CGAL users discussion list

[Andreas Fabri <>]

Hello,

A Facet is a std::pair<Cell_handle, int> and this is documented
in the 3D Triangulation.  The int is the index of the facet and
it is opposite to the vertex with this index.

andreas

朱超 wrote:
> I know these functions,and I ues function *.get_alpha_shape_facets() to 
> find some kinds of faces,and store them in std:list(Facet).But I do not 
> know the class Facet,so you can tell me how to output vertices of 
> facets by iterior of std:list??
> 
>     ----- Original Message -----
>     *From:* Mariette Yvinec 
> <mailto:>
>     *To:* 
> 
>     
> <mailto:>
>     *Sent:* Tuesday, October 16, 2007 9:26 PM
>     *Subject:* Re: [cgal-discuss] facets
> 
>     look at the page
>     
> http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Alpha_shapes_3_ref/Class_Alpha_shape_3.html
>     of the doc :
>     yu have the classify member fuctions to know the status of a face
>     and the get_alpha_shape_xxxx functions to retrieve the alpa-shape faces
>     by types ans status
> 
> 
> 
>     朱超 wrote:
>>            I am from China,and Now use CGAL to compute some
>>     algorithms,but I have a problem, 
>>            now I use the algorithm of 3D alpha-shape,and want to
>>     output some information about    
>>     regular,interior,exterior,singular faces,but cgal does not provide
>>     the class explicitly,could you show me a example? how to do this?
>>     if you did not know ,could you tell me who can help me?
>>      
>>            best wish            
>>      
>>                                                                           
>>     chao zhu 
> 
>     -- 
>     Mariette Yvinec
>     Geometrica project team
>     INRIA  Sophia-Antipolis  
> 
>