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8 <title>possible_moves (Game)
</title>
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13 <pre><span class=
"ruby-comment cmt"># File lib/libttc.rb, line
504</span>
14 <span class=
"ruby-keyword kw">def
</span> <span class=
"ruby-identifier">possible_moves
</span>(
<span class=
"ruby-identifier">die_result
</span>,
<span class=
"ruby-identifier">player
</span> =
<span class=
"ruby-ivar">@current_player
</span>)
15 <span class=
"ruby-identifier">moves
</span> = []
16 <span class=
"ruby-ivar">@pieces
</span>.
<span class=
"ruby-identifier">each
</span> <span class=
"ruby-keyword kw">do
</span> <span class=
"ruby-operator">|
</span><span class=
"ruby-identifier">key
</span>,
<span class=
"ruby-identifier">piece
</span><span class=
"ruby-operator">|
</span>
17 <span class=
"ruby-comment cmt"># only move current player's pieces, and only if they're not captured
</span>
18 <span class=
"ruby-keyword kw">if
</span> <span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">colour
</span> <span class=
"ruby-operator">==
</span> <span class=
"ruby-identifier">player
</span> <span class=
"ruby-keyword kw">and
</span> (
<span class=
"ruby-keyword kw">not
</span> <span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">captured
</span>)
19 (
<span class=
"ruby-ivar">@board
</span>.
<span class=
"ruby-identifier">valid_moves
</span>[
<span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">position
</span>.
<span class=
"ruby-identifier">place
</span>][
<span class=
"ruby-identifier">die_result
</span>]).
<span class=
"ruby-identifier">each
</span> <span class=
"ruby-keyword kw">do
</span> <span class=
"ruby-operator">|
</span><span class=
"ruby-identifier">destination
</span><span class=
"ruby-operator">|
</span>
20 <span class=
"ruby-keyword kw">if
</span> <span class=
"ruby-identifier">destination
</span>.
<span class=
"ruby-identifier">safe?
</span>
21 <span class=
"ruby-keyword kw">if
</span> (
<span class=
"ruby-ivar">@pieces
</span>.
<span class=
"ruby-identifier">find_all
</span> {
<span class=
"ruby-operator">|
</span><span class=
"ruby-identifier">k
</span>,
<span class=
"ruby-identifier">p
</span><span class=
"ruby-operator">|
</span> <span class=
"ruby-identifier">p
</span>.
<span class=
"ruby-identifier">position
</span> <span class=
"ruby-operator">==
</span> <span class=
"ruby-identifier">destination
</span>}).
<span class=
"ruby-identifier">length
</span> <span class=
"ruby-operator"><</span> <span class=
"ruby-value">3</span>
22 <span class=
"ruby-identifier">moves
</span> <span class=
"ruby-operator"><<</span> <span class=
"ruby-constant">Move
</span>.
<span class=
"ruby-identifier">new
</span>(
<span class=
"ruby-identifier">piece
</span>,
<span class=
"ruby-identifier">destination
</span>,
<span class=
"ruby-keyword kw">false
</span>)
23 <span class=
"ruby-keyword kw">end
</span>
24 <span class=
"ruby-keyword kw">else
</span>
25 <span class=
"ruby-identifier">moves
</span> <span class=
"ruby-operator"><<</span> <span class=
"ruby-constant">Move
</span>.
<span class=
"ruby-identifier">new
</span>(
<span class=
"ruby-identifier">piece
</span>,
<span class=
"ruby-identifier">destination
</span>,
<span class=
"ruby-keyword kw">false
</span>)
<span class=
"ruby-keyword kw">unless
</span> <span class=
"ruby-identifier">destination
</span>.
<span class=
"ruby-identifier">base?
</span>
26 <span class=
"ruby-keyword kw">end
</span>
27 <span class=
"ruby-keyword kw">end
</span>
28 <span class=
"ruby-comment cmt"># if we can move to our base (but not already on it), add moves via that...
</span>
29 <span class=
"ruby-keyword kw">if
</span> <span class=
"ruby-ivar">@board
</span>.
