machfe

这个多边形有bug，原版的libtess2依然存在。

2

LINEARRING (12950683.477174498 4833655.12708581, 12950590.169765407 4833661.971891628, 12950546.108769631 4833665.209252961, 12950491.653217828 4833669.220052718, 12950434.612983717 4833673.424716553, 12950395.787768705 4833676.280624169, 12950341.376471192 4833680.274143135, 12950320.64067631 4833681.800466419, 12950314.531079613 4833682.251894767, 12950314.560554624 4833682.650807318, 12950320.670093225 4833682.1993832635, 12950341.405789915 4833680.6730672065, 12950395.817076804 4833676.679549021, 12950434.642359095 4833673.823636455, 12950491.682602832...