the-great-game/docs/cloverage/the_great_game/world/location.clj.html
2021-02-19 23:44:46 +00:00

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<link rel="stylesheet" href="../../coverage.css"/> <title> the_great_game/world/location.clj </title>
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001&nbsp;&nbsp;(ns&nbsp;the-great-game.world.location
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002&nbsp;&nbsp;&nbsp;&nbsp;&quot;Functions&nbsp;dealing&nbsp;with&nbsp;location&nbsp;in&nbsp;the&nbsp;world.&quot;
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003&nbsp;&nbsp;&nbsp;&nbsp;(:require&nbsp;[clojure.math.numeric-tower&nbsp;:refer&nbsp;[expt&nbsp;sqrt]]))
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004&nbsp;&nbsp;
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005&nbsp;&nbsp;;;&nbsp;&nbsp;&nbsp;A&nbsp;&#x27;location&#x27;&nbsp;value&nbsp;is&nbsp;a&nbsp;list&nbsp;comprising&nbsp;at&nbsp;most&nbsp;the&nbsp;x&#x2F;y&nbsp;coordinate&nbsp;location
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006&nbsp;&nbsp;;;&nbsp;&nbsp;&nbsp;and&nbsp;the&nbsp;ids&nbsp;of&nbsp;the&nbsp;settlement&nbsp;and&nbsp;region&nbsp;(possibly&nbsp;hierarchically)&nbsp;that&nbsp;contain
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007&nbsp;&nbsp;;;&nbsp;&nbsp;&nbsp;the&nbsp;location.&nbsp;If&nbsp;the&nbsp;x&#x2F;y&nbsp;is&nbsp;not&nbsp;local&nbsp;to&nbsp;the&nbsp;home&nbsp;of&nbsp;the&nbsp;receiving&nbsp;agent,&nbsp;they
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008&nbsp;&nbsp;;;&nbsp;&nbsp;&nbsp;won&#x27;t&nbsp;remember&nbsp;it&nbsp;and&nbsp;won&#x27;t&nbsp;pass&nbsp;it&nbsp;on;&nbsp;if&nbsp;any&nbsp;of&nbsp;the&nbsp;ids&nbsp;are&nbsp;not&nbsp;interesting
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009&nbsp;&nbsp;;;&nbsp;&nbsp;&nbsp;So&nbsp;location&nbsp;information&nbsp;will&nbsp;degrade&nbsp;progressively&nbsp;as&nbsp;the&nbsp;item&nbsp;is&nbsp;passed&nbsp;along.
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010&nbsp;&nbsp;
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011&nbsp;&nbsp;;;&nbsp;&nbsp;&nbsp;It&nbsp;is&nbsp;assumed&nbsp;that&nbsp;the&nbsp;`:home`&nbsp;of&nbsp;a&nbsp;character&nbsp;is&nbsp;a&nbsp;location&nbsp;in&nbsp;this&nbsp;sense.
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012&nbsp;&nbsp;
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013&nbsp;&nbsp;(defn&nbsp;get-coords
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014&nbsp;&nbsp;&nbsp;&nbsp;&quot;Return&nbsp;the&nbsp;coordinates&nbsp;in&nbsp;the&nbsp;game&nbsp;world&nbsp;of&nbsp;`location`,&nbsp;which&nbsp;may&nbsp;be
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015&nbsp;&nbsp;&nbsp;&nbsp;1.&nbsp;A&nbsp;coordinate&nbsp;pair&nbsp;in&nbsp;the&nbsp;format&nbsp;{:x&nbsp;5&nbsp;:y&nbsp;32};
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016&nbsp;&nbsp;&nbsp;&nbsp;2.&nbsp;A&nbsp;location,&nbsp;as&nbsp;discussed&nbsp;above;
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017&nbsp;&nbsp;&nbsp;&nbsp;3.&nbsp;Any&nbsp;other&nbsp;gameworld&nbsp;object,&nbsp;having&nbsp;a&nbsp;`:location`&nbsp;property&nbsp;whose&nbsp;value
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018&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;is&nbsp;one&nbsp;of&nbsp;the&nbsp;above.&quot;
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019&nbsp;&nbsp;&nbsp;&nbsp;[location]
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020&nbsp;&nbsp;&nbsp;&nbsp;(cond
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021&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(empty?&nbsp;location)&nbsp;nil
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022&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(map?&nbsp;location)
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023&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(cond
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024&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(and&nbsp;(number?&nbsp;(:x&nbsp;location))&nbsp;(number?&nbsp;(:y&nbsp;location)))
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025&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;location
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026&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(:location&nbsp;location)
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027&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(:location&nbsp;location))
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028&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:else
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029&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(get-coords&nbsp;(first&nbsp;(remove&nbsp;keyword?&nbsp;location)))))
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030&nbsp;&nbsp;
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031&nbsp;&nbsp;(defn&nbsp;distance-between
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032&nbsp;&nbsp;&nbsp;&nbsp;[location-1&nbsp;location-2]
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033&nbsp;&nbsp;&nbsp;&nbsp;(let&nbsp;[c1&nbsp;(get-coords&nbsp;location-1)
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034&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c2&nbsp;(get-coords&nbsp;location-2)]
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035&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(when
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036&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(and&nbsp;c1&nbsp;c2)
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037&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(sqrt&nbsp;(+&nbsp;(expt&nbsp;(-&nbsp;(:x&nbsp;c1)&nbsp;(:x&nbsp;c2))&nbsp;2)&nbsp;(expt&nbsp;(-&nbsp;(:y&nbsp;c1)&nbsp;(:y&nbsp;c2))&nbsp;2))))))
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