| 1 | import { ArrayFun } from "@/utils/array"; |
| 2 | import { randInt } from "@/utils/alea"; |
| 3 | import { ChessRules, PiPo, Move } from "@/base_rules"; |
| 4 | |
| 5 | export class FullcavalryRules extends ChessRules { |
| 6 | |
| 7 | static get LANCER() { |
| 8 | return "l"; |
| 9 | } |
| 10 | |
| 11 | static get IMAGE_EXTENSION() { |
| 12 | // Temporarily, for the time SVG pieces are being designed: |
| 13 | return ".png"; |
| 14 | } |
| 15 | |
| 16 | // Lancer directions *from white perspective* |
| 17 | static get LANCER_DIRS() { |
| 18 | return { |
| 19 | 'c': [-1, 0], //north |
| 20 | 'd': [-1, 1], //N-E |
| 21 | 'e': [0, 1], //east |
| 22 | 'f': [1, 1], //S-E |
| 23 | 'g': [1, 0], //south |
| 24 | 'h': [1, -1], //S-W |
| 25 | 'm': [0, -1], //west |
| 26 | 'o': [-1, -1] //N-W |
| 27 | }; |
| 28 | } |
| 29 | |
| 30 | static get PIECES() { |
| 31 | return ChessRules.PIECES.concat(Object.keys(V.LANCER_DIRS)); |
| 32 | } |
| 33 | |
| 34 | getPiece(i, j) { |
| 35 | const piece = this.board[i][j].charAt(1); |
| 36 | // Special lancer case: 8 possible orientations |
| 37 | if (Object.keys(V.LANCER_DIRS).includes(piece)) return V.LANCER; |
| 38 | return piece; |
| 39 | } |
| 40 | |
| 41 | getPpath(b, color, score, orientation) { |
| 42 | if (Object.keys(V.LANCER_DIRS).includes(b[1])) { |
| 43 | if (orientation == 'w') return "Eightpieces/tmp_png/" + b; |
| 44 | // Find opposite direction for adequate display: |
| 45 | let oppDir = ''; |
| 46 | switch (b[1]) { |
| 47 | case 'c': |
| 48 | oppDir = 'g'; |
| 49 | break; |
| 50 | case 'g': |
| 51 | oppDir = 'c'; |
| 52 | break; |
| 53 | case 'd': |
| 54 | oppDir = 'h'; |
| 55 | break; |
| 56 | case 'h': |
| 57 | oppDir = 'd'; |
| 58 | break; |
| 59 | case 'e': |
| 60 | oppDir = 'm'; |
| 61 | break; |
| 62 | case 'm': |
| 63 | oppDir = 'e'; |
| 64 | break; |
| 65 | case 'f': |
| 66 | oppDir = 'o'; |
| 67 | break; |
| 68 | case 'o': |
| 69 | oppDir = 'f'; |
| 70 | break; |
| 71 | } |
| 72 | return "Eightpieces/tmp_png/" + b[0] + oppDir; |
| 73 | } |
| 74 | // TODO: after we have SVG pieces, remove the folder and next prefix: |
| 75 | return "Eightpieces/tmp_png/" + b; |
| 76 | } |
| 77 | |
| 78 | getPPpath(m, orientation) { |
| 79 | return ( |
| 80 | this.getPpath( |
| 81 | m.appear[0].c + m.appear[0].p, |
| 82 | null, |
| 83 | null, |
| 84 | orientation |
| 85 | ) |
| 86 | ); |
| 87 | } |
| 88 | |
| 89 | static GenRandInitFen(randomness) { |
| 90 | if (randomness == 0) |
| 91 | // Deterministic: |
| 92 | return "efbqkbnm/pppppppp/8/8/8/8/PPPPPPPP/EDBQKBNM w 0 ahah -"; |
| 93 | |
| 94 | const baseFen = ChessRules.GenRandInitFen(randomness); |
| 95 | // Replace black rooks by lancers oriented south, |
| 96 | // and white rooks by lancers oriented north: |
| 97 | return baseFen.replace(/r/g, 'g').replace(/R/g, 'C'); |
