variants/Chakart/class.js

   1 import ChessRules from "/base_rules.js";
   2 import GiveawayRules from "/variants/Giveaway/class.js";
   3 import { ArrayFun } from "/utils/array.js";
   4 import { Random } from "/utils/alea.js";
   5 import PiPo from "/utils/PiPo.js";
   6 import Move from "/utils/Move.js";
   7
   8 export default class ChakartRules extends ChessRules {
   9
  10   static get Options() {
  11     return {
  12       select: [
  13         {
  14           label: "Randomness",
  15           variable: "randomness",
  16           defaut: 2,
  17           options: [
  18             {label: "Deterministic", value: 0},
  19             {label: "Symmetric random", value: 1},
  20             {label: "Asymmetric random", value: 2}
  21           ]
  22         }
  23       ],
  24       styles: ["cylinder"]
  25     };
  26   }
  27
  28   get pawnPromotions() {
  29     return ['q', 'r', 'n', 'b', 'k'];
  30   }
  31
  32   get hasCastle() {
  33     return false;
  34   }
  35   get hasEnpassant() {
  36     return false;
  37   }
  38   get hasReserve() {
  39     return true;
  40   }
  41   get hasReserveFen() {
  42     return false;
  43   }
  44
  45   static get IMMOBILIZE_CODE() {
  46     return {
  47       'p': 's',
  48       'r': 'u',
  49       'n': 'o',
  50       'b': 'c',
  51       'q': 't',
  52       'k': 'l'
  53     };
  54   }
  55
  56   static get IMMOBILIZE_DECODE() {
  57     return {
  58       's': 'p',
  59       'u': 'r',
  60       'o': 'n',
  61       'c': 'b',
  62       't': 'q',
  63       'l': 'k'
  64     };
  65   }
  66
  67   // Fictive color 'a', bomb banana mushroom egg
  68   static get BOMB() {
  69     return 'w'; //"Wario"
  70   }
  71   static get BANANA() {
  72     return 'd'; //"Donkey"
  73   }
  74   static get EGG() {
  75     return 'e';
  76   }
  77   static get MUSHROOM() {
  78     return 'm';
  79   }
  80
  81   static get EGG_SURPRISE() {
  82     return [
  83       "kingboo", "bowser", "daisy", "koopa",
  84       "luigi", "waluigi", "toadette", "chomp"];
  85   }
  86
  87   canIplay(x, y) {
  88     if (
  89       this.playerColor != this.turn ||
  90       Object.keys(V.IMMOBILIZE_DECODE).includes(this.getPiece(x, y))
  91     ) {
  92       return false;
  93     }
  94     return this.egg == "kingboo" || this.getColor(x, y) == this.turn;
  95   }
  96
  97   pieces(color, x, y) {
  98     const specials = {
  99       'i': {"class": "invisible"}, //queen
 100       '?': {"class": "mystery"}, //...initial square
 101       'e': {"class": "egg"},
 102       'm': {"class": "mushroom"},
 103       'd': {"class": "banana"},
 104       'w': {"class": "bomb"},
 105       'z': {"class": "remote-capture"}
 106     };
 107     const bowsered = {
 108       's': {"class": ["immobilized", "pawn"]},
 109       'u': {"class": ["immobilized", "rook"]},
 110       'o': {"class": ["immobilized", "knight"]},
 111       'c': {"class": ["immobilized", "bishop"]},
 112       't': {"class": ["immobilized", "queen"]},
 113       'l': {"class": ["immobilized", "king"]}
 114     };
 115     return Object.assign(
 116       {
 117         'y': {
 118           // Virtual piece for "king remote shell captures"
 119           moves: [],
 120           attack: [
 121             {
 122               steps: [
 123                 [0, 1], [0, -1], [1, 0], [-1, 0],
 124                 [1, 1], [1, -1], [-1, 1], [-1, -1]
 125               ]
 126             }
 127           ]
 128         }
 129       },
 130       specials, bowsered, super.pieces(color, x, y));
 131   }
 132
 133   genRandInitFen(seed) {
 134     const options = Object.assign({mode: "suicide"}, this.options);
 135     const gr = new GiveawayRules({options: options, genFenOnly: true});
 136     const baseFen = gr.genRandInitFen(seed);
 137     const fenParts = baseFen.split(" ");
 138     let others = JSON.parse(fenParts[3]);
 139     delete others["enpassant"];
 140     others["flags"] = "1111"; //Peach + Mario flags
 141     return fenParts.slice(0, 3).join(" ") + " " + JSON.stringify(others);
 142   }
 143
 144   fen2board(f) {
 145     return (
 146       f.charCodeAt() <= 90
 147         ? "w" + f.toLowerCase()
 148         : (['w', 'd', 'e', 'm'].includes(f) ? "a" : "b") + f
 149     );
 150   }
 151
 152   setFlags(fenflags) {
 153     // King can send shell? Queen can be invisible?
