author | Oleksandr Gavenko <gavenkoa@gmail.com> |
Wed, 10 Sep 2014 14:49:28 +0300 | |
changeset 36 | a18fc2601ce8 |
parent 35 | 3d56325d7002 |
child 53 | ee53cd2cb69a |
permissions | -rw-r--r-- |
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parents:
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"use strict"; |
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var ai = {}; |
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ai.dirs = ["up", "right", "down", "left"]; |
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ai.canDirs = ["canUp", "canRight", "canDown", "canLeft"]; |
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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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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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ai.blindWeightRandom = function(brdEngine, cfg) { |
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this.brdEngine = brdEngine; |
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this.cfg = this.cfg || {}; |
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var left = ai.blindWeightRandom.fixWeight(this.cfg.left); |
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var right = ai.blindWeightRandom.fixWeight(this.cfg.right); |
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var up = ai.blindWeightRandom.fixWeight(this.cfg.up); |
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var down = ai.blindWeightRandom.fixWeight(this.cfg.down); |
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var total = left + right + up + down; |
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this.threshold1 = left/total; |
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this.threshold2 = (left+down)/total; |
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this.threshold3 = (left+down+right)/total; |
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} |
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ai.blindWeightRandom.fixWeight = function(val) { |
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val = val && parseFloat(v) || 1; |
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if (val <= 0) |
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val = 1; |
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return val; |
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} |
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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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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"]; |
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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) { |
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if (origBrd[ai.blindCycle.canDirs[this.prevDir]]()) |
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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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//////////////////////////////////////////////////////////////// |
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// 1 level deep on max scores. |
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//////////////////////////////////////////////////////////////// |
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ai.nextMaxScore = function(brdEngine) { |
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|
116 |
this.brdEngine = brdEngine; |
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117 |
} |
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118 |
ai.nextMaxScore.prototype.analyse = function(brd) { |
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|
119 |
var origBrd = new this.brdEngine(brd); |
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120 |
var nextBrd = new this.brdEngine(); |
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121 |
var maxScore = -1; |
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|
122 |
var bestDir; |
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|
123 |
for (var i = 0; i < ai.dirs.length; i++) { |
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124 |
var dir = ai.dirs[i]; |
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|
125 |
if (origBrd[dir](nextBrd)) { |
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|
126 |
var score = nextBrd.score(); |
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|
127 |
if (maxScore < score) { |
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|
128 |
bestDir = dir; |
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|
129 |
maxScore = score; |
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|
130 |
} |
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|
131 |
} |
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132 |
} |
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|
133 |
return bestDir; |
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|
134 |
} |
12
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|
135 |
/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
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|
136 |
ai.nextMaxScore.prototype.cleanup = function() { } |
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|
137 |
|
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|
138 |
|
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|
139 |
|
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|
140 |
//////////////////////////////////////////////////////////////// |
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|
141 |
// 1 level deep on max value. |
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|
142 |
//////////////////////////////////////////////////////////////// |
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|
143 |
|
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|
144 |
ai.nextMaxValue = function(brdEngine) { |
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|
145 |
this.brdEngine = brdEngine; |
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|
146 |
} |
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|
147 |
ai.nextMaxValue.prototype.analyse = function(brd) { |
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|
148 |
var origBrd = new this.brdEngine(brd); |
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|
149 |
var nextBrd = new this.brdEngine(); |
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|
150 |
var maxMax = -1; |
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|
151 |
var bestDir; |
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|
152 |
for (var i = 0; i < ai.dirs.length; i++) { |
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|
153 |
var dir = ai.dirs[i]; |
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|
154 |
if (origBrd[dir](nextBrd)) { |
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|
155 |
var max = nextBrd.score(); |
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|
156 |
if (maxMax < max) { |
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|
157 |
maxMax = max; |
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|
158 |
bestDir = dir; |
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|
159 |
} |
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|
160 |
} |
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|
161 |
} |
19
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|
162 |
return bestDir; |
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changeset
|
163 |
} |
12
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changeset
|
164 |
/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
