class='id identifier rubyid_sprite'>sprite</span><span class='lbracket'>[</span><span class='symbol'>:source_x</span><span class='rbracket'>]</span>          <span class='kw'>if</span> <span class='id identifier rubyid_sprite'>sprite</span><span class='lbracket'>[</span><span class='symbol'>:source_x</span><span class='rbracket'>]</span>
  <span class='ivar'>@source_y</span>         <span class='op'>=</span> <span class='id identifier rubyid_sprite'>sprite</span><span class='lbracket'>[</span><span class='s