 154     this.powerFlags = {
 155       w: {k: false, q: false},
 156       b: {k: false, q: false}
 157     };
 158     for (let c of ['w', 'b']) {
 159       for (let p of ['k', 'q']) {
 160         this.powerFlags[c][p] =
 161           fenflags.charAt((c == "w" ? 0 : 2) + (p == 'k' ? 0 : 1)) == "1";
 162       }
 163     }
 164   }
 165
 166   aggregateFlags() {
 167     return this.powerFlags;
 168   }
 169
 170   disaggregateFlags(flags) {
 171     this.powerFlags = flags;
 172   }
 173
 174   getFlagsFen() {
 175     return ['w', 'b'].map(c => {
 176       return ['k', 'q'].map(p => this.powerFlags[c][p] ? "1" : "0").join("");
 177     }).join("");
 178   }
 179
 180   setOtherVariables(fenParsed) {
 181     super.setOtherVariables(fenParsed);
 182     this.egg = null;
 183     // Change seed (after FEN generation!!)
 184     // so that further calls differ between players:
 185     Random.setSeed(Math.floor(19840 * Math.random()));
 186   }
 187
 188   initReserves() {
 189     this.reserve = {}; //to be filled later
 190   }
 191
 192   canStepOver(i, j) {
 193     return (
 194       this.board[i][j] == "" ||
 195       ['i', V.EGG, V.MUSHROOM].includes(this.getPiece(i, j))
 196     );
 197   }
 198
 199   // For Toadette bonus
 200   canDrop([c, p], [i, j]) {
 201     return (
 202       (
 203         this.board[i][j] == "" ||
 204         this.getColor(i, j) == 'a' ||
 205         this.getPiece(i, j) == 'i'
 206       )
 207       &&
 208       (p != "p" || (c == 'w' && i < this.size.x - 1) || (c == 'b' && i > 0))
 209     );
 210   }
 211
 212   getPotentialMovesFrom([x, y]) {
 213     let moves = [];
 214     const piece = this.getPiece(x, y);
 215     if (this.egg == "toadette")
 216       moves = this.getDropMovesFrom([x, y]);
 217     else if (this.egg == "kingboo") {
 218       const color = this.turn;
 219       const oppCol = C.GetOppCol(color);
 220       // Only allow to swap (non-immobilized!) pieces
 221       for (let i=0; i<this.size.x; i++) {
 222         for (let j=0; j<this.size.y; j++) {
 223           const colIJ = this.getColor(i, j);
 224           const pieceIJ = this.getPiece(i, j);
 225           if (
 226             (i != x || j != y) &&
 227             ['w', 'b'].includes(colIJ) &&
 228             !Object.keys(V.IMMOBILIZE_DECODE).includes(pieceIJ) &&
 229             // Next conditions = no pawn on last rank
 230             (
 231               piece != 'p' ||
 232               (
 233                 (color != 'w' || i != 0) &&
 234                 (color != 'b' || i != this.size.x - 1)
 235               )
 236             )
 237             &&
 238             (
 239               pieceIJ != 'p' ||
 240               (
 241                 (colIJ != 'w' || x != 0) &&
 242                 (colIJ != 'b' || x != this.size.x - 1)
 243               )
 244             )
 245           ) {
 246             let m = this.getBasicMove([x, y], [i, j]);
 247             m.appear.push(new PiPo({x: x, y: y, p: pieceIJ, c: colIJ}));
 248             m.kingboo = true; //avoid some side effects (bananas/bombs)
 249             moves.push(m);
 250           }
 251         }
 252       }
 253     }
 254     else {
 255       // Normal case (including bonus daisy)
 256       switch (piece) {
 257         case 'p':
 258           moves = this.getPawnMovesFrom([x, y]); //apply promotions
 259           break;
 260         case 'q':
 261           moves = this.getQueenMovesFrom([x, y]);
 262           break;
 263         case 'k':
 264           moves = this.getKingMovesFrom([x, y]);
 265           break;
 266         case 'n':
