我正在尝试使用 Clipper 库按线分割多边形。执行裁剪后,返回空路径。有人可以建议正确的方法来做同样的事情吗?
Paths clip(2),soln;
clip[0] << IntPoint(-264,-210) << IntPoint(650,-209);
Path sub = clip[0];
Path poly << IntPoint(531,49) << IntPoint(-21,49) << IntPoint(-970,-961) << IntPoint(-945,-1019) << IntPoint(1045,-1071) ;
Clipper c;
c.AddPath(poly,ptSubject,true);
c.AddPath(sub,ptClip,true);
c.Execute(ctIntersection,soln,pftNonZero, pftNonZero);
std::cout << soln.size() << "soln size";
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溶液尺寸为零。