author | Oleksandr Gavenko <gavenkoa@gmail.com> |
Sun, 19 Oct 2014 01:01:49 +0300 | |
changeset 153 | 5a2d38d67319 |
parent 152 | 07814b979a8a |
child 155 | 1f8df90bd338 |
permissions | -rw-r--r-- |
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"use strict"; |
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/** @fileOverview AI modules. */ |
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/** @module */ |
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var ai = {}; |
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/** Directions. @constant */ |
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ai.dirs = ["up", "right", "down", "left"]; |
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/** Possible direction check function names ordered by ai.dirs. @constant */ |
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ai.canFn = ["canUp", "canRight", "canDown", "canLeft"]; |
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/** Possible merge function names ordered by ai.dirs. @constant */ |
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ai.mergeFn = ["upMerges", "rightMerges", "downMerges", "leftMerges"]; |
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/** Create empty 'to' if argument missing. */ |
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ai.copyObj = function(from, to) { |
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if (to == null || typeof to !== "object") |
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to = {}; |
54 | 18 |
if (from == null || typeof from !== "object") |
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return to; |
54 | 20 |
for (var attr in from) { |
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if (from.hasOwnProperty(attr)) |
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to[attr] = from[attr]; |
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} |
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return to; |
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} |
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ai.brdCache = function() { |
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this.cache = []; |
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} |
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ai.brdCache.prototype.get = function(brd) { |
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var compr = brd.compress(); |
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var subCache = this.cache[compr[0]]; |
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if (subCache) { |
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return subCache[compr[1]]; |
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} |
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return undefined; |
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} |
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ai.brdCache.prototype.put = function(brd, val) { |
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var compr = brd.compress(); |
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var subCache = this.cache[compr[0]]; |
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if (subCache) { |
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subCache[compr[1]] = val; |
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} else { |
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this.cache[compr[0]] = []; |
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this.cache[compr[0]][compr[1]] = val; |
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} |
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} |
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// Each strategy is a function that except current board position as 2d array and context from |
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// previous call to share state/precomputed values between calls. |
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//////////////////////////////////////////////////////////////// |
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// Blind random AI. |
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//////////////////////////////////////////////////////////////// |
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/** Blind random AI. |
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* @param {Board} brdEngine board engine from board.js |
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* @constructor */ |
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ai.BlindRandom = function(brdEngine) { |
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this.brdEngine = brdEngine; |
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} |
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/** Select best direction for next step. */ |
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ai.BlindRandom.prototype.analyse = function(brd2d) { |
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var origBrd = new this.brdEngine(brd2d); |
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while (true) { |
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var rnd = Math.floor(Math.random()*4); |
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if (origBrd[ai.canFn[rnd]]()) |
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return ai.dirs[rnd]; |
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} |
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} |
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/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
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ai.BlindRandom.prototype.cleanup = function() { } |
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|
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//////////////////////////////////////////////////////////////// |
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// Blind weight random AI. |
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//////////////////////////////////////////////////////////////// |
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|
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/** |
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* @name ai.BlindWeightRandom.cfg |
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* @namespace |
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* @property {number} left weight |
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* @property {number} right weight |
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* @property {number} up weight |
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* @property {number} down weight |
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*/ |
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/** Blind weight random AI. |
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* @param {Board} brdEngine board engine from board.js |
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* @param {ai.BlindWeightRandom.cfg} cfg configuration settings |
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* @constructor */ |
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ai.BlindWeightRandom = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
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this.cfg = ai.copyObj(ai.BlindWeightRandom.bestCfg); |
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ai.copyObj(cfg, this.cfg); |
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var total = this.cfg.left + this.cfg.right + this.cfg.up + this.cfg.down; |
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this.threshold1 = this.cfg.left/total; |
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this.threshold2 = (this.cfg.left + this.cfg.down)/total; |
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this.threshold3 = (this.cfg.left + this.cfg.down + this.cfg.right)/total; |
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} |
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ai.BlindWeightRandom.bestCfg = { left: 1, right: 16, up: 4, down: 8 }; |
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/** Select best direction for next step. */ |
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ai.BlindWeightRandom.prototype.analyse = function(brd2d) { |
