CGAL users discussion list

[zhaojing <>]

Hi guys,

I'm new to CGAL and I'm trying to use the efficient ransac algorithm to
detect shapes in point cloud.
I'm using the demo code at 
https://doc.cgal.org/latest/Point_set_shape_detection_3/index.html#Point_set_shape_detection_3Usage_minimal.

Now for certain reason I need to use the
Exact_predicate_exact_constructions_kernel. 

I just changed the header file and the corresponding typedef at the
beginning of the program.  However the compiling process failed with the
following error message:

/usr/local/include/CGAL/Shape_detection_3/Efficient_RANSAC.h:495:34: error:
ambiguous overload for ‘operator*’ (operand types are
‘CGAL::Shape_detection_3::Efficient_RANSAC<CGAL::Shape_detection_3::Shape_detection_traits&lt;CGAL::Epeck,
std::vector&lt;std::pair&lt;CGAL::Point_3&lt;CGAL::Epeck>,
CGAL::Vector_3<CGAL::Epeck> > >,
CGAL::First_of_pair_property_map<std::pair&lt;CGAL::Point_3&lt;CGAL::Epeck>,
CGAL::Vector_3<CGAL::Epeck> > >,
CGAL::Second_of_pair_property_map<std::pair&lt;CGAL::Point_3&lt;CGAL::Epeck>,
CGAL::Vector_3<CGAL::Epeck> > > > >::FT {aka
CGAL::Lazy_exact_nt<CGAL::Gmpq>}’ and ‘std::size_t {aka long unsigned int}’)
           (std::size_t)((FT)0.01 * m_num_available_points) :
                        ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

The error message is too long to post all of them here. It is easy to
reproduce though. 

I really don't get it. Aren't the kernels expected to replace one another?

Thanks in advance!

Best,
Jing



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