小程序版2048微信小程序源码（含截图）.rar

var Grid = require('./grid.js'); var Tile = require('./tile.js'); function GameManager(size) { this.size = size; this.startTiles = 2; } GameManager.prototype = { setup: function() { this.grid = new Grid(this.size); this.score = 0; this.over = false; this.won = false; this.addStartTiles(); return this.grid.cells; }, // 初始化数据 addStartTiles: function() { for (var x = 0; x < this.startTiles; x++) { this.addRandomTiles(); } }, // 在一个随机单元格中随机填充2或4 addRandomTiles: function() { if (this.grid.cellsAvailable()) { var value = Math.random() < 0.9 ? 2 : 4; var cell = this.grid.randomAvailableCell(); var tile = new Tile(cell, value); this.grid.insertTile(tile); // 插入一个单元格 } }, actuate: function() { return { grids: this.grid.cells, over: this.over, won: this.won, score: this.score } }, // 偏移向量 getVector: function(direction) { var map = { 0: { // 上 x: -1, y: 0 }, 1: { // 右 x: 0, y: 1 }, 2: { // 下 x: 1, y: 0 }, 3: { // 左 x: 0, y: -1 } }; return map[direction]; }, buildTraversals: function(vector) { var traversals = { x: [], y: [] }; for (var pos = 0; pos < this.size; pos++) { traversals.x.push(pos); traversals.y.push(pos); } // 为什么要加这个，看findFarthestTail if (vector.x === 1) { // 向右时 traversals.x = traversals.x.reverse(); } if (vector.y === 1) { // 向下 traversals.y = traversals.y.reverse(); } return traversals; }, // 把当前单元格挪至下一个可放置的区域 moveTile: function(tile, cell) { this.grid.cells[tile.x][tile.y] = null; this.grid.cells[cell.x][cell.y] = tile; tile.updatePosition(cell); }, // 特定方向移动单元格 move: function(direction) { // 0: up, 1: right, 2: down, 3: left var self = this; var vector = this.getVector(direction); var traversals = this.buildTraversals(vector); var cell; var tile; var moved = false; self.prepareTiles(); traversals.x.forEach(function(x) { traversals.y.forEach(function(y) { // console.log('x:', x, 'y:', y); cell = { x: x, y: y }; tile = self.grid.cellContent(cell); if (tile) { // 单元格有内容 var positions = self.findFarthestTail(cell, vector); var next = self.grid.cellContent(positions.next); if (next && next.value === tile.value && !next.mergedFrom) { // 当前格子和其移动方向格子内容相同，需要合并 var merged = new Tile(positions.next, tile.value * 2); // 合并后的格子信息 merged.mergedFrom = [tile, next]; self.grid.insertTile(merged); // 把合并的盒子插入到当前格子数据中 self.grid.removeTile(tile); // 删除当前格子内容 tile.updatePosition(positions.next); self.score += merged.value; if (merged.value === 2048) self.won = true; } else { self.moveTile(tile, positions.farthest); } // 是否从当前位置移到当前位置 if (!self.positionsEqual(cell, tile)) { moved = true; } } }); }); if (moved) { this.addRandomTiles(); if (!this.movesAvailable()) { this.over = true; } return this.actuate(); } // return this.grid.cells }, prepareTiles: function() { var tile; for (var x = 0; x < this.size; x++) { for (var y = 0; y < this.size; y++) { tile = this.grid.cells[x][y]; if (tile) { tile.mergedFrom = null; tile.savePosition(); } } } }, positionsEqual: function(first, second) { return first.x === second.x && first.y === second.y; }, movesAvailable: function() { return this.grid.cellsAvailable() || this.tileMatchesAvailable(); }, tileMatchesAvailable: function() { var self = this; var tile; for (var x = 0; x < this.size; x++) { for (var y = 0; y < this.size; y++) { tile = this.grid.cellContent({ x: x, y: y }); if (tile) { for (var direction = 0; direction < 4; direction++) { var vector = self.getVector(direction); var cell = { x: x + vector.x, y: y + vector.y }; var other = self.grid.cellContent(cell); if (other && other.value === tile.value) { return true; } } } } } return false; }, // 找到当前偏移方向存在最远的空单元格 // 如：向右偏移，那么返回当前行最靠右的空单元格及其右侧距离其最远的一个格子，向下一样 findFarthestTail: function(cell, vector) { var previous; // 当前单元格在范围内且存在可用单元格 do { previous = cell; cell = { x: previous.x + vector.x, y: previous.y + vector.y }; } while (this.grid.withinBounds(cell) && this.grid.emptyCell(cell)); return { farthest: previous, next: cell } }, // 重新开始 restart: function() { return this.setup(); } } module.exports = GameManager;