CGAL users discussion list

[Sebastien Loriot <>]

It is possible but requires an extended Kernel.

Note that there exists an alternative implementation (more modern and 
faster) in the Polygon Mesh Processing package

See the clip function:

https://doc.cgal.org/latest/Polygon_mesh_processing/group__PMP__corefinement__grp.html#ga5bf228a516a46f6d1c80937067a17f7e

Best,

Sebastien.

On 10/7/21 4:50 PM, "" ( via cgal-discuss 
Mailing List) wrote:
> now exploring Nef polyhedra boolean capabilities.
> As far as i understand Nef polyhedra can represent open half spaces.
> Hoping that i could obtain a result in boolean subtract operation 
> between a single face and a volume
> i modified the sample code supplied in the manual in various ways.
> Last one was as below where   fill_cube_1 represents a single face and 
> fill_cube_2 represent the piercing cube
> . The result is empty.
>
> Is this a possible operation with nef ?
> Best regards
> JPH
>
> voidfill_cube_1(Polyhedron& poly)
> {// single plane
> std::string input =
> "OFF\n\
> 4 1 0\n\
> -1 -1 0\n\
> -1 1 0\n\
> 1 1 0\n\
> 1 -1 0\n\
> 4  0 1 2 3";
> std::stringstreamss;
>    ss << input;
>    ss >> poly;
> }
> voidfill_cube_2(Polyhedron& poly)
> {
> std::string input =
> "OFF\n\
> 8 12 0\n\
> -0.5 -0.5 -0.5\n\
> -0.5 0.5 -0.5\n\
> 0.5 0.5 -0.5\n\
> 0.5 -0.5 -0.5\n\
> -0.5 -0.5 0.5\n\
> -0.5 0.5 0.5\n\
> 0.5 0.5 0.5\n\
> 0.5 -0.5 0.5\n\
> 3  0 1 3\n\
> 3  3 1 2\n\
> 3  0 4 1\n\
> 3  1 4 5\n\
> 3  3 2 7\n\
> 3  7 2 6\n\
> 3  4 0 3\n\
> 3  7 4 3\n\
> 3  6 4 7\n\
> 3  6 5 4\n\
> 3  1 5 6\n\
> 3  2 1 6";
> std::stringstreamss;
>      ss << input;
>      ss >> poly;
>    }
>
>
>
> --
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