Is it possible to keep the index of input points in the output points for cySampleElimination?

[marlinilram]

Hi, thanks for the poisson disk sampling method, is it possible to keep the index of input points in the output points for cySampleElimination?

[cemyuksel]

It should be possible by using a custom class for PointType that also stores the point index, but I haven't tested this.

[alecjacobson]

Here's what I used (might be a better way):

namespace cy
{
  struct Point3f_id : public cy::Point3f
  {
    int i;
    Point3f_id( float v): cy::Point3f(v),i(-1){}
    Point3f_id(){}
    Point3f_id(const Point3f_id & that): cy::Point3f(that), i(that.i) {}
    Point3f_id(const Point3f & that): cy::Point3f(that), i(-1) {}
    Point3f_id operator-(Point3f_id const &that) const 
    {
      return cy::Point3f::operator-(that);
    };
  };
}

(sampler only seems to need the operator- and these constructors because the bounds are stored as the given type)