstfar1 = isize(validcells),
          maxdist = dcal[i]->cpdist; 
        validcells.push_back(dcal[i]);
        }
      }
    
    int qvc = isize(validcells);
    if(qvc == firstfar1) return farempty(true);
    
    return validcells[firstfar1 + hrand(qvc - firstfar1)];
    }
  
  int demoncount;
  int swordpower;
  int dragoncount;

  void reset() {
    demoncount = 0;
    swordpower = 0;
    dragoncount = 0;
    }
  
  eMonster nextDemon() {
    demoncount++;
    if(demoncount % 9 == 0) return moGreater;
    return moLesser;
    }
  
  void putMonster(eMonster m) {
    cell *c = farempty();
    c->hitpoints = 3;
    c->monst = m;
    playSeenSound(c);
    if(!kills[m]) switch(m) {
      case moGhost:
        addMessage(XLAT("Ghosts can move through chasms!"));
        break;
      case moSkeleton:
        addMessage(XLAT("Push Skeletons into the holes!"));
        break;
      case moDraugr:
        addMessage(XLAT("You'll need your magical sword against the Draugar!"));
        break;
      case moLesser:
        addMessage(XLAT("Demons are slow, but you'll need the experience against stronger ones..."));
        break;
      case moGreater:
        addMessage(XLAT("You will need more experience to defeat the Greater Demon!"));
        break;
      case moPyroCultist:
        addMessage(XLAT("Cultists throw fire at you from distance!"));
        break;
      case moFlailer:
        addMessage(XLAT("Defeat Flail Guards by moving away from them."));
        break;
      case moVampire:
        addMessage(XLAT("Vampire Bats drain your magical powers!"));
        break;
      default: break;
      }
    c->stuntime = 2;
    }
  
  void getTreat(cell *where) {
    if(!items[itTreat]) reset();
    gainItem(itTreat);
    farempty()->item = itTreat;
    int itr = items[itTreat];
    items[itOrbTime] += 30;
    int monpower = 19 + itr + hrand(itr);
    int mcount = 0;
    while(monpower > 0) {
      int id = hrand(10000);
    
