doc/classes/Board.src/M000054.html

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  13   <pre><span class="ruby-comment cmt"># File lib/libttc.rb, line 94</span>
  14   <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">spokes</span>, <span class="ruby-identifier">spoke_length</span>, <span class="ruby-identifier">arc_length</span>)
  15     <span class="ruby-comment cmt"># A hash of all positions, indexed by position names</span>
  16     <span class="ruby-ivar">@positions</span> = <span class="ruby-constant">Hash</span>.<span class="ruby-identifier">new</span>
  17     <span class="ruby-ivar">@centre</span> = <span class="ruby-constant">Position</span>.<span class="ruby-identifier">new</span>(<span class="ruby-value str">'ac'</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">spoke_length</span>.<span class="ruby-identifier">to_s</span>, <span class="ruby-keyword kw">false</span>, <span class="ruby-keyword kw">false</span>)
  18     <span class="ruby-ivar">@positions</span>[<span class="ruby-value str">'ac'</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">spoke_length</span>.<span class="ruby-identifier">to_s</span>] = <span class="ruby-identifier">centre</span>
  19     <span class="ruby-identifier">a1_corner</span> = <span class="ruby-keyword kw">nil</span>
  20     <span class="ruby-identifier">end_of_previous_arc</span> = <span class="ruby-keyword kw">nil</span>
  21
  22     <span class="ruby-comment cmt"># Do each arc-spoke-base set</span>
  23     (<span class="ruby-value">?a</span><span class="ruby-operator">...</span>(<span class="ruby-value">?a</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">spokes</span>)).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">arc_code</span><span class="ruby-operator">|</span>
  24       <span class="ruby-identifier">arc</span> = <span class="ruby-identifier">arc_code</span>.<span class="ruby-identifier">chr</span>
  25       <span class="ruby-identifier">base</span> = <span class="ruby-constant">Position</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">arc</span>, <span class="ruby-keyword kw">false</span>, <span class="ruby-keyword kw">true</span>)
  26       <span class="ruby-identifier">this_arc</span> = <span class="ruby-constant">Array</span>.<span class="ruby-identifier">new</span>
  27
  28       <span class="ruby-comment cmt"># build the arc</span>
  29       (<span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-identifier">arc_length</span>).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">arc_position</span><span class="ruby-operator">|</span>
  30         <span class="ruby-identifier">position_name</span> = <span class="ruby-identifier">arc</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">arc_position</span>.<span class="ruby-identifier">to_s</span>
  31         <span class="ruby-identifier">arc_place</span> = <span class="ruby-constant">Position</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">position_name</span>, <span class="ruby-identifier">arc_position</span> <span class="ruby-operator">==</span> <span class="ruby-value">4</span>, <span class="ruby-keyword kw">false</span>)
  32         <span class="ruby-identifier">arc_place</span>.<span class="ruby-identifier">neighbours</span> = []
  33         <span class="ruby-ivar">@positions</span>[<span class="ruby-identifier">position_name</span>] = <span class="ruby-identifier">arc_place</span>
  34         <span class="ruby-identifier">this_arc</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">arc_place</span>
  35         <span class="ruby-identifier">a1_corner</span> = <span class="ruby-identifier">a1_corner</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">arc_place</span>
  36       <span class="ruby-keyword kw">end</span>
  37       (<span class="ruby-value">0</span><span class="ruby-operator">...</span><span class="ruby-identifier">arc_length</span>).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">arc_position</span><span class="ruby-operator">|</span>
  38         <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">arc_position</span> <span class="ruby-operator">&gt;</span> <span class="ruby-value">0</span>
  39           <span class="ruby-identifier">this_arc</span>[<span class="ruby-identifier">arc_position</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_arc</span>[<span class="ruby-identifier">arc_position</span> <span class="ruby-operator">-</span> <span class="ruby-value">1</span>]
  40         <span class="ruby-keyword kw">end</span>
  41         <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">arc_position</span> <span class="ruby-operator">&lt;</span> (<span class="ruby-identifier">arc_length</span> <span class="ruby-operator">-</span> <span class="ruby-value">1</span>)
  42           <span class="ruby-identifier">this_arc</span>[<span class="ruby-identifier">arc_position</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_arc</span>[<span class="ruby-identifier">arc_position</span> <span class="ruby-operator">+</span> <span class="ruby-value">1</span>]
  43         <span class="ruby-keyword kw">end</span>
  44       <span class="ruby-keyword kw">end</span>
  45
  46       <span class="ruby-comment cmt"># build the spoke</span>
  47       <span class="ruby-identifier">this_spoke</span> = <span class="ruby-constant">Array</span>.<span class="ruby-identifier">new</span>
  48       (<span class="ruby-value">1</span><span class="ruby-operator">..</span>(<span class="ruby-identifier">spoke_length</span> <span class="ruby-operator">-</span> <span class="ruby-value">1</span>)).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">spoke_position</span><span class="ruby-operator">|</span>
