author | Oleksandr Gavenko <gavenkoa@gmail.com> |
Tue, 23 Sep 2014 01:09:28 +0300 | |
changeset 117 | 5701802ff232 |
parent 110 | e3a91b336976 |
child 118 | 7e93fb8136a3 |
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 function names. @constant */ |
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ai.canDirs = ["canUp", "canRight", "canDown", "canLeft"]; |
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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 = {}; |
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if (from == null || typeof from !== "object") |
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return to; |
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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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// 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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ai.BlindRandom.prototype.analyse = function(brd) { |
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var origBrd = new this.brdEngine(brd); |
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while (true) { |
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var rnd = Math.floor(Math.random()*4); |
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if (origBrd[ai.canDirs[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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// Blind weight random AI. |
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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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ai.BlindWeightRandom.prototype.analyse = function(brd) { |
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var origBrd = new this.brdEngine(brd); |
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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.canDirs[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. */ |
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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 */ |
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ai.BlindCycle = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
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this.cfg = cfg || {}; |
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this.cfg.whilePossible = this.cfg.whilePossible || false; |
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this.cfg.clockwise = this.cfg.clockwise || false; |
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} |
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ai.BlindCycle.dirs = ["left", "down", "right", "up"]; |
123 |
ai.BlindCycle.canDirs = ["canLeft", "canDown", "canRight", "canUp"]; |
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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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ai.BlindCycle.prototype.analyse = function(brd) { |
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var origBrd = new this.brdEngine(brd); |
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this.prevDir = this.prevDir || 0; |
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if (!this.cfg.whilePossible) |
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this.prevDir = this.nextDir(this.prevDir); |
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while (true) { |
59 | 136 |
if (origBrd[ai.BlindCycle.canDirs[this.prevDir]]()) |
137 |
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. */ |
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ai.BlindCycle.prototype.cleanup = function() { |
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delete this.prevDir; |
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} |
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145 |
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146 |
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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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153 |
|
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/** |
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* Defines coefficient for linear resulted weight function. |
99 | 156 |
* @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 | 167 |
* @param {ai.OneStepAhead.cfg} cfg configuration settings |
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* @constructor */ |
99 | 169 |
ai.OneStepAhead = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
99 | 171 |
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.OneStepAhead.bestCfg = {scoreCoef: 1, maxValCoef: 0, cornerBonus: 0, edgeBonus: 0, freeBonus: 0}; |
175 |
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.max(); |
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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.free(); |
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return weight; |
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189 |
} |
99 | 190 |
ai.OneStepAhead.prototype.analyse = function(brd) { |
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var origBrd = new this.brdEngine(brd); |
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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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206 |
} |
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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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209 |
|
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210 |
|
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212 |
//////////////////////////////////////////////////////////////// |
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// N level deep on score value without random simulation. |
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//////////////////////////////////////////////////////////////// |
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215 |
|
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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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|
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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.max(); |
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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.free(); |
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return weight; |
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} |
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ai.StaticDeepMerges.prototype.analyse = function(brd) { |
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var origBrd = new this.brdEngine(brd); |
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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.weightPriority; |
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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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271 |
} |
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272 |
} |
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273 |
} |
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274 |
return bestDir; |
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275 |
} |
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276 |
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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279 |
var nextBrd = new this.brdEngine(); |
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280 |
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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285 |
} |
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286 |
} |
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287 |
return maxWeight; |
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288 |
} |
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289 |
/* 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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291 |
|
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292 |
|
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293 |
|
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294 |
//////////////////////////////////////////////////////////////// |
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295 |
// N level deep with random simulation. |
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296 |
//////////////////////////////////////////////////////////////// |
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297 |
|
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298 |
/** |
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299 |
* Defines coefficient for linear resulted weight function. |
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300 |
* @name ai.expectimax.cfg |
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301 |
* @namespace |
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302 |
* @property {number} scoreCoef multiplicator for score |
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303 |
* @property {number} maxValCoef multiplicator for max value |
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304 |
* @property {number} cornerBonus bonus for max value at board corner |
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305 |
* @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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307 |
*/ |
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308 |
|
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309 |
/** N level deep with random simulation. |
