draw_point_set_3 don't draw points with a coordinate == 0

[maximecharriere]

Issue Details

When I draw a PointSet3 with points that have a coordinate==0.0, the points are not drawn.

Source Code

psOK is drawn, but not psNG.

#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Point_set_3.h>
#include <CGAL/draw_point_set_3.h>

using Kernel    = typename CGAL::Exact_predicates_inexact_constructions_kernel;
using Point_3   = typename Kernel::Point_3;               
using Point_set_3 = typename CGAL::Point_set_3<Point_3> ;

int main()
{
  Point_set_3 psOK, psNG;

  for(size_t i = 0; i < 4; i++)
  {
    psOK.insert(Point_3(0.1, 2 * i, i * i));
    psNG.insert(Point_3(0.0, 2 * i, i * i));
  }

  CGAL::draw(psOK);
  CGAL::draw(psNG);
}

Environment

• Operating system (Windows/Mac/Linux, 32/64 bits): Windows 64bits
• Compiler: MSVC
• Release or debug mode: Release
• Specific flags used (if any):
• CGAL version: 5.4 (commit 98408f4)
• Boost version: 1.74.0
• Other libraries versions if used (Eigen, TBB, etc.):

[maximecharriere]

okay, if I add one point that have a coordinate != 0.0, it's working

int main()
{
  Point_set_3 psOK, psNG;

  for(size_t i = 0; i < 4; i++)
  {
    psOK.insert(Point_3(0.1, 2 * i, i * i));
    psNG.insert(Point_3(0.0, 2 * i, i * i));
  }
  psNG.insert(Point_3(0.1, 1.0, 2.0)); // New point with x != 0.0

  CGAL::draw(psOK);
  CGAL::draw(psNG);
}

[gdamiand]

I tested your code: points are drawn, but qglviewer use a wrong reference.
Double clicking in the window with the middle button (will do a Shows entire scene) shows all the points.

We do a " this->showEntireScene();" in the basic viewer init method; thus there is probably nothing more possible to do from our side. This is maybe a bug in qglviewer ? I observed some strange behaviours sometimes...

[maximecharriere]

That's right, the points are outside the field of vision. My bad.

[sloriot]

IMO, this should be left open as it is a real issue (we are maintaining a fork of libqlviewer).