  49         <span class="ruby-identifier">position_name</span> = <span class="ruby-identifier">arc</span> <span class="ruby-operator">+</span> <span class="ruby-value str">&quot;c&quot;</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">spoke_position</span>.<span class="ruby-identifier">to_s</span>
  50         <span class="ruby-identifier">spoke_place</span> = <span class="ruby-constant">Position</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">position_name</span>, <span class="ruby-identifier">spoke_position</span> <span class="ruby-operator">==</span> <span class="ruby-value">3</span>, <span class="ruby-keyword kw">false</span>)
  51         <span class="ruby-identifier">spoke_place</span>.<span class="ruby-identifier">neighbours</span> = []
  52         <span class="ruby-ivar">@positions</span>[<span class="ruby-identifier">position_name</span>] = <span class="ruby-identifier">spoke_place</span>
  53         <span class="ruby-identifier">this_spoke</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">spoke_place</span>
  54       <span class="ruby-keyword kw">end</span>
  55       (<span class="ruby-value">0</span><span class="ruby-operator">...</span>(<span class="ruby-identifier">spoke_length</span> <span class="ruby-operator">-</span> <span class="ruby-value">1</span>)).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">spoke_position</span><span class="ruby-operator">|</span>
  56         <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">spoke_position</span> <span class="ruby-operator">&gt;</span> <span class="ruby-value">0</span>
  57           <span class="ruby-identifier">this_spoke</span>[<span class="ruby-identifier">spoke_position</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_spoke</span>[<span class="ruby-identifier">spoke_position</span> <span class="ruby-operator">-</span> <span class="ruby-value">1</span>]
  58         <span class="ruby-keyword kw">end</span>
  59         <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">spoke_position</span> <span class="ruby-operator">&lt;</span> <span class="ruby-identifier">spoke_length</span> <span class="ruby-operator">-</span> <span class="ruby-value">2</span>
  60           <span class="ruby-identifier">this_spoke</span>[<span class="ruby-identifier">spoke_position</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_spoke</span>[<span class="ruby-identifier">spoke_position</span> <span class="ruby-operator">+</span> <span class="ruby-value">1</span>]
  61         <span class="ruby-keyword kw">end</span>
  62       <span class="ruby-keyword kw">end</span>
  63
  64       <span class="ruby-comment cmt"># tie the spoke and arc together, </span>
  65       <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">0</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_spoke</span>[<span class="ruby-value">0</span>]
  66       <span class="ruby-identifier">this_spoke</span>[<span class="ruby-value">0</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">0</span>]
  67
  68       <span class="ruby-comment cmt"># tie the spoke to the centre, and</span>
  69       <span class="ruby-identifier">this_spoke</span>[<span class="ruby-value">-1</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-ivar">@centre</span>
  70       <span class="ruby-ivar">@centre</span>.<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_spoke</span>[<span class="ruby-value">-1</span>]
  71
  72       <span class="ruby-comment cmt"># tie the base to the arc</span>
  73       <span class="ruby-identifier">base</span> = <span class="ruby-constant">Position</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">arc</span>, <span class="ruby-keyword kw">false</span>, <span class="ruby-keyword kw">true</span>)
  74       <span class="ruby-ivar">@positions</span>[<span class="ruby-identifier">arc</span>] = <span class="ruby-identifier">base</span>
  75       <span class="ruby-identifier">base</span>.<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">0</span>]
  76       <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">0</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">base</span>
  77
  78       <span class="ruby-comment cmt"># record the ends of the arc for tying to adjacent arcs</span>
  79       <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">end_of_previous_arc</span>
  80         <span class="ruby-identifier">end_of_previous_arc</span>.<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">0</span>]
  81         <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">0</span>].<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">end_of_previous_arc</span>
  82       <span class="ruby-keyword kw">end</span>
  83       <span class="ruby-identifier">end_of_previous_arc</span> = <span class="ruby-identifier">this_arc</span>[<span class="ruby-value">-1</span>]
  84
  85     <span class="ruby-keyword kw">end</span> <span class="ruby-comment cmt"># arc</span>
  86
  87     <span class="ruby-comment cmt"># tie both ends of the rim together </span>
  88     <span class="ruby-identifier">a1_corner</span>.<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">end_of_previous_arc</span>
  89     <span class="ruby-identifier">end_of_previous_arc</span>.<span class="ruby-identifier">neighbours</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">a1_corner</span>
  90
  91     <span class="ruby-identifier">cache_valid_moves</span>
  92
  93   <span class="ruby-keyword kw">end</span></pre>
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