| 98 | } |
| 99 | |
| 100 | // Because of the lancers, getPiece() could be wrong: |
| 101 | // use board[x][y][1] instead (always valid). |
| 102 | // TODO: base implementation now uses this too (no?) |
| 103 | getBasicMove([sx, sy], [ex, ey], tr) { |
| 104 | const initColor = this.getColor(sx, sy); |
| 105 | const initPiece = this.board[sx][sy].charAt(1); |
| 106 | let mv = new Move({ |
| 107 | appear: [ |
| 108 | new PiPo({ |
| 109 | x: ex, |
| 110 | y: ey, |
| 111 | c: tr ? tr.c : initColor, |
| 112 | p: tr ? tr.p : initPiece |
| 113 | }) |
| 114 | ], |
| 115 | vanish: [ |
| 116 | new PiPo({ |
| 117 | x: sx, |
| 118 | y: sy, |
| 119 | c: initColor, |
| 120 | p: initPiece |
| 121 | }) |
| 122 | ] |
| 123 | }); |
| 124 | |
| 125 | // The opponent piece disappears if we take it |
| 126 | if (this.board[ex][ey] != V.EMPTY) { |
| 127 | mv.vanish.push( |
| 128 | new PiPo({ |
| 129 | x: ex, |
| 130 | y: ey, |
| 131 | c: this.getColor(ex, ey), |
| 132 | p: this.board[ex][ey].charAt(1) |
| 133 | }) |
| 134 | ); |
| 135 | } |
| 136 | |
| 137 | return mv; |
| 138 | } |
| 139 | |
| 140 | getPotentialMovesFrom([x, y]) { |
| 141 | if (this.getPiece(x, y) == V.LANCER) |
| 142 | return this.getPotentialLancerMoves([x, y]); |
| 143 | return super.getPotentialMovesFrom([x, y]); |
| 144 | } |
| 145 | |
| 146 | // Obtain all lancer moves in "step" direction |
| 147 | getPotentialLancerMoves_aux([x, y], step, tr) { |
| 148 | let moves = []; |
| 149 | // Add all moves to vacant squares until opponent is met: |
| 150 | const color = this.getColor(x, y); |
| 151 | const oppCol = V.GetOppCol(color) |
| 152 | let sq = [x + step[0], y + step[1]]; |
| 153 | while (V.OnBoard(sq[0], sq[1]) && this.getColor(sq[0], sq[1]) != oppCol) { |
| 154 | if (this.board[sq[0]][sq[1]] == V.EMPTY) |
| 155 | moves.push(this.getBasicMove([x, y], sq, tr)); |
| 156 | sq[0] += step[0]; |
| 157 | sq[1] += step[1]; |
| 158 | } |
| 159 | if (V.OnBoard(sq[0], sq[1])) |
| 160 | // Add capturing move |
| 161 | moves.push(this.getBasicMove([x, y], sq, tr)); |
| 162 | return moves; |
| 163 | } |
| 164 | |
| 165 | getPotentialLancerMoves([x, y]) { |
| 166 | let moves = []; |
| 167 | // Add all lancer possible orientations, similar to pawn promotions. |
| 168 | const color = this.getColor(x, y); |
| 169 | const dirCode = this.board[x][y][1]; |
| 170 | const curDir = V.LANCER_DIRS[dirCode]; |
| 171 | const monodirMoves = |
| 172 | this.getPotentialLancerMoves_aux([x, y], V.LANCER_DIRS[dirCode]); |
| 173 | monodirMoves.forEach(m => { |
| 174 | Object.keys(V.LANCER_DIRS).forEach(k => { |
| 175 | const newDir = V.LANCER_DIRS[k]; |
| 176 | // Prevent orientations toward outer board: |
| 177 | if (V.OnBoard(m.end.x + newDir[0], m.end.y + newDir[1])) { |