#define CHANCE(x) (id -= x, id < 0)
      if(CHANCE(400) && itr >= 5) {
        putMonster(moGhost);
        monpower -= 30;
        mcount++;
        }
      else if(CHANCE(400)) {
        putMonster(pick(moWitch, moZombie));
        monpower -= 20;
        mcount++;
        }
      else if(CHANCE(400) && itr >= 5) {
        putMonster(nextDemon());
        monpower -= 10;
        mcount++;
        }
      else if(CHANCE(100) && itr >= 12) {
        putMonster(moVampire);
        monpower -= 10;
        swordpower -= 5;
        if(swordpower < 0) swordpower = 0;
        mcount++;
        }
      else if(CHANCE(400) && swordpower > 0 && !mcount && itr >= 15) {
        putMonster(moDraugr);
        swordpower -= 3;
        monpower -= 100;
        mcount++;
        }
      else if(CHANCE(400) && itr >= 10 && !mcount && itr >= 10) {
        putMonster(moSkeleton);
        monpower -= 60;
        mcount++;
        }
      else if(CHANCE(10) && itr >= 15) {
        putMonster(moWitchFire);
        monpower -= 35;
        mcount++;
        }
      else if(CHANCE(100) && itr >= 5) {
        putMonster(moFlailer);
        monpower -= 35;
        mcount++;
        }
      else if(CHANCE(100) && itr >= 5) {
        putMonster(moPyroCultist);
        monpower -= 35;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 20 && kills[moSkeleton]) {
        putMonster(moFatGuard);
        monpower -= 35;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 30 && kills[moFlailer]) {
        putMonster(moHedge);
        monpower -= 35;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 40 && kills[moHedge]) {
        putMonster(moLancer);
        monpower -= 60;
        mcount++;
        }        
      else if(CHANCE(1) && itr >= 50 && kills[moHedge]) {
        putMonster(moFireFairy);
        monpower -= 40;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 60) {
        putMonster(moBomberbird);
        monpower -= 25;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 60) {
        putMonster(moRatlingAvenger);
        monpower -= 30;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 60) {
        putMonster(moVineBeast);
        monpower -= 30;
        mcount++;
        }        
      else if(CHANCE(5) && itr >= 60) {
        dragoncount++;
        }
      else if(dragoncount && BITRUNCATED && !mcount) {
        bool fill = false;
        for(int i=0; i<4; i++) 
          if(!dragoncells[i] || dragoncells[i]->monst)
            fill = true;
        swap(dragoncells[0], dragoncells[3]);
        swap(dragoncells[1], dragoncells[2]);
        if(fill) continue;
        for(int i=0; i<4; i++) {
          dragoncells[i]->monst = i ? moDragonTail : moDragonHead;
          dragoncells[i]->mondir = i==3 ? NODIR : neighborId(dragoncells[i], dragoncells[i+1]);
          dragoncells[i]->hitpoints = 1;
          dragoncells[i]->stuntime = 1;          
          playSeenSound(dragoncells[i]);
          }
        monpower -= 200;
        mcount++;
        dragoncount--;
        }        
      }
    int id = hrand(100);
    if(items[itTreat] == 1) {
#if ISMOBILE==0
      addMessage(XLAT("Hint: use arrow keys to scroll."));
#endif
      }
    else if(items[itTreat] == 2) {
#if ISMOBILE==0
      addMessage(XLAT("Hint: press 1 2 3 4 to change the projection."));
#endif
      }
    else if(items[itTreat] == 3) {
      items[itOrbShell] += 20;
      addMessage(XLAT("You gain a protective Shell!"));
      }                                         
    else if(items[itTreat] == 4) {
      items[itOrbShell] += 10;
      addMessage(XLAT("Hint: magical powers from Treats expire after a number of uses."));
      }
    else if(kills[moSkeleton] && CHANCE(10)) {
      addMessage(XLAT("A magical energy sword. Don't waste its power!"));
      items[itOrbSword] += 5; // todo facing
      swordpower += 5;
      }
    else if(kills[moDraugr] && items[itOrbSword] && CHANCE(10)) {
      addMessage(XLAT("Another energy sword!"));
      items[itOrbSword2] += 5;
      swordpower += 5;
      }
    else if(kills[moFlailer] && CHANCE(10)) {
      items[itOrbThorns] += 5;
      addMessage(XLAT("You got Thorns! Stab monsters by moving around them."));
      }
    else if(kills[moGhost] && CHANCE(10)) {
      items[itOrbAether] += 5;
      addMessage(XLAT("Aethereal powers let you go through the holes."));
      }
    else { 
      if(items[itOrbShell] > ORBBASE)
        addMessage(XLAT("The tasty treat increases your protection."));
      else 
        addMessage(XLAT("You gain your protective Shell back!"));
      items[itOrbShell] += 5;
      }
    }
  }

// ... also includes the Ivory Tower

namespace dungeon {

  void towerError(cell *c) {
    // only care in the standard geometry -- weird ones are intentionally left buggy
    if(!weirdhyperbolic && !sphere && !quotient) 
      raiseBuggyGeneration(c, "ivory tower/dungeon generation error");
    }

  void buildIvoryTower(cell *c) {
    /* if(int(c->landparam) % 5 == 0) 
      c->wall = waCamelot;
      */
    
    if(euclid) {
      if(euwrap) return;
      int x, y;
      tie(x, y) = cell_to_pair(c);
      string tab6[] = {
        ".####...",
        "L...L...",
        ".L..L...",
        "L...L...",
        "........",
        "........"
        };
      string tab4[] = {
        "L####L..",
        "L....L..",
        "L....L..",
        "L....L..",
        "........",
        "........"
        };
      int y0 = y; if(y>32768) y0 -= 65536;
      
      y0 += 5; y0 %= 12; if(y0<0) y0+=12;
      
      if(y0 >= 6) { y0 -= 6; x += 4; }
      
      char ch = euclid6 ? tab6[y0][(x+(y+1)/2)&7] : tab4[y0][x&7];
      
      if(ch == '#')
        c->wall = waPlatform;
      else if(ch == 'L')
        c->wall = waLadder;
      }
    