24
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|
165 |
ai.nextMaxValue.prototype.cleanup = function() { } |
10
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changeset
|
166 |
|
24
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changeset
|
167 |
|
14
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changeset
|
168 |
|
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|
169 |
//////////////////////////////////////////////////////////////// |
18
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|
170 |
// N level deep on score value without random simulation. |
14
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|
171 |
//////////////////////////////////////////////////////////////// |
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changeset
|
172 |
|
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|
173 |
ai.deepMaxScore = function(brdEngine) { |
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|
174 |
this.brdEngine = brdEngine; |
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|
175 |
} |
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|
176 |
ai.deepMaxScore.prototype.analyse = function(brd) { |
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|
177 |
var origBrd = new this.brdEngine(brd); |
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|
178 |
var nextBrd = new this.brdEngine(); |
18
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|
179 |
var prevScore = -1, nextScore = -1; |
14
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changeset
|
180 |
var maxScore = -1; |
18
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|
181 |
var bestDir; |
19
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|
182 |
for (var i = 0; i < ai.dirs.length; i++) { |
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|
183 |
var dir = ai.dirs[i]; |
18
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|
184 |
if (origBrd[dir](nextBrd)) { |
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Choose move that lead to maximum next score among all possible when next moves
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|
185 |
nextScore = nextBrd.score(); |
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|
186 |
var score = this.bestScore(nextBrd); |
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|
187 |
// console.log("dir: %o, prevScore: %o, nextScore: %o, maxScore: %o, score: %o", dir, prevScore, nextScore, maxScore, score); |
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changeset
|
188 |
if (maxScore < score || (maxScore === score && prevScore < nextScore)) { |
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|
189 |
prevScore = nextScore; |
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changeset
|
190 |
maxScore = score; |
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Choose move that lead to maximum next score among all possible when next moves
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|
191 |
bestDir = dir; |
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changeset
|
192 |
} |
14
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changeset
|
193 |
} |
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changeset
|
194 |
} |
18
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|
195 |
return bestDir; |
14
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changeset
|
196 |
} |
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|
197 |
ai.deepMaxScore.prototype.bestScore = function(brd, seenBrds) { |
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|
198 |
if (seenBrds) { |
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|
199 |
for (var i = 0; i < seenBrds.length; i++) |
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|
200 |
if (brd.equals(seenBrds[i])) |
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changeset
|
201 |
return 0; |
9b49e710f5a7
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changeset
|
202 |
} else { |
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|
203 |
seenBrds = []; |
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changeset
|
204 |
} |
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changeset
|
205 |
seenBrds.push(brd); |
18
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changeset
|
206 |
var currScore = brd.score(); |
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changeset
|
207 |
var maxScore = currScore; |
14
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|
208 |
var nextBrd = new this.brdEngine(); |
19
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|
209 |
for (var i = 0; i < ai.dirs.length; i++) { |
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|
210 |
if (brd[ai.dirs[i]](nextBrd)) { |
18
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changeset
|
211 |
var score = nextBrd.score(); |
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changeset
|
212 |
if (score > currScore) |
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|
213 |
maxScore = Math.max(maxScore, this.bestScore(nextBrd, seenBrds)); |
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|
214 |
} |
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Choose move that lead to maximum next score among all possible when next moves
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|
215 |
} |
14
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|
216 |
return maxScore; |
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|
217 |
} |
19
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|
218 |
/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
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changeset
|
219 |
ai.deepMaxScore.prototype.cleanup = function() { } |
14
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changeset
|
220 |
|
24
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changeset
|
221 |
|
20
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Add detecting value at edge or corner, free cell count. Added AI that count
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changeset
|
222 |
|
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|
223 |
//////////////////////////////////////////////////////////////// |
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224 |
// N level deep on score value + max value prefer corner, |
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225 |
// without random simulation. |
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226 |
//////////////////////////////////////////////////////////////// |
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227 |
|
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228 |
/* cfg.cornerBonus - value to add if max value at corner. */ |
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229 |
/* cfg.edgeBonus - value to add if max value at edge. */ |
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230 |
ai.deepMaxScoreCorner = function(brdEngine, cfg) { |
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231 |
this.brdEngine = brdEngine; |
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this.cfg = cfg || {}; |
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233 |
this.cfg.cornerBonus = this.cfg.cornerBonus || 20000; |
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234 |
this.cfg.edgeBonus = this.cfg.edgeBonus || 100; |
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235 |
this.cfg.freeBonus = this.cfg.edgeBonus || 100; |
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236 |
} |
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237 |
ai.deepMaxScoreCorner.prototype.scoreCorner = function(brd) { |
