CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

The Lindstrom_Turk placement is using a square root so it does not compile.
I think you can try the midpoint placement which should not have the 
problem. If you really want to use the default placement, here is a hack:


--- 
a/CGAL/Surface_mesh_simplification/Policies/Edge_collapse/Detail/Lindstrom_Turk_core_impl.h
+++ 
b/CGAL/Surface_mesh_simplification/Policies/Edge_collapse/Detail/Lindstrom_Turk_core_impl.h
@@ -419,7 +419,7 @@ void 
LindstromTurkCore<ECM,K>::Add_constraint_if_alpha_compatible( Vector const&

   if ( is_finite(slai) )
   {
-    FT l = CGAL_NTS sqrt( slai ) ;
+    FT l = CGAL_NTS sqrt( to_double(slai) ) ;



Note that I do not recommend to use this algorithm using this kernel.

Sebastien.


On 01/14/2014 11:31 AM, tang wrote:
> Dear all,
>
> I am trying to do some modification to the example code:
> http://doc.cgal.org/latest/Surface_mesh_simplification/Surface_mesh_simplification_2edge_collapse_constrained_polyhedron_8cpp-example.html
>
> I try to change the Kernel from
> CGAL::Simple_cartesian<double>
> to
> CGAL::Exact_predicates_exact_constructions_kernel
>
> As a result, I have the following modification in the example code:
> 1) line 4, changed
> #include <CGAL/Simple_cartesian.h>
> to
> #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
>
> 2) line 20, changed
> typedef CGAL::Simple_cartesian<double> Kernel;
> to
> typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
>
> However, after modification, the following errors displayed:
> error C2440: 'initializing' : cannot convert from
> 'CGAL::Null_functor::result_type' to 'CGAL::Lazy_exact_nt<ET_>'
>
>
> Could anyone tell me how to modify the code to let it pass the compling and
> building?
>
> Thanks
>
>
>
>
> --
> View this message in context: 
> http://cgal-discuss.949826.n4.nabble.com/Error-in-compiling-example-code-after-some-modification-tp4658641.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.