<span class="c">!</span>
<span class="k">use </span><span class="n">M_pixel</span><span class="w"></span>
<span class="k">implicit none</span>
<span class="kt">real</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">vpx</span><span class="w"></span>
<span class="kt">real</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">vpy</span><span class="w"></span>
<span class="kt">real</span><span class="w"> </span><span class="