bug in polygonset::resize()

[Jay Huang <yhuangza@…>]

Hi,

I found two bug in polygonset::resize() as follows,

  //bug1
    std::vector<Point> pts;
    Polygon             poly;
    PolygonSet          polySet, polySetResult;

    pts.clear();
    pts.push_back(Point( 6300,  0));
    pts.push_back(Point( 0,  0));
    pts.push_back(Point( 0,  4750));
    pts.push_back(Point( 1250,  6000));
    pts.push_back(Point( 1250,  7500));
    pts.push_back(Point( 2850,  7500));
    pts.push_back(Point( 2850,  5950));
    pts.push_back(Point( 5950,  5950));
    pts.push_back(Point( 5950,  5750));
    pts.push_back(Point( 6300,  5400));

    boost::polygon::set_points(poly, pts.begin(), pts.end());

    polySet += poly;
    polySetResult += polySet-1000;

  //bug2
    std::vector<Point> pts2;
    Polygon             poly2;
    PolygonSet          polySet2, polySetResult2;

    pts2.clear();
    pts2.push_back(Point(2100, 2575));
    pts2.push_back(Point(1700, 2575));
    pts2.push_back(Point(1700, 2365));
    pts2.push_back(Point(1800, 2265));
    pts2.push_back(Point(1835, 2265));
    pts2.push_back(Point(1835, 1945));
    pts2.push_back(Point(1645, 1945));
    pts2.push_back(Point(1645, 2305));
    pts2.push_back(Point(1440, 2305));
    pts2.push_back(Point(1440, 2790));
    pts2.push_back(Point(1145, 2790));
    pts2.push_back(Point(1145, 1805));
    pts2.push_back(Point(2100, 1805));

    boost::polygon::set_points(poly2, pts2.begin(), pts2.end());

    polySet2 += poly2;
    polySetResult2 += polySet2+100;

For bug one,

current result : { 1000 4336, 1000 1000, 5300 1000, 5300 4986, 4950 5336, 4950 4950, 1850 4950, 1850 5186} correct result : { 1000 4336, 1000 1000, 5300 1000, 5300 4950, 1850 4950, 1850 5186}

For bug two, the result is a polygon with hole. However, I think there shall be no hole in the result.

Please check and thanks for your help.

Regards, Jay Huang