    else if(true) {
      
      cell *c2 = c;
      cell *c3 = c;
      
      bool rdepths[5];
      for(int i=0; i<5; i++) {
        if(coastvalEdge(c2) == 0) { 
          rdepths[i] = false;
          }
        else {
          cell *c4 = c2;
          if(c2 != c3 && !isNeighbor(c2, c3)) {
            for(int i=0; i<c2->type; i++) if(c2->move(i) && isNeighbor(c2->move(i), c3))
              c4 = c2->move(i);
            }
          rdepths[i] = c2 && c3 && c4 && (c2->landflags == 3 || c3->landflags == 3 || c4->landflags == 3);
          if(c2) generate_around(c2);
          if(c3) generate_around(c3);
          c2 = ts::left_parent(c2, coastvalEdge);
          c3 = ts::right_parent(c3, coastvalEdge);
          if(!c2) { towerError(c); return; }
          if(!c3) { towerError(c); return; }
          }
        }
      
      if(rdepths[3]) {
        c->wall = waPlatform;
  //        if(!c4->item) c4->item = itPalace;
        }
      else if(!rdepths[2] && !rdepths[4] && !rdepths[1]) {
        c2 = c;
        c3 = c;
        generate_around(c);
        cell *c4 = ts::left_of(c, coastvalEdge);
        cell *c5 = ts::right_of(c, coastvalEdge);
        for(int i=0; i<3; i++) {
          if(coastvalEdge(c2) == 0) break;
          for(cell *cx: {c2, c3, c4, c5}) if(cx) generate_around(cx);

          if(c2 && c4 && c4->landflags == 3 && c2->landflags != 3 && c4 == ts::left_of(c2, coastvalEdge))
            c->wall = waLadder;
          if(c3 && c5 && c5->landflags == 3 && c3->landflags != 3 && c5 == ts::right_of(c3, coastvalEdge))
            c->wall = waLadder;
          buildEquidistant(c4); buildEquidistant(c5);
          if(c2) c2 = ts::left_parent(c2, coastvalEdge);
          if(c3) c3 = ts::right_parent(c3, coastvalEdge);
          if(c4) c4 = ts::left_parent(c4, coastvalEdge);
          if(c5) c5 = ts::right_parent(c5, coastvalEdge);
          }
        }
      }
    else c->wall = waCIsland;
    }
  
  int dungeonFlags(cell *c) {
    if(!c) return 0;
    buildEquidistant(c);
    bool rdepths[5];
  
    cell *c2 = c;
    cell *c3 = c;
      
    int switchcount = 0;
    for(int i=0; i<5; i++) {
      if(coastvalEdge(c2) == 0) { 
        rdepths[i] = false;
        }
      else {
        cell *c4 = c2;
        if(c2 != c3 && !isNeighbor(c2, c3)) {
          for(int i=0; i<c2->type; i++) if(c2->move(i) && isNeighbor(c2->move(i), c3))
            c4 = c2->move(i);
          }
        rdepths[i] = c2 && c3 && c4 && (c2->landflags == 3 || c3->landflags == 3 || c4->landflags == 3);
        if((c2&&c2->landflags == 1) || (c3&&c3->landflags == 1) || (c4&&c4->landflags == 1))
          switchcount++;
        generate_around(c2);
        generate_around(c3);
        c2 = ts::left_parent(c2, coastvalEdge);
        c3 = ts::right_parent(c3, coastvalEdge);
        if(!c2) { towerError(c); return 0; }
        if(!c3) { towerError(c); return 0; }
        }
      }
    
    int res = 0;
    
    if(rdepths[3]) res |= 1;
    if(rdepths[2]) res |= 2;
    if(switchcount&1) res |= 4;
    
    return res;
    }
  
  void placeGate(cell *c, eWall w) {
    if(w == waOpenGate) {
      c->wall = waClosedGate;
      toggleGates(c, waOpenPlate, 0);
      }
    if(w == waClosedGate) {
      c->wall = waOpenGate;
      toggleGates(c, waClosePlate, 0);
      }
    }
  