<span class=
"ruby-identifier">distance_between
</span>[
<span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">position
</span>.
<span class=
"ruby-identifier">place
</span>][
<span class=
"ruby-identifier">player
</span>]
<span class=
"ruby-operator"><=
</span> <span class=
"ruby-identifier">die_result
</span> <span class=
"ruby-keyword kw">and
</span>
30 <span class=
"ruby-keyword kw">not
</span> <span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">position
</span>.
<span class=
"ruby-identifier">place
</span> <span class=
"ruby-operator">==
</span> <span class=
"ruby-identifier">player
</span> <span class=
"ruby-keyword kw">and
</span>
31 <span class=
"ruby-keyword kw">not
</span> <span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">contains
</span>.
<span class=
"ruby-identifier">empty?
</span>
32 <span class=
"ruby-identifier">distance_after_base
</span> =
<span class=
"ruby-identifier">die_result
</span> <span class=
"ruby-operator">-
</span> <span class=
"ruby-ivar">@board
</span>.
<span class=
"ruby-identifier">distance_between
</span>[
<span class=
"ruby-identifier">piece
</span>.
<span class=
"ruby-identifier">position
</span>.
<span class=
"ruby-identifier">place
</span>][
<span class=
"ruby-identifier">player
</span>]
33 (
<span class=
"ruby-ivar">@board
</span>.
<span class=
"ruby-identifier">valid_moves
</span>[
<span class=
"ruby-identifier">player
</span>][
<span class=
"ruby-identifier">distance_after_base
</span>]).
<span class=
"ruby-identifier">each
</span> <span class=
"ruby-keyword kw">do
</span> <span class=
"ruby-operator">|
</span><span class=
"ruby-identifier">destination
</span><span class=
"ruby-operator">|
</span>
34 <span class=
"ruby-keyword kw">if
</span> <span class=
"ruby-identifier">destination
</span>.
<span class=
"ruby-identifier">safe?
</span>
35 <span class=
"ruby-keyword kw">if
</span> (
<span class=
"ruby-ivar">@pieces
</span>.
<span class=
"ruby-identifier">find_all
</span> {
<span class=
"ruby-operator">|
</span><span class=
"ruby-identifier">k
</span>,
<span class=
"ruby-identifier">p
</span><span class=
"ruby-operator">|
</span> <span class=
"ruby-identifier">p
</span>.
<span class=
"ruby-identifier">position
</span> <span class=
"ruby-operator">==
</span> <span class=
"ruby-identifier">destination
</span>}).
<span class=
"ruby-identifier">length
</span> <span class=
"ruby-operator"><</span> <span class=
"ruby-value">3</span>
36 <span class=
"ruby-identifier">moves
</span> <span class=
"ruby-operator"><<</span> <span class=
"ruby-constant">Move
</span>.
<span class=
"ruby-identifier">new
</span>(
<span class=
"ruby-identifier">piece
</span>,
<span class=
"ruby-identifier">destination
</span>,
<span class=
"ruby-keyword kw">true
</span>)
37 <span class=
"ruby-keyword kw">end
</span>
38 <span class=
"ruby-keyword kw">else
</span>
39 <span class=
"ruby-identifier">moves
</span> <span class=
"ruby-operator"><<</span> <span class=
"ruby-constant">Move
</span>.
<span class=
"ruby-identifier">new
</span>(
<span class=
"ruby-identifier">piece
</span>,
<span class=
"ruby-identifier">destination
</span>,
<span class=
"ruby-keyword kw">true
</span>)
40 <span class=
"ruby-keyword kw">end
</span>
41 <span class=
"ruby-keyword kw">end
</span>
42 <span class=
"ruby-keyword kw">end
</span>
43 <span class=
"ruby-keyword kw">end
</span>
44 <span class=
"ruby-keyword kw">end
</span>
45 <span class=
"ruby-identifier">moves
</span>
46 <span class=
"ruby-keyword kw">end
</span></pre>