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238 |
var score = brd.score(); |
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239 |
var max = brd.max(); |
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240 |
if (brd.atCorner(max)) |
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241 |
score += this.cfg.cornerBonus; |
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242 |
else if (brd.atEdge(max)) |
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243 |
score += this.cfg.edgeBonus; |
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244 |
score += brd.free() * this.cfg.freeBonus; |
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245 |
return score; |
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246 |
} |
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247 |
ai.deepMaxScoreCorner.prototype.scoreEdge = function(brd) { |
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248 |
var score = brd.score(); |
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249 |
var max = brd.max(); |
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250 |
if (brd.atEdge(max)) |
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251 |
score += this.cfg.edgeBonus; |
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252 |
score += brd.free() * this.cfg.freeBonus; |
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253 |
return score; |
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254 |
} |
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255 |
ai.deepMaxScoreCorner.prototype.analyse = function(brd) { |
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256 |
var origBrd = new this.brdEngine(brd); |
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257 |
var nextBrd = new this.brdEngine(); |
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258 |
var prevScore = -1, nextScore = -1; |
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259 |
var maxScore = -1; |
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260 |
var bestDir; |
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261 |
for (var i = 0; i < ai.dirs.length; i++) { |
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262 |
var dir = ai.dirs[i]; |
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263 |
if (origBrd[dir](nextBrd)) { |
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264 |
nextScore = this.scoreCorner(nextBrd); |
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265 |
var score = this.bestScore(nextBrd); |
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266 |
// console.log("dir: %o, prevScore: %o, nextScore: %o, maxScore: %o, score: %o", dir, prevScore, nextScore, maxScore, score); |
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267 |
if (maxScore < score || (maxScore === score && prevScore < nextScore)) { |
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268 |
prevScore = nextScore; |
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269 |
maxScore = score; |
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270 |
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.deepMaxScoreCorner.prototype.bestScore = function(brd, seenBrds) { |
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277 |
if (seenBrds) { |
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278 |
for (var i = 0; i < seenBrds.length; i++) |
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279 |
if (brd.equals(seenBrds[i])) |
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280 |
return 0; |
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281 |
} else { |
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282 |
seenBrds = []; |
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283 |
} |
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|
284 |
seenBrds.push(brd); |
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|
285 |
var currScore = this.scoreEdge(brd); |
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|
286 |
var maxScore = currScore; |
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|
287 |
var nextBrd = new this.brdEngine(); |
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288 |
for (var i = 0; i < ai.dirs.length; i++) { |
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|
289 |
if (brd[ai.dirs[i]](nextBrd)) { |
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|
290 |
var score = this.scoreEdge(nextBrd); |
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|
291 |
if (score > currScore) |
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292 |
maxScore = Math.max(maxScore, this.bestScore(nextBrd, seenBrds)); |
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|
293 |
} |
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|
294 |
} |
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|
295 |
return maxScore; |
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|
296 |
} |
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|
297 |
/* Mark that next board will be unrelated to previous, so any stored precompution can be cleared. */ |
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298 |
ai.deepMaxScoreCorner.prototype.cleanup = function() { } |
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|
299 |
|
21
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|
300 |
|
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|
301 |
//////////////////////////////////////////////////////////////// |
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302 |
// N level deep with random simulation. |
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|
303 |
//////////////////////////////////////////////////////////////// |
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|
304 |
|
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|
305 |
/* cfg.cornerBonus - value to add if max value at corner. */ |
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|
306 |
/* cfg.edgeBonus - value to add if max value at edge. */ |
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|
307 |
ai.expectimax = function(brdEngine, cfg) { |
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|
308 |
this.brdEngine = brdEngine; |
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|
309 |
this.cfg = cfg || {}; |
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|
310 |
this.cfg.balance = this.cfg.balance || .9; |
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311 |
if (!this.cfg.depth || this.cfg.depth < 0 || 8 <= this.cfg.depth) |
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312 |
this.cfg.depth = 5; |
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|
313 |
this.cfg.cornerBonus = this.cfg.cornerBonus || 20000; |
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|
314 |
this.cfg.edgeBonus = this.cfg.edgeBonus || 100; |
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|
315 |
this.cfg.freeBonus = this.cfg.edgeBonus || 100; |
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|
316 |
this.cfg.weightPriority = this.cfg.weightPriority || 10; |
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|
317 |
} |
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318 |
ai.expectimax.prototype.lvl1Score = function(brd) { |
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|
319 |
var score = brd.score(); |
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|
320 |
var max = brd.max(); |
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|
321 |
if (brd.atCorner(max)) |
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|
322 |
score += this.cfg.cornerBonus; |
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|