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var origBrd = new this.brdEngine(brd2d); |
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while (true) { |
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var rnd = Math.random(); |
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if (rnd < this.threshold1) |
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var dir = 0; |
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else if (rnd < this.threshold2) |
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var dir = 1; |
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else if (rnd < this.threshold3) |
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var dir = 2; |
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else |
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var dir = 3; |
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if (origBrd[ai.canFn[dir]]()) |
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return ai.dirs[dir]; |
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} |
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} |
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/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
59 | 123 |
ai.BlindWeightRandom.prototype.cleanup = function() { } |
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//////////////////////////////////////////////////////////////// |
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// Blind cycle AI. |
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//////////////////////////////////////////////////////////////// |
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/** |
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* @name ai.BlindCycle.cfg |
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* @namespace |
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* @property {boolean} whilePossible move in one direction while possible |
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* @property {boolean} down switch direction clockwise |
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*/ |
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/** Blind cycle AI. |
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* @param {Board} brdEngine board engine from board.js |
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* @param {ai.BlindCycle.cfg} cfg configuration settings |
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* @constructor */ |
59 | 142 |
ai.BlindCycle = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
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this.cfg = cfg || {}; |
29 | 145 |
this.cfg.whilePossible = this.cfg.whilePossible || false; |
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this.cfg.clockwise = this.cfg.clockwise || false; |
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} |
59 | 148 |
ai.BlindCycle.dirs = ["left", "down", "right", "up"]; |
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ai.BlindCycle.canFn = ["canLeft", "canDown", "canRight", "canUp"]; |
59 | 150 |
ai.BlindCycle.prototype.nextDir = function(dir) { |
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if (this.cfg.clockwise) |
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return (dir + (4-1)) % 4; |
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else |
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return (dir + 1) % 4; |
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} |
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/** Select best direction for next step. */ |
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ai.BlindCycle.prototype.analyse = function(brd2d) { |
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var origBrd = new this.brdEngine(brd2d); |
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this.prevDir = this.prevDir || 0; |
29 | 160 |
if (!this.cfg.whilePossible) |
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this.prevDir = this.nextDir(this.prevDir); |
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while (true) { |
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if (origBrd[ai.BlindCycle.canFn[this.prevDir]]()) |
59 | 164 |
return ai.BlindCycle.dirs[this.prevDir]; |
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this.prevDir = this.nextDir(this.prevDir); |
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} |
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} |
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/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
59 | 169 |
ai.BlindCycle.prototype.cleanup = function() { |
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delete this.prevDir; |
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} |
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//////////////////////////////////////////////////////////////// |
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// 1 step deep with linear weight function on score, max value, |
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// bonuses for max value stay at corner or edge and bonuses |
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// for each free field. |
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//////////////////////////////////////////////////////////////// |
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|
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/** |
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* Defines coefficient for linear resulted weight function. |
99 | 183 |
* @name ai.OneStepAhead.cfg |
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* @namespace |
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* @property {number} scoreCoef multiplicator for score |
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* @property {number} maxValCoef multiplicator for max value |
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* @property {number} cornerBonus bonus for max value at board corner |
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* @property {number} edgeBonus bonus for max value at board edge |
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* @property {number} freeBonus bonus for each free cell |
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*/ |
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/** 1 step deep with * AI. |
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* @param {Board} brdEngine board engine from board.js |
99 | 194 |
* @param {ai.OneStepAhead.cfg} cfg configuration settings |
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* @constructor */ |
99 | 196 |
ai.OneStepAhead = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
99 | 198 |
this.cfg = ai.copyObj(ai.OneStepAhead.bestCfg); |
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ai.copyObj(cfg, this.cfg); |
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} |
99 | 201 |
ai.OneStepAhead.bestCfg = {scoreCoef: 1, maxValCoef: 0, cornerBonus: 0, edgeBonus: 0, freeBonus: 0}; |
202 |
ai.OneStepAhead.prototype.weight = function(brd) { |
|
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var weight = 0; |
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if (this.cfg.scoreCoef > 0) |
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weight += this.cfg.scoreCoef * brd.score(); |
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var max = brd.maxVal(); |
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if (this.cfg.maxValCoef > 0) |
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weight += this.cfg.maxValCoef * max; |
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if (this.cfg.cornerBonus > 0 && brd.atCorner(max)) |
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weight += this.cfg.cornerBonus; |
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if (this.cfg.edgeBonus > 0 && brd.atEdge(max)) |
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weight += this.cfg.edgeBonus; |
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if (this.cfg.freeBonus > 0) |
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weight += this.cfg.freeBonus * brd.freeCnt(); |
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return weight; |
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} |
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/** Select best direction for next step. */ |
