   context.fillRect(<span class="number">0</span>, <span class="number">0</span>, width, height)
    <span class="keyword">return</span> context.getImageData(<span class="number">0</span>, <span class="number">0</span>, width, height)

  <span class="function"><span class="title">getRadialGradientMap</span></span> = (width, height, centerX, centerY, radius1, radius2) -&gt;
    cnv = <span class="keyword">if</span> exports? <span class="keyword">then</span> <span class="keyword">new</span> Canvas() <span cla