 267           moves = this.getKnightMovesFrom([x, y]);
 268           break;
 269         case 'b':
 270         case 'r':
 271           // Explicitely listing types to avoid moving immobilized piece
 272           moves = this.getPotentialMovesOf(piece, [x, y]);
 273           break;
 274       }
 275     }
 276     return moves;
 277   }
 278
 279   getPawnMovesFrom([x, y]) {
 280     const color = this.turn;
 281     const oppCol = C.GetOppCol(color);
 282     const shiftX = (color == 'w' ? -1 : 1);
 283     const firstRank = (color == "w" ? this.size.x - 1 : 0);
 284     let moves = [];
 285     const frontPiece = this.getPiece(x + shiftX, y);
 286     if (
 287       this.board[x + shiftX][y] == "" ||
 288       this.getColor(x + shiftX, y) == 'a' ||
 289       frontPiece == 'i'
 290     ) {
 291       moves.push(this.getBasicMove([x, y], [x + shiftX, y]));
 292       if (
 293         [firstRank, firstRank + shiftX].includes(x) &&
 294         ![V.BANANA, V.BOMB].includes(frontPiece) &&
 295         (
 296           this.board[x + 2 * shiftX][y] == "" ||
 297           this.getColor(x + 2 * shiftX, y) == 'a' ||
 298           this.getPiece(x + 2 * shiftX, y) == 'i'
 299         )
 300       ) {
 301         moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y]));
 302       }
 303     }
 304     for (let shiftY of [-1, 1]) {
 305       const nextY = this.getY(y + shiftY);
 306       if (
 307         nextY >= 0 &&
 308         nextY < this.size.y &&
 309         this.board[x + shiftX][nextY] != "" &&
 310         // Pawns cannot capture invisible queen this way!
 311         this.getPiece(x + shiftX, nextY) != 'i' &&
 312         ['a', oppCol].includes(this.getColor(x + shiftX, nextY))
 313       ) {
 314         moves.push(this.getBasicMove([x, y], [x + shiftX, nextY]));
 315       }
 316     }
 317     this.pawnPostProcess(moves, color, oppCol);
 318     // Add mushroom on before-last square (+ potential segments)
 319     moves.forEach(m => {
 320       let [mx, my] = [x, y];
 321       if (Math.abs(m.end.x - m.start.x) == 2)
 322         mx = (m.start.x + m.end.x) / 2;
 323       m.appear.push(new PiPo({x: mx, y: my, c: 'a', p: 'm'}));
 324       if (mx != x && this.board[mx][my] != "") {
 325         m.vanish.push(new PiPo({
 326           x: mx,
 327           y: my,
 328           c: this.getColor(mx, my),
 329           p: this.getPiece(mx, my)
 330         }));
 331       }
 332       if (Math.abs(m.end.y - m.start.y) > 1) {
 333         m.segments = [
 334           [[x, y], [x, y]],
 335           [[m.end.x, m.end.y], [m.end.x, m.end.y]]
 336         ];
 337       }
 338     });
 339     return moves;
 340   }
 341
 342   getKnightMovesFrom([x, y]) {
 343     // Add egg on initial square:
 344     return this.getPotentialMovesOf('n', [x, y]).map(m => {
 345       m.appear.push(new PiPo({p: "e", c: "a", x: x, y: y}));
 346       return m;
 347     });
 348   }
 349
 350   getQueenMovesFrom(sq) {
 351     const normalMoves = this.getPotentialMovesOf('q', sq);
 352     // If flag allows it, add 'invisible movements'
 353     let invisibleMoves = [];
 354     if (this.powerFlags[this.turn]['q']) {
 355       normalMoves.forEach(m => {
 356         if (
 357           m.appear.length == 1 &&
 358           m.vanish.length == 1 &&
 359           // Only simple non-capturing moves:
 360           m.vanish[0].c != 'a'
 361         ) {
 362           let im = JSON.parse(JSON.stringify(m));
 363           im.appear[0].p = 'i';
 364           im.noAnimate = true;
 365           invisibleMoves.push(im);
 366         }
 367       });
 368     }
 369     return normalMoves.concat(invisibleMoves);
