        stackEnd = stack <span class="keyword">if</span> i <span class="keyword">is</span> radiusPlus1
      
      stack.next = stackStart
      stackIn = <span class="literal">null</span>
      stackOut = <span class="literal">null</span>

      yw = yi = <span class="number">0</span>

      mul_sum = mul_table[iradius]
      shg_sum = shg_table[iradius]

      <span class="keyword">for</span> y <span class="keyword">in</span> [<span class="number">0.</span>..height]
        r_in_sum = g_in_sum = b_in_sum