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ai.OneStepAhead.prototype.analyse = function(brd2d) { |
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var origBrd = new this.brdEngine(brd2d); |
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var nextBrd = new this.brdEngine(); |
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var maxWeight = -1; |
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var bestDir; |
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for (var i = 0; i < ai.dirs.length; i++) { |
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var dir = ai.dirs[i]; |
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if (origBrd[dir](nextBrd)) { |
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var weight = this.weight(nextBrd); |
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if (maxWeight < weight) { |
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bestDir = dir; |
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maxWeight = weight; |
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} |
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} |
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} |
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return bestDir; |
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} |
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/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
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ai.OneStepAhead.prototype.cleanup = function() { } |
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//////////////////////////////////////////////////////////////// |
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// N level deep on score value without random simulation. |
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//////////////////////////////////////////////////////////////// |
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/** |
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* Defines coefficient for linear resulted weight function. |
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* @name ai.StaticDeepMerges.cfg |
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* @namespace |
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* @property {number} scoreCoef multiplicator for score |
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* @property {number} maxValCoef multiplicator for max value |
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* @property {number} cornerBonus bonus for max value at board corner |
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* @property {number} edgeBonus bonus for max value at board edge |
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* @property {number} freeBonus bonus for each free cell |
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*/ |
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/** Deep merges AI without random simulation. |
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* @param {Board} brdEngine board engine from board.js |
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* @param {Object} cfg configuration settings |
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* @constructor */ |
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ai.StaticDeepMerges = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
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this.cfg = ai.copyObj(ai.OneStepAhead.bestCfg); |
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ai.copyObj(cfg, this.cfg); |
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} |
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ai.StaticDeepMerges.bestCfg = {scoreCoef: 1, maxValCoef: 0, cornerBonus: 0, edgeBonus: 0, freeBonus: 0, weightThreshold: 10}; |
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ai.StaticDeepMerges.prototype.weight = function(brd) { |
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var weight = 0; |
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if (this.cfg.scoreCoef > 0) |
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weight += this.cfg.scoreCoef * brd.score(); |
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var max = brd.maxVal(); |
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if (this.cfg.maxValCoef > 0) |
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weight += this.cfg.maxValCoef * max; |
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if (this.cfg.cornerBonus > 0 && brd.atCorner(max)) |
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weight += this.cfg.cornerBonus; |
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if (this.cfg.edgeBonus > 0 && brd.atEdge(max)) |
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weight += this.cfg.edgeBonus; |
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if (this.cfg.freeBonus > 0) |
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weight += this.cfg.freeBonus * brd.freeCnt(); |
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return weight; |
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} |
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/** Select best direction for next step. */ |
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ai.StaticDeepMerges.prototype.analyse = function(brd2d) { |
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var origBrd = new this.brdEngine(brd2d); |
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var nextBrd = new this.brdEngine(); |
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var prevScore = -1, nextScore = -1; |
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var maxWeight = -1; |
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var bestDir; |
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for (var i = 0; i < ai.dirs.length; i++) { |
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var dir = ai.dirs[i]; |
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if (origBrd[dir](nextBrd)) { |
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var weight = this.evalFn(nextBrd); |
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var ok = (weight - maxWeight) > this.cfg.weightThreshold; |
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if ( ! ok && maxWeight <= weight) { |
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nextScore = this.weight(nextBrd); |
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ok = prevScore < nextScore; |
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} |
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if (ok) { |
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prevScore = nextScore; |
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maxWeight = weight; |
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bestDir = dir; |
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} |
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} |
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} |
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return bestDir; |
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} |
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ai.StaticDeepMerges.prototype.evalFn = function(brd) { |
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var currScore = brd.score(); |
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var maxWeight = currScore; |
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var nextBrd = new this.brdEngine(); |
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for (var i = 0; i < ai.dirs.length; i++) { |
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if (brd[ai.dirs[i]](nextBrd)) { |
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var score = nextBrd.score(); |
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if (score > currScore) |
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maxWeight = Math.max(maxWeight, this.evalFn(nextBrd)); |
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} |
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} |
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return maxWeight; |
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} |
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/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