 370   }
 371
 372   getKingMovesFrom([x, y]) {
 373     let moves = this.getPotentialMovesOf('k', [x, y]);
 374     // If flag allows it, add 'remote shell captures'
 375     if (this.powerFlags[this.turn]['k']) {
 376       let shellCaptures = this.getPotentialMovesOf('y', [x, y]);
 377       shellCaptures.forEach(sc => {
 378         sc.shell = true; //easier play()
 379         sc.choice = 'z'; //to display in showChoices()
 380         // Fix move (Rifle style):
 381         sc.vanish.shift();
 382         sc.appear.shift();
 383       });
 384       Array.prototype.push.apply(moves, shellCaptures);
 385     }
 386     return moves;
 387   }
 388
 389   play(move) {
 390     const color = this.turn;
 391     const oppCol = C.GetOppCol(color);
 392     if (
 393       move.appear.length > 0 &&
 394       move.appear[0].p == 'p' &&
 395       (
 396         (color == 'w' && move.end.x == 0) ||
 397         (color == 'b' && move.end.x == this.size.x - 1)
 398       )
 399     ) {
 400       // "Forgotten" promotion, which occurred after some effect
 401       let moves = [move];
 402       super.pawnPostProcess(moves, color, oppCol);
 403       super.showChoices(moves);
 404       return false;
 405     }
 406     this.postPlay(move, color, oppCol);
 407     return true;
 408   }
 409
 410   postPlay(move, color, oppCol) {
 411     this.egg = move.egg;
 412     if (move.egg == "toadette") {
 413       this.reserve = { w: {}, b: {} };
 414       // Randomly select a piece in pawnPromotions
 415       if (!move.toadette)
 416         move.toadette = Random.sample(this.pawnPromotions);
 417       this.reserve[color][move.toadette] = 1;
 418       this.re_drawReserve([color]);
 419     }
 420     else if (Object.keys(this.reserve).length > 0) {
 421       this.reserve = {};
 422       this.re_drawReserve([color]);
 423     }
 424     if (move.shell)
 425       this.powerFlags[color]['k'] = false;
 426     else if (move.appear.length > 0 && move.appear[0].p == 'i') {
 427       this.powerFlags[move.appear[0].c]['q'] = false;
 428       if (color == this.playerColor) {
 429         move.appear.push(
 430           new PiPo({x: move.start.x, y: move.start.y, c: color, p: '?'}));
 431       }
 432     }
 433     if (color == this.playerColor) {
 434       // Look for an immobilized piece of my color: it can now move
 435       for (let i=0; i<8; i++) {
 436         for (let j=0; j<8; j++) {
 437           if ((i != move.end.x || j != move.end.y) && this.board[i][j] != "") {
 438             const piece = this.getPiece(i, j);
 439             if (
 440               this.getColor(i, j) == color &&
 441               Object.keys(V.IMMOBILIZE_DECODE).includes(piece)
 442             ) {
 443               move.vanish.push(new PiPo({
 444                 x: i, y: j, c: color, p: piece
 445               }));
 446               move.appear.push(new PiPo({
 447                 x: i, y: j, c: color, p: V.IMMOBILIZE_DECODE[piece]
 448               }));
 449             }
 450           }
 451         }
 452       }
 453       // Also make opponent invisible queen visible again, if any
 454       for (let i=0; i<8; i++) {
 455         for (let j=0; j<8; j++) {
 456           if (
 457             this.board[i][j] != "" &&
 458             this.getColor(i, j) == oppCol
 459           ) {
 460             const pieceIJ = this.getPiece(i, j);
 461             if (pieceIJ == 'i') {
 462               move.vanish.push(new PiPo({x: i, y: j, c: oppCol, p: 'i'}));
 463               move.appear.push(new PiPo({x: i, y: j, c: oppCol, p: 'q'}));
 464             }
 465             else if (pieceIJ == '?')
