CGAL users discussion list

[Pär Wrange <>]

Hm, I think that I missunderstood the documentation. LindstromTurk cost can't 
be used in such a way. Sorry for the bad posting. Forgot to answer my own 
question here.

 But anyway, I found a post here were a member instead used a function to 
stop the simplification when a specific cost was reached. Unfortunarely I'm 
not at my computer so I can't paste a link.

On 2 jul 2013, at 08:21, "Sebastien Loriot (GeometryFactory)" 
<>
 wrote:

> Could you please provide a minimal example showing the pb?
> 
> An potential pb I see in the line you  pasted:
> 
> ... CGAL::vertex_external_index, m_oPolyhedron3 ) ).edge_index_map ...
>                                                   ^
>                                      this '.' is suspicious.
> 
> 
> Sebastien.
> 
> On 06/30/2013 03:16 PM, pwr00 wrote:
>> Hi!
>> I am trying to do a polygon reduction with LindstromTurk cost but am unable
>> to compile the code. It looks like this:
>> 
>>    CGAL::Surface_mesh_simplification::LindstromTurk_cost<  Polyhedron3>
>> oStop;
>> 
>>    wlib::Int nNumRemovedEdges =
>> CGAL::Surface_mesh_simplification::edge_collapse(
>>          m_oPolyhedron3,
>>          oStop,
>>          CGAL::vertex_index_map( boost::get( CGAL::vertex_external_index,
>> m_oPolyhedron3 ) ).edge_index_map( boost::get( CGAL::edge_external_index,
>> m_oPolyhedron3 ) ) );
>> 
>> 
>> where m_oPolyhedron3 is
>> typedef CGAL::Simple_cartesian<  float>  Kernel;
>> typedef CGAL::Polyhedron_3<  Kernel>  Polyhedron3;
>> 
>> 
>> The compilation error that I get is:
>> 
>> Impl/CGALWrapperImpl.cpp:72:33: note: in instantiation of function template
>> specialization
>> 'CGAL::Surface_mesh_simplification::edge_collapse<CGAL::Polyhedron_3&lt;CGAL::Simple_cartesian&lt;float>,
>> CGAL::Polyhedron_items_3, HalfedgeDS_default, std::allocator<int>>,
>> CGAL::Surface_mesh_simplification::LindstromTurk_cost<CGAL::Polyhedron_3&lt;CGAL::Simple_cartesian&lt;float>,
>> CGAL::Polyhedron_items_3, HalfedgeDS_default, std::allocator<int>>>,
>> CGAL::Polyhedron_edge_index_map_external<CGAL::Simple_cartesian&lt;float>,
>> CGAL::Polyhedron_items_3, HalfedgeDS_default, std::allocator<int>>,
>> boost::edge_index_t,
>> CGAL::cgal_bgl_named_params<CGAL::Polyhedron_vertex_index_map_external&lt;CGAL::Simple_cartesian&lt;float>,
>> CGAL::Polyhedron_items_3, HalfedgeDS_default, std::allocator<int>>,
>> boost::vertex_index_t, boost::no_property>  >' requested here
>>    wlib::Int nNumRemovedEdges =
>> CGAL::Surface_mesh_simplification::edge_collapse(
>>                                 ^
>> /usr/local/include/CGAL/Surface_mesh_simplification/Policies/Edge_collapse/LindstromTurk_cost.h:49:15:
>> note: candidate function not viable: requires 2 arguments, but 4 were
>> provided
>>   result_type operator()( Profile const&  aProfile, optional<Point>  const&
>> aPlacement ) const
>>               ^
>> 9 warnings and 1 error generated.
>> make: ***
>> [../../../../build/intermediate-debug/CGALWrapper/Impl/CGALWrapperImpl.o]
>> Error 1
>> 
>> 
>> 
>> --
>> View this message in context: 
>> http://cgal-discuss.949826.n4.nabble.com/unable-to-compile-simplification-with-LinstromTurk-cost-tp4657735.html
>> Sent from the cgal-discuss mailing list archive at Nabble.com.
> 
> 
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