好吧!首次实施!(java),基于@Paul 的 回答:
List<Rectangle> slice(Rectangle r, Rectangle mask)
{
List<Rectangle> rects = new ArrayList();
mask = mask.intersection(r);
if(!mask.isEmpty())
{
rects.add(new Rectangle(r.x, r.y, r.width, mask.y - r.y));
rects.add(new Rectangle(r.x, mask.y + mask.height, r.width, (r.y + r.height) - (mask.y + mask.height)));
rects.add(new Rectangle(r.x, mask.y, mask.x - r.x, mask.height));
rects.add(new Rectangle(mask.x + mask.width, mask.y, (r.x + r.width) - (mask.x + mask.width), mask.height));
for (Iterator<Rectangle> iter = rects.iterator(); iter.hasNext();)
if(iter.next().isEmpty())
iter.remove();
}
else rects.add(r);
return rects;
}
List<Rectangle> inverse(Rectangle base, List<Rectangle> rects)
{
List<Rectangle> outputs = new ArrayList();
outputs.add(base);
for(Rectangle r : rects)
{
List<Rectangle> newOutputs = new ArrayList();
for(Rectangle output : outputs)
{
newOutputs.addAll(slice(output, r));
}
outputs = newOutputs;
}
return outputs;
}
可能在这里工作的例子