 466               move.vanish.push(new PiPo({x: i, y: j, c: oppCol, p: '?'}));
 467           }
 468         }
 469       }
 470     }
 471     this.playOnBoard(move);
 472     super.postPlay(move);
 473   }
 474
 475   playVisual(move, r) {
 476     super.playVisual(move, r);
 477     if (move.egg)
 478       this.displayBonus(move);
 479   }
 480
 481   computeNextMove(move) {
 482     // Set potential random effects, so that play() is deterministic
 483     // from opponent viewpoint:
 484     const endPiece = this.getPiece(move.end.x, move.end.y);
 485     switch (endPiece) {
 486       case V.EGG:
 487         move.egg = Random.sample(V.EGG_SURPRISE);
 488         move.next = this.getEggEffect(move);
 489         break;
 490       case V.MUSHROOM:
 491         move.next = this.getMushroomEffect(move);
 492         break;
 493       case V.BANANA:
 494       case V.BOMB:
 495         move.next = this.getBombBananaEffect(move, endPiece);
 496         break;
 497     }
 498     // NOTE: Chakart has also some side-effects:
 499     if (
 500       !move.next && move.appear.length > 0 &&
 501       !move.kingboo && !move.luigiEffect
 502     ) {
 503       const movingPiece = move.appear[0].p;
 504       if (['b', 'r'].includes(movingPiece)) {
 505         // Drop a banana or bomb:
 506         const bs =
 507           this.getRandomSquare([move.end.x, move.end.y],
 508             movingPiece == 'r'
 509               ? [[1, 1], [1, -1], [-1, 1], [-1, -1]]
 510               : [[1, 0], [-1, 0], [0, 1], [0, -1]],
 511             "freeSquare");
 512         if (bs) {
 513           move.appear.push(
 514             new PiPo({
 515               x: bs[0],
 516               y: bs[1],
 517               c: 'a',
 518               p: movingPiece == 'r' ? 'd' : 'w'
 519             })
 520           );
 521           if (this.board[bs[0]][bs[1]] != "") {
 522             move.vanish.push(
 523               new PiPo({
 524                 x: bs[0],
 525                 y: bs[1],
 526                 c: this.getColor(bs[0], bs[1]),
 527                 p: this.getPiece(bs[0], bs[1])
 528               })
 529             );
 530           }
 531         }
 532       }
 533     }
 534   }
 535
 536   isLastMove(move) {
 537     return !move.next && !["daisy", "toadette", "kingboo"].includes(move.egg);
 538   }
 539
 540   // Helper to set and apply banana/bomb effect
 541   getRandomSquare([x, y], steps, freeSquare) {
 542     let validSteps = steps.filter(s => this.onBoard(x + s[0], y + s[1]));
 543     if (freeSquare) {
 544       // Square to put banana/bomb cannot be occupied by a piece
 545       validSteps = validSteps.filter(s => {
 546         return ["", 'a'].includes(this.getColor(x + s[0], y + s[1]))
 547       });
 548     }
 549     if (validSteps.length == 0)
 550       return null;
 551     const step = validSteps[Random.randInt(validSteps.length)];
 552     return [x + step[0], y + step[1]];
 553   }
 554
 555   getEggEffect(move) {
 556     const getRandomPiece = (c) => {
 557       let bagOfPieces = [];
 558       for (let i=0; i<this.size.x; i++) {
 559         for (let j=0; j<this.size.y; j++) {
 560           if (this.getColor(i, j) == c && this.getPiece(i, j) != 'k')
 561             bagOfPieces.push([i, j]);
 562         }
 563       }
 564       if (bagOfPieces.length >= 1)
 565         return Random.sample(bagOfPieces);
 566       return null;
 567     };
 568     const color = this.turn;
 569     let em = null;
 570     switch (move.egg) {
 571       case "luigi":
 572       case "waluigi":
 573         // Change color of friendly or enemy piece, king excepted
 574         const oldColor = (move.egg == "waluigi" ? color : C.GetOppCol(color));
 575         const newColor = C.GetOppCol(oldColor);
 576         const coords = getRandomPiece(oldColor);
 577         if (coords) {
 578           const piece = this.getPiece(coords[0], coords[1]);
 579           em = new Move({
 580             appear: [
 581               new PiPo({x: coords[0], y: coords[1], c: newColor, p: piece})
 582             ],
 583             vanish: [
 584               new PiPo({x: coords[0], y: coords[1], c: oldColor, p: piece})
 585             ]
 586           });
