CGAL 2D三角剖分：仅获取内部三角形

Question

I am using CGAL 4.13 to do some 2D triangulation of an outline. In my case some random data originally read from GeoJSON:

The triangulation is done exactly like mentioned in the CGAL user manual: https://doc.cgal.org/latest/Mesh_2/index.html#title14

But when I fetch the triangles out of the Mesher (via mesher.triangulation() ), is do not only get the inner triangles but also some "outer" triangles:

Is there a way to get only the triangles matching to the outlines? Like this:

Answer 1

三角剖分的面部类型具有成员函数is_in_domain()