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vec vsq[] = { {0,0}, {10,0}, {10,10}, {0,10}, {2.5,2.5}, {7.5,0.1}, {7.5,7.5}, {2.5,7.5}}; polygon_t sq = { 4, vsq }, /* outer square */ sq_hole = { 8, vsq }; /* outer and inner square, ie hole */复制代码
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