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[Iasonm <>]

I am trying to compute the one ring area around every vertex of a triangular
mesh. Below is the code that I used. 

CGALSurfaceMesh::Vertex_range vr = Mesh.vertices();
  for (auto vit = vr.begin(); vit != vr.end(); vit++) {
    CGALSurfaceMesh::Face_around_target_range oneRingRange =
        Mesh.faces_around_target(Mesh.halfedge(*vit));
    std::cout << "Area around vertex " << *vit << " is:"
              << CGAL::Polygon_mesh_processing::area(oneRingRange, Mesh)
              << std::endl;
  }

When CGAL::Polygon_mesh_processing::area(oneRingRange, Mesh) is executed i
get an error telling me:
/usr/local/include/CGAL/Polygon_mesh_processing/measure.h:314: error: call
to function 'exact' that is neither visible in the template definition nor
found by argument-dependent lookup
      exact(result);
      ^
Why is this happening?




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