CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 05/13/2015 12:35 AM, Vinicius Azevedo wrote:
> Hi Sebastien,
>
> Is it to hard to insert these ordered edges slices on the original
> Polyehdron mesh?

The implementation is simple but in order to add the handling of the
update of the polyhedron you would need some care to handle the case
where the plane goes through a vertex.

Sebastien.

> Vinicius C. Azevedo.
>
> On Tue, May 12, 2015 at 11:17 AM, Vinicius Azevedo
> <
>  
> <mailto:>>
>  wrote:
>
>     That did the trick, thanks!
>
>     Vinicius C. Azevedo.
>
>     On Tue, May 12, 2015 at 10:41 AM, Sebastien Loriot (GeometryFactory)
>     
> <
>  
> <mailto:>>
>  wrote:
>
>         On 05/12/2015 04:34 PM, Vinicius Azevedo wrote:
>
>             I was testing the code and the split_graph_into_polylines
>             function
>             called on Polyhedron_mesh_slicer_3.h needs three parameters
>             instead of
>             the two passed. I tried to use the IsTerminalDefault, but it
>             didn't work.
>
>
>         IIRC, this file was already shipped with CGAL and you need to
>         use the
>         version provided in the tgz. At the cmake level you should have
>         someting like INCLUDE_DIRECTORIES(BEFORE PATH_TO_THE_TGZ)
>
>         Sebastien.
>
>
>
>             Vinicius C. Azevedo.
>
>             On Tue, May 12, 2015 at 9:45 AM, Vinicius Azevedo
>             
> <
>             
> <mailto:>
>             
> <mailto:
>             
> <mailto:>>>
>  wrote:
>
>                  Thanks Sebastien, that helps a lot.
>
>                  Is there any quick way to add these edge rings into the
>             polyhedron mesh?
>
>
>
>                  Vinicius C. Azevedo.
>
>                  On Tue, May 12, 2015 at 2:23 AM, Sebastien Loriot
>             (GeometryFactory)
>                  
> <
>  
> <mailto:>
>             
> <mailto:
>  
> <mailto:>>>
>             wrote:
>
>                      On 05/11/2015 05:56 PM, Vinicius Azevedo wrote:
>
>                          Hi,
>
>                          I was trying to compute the line formed by the
>             intersection
>                          between a
>                          plane and a mesh. I've tried to follow the same
>             approach as
>                          used on
>                          Polyhedron_cut_demo_plugin, but my segments are not
>                          completely on
>                          counterclockwise orientation. Any ideas?
>
>                          Application screenshots:
>                          The cutting plane and the object:
>             
> https://dl.dropboxusercontent.com/u/5919734/bunnyUnorderedSegments.png
>                          The resulting line formed:
>             
> https://dl.dropboxusercontent.com/u/5919734/bunnyUnorderedSegments2.png
>
>                          I'm using a similar code to
>             Polyhedron_cut_demo_plugin:
>
>                          for (auto it = intersections.begin(), end =
>                          intersections.end(); it !=
>                          end; ++it) {
>                          Segment *pCurrSegment =
>                          boost::get<Segment>(&(it->value().first));
>                          if (pCurrSegment) {
>                                   points.push_back(pCurrSegment->source());
>                          }
>                          }
>
>                          Thanks!
>                          Vinicius C. Azevedo.
>
>
>                      Here is some code that is computing the
>             intersection of a
>                      triangle mesh with a plane. The code is currently
>             under review
>                      for integration into CGAL.
>
>                      HTH
>
>                      Sebastien.
>
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