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ai.StaticDeepMerges.prototype.cleanup = function() { } |
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|
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|
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//////////////////////////////////////////////////////////////// |
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// N level deep with random simulation. |
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//////////////////////////////////////////////////////////////// |
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326 |
|
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327 |
/** |
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328 |
* Defines coefficient for linear resulted weight function. |
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* @name ai.expectimax.cfg |
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* @namespace |
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* @property {number} scoreCoef multiplicator for score |
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332 |
* @property {number} maxValCoef multiplicator for max value |
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* @property {number} cornerBonus bonus for max value at board corner |
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334 |
* @property {number} edgeBonus bonus for max value at board edge |
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* @property {number} freeBonus bonus for each free cell |
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336 |
*/ |
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337 |
|
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338 |
/** N level deep with random simulation. |
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|
339 |
* @param {Board} brdEngine board engine from board.js |
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|
340 |
* @param {ai.expectimax.cfg} cfg configuration settings |
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|
341 |
* @constructor */ |
21
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|
342 |
ai.expectimax = function(brdEngine, cfg) { |
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|
343 |
this.brdEngine = brdEngine; |
74
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|
344 |
this.cfg = ai.copyObj(ai.expectimax.bestCfg); |
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|
345 |
ai.copyObj(cfg, this.cfg); |
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changeset
|
346 |
if (this.cfg.balance <= 0) |
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changeset
|
347 |
this.cfg.balance = ai.expectimax.bestCfg.balance; |
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changeset
|
348 |
if ( this.cfg.balance > 1) |
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changeset
|
349 |
this.cfg.balance = 1; |
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changeset
|
350 |
if (!this.cfg.depth || this.cfg.depth < 0 || 9 <= this.cfg.depth) |
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changeset
|
351 |
this.cfg.depth = ai.expectimax.bestCfg.depth; |
21
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|
352 |
} |
126
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changeset
|
353 |
ai.expectimax.bestCfg = {balance: .9, depth: 5, scoreCoef: 1, maxValCoef: 0, cornerBonus: 0, edgeBonus: 0, freeBonus: 0}; |
74
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changeset
|
354 |
ai.expectimax.prototype.weight = function(brd) { |
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changeset
|
355 |
var score = 0; |
122
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changeset
|
356 |
var cfg = this.cfg; |
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|
357 |
if (cfg.scoreCoef > 0) |
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|
358 |
score += cfg.scoreCoef * brd.score(); |
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changeset
|
359 |
if (cfg.maxValCoef > 0 || cfg.cornerBonus > 0 || cfg.edgeBonus > 0) { |
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changeset
|
360 |
var max = brd.maxVal(); |
122
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|
361 |
if (cfg.maxValCoef > 0) |
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|
362 |
score += cfg.maxValCoef * max; |
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|
363 |
if (cfg.cornerBonus > 0) |
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|
364 |
if (brd.atCorner(max)) |
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|
365 |
score += cfg.cornerBonus; |
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|
366 |
if (cfg.edgeBonus > 0) |
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changeset
|
367 |
if (brd.atEdge(max)) |
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|
368 |
score += cfg.edgeBonus; |
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changeset
|
369 |
} |
135
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Fix: code in wrong scope.
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|
370 |
if (cfg.freeBonus > 0) |
148
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|
371 |
score += cfg.freeBonus * brd.freeCnt(); |
21
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|
372 |
return score; |
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|
373 |
} |
147
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changeset
|
374 |
/** Select best direction for next step. */ |
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changeset
|
375 |
ai.expectimax.prototype.analyse = function(brd2d) { |
139
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|
376 |
this.brdCache = new ai.brdCache(); |
147
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changeset
|
377 |
var origBrd = new this.brdEngine(brd2d); |
21
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changeset
|
378 |
var nextBrd = new this.brdEngine(); |
125
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changeset
|
379 |
var maxW = -1; |
21
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Expectimax implementation.
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changeset
|
380 |
var bestDir; |
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Expectimax implementation.
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changeset
|
381 |
this.cleanup(); |
126
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changeset
|
382 |
this.depthLimit = this.cfg.depth; |
148
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changeset
|
383 |
var freeCnt = origBrd.freeCnt(); |
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Refactoring: take proper name for function.
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changeset
|
384 |
if (freeCnt >= 6) |
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changeset
|
385 |
this.depthLimit = Math.min(this.depthLimit, 6 - freeCnt/3); |
21
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Expectimax implementation.
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|
386 |
for (var i = 0; i < ai.dirs.length; i++) { |
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Expectimax implementation.
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parents:
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changeset
|
387 |
var dir = ai.dirs[i]; |
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Expectimax implementation.
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parents:
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changeset
|
388 |
if (origBrd[dir](nextBrd)) { |
125
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changeset
|
389 |
var w = this.evalFn(nextBrd, 1); |
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parents:
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changeset
|
390 |
if (w > maxW) { |
fa1f44d3888d
Remove comparing with next board weight if expected value differ less then threshold.
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parents:
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changeset
|
391 |
maxW = w; |
21
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changeset
|
392 |
bestDir = dir; |
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Expectimax implementation.