  bool isGate(eWall w) {
    return w == waOpenGate || w == waClosedGate;
    }
  
  void placeRandomGate(cell *c) {
    placeGate(c, hrand(2) ? waOpenGate : waClosedGate);
    }
  
  void build(cell *c) {
    /* if(int(c->landparam) % 5 == 0) 
      c->wall = waCamelot;
      */
    
    if(true) {
      
      if(coastvalEdge(c) == 1) forCellEx(c2, c)
        if(c2->land != laBarrier && c2->land != laDungeon) {
          c->wall = waLadder;
          c->wparam = 3;
          }
        
      int df = dungeonFlags(c);
      
      if(df&1) {
        generate_around(c);
        int df1 = dungeonFlags(ts::left_of(c, coastvalEdge));
        int df2 = dungeonFlags(ts::right_of(c, coastvalEdge));
        
        c->wparam = 0;
        if(hrand(100) < (c->landparam % 5 == 0 ? 80 : 20)) {
          if(!(df1&1)) c->wparam = 1;
          if(!(df2&1)) c->wparam = 2;
          }
  
        if(df&4) 
          placeRandomGate(c);
        else if(c->wparam == 0 && c->landparam % 5 == 0 &&  hrand(100) < 10) {
          c->wall = waLadder;
          c->wparam = 3 + hrand(2);
          }
        else 
          c->wall = waPlatform;
        }
  
      if(c->wparam) {
        /* int q = 0;
        cell* downs[MAX_EDGE];
        forCellEx(c2, c) {
          buildEquidistant(c2);
          if(coastvalEdge(c2) > coastvalEdge(c)) downs[q++] = c2;
          }
        if(q) downs[hrand(q)]->wall = waLadder;
        */
        cell *c2 = 
          c->wparam == 1 ? ts::add(c, 1, 2, coastvalEdge) :
          c->wparam == 2 ? ts::add(c, -1, -2, coastvalEdge) :
          c->wparam == 3 ? ts::add(c, 1, 3, coastvalEdge) :
          c->wparam == 4 ? ts::add(c, -1, -3, coastvalEdge) :
          NULL;
        
        if(c2) {
          c2->wall = c->wall, c2->wparam = c->wparam;
          if(c2->wall == waPlatform && hrand(10) < 2) 
            placeRandomGate(c2);
          if(isGate(c2->wall) && hrand(10) < 2) 
            c2->wall = waPlatform;
          }
        }
      }
    else c->wall = waCIsland;
    }
  
  void buildPlates(cell *c) {
    if(c->wall) return;
    int neargate = 0;
    int neargateDown = 0;
    int neargateEq = 0;
    int qup = 0;
    forCellEx(c2, c) {
      int d = coastvalEdge(c2) - coastvalEdge(c);
      if(isGate(c2->wall)) {
        neargate++;
        if(d>0) neargateDown++;
        if(d==0) neargateEq = 0;
        }
      if(d<0) qup++;
      }
    
    if(!neargate) return;
    
    int hr = 99;
    
    if(neargate == neargateDown && qup == 1)
      hr = hrand(12);
    else if((zebra40(c) >= 40) && !(neargateEq && neargateDown)) 
      hr = hrand(36);
    else if(zebra40(c) >= 40)
      hr = hrand(5000);
      
    if(hr < 5) c->wall = waClosePlate;
    else if(hr < 10) c->wall = waOpenPlate;
    }

  bool is02(int i) { return i == 0 || i == 2; }
  
  void all(cell *c, int d) {
    if(d == 8 && (c->land == laIvoryTower || c->land == laDungeon) && !euclid) {

      if(hrand(1000) < 75 && (c->landparam & 1) ) {
        c->landflags = 3;
        }
      else c->landflags = 0;
      }
    
    if(d == 8 && c->land == laDungeon && !euclid) {
      if(hrand(1000) < 240 && is02(c->landparam%5) ) {
        c->landflags = 3;
        }
      else if(hrand(1000) < 90)
        c->landflags = 1;
      else c->landflags = 0;
      }

    if(d == 7 && c->land == laIvoryTower) buildIvoryTower(c);
    if(d == 8 && c->land == laDungeon) build(c);
    if(d == 7 && c->land == laDungeon) buildPlates(c);
    }
  }

}