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  <title>centerOn (GGLib::Tile)</title>
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  <pre><span class="ruby-comment cmt"># File tile.rb, line 60</span>
    <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">centerOn</span>(<span class="ruby-identifier">x</span>, <span class="ruby-identifier">y</span>)
      <span class="ruby-identifier">hwidth</span>=((<span class="ruby-ivar">@x2</span><span class="ruby-operator">-</span><span class="ruby-ivar">@x1</span>)<span class="ruby-operator">/</span><span class="ruby-value">2</span>).<span class="ruby-identifier">ceil</span>.<span class="ruby-identifier">abs</span>
      <span class="ruby-identifier">hheight</span>=((<span class="ruby-ivar">@y2</span><span class="ruby-operator">-</span><span class="ruby-ivar">@y1</span>)<span class="ruby-operator">/</span><span class="ruby-value">2</span>).<span class="ruby-identifier">ceil</span>.<span class="ruby-identifier">abs</span>
      <span class="ruby-ivar">@x2</span>=<span class="ruby-identifier">x</span><span class="ruby-operator">+</span><span class="ruby-identifier">hwidth</span>
      <span class="ruby-ivar">@y2</span>=<span class="ruby-identifier">y</span><span class="ruby-operator">+</span><span class="ruby-identifier">hheight</span>
      <span class="ruby-ivar">@y1</span>=<span class="ruby-identifier">y</span><span class="ruby-operator">-</span><span class="ruby-identifier">hheight</span>
      <span class="ruby-ivar">@x1</span>=<span class="ruby-identifier">x</span><span class="ruby-operator">-</span><span class="ruby-identifier">hwidth</span>
    <span class="ruby-keyword kw">end</span></pre>
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gglib-1.3.0 doc/classes/GGLib/Tile.src/M000095.html