CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Something like the following (not tested) should be working:

typedef std::pair<Point,Info> Pair;
std::vector< Pair > points_and_info;

std::vector< Pair >::iterator it =
  CGAL::remove_outliers(points_and_info.begin(),
                        points_and_info.end(),
                        CGAL::First_of_pair_property_map<Pair>(),
                        nb_neighbors,
                        removed_percentage);

// to remove points
points_and_info.resize(std::distance(points_and_info.begin(),it));


HTH,

Sebastien.

On 06/21/2016 02:21 AM, shan23 wrote:
> Hi,
>
> I'm trying to use Point Set Processing package to pre-process a set of 2D
> points, which have a property (weight) associated with them. Specifically,
> I'd like to remove outliers from the input point set using the
> *CGAL::remove_outliers* function.
>
> What I can't figure out, is how to "tag" each point with its associated
> weight, so after the outliers are removed, the remaining points have their
> original weights associated with them. To be clear, I (currently) am not
> looking to influence the removal of outliers using the weights of the points
> - what I want is to ensure that the points output by *CGAL::remove_outliers*
> have their original weights associated with them.
>
> I'm guessing I'd have to use a property map to specify that the input is a
> pair of type <Point_2, size_t>, but to do so, it appears to me that I'd have
> to use the following property maps : *CGAL::First_of_pair_property_map* and
> *CGAL::Second_of_pair_property_map*. But the function
> *CGAL::remove_outliers* takes only a property map which is "is a model of
> ReadablePropertyMap with value type Point_3<Kernel>."  I looked in the
> source code (include/CGAL/remove_outliers.h), where the only use of the
> property map is to "get" the vertex, and not any associated property as
> well.
>
> I'm not well-versed in the use of property maps - is what I'm trying to do
> (which doesn't seem very unreasonable to me, as points often may have
> associated properties) possible using the existing API of
> *CGAL::remove_outliers*? If its possible, could you please give an example?
>
> Please let me know if additional details are needed!
>
>
>
> --
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