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[Le Liu <>]

Hello,

I'm pretty new to CGAL.

Here is my test code:

        Nef_polyhedron::Point p0(0, 0, 10);

        Nef_polyhedron::Point p1(0, 10, 10);

        Nef_polyhedron::Point p2(10, 10, 10);

        Nef_polyhedron::Point p3(10, 0, 10);

        Nef_polyhedron::Point rect[5] = {p0, p1, p2, p3};

        Nef_polyhedron N2(rect, rect + 4, Nef_polyhedron::INCLUDED);

        cout << N2 << endl;

The output is 

----------------------------

Nef_polyhedron_2<Filtered_extended_homogeneous>

Plane_map_2

vertices 8

halfedges 16

faces 3

0 { 0 3, 0, -1 0 -1 0 1}

1 { 0 5, 0, -1 0 1 0 1}

2 { 0 9, 1, 0 0 0 0 10}

3 { 0 11, 1, 0 0 0 10 10}

4 { 0 13, 1, 0 10 0 0 10}

5 { 0 10, 1, 0 10 0 10 10}

6 { 0 15, 0, 1 0 -1 0 1}

7 { 0 4, 0, 1 0 1 0 1}

0 { 1, 3, 4, 1, 0, 0 }

1 { 0, 5, 2, 0, 1, 0 }

2 { 3, 1, 14, 6, 1, 0 }

3 { 2, 15, 0, 0, 0, 0 }

4 { 5, 0, 15, 7, 0, 0 }

5 { 4, 14, 1, 1, 1, 0 }

6 { 7, 9, 10, 3, 1, 1 }

7 { 6, 11, 8, 2, 2, 1 }

8 { 9, 7, 12, 4, 2, 1 }

9 { 8, 13, 6, 2, 1, 1 }

10 { 11, 6, 13, 5, 1, 1 }

11 { 10, 12, 7, 3, 2, 1 }

12 { 13, 8, 11, 5, 2, 1 }

13 { 12, 10, 9, 4, 1, 1 }

14 { 15, 2, 5, 7, 1, 0 }

15 { 14, 4, 3, 6, 0, 0 }

0 { -1, 0 , , 0 }

1 { 1, 6 , , 1 }

2 { 7, , , 0 }

----------------------------------------

My question is how to interpret this output.

I read the manual of 2D Boolean Operations on Nef Polygons, but I did not find any explanation about this.

Thank you.

Best,

Le