323 |
else if (brd.atEdge(max)) |
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|
324 |
score += this.cfg.edgeBonus; |
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|
325 |
score += brd.free() * this.cfg.freeBonus; |
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|
326 |
return score; |
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Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
327 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
328 |
ai.expectimax.prototype.lvlnScore = function(brd) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
329 |
var score = brd.score(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
330 |
// var max = brd.max(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
331 |
// if (brd.atCorner(max)) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
332 |
// score += this.cfg.cornerBonus; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
333 |
// else if (brd.atEdge(max)) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
334 |
// score += this.cfg.edgeBonus; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
335 |
// score += brd.free() * this.cfg.freeBonus; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
336 |
return score; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
337 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
338 |
ai.expectimax.prototype.analyse = function(brd) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
339 |
var origBrd = new this.brdEngine(brd); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
340 |
var nextBrd = new this.brdEngine(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
341 |
var prevScore = -1, nextScore = -1; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
342 |
var maxWeight = -1; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
343 |
var bestDir; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
344 |
this.cleanup(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
345 |
for (var i = 0; i < ai.dirs.length; i++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
346 |
var dir = ai.dirs[i]; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
347 |
if (origBrd[dir](nextBrd)) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
348 |
nextScore = this.lvl1Score(nextBrd); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
349 |
var weight = this.weight(nextBrd, 0); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
350 |
// console.log("dir: %o, prevScore: %o, nextScore: %o, maxWeight: %o, weight: %o", dir, prevScore, nextScore, maxWeight, weight); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
351 |
if (maxWeight + this.cfg.weightPriority < weight || (maxWeight <= weight && prevScore < nextScore)) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
352 |
prevScore = nextScore; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
353 |
maxWeight = weight; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
354 |
bestDir = dir; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
355 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
356 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
357 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
358 |
this.cleanup(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
359 |
return bestDir; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
360 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
361 |
ai.expectimax.prototype.weight = function(brd, depth) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
362 |
if (depth === this.cfg.depth) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
363 |
return this.lvlnScore(brd); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
364 |
if (this.cache[depth]) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
365 |
var cache = this.cache[depth]; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
366 |
for (var i = cache.length-1; i >= 0; i--) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
367 |
if (brd.equals(cache[i].brd)) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
368 |
return cache[i].weight; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
369 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
370 |
} else { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
371 |
this.cache[depth] = []; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
372 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
373 |
var weight = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
374 |
var free = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
375 |
for (var i = 0; i < 3; i++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
376 |
for (var j = 0; j < 3; j++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
377 |
if (brd.get(i, j) === 0) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
378 |
var randBoard = brd.copy(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
379 |
randBoard.set(i, j, 1); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
380 |
var nextBrd = new this.brdEngine(); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
381 |
var n = 0, w = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
382 |
for (var diri = 0; diri < ai.dirs.length; diri++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
383 |
if (randBoard[ai.dirs[diri]](nextBrd)) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
384 |
w += this.weight(nextBrd, depth+1); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
385 |
n++; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
386 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
387 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
388 |
if (n > 0) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
389 |
w = w / n; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
390 |
weight += this.cfg.balance * w; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
391 |
randBoard.set(i, j, 2); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
392 |
var n = 0, w = 0; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
393 |
for (var diri = 0; diri < ai.dirs.length; diri++) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
394 |
if (randBoard[ai.dirs[diri]](nextBrd)) { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
395 |
w += this.weight(nextBrd, depth+1); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
396 |
n++; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
397 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
398 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
399 |
if (n > 0) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
400 |
w = w / n; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
401 |
weight += this.cfg.balance * w; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
402 |
free++; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
403 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
404 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
405 |
} |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
406 |
if (free > 0) |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
407 |
weight = weight / free; |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
408 |
this.cache[depth].push({brd: brd, weight: weight}); |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
409 |
return weight; |
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 |
/* 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
|
412 |
ai.expectimax.prototype.cleanup = function() { |
ed0292f0c7c6
Expectimax implementation.
Oleksandr Gavenko <gavenkoa@gmail.com>
parents:
20
diff
changeset
|
413 |
this.cache = []; |
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 |