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changeset
|
393 |
} |
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Expectimax implementation.
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changeset
|
394 |
} |
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Expectimax implementation.
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changeset
|
395 |
} |
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Expectimax implementation.
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changeset
|
396 |
this.cleanup(); |
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Expectimax implementation.
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diff
changeset
|
397 |
return bestDir; |
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Expectimax implementation.
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changeset
|
398 |
} |
109 | 399 |
ai.expectimax.prototype.evalFn = function(brd, depth) { |
126
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Increase depth limit.
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changeset
|
400 |
if (depth >= this.depthLimit) |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
401 |
return this.weight(brd); |
139
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Make fast board cache.
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diff
changeset
|
402 |
var wCached = this.brdCache.get(brd); |
4dde63ac0bb4
Make fast board cache.
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changeset
|
403 |
if (wCached) |
4dde63ac0bb4
Make fast board cache.
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diff
changeset
|
404 |
return wCached; |
124
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Fix: expectimax select best move which lead to less danger among all worst.
Oleksandr Gavenko <gavenkoa@gmail.com>
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changeset
|
405 |
var wMin = +Infinity; |
140
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Create object outside of loop.
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changeset
|
406 |
var randBoard = new this.brdEngine(); |
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Create object outside of loop.
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changeset
|
407 |
var nextBrd = new this.brdEngine(); |
21
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Expectimax implementation.
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changeset
|
408 |
for (var i = 0; i < 3; i++) { |
ed0292f0c7c6
Expectimax implementation.
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parents:
20
diff
changeset
|
409 |
for (var j = 0; j < 3; j++) { |
ed0292f0c7c6
Expectimax implementation.
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parents:
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diff
changeset
|
410 |
if (brd.get(i, j) === 0) { |
140
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Create object outside of loop.
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changeset
|
411 |
brd.copy(randBoard); |
21
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Expectimax implementation.
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20
diff
changeset
|
412 |
randBoard.set(i, j, 1); |
124
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Fix: expectimax select best move which lead to less danger among all worst.
Oleksandr Gavenko <gavenkoa@gmail.com>
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changeset
|
413 |
var wMax2 = 0; |
21
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changeset
|
414 |
for (var diri = 0; diri < ai.dirs.length; diri++) { |
124
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Fix: expectimax select best move which lead to less danger among all worst.
Oleksandr Gavenko <gavenkoa@gmail.com>
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changeset
|
415 |
if (randBoard[ai.dirs[diri]](nextBrd)) |
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Fix: expectimax select best move which lead to less danger among all worst.
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changeset
|
416 |
wMax2 = Math.max(wMax2, this.evalFn(nextBrd, depth+1)); |
21
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changeset
|
417 |
} |
124
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Fix: expectimax select best move which lead to less danger among all worst.
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changeset
|
418 |
var wMax4 = 0; |
136
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Fix: wrong variable scope.
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changeset
|
419 |
var balance = this.cfg.balance; |
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Fix: wrong variable scope.
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changeset
|
420 |
if (balance < 1) { |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
421 |
randBoard.set(i, j, 2); |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
422 |
for (var diri = 0; diri < ai.dirs.length; diri++) { |
124
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Fix: expectimax select best move which lead to less danger among all worst.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
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diff
changeset
|
423 |
if (randBoard[ai.dirs[diri]](nextBrd)) |
4a2551dd179d
Fix: expectimax select best move which lead to less danger among all worst.
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changeset
|
424 |
wMax4 = Math.max(wMax4, this.evalFn(nextBrd, depth+1)); |
21
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Expectimax implementation.
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parents:
20
diff
changeset
|
425 |
} |
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Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
426 |
} |
124
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Fix: expectimax select best move which lead to less danger among all worst.
Oleksandr Gavenko <gavenkoa@gmail.com>
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changeset
|
427 |
wMin = Math.min(wMin, balance * wMax2 + (1 - balance) * wMax4); |
21
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Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
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20
diff
changeset
|
428 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
429 |
} |
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Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
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20
diff
changeset
|
430 |
} |
139
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Make fast board cache.
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parents:
136
diff
changeset
|
431 |
this.brdCache.put(brd, wMin); |
124
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Fix: expectimax select best move which lead to less danger among all worst.
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changeset
|
432 |
return wMin; |
21
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Expectimax implementation.
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20
diff
changeset
|
433 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
434 |
/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
435 |
ai.expectimax.prototype.cleanup = function() { |
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Expectimax implementation.
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parents:
20
diff
changeset
|
436 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
437 |