 587           em.luigiEffect = true; //avoid dropping bomb/banana by mistake
 588         }
 589         break;
 590       case "bowser":
 591         em = new Move({
 592           appear: [
 593             new PiPo({
 594               x: move.end.x,
 595               y: move.end.y,
 596               c: color,
 597               p: V.IMMOBILIZE_CODE[move.appear[0].p]
 598             })
 599           ],
 600           vanish: [
 601             new PiPo({
 602               x: move.end.x,
 603               y: move.end.y,
 604               c: color,
 605               p: move.appear[0].p
 606             })
 607           ]
 608         });
 609         break;
 610       case "koopa":
 611         // Reverse move
 612         em = new Move({
 613           appear: [
 614             new PiPo({
 615               x: move.start.x, y: move.start.y, c: color, p: move.appear[0].p
 616             })
 617           ],
 618           vanish: [
 619             new PiPo({
 620               x: move.end.x, y: move.end.y, c: color, p: move.appear[0].p
 621             })
 622           ]
 623         });
 624         if (this.board[move.start.x][move.start.y] != "") {
 625           // Pawn or knight let something on init square
 626           em.vanish.push(new PiPo({
 627             x: move.start.x,
 628             y: move.start.y,
 629             c: 'a',
 630             p: this.getPiece(move.start.x, move.start.y)
 631           }));
 632         }
 633         break;
 634       case "chomp":
 635         // Eat piece
 636         em = new Move({
 637           appear: [],
 638           vanish: [
 639             new PiPo({
 640               x: move.end.x, y: move.end.y, c: color, p: move.appear[0].p
 641             })
 642           ],
 643           end: {x: move.end.x, y: move.end.y}
 644         });
 645         break;
 646     }
 647     if (em && move.egg != "koopa")
 648       em.noAnimate = true; //static move
 649     return em;
 650   }
 651
 652   getMushroomEffect(move) {
 653     if (
 654       typeof move.start.x == "string" || //drop move (toadette)
 655       ['b', 'r', 'q'].includes(move.vanish[0].p) //slider
 656     ) {
 657       return null;
 658     }
 659     let step = [move.end.x - move.start.x, move.end.y - move.start.y];
 660     if (Math.abs(step[0]) == 2 && Math.abs(step[1]) == 0)
 661       // Pawn initial 2-squares move: normalize step
 662       step[0] /= 2;
 663     const nextSquare = [move.end.x + step[0], move.end.y + step[1]];
 664     let nextMove = null;
 665     if (
 666       this.onBoard(nextSquare[0], nextSquare[1]) &&
 667       (
 668         this.board[nextSquare[0]][nextSquare[1]] == "" ||
 669         this.getColor(nextSquare[0], nextSquare[1]) == 'a'
 670       )
 671     ) {
 672       this.playOnBoard(move); //HACK for getBasicMove()
 673       nextMove = this.getBasicMove([move.end.x, move.end.y], nextSquare);
 674       this.undoOnBoard(move);
 675     }
 676     return nextMove;
 677   }
 678
 679   getBombBananaEffect(move, item) {
 680     const steps = item == V.BANANA
 681       ? [[1, 0], [-1, 0], [0, 1], [0, -1]]
 682       : [[1, 1], [1, -1], [-1, 1], [-1, -1]];
 683     const nextSquare = this.getRandomSquare([move.end.x, move.end.y], steps);
 684     this.playOnBoard(move); //HACK for getBasicMove()
 685     const res = this.getBasicMove([move.end.x, move.end.y], nextSquare);
 686     this.undoOnBoard(move);
 687     return res;
 688   }
 689
 690   displayBonus(move) {
 691     let divBonus = document.createElement("div");
 692     divBonus.classList.add("bonus-text");
 693     divBonus.innerHTML = move.egg;
 694     let container = document.getElementById(this.containerId);
 695     container.appendChild(divBonus);
 696     setTimeout(() => container.removeChild(divBonus), 2000);
 697   }
 698
 699   atLeastOneMove() {
 700     return true;
 701   }
 702
 703   filterValid(moves) {
 704     return moves;
 705   }
 706
 707   // Kingboo bonus can be animated better:
 708   customAnimate(move, segments, cb) {
 709     if (!move.kingboo)
 710       return 0;
 711     super.animateMoving(move.end, move.start, null,
 712                         segments.reverse().map(s => s.reverse()), cb);
 713     return 1;
 714   }
 715
 716 };