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310 |
* @param {Board} brdEngine board engine from board.js |
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311 |
* @param {ai.expectimax.cfg} cfg configuration settings |
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312 |
* @constructor */ |
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313 |
ai.expectimax = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
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315 |
this.cfg = ai.copyObj(ai.expectimax.bestCfg); |
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316 |
ai.copyObj(cfg, this.cfg); |
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317 |
if (this.cfg.balance <= 0) |
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318 |
this.cfg.balance = ai.expectimax.bestCfg.balance; |
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319 |
if ( this.cfg.balance > 1) |
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|
320 |
this.cfg.balance = 1; |
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321 |
if (!this.cfg.depth || this.cfg.depth < 0 || 8 <= this.cfg.depth) |
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322 |
this.cfg.depth = ai.expectimax.bestCfg.depth; |
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323 |
} |
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324 |
ai.expectimax.bestCfg = {balance: .9, depth: 3, scoreCoef: 1, maxValCoef: 0, cornerBonus: 0, edgeBonus: 0, freeBonus: 0, weightPriority: 10}; |
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325 |
ai.expectimax.prototype.weight = function(brd) { |
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326 |
var score = 0; |
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327 |
if (this.cfg.scoreCoef > 0) |
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328 |
score += this.cfg.scoreCoef * brd.score(); |
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329 |
var max = brd.max(); |
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|
330 |
if (this.cfg.maxValCoef > 0) |
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331 |
score += this.cfg.maxValCoef * max; |
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|
332 |
if (this.cfg.cornerBonus > 0) |
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|
333 |
if (brd.atCorner(max)) |
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|
334 |
score += this.cfg.cornerBonus; |
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|
335 |
if (this.cfg.edgeBonus > 0) |
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|
336 |
if (brd.atEdge(max)) |
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|
337 |
score += this.cfg.edgeBonus; |
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338 |
if (this.cfg.freeBonus > 0) |
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339 |
score += this.cfg.freeBonus * brd.free(); |
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changeset
|
340 |
return score; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
341 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
342 |
ai.expectimax.prototype.analyse = function(brd) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
343 |
var origBrd = new this.brdEngine(brd); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
344 |
var nextBrd = new this.brdEngine(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
345 |
var prevScore = -1, nextScore = -1; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
346 |
var maxWeight = -1; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
347 |
var bestDir; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
348 |
this.cleanup(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
349 |
for (var i = 0; i < ai.dirs.length; i++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
350 |
var dir = ai.dirs[i]; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
351 |
if (origBrd[dir](nextBrd)) { |
109 | 352 |
var weight = this.evalFn(nextBrd, 1); |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
353 |
var ok = (weight - maxWeight) > this.cfg.weightPriority; |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
354 |
if ( ! ok && maxWeight <= weight) { |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
355 |
nextScore = this.weight(nextBrd); |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
356 |
ok = prevScore < nextScore; |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
357 |
} |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
358 |
if (ok) { |
21
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
359 |
prevScore = nextScore; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
360 |
maxWeight = weight; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
361 |
bestDir = dir; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
362 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
363 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
364 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
365 |
this.cleanup(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
366 |
return bestDir; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
367 |
} |
109 | 368 |
ai.expectimax.prototype.evalFn = function(brd, depth) { |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
369 |
if (depth >= this.cfg.depth) |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
370 |
return this.weight(brd); |
21
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
371 |
if (this.cache[depth]) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
372 |
var cache = this.cache[depth]; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
373 |
for (var i = cache.length-1; i >= 0; i--) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
374 |
if (brd.equals(cache[i].brd)) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
375 |
return cache[i].weight; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
376 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
377 |
} else { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
378 |
this.cache[depth] = []; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
379 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
380 |
var weight = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
381 |
var free = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
382 |
for (var i = 0; i < 3; i++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
383 |
for (var j = 0; j < 3; j++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
384 |
if (brd.get(i, j) === 0) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
385 |
var randBoard = brd.copy(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
386 |
randBoard.set(i, j, 1); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
387 |
var nextBrd = new this.brdEngine(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
388 |
var n = 0, w = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
389 |
for (var diri = 0; diri < ai.dirs.length; diri++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
390 |
if (randBoard[ai.dirs[diri]](nextBrd)) { |
109 | 391 |
w += this.evalFn(nextBrd, depth+1); |
21
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
392 |
n++; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
393 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
394 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
395 |
if (n > 0) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
396 |
w = w / n; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
397 |
weight += this.cfg.balance * w; |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
398 |
if (this.cfg.balance < 1) { |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
399 |
randBoard.set(i, j, 2); |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
400 |
var n = 0, w = 0; |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
401 |
for (var diri = 0; diri < ai.dirs.length; diri++) { |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
402 |
if (randBoard[ai.dirs[diri]](nextBrd)) { |
109 | 403 |
w += this.evalFn(nextBrd, depth+1); |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
404 |
n++; |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
405 |
} |
21
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
406 |
} |
74
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
407 |
if (n > 0) |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
408 |
w = w / n; |
93cb48b73b39
Enable config for expectimax. Fix weight function for expectimax.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
60
diff
changeset
|
409 |
weight += this.cfg.balance * w; |
21
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
410 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
411 |
free++; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
412 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
413 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
414 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
415 |
if (free > 0) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
416 |
weight = weight / free; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
417 |
this.cache[depth].push({brd: brd, weight: weight}); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
418 |
return weight; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
419 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
420 |
/* 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
|
421 |
ai.expectimax.prototype.cleanup = function() { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
422 |
this.cache = []; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
423 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
424 |