| 178 | let mk = JSON.parse(JSON.stringify(m)); |
| 179 | mk.appear[0].p = k; |
| 180 | moves.push(mk); |
| 181 | } |
| 182 | }); |
| 183 | }); |
| 184 | return moves; |
| 185 | } |
| 186 | |
| 187 | isAttacked(sq, color) { |
| 188 | return ( |
| 189 | super.isAttacked(sq, color) || |
| 190 | this.isAttackedByLancer(sq, color) |
| 191 | ); |
| 192 | } |
| 193 | |
| 194 | isAttackedByLancer([x, y], color) { |
| 195 | for (let step of V.steps[V.ROOK].concat(V.steps[V.BISHOP])) { |
| 196 | // If in this direction there are only enemy pieces and empty squares, |
| 197 | // and we meet a lancer: can he reach us? |
| 198 | // NOTE: do not stop at first lancer, there might be several! |
| 199 | let coord = { x: x + step[0], y: y + step[1] }; |
| 200 | let lancerPos = []; |
| 201 | while ( |
| 202 | V.OnBoard(coord.x, coord.y) && |
| 203 | ( |
| 204 | this.board[coord.x][coord.y] == V.EMPTY || |
| 205 | this.getColor(coord.x, coord.y) == color |
| 206 | ) |
| 207 | ) { |
| 208 | if ( |
| 209 | this.getPiece(coord.x, coord.y) == V.LANCER && |
| 210 | !this.isImmobilized([coord.x, coord.y]) |
| 211 | ) { |
| 212 | lancerPos.push({x: coord.x, y: coord.y}); |
| 213 | } |
| 214 | coord.x += step[0]; |
| 215 | coord.y += step[1]; |
| 216 | } |
| 217 | for (let xy of lancerPos) { |
| 218 | const dir = V.LANCER_DIRS[this.board[xy.x][xy.y].charAt(1)]; |
| 219 | if (dir[0] == -step[0] && dir[1] == -step[1]) return true; |
| 220 | } |
| 221 | } |
| 222 | return false; |
| 223 | } |
| 224 | |
| 225 | static get VALUES() { |
| 226 | return Object.assign( |
| 227 | { l: 4.8 }, //Jeff K. estimation (for Eightpieces) |
| 228 | ChessRules.VALUES |
| 229 | ); |
| 230 | } |
| 231 | |
| 232 | // For moves notation: |
| 233 | static get LANCER_DIRNAMES() { |
| 234 | return { |
| 235 | 'c': "N", |
| 236 | 'd': "NE", |
| 237 | 'e': "E", |
| 238 | 'f': "SE", |
| 239 | 'g': "S", |
| 240 | 'h': "SW", |
| 241 | 'm': "W", |
| 242 | 'o': "NW" |
| 243 | }; |
| 244 | } |
| 245 | |
| 246 | filterValid(moves) { |
| 247 | // At move 1, forbid captures (in case of...): |
| 248 | if (this.movesCount >= 2) return moves; |
| 249 | return moves.filter(m => m.vanish.length == 1); |
| 250 | } |
| 251 | |
| 252 | getNotation(move) { |
| 253 | let notation = super.getNotation(move); |
| 254 | if (Object.keys(V.LANCER_DIRNAMES).includes(move.vanish[0].p)) |
| 255 | // Lancer: add direction info |
| 256 | notation += "=" + V.LANCER_DIRNAMES[move.appear[0].p]; |
| 257 | else if ( |
| 258 | move.vanish[0].p == V.PAWN && |
| 259 | Object.keys(V.LANCER_DIRNAMES).includes(move.appear[0].p) |
| 260 | ) { |
| 261 | // Fix promotions in lancer: |
| 262 | notation = notation.slice(0, -1) + |
| 263 | "L:" + V.LANCER_DIRNAMES[move.appear[0].p]; |
| 264 | } |
| 265 | return notation; |
| 266 | } |
| 267 | |
| 268 | }; |