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Re: [cgal-discuss] Rectangular tube is capped on the surface when converting Nef_Polyhedron_3 to Polyhedron_3


Chronological Thread 
  • From: "Sebastien Loriot (GeometryFactory)" <>
  • To:
  • Subject: Re: [cgal-discuss] Rectangular tube is capped on the surface when converting Nef_Polyhedron_3 to Polyhedron_3
  • Date: Wed, 15 Nov 2017 16:12:10 +0100
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Your input is not valid, the "top" and "bottom" faces are not exactly coplanar. The error goes away if you triangulate the faces before
(using for example CGAL::Polygon_mesh_processing::triangulate_faces())..

Sebastien.

On 11/15/2017 03:13 PM, sdobashi wrote:
Dear Sebastien,

At least for the example trc1.off - trc2.off, the assertions bellow seem to
fail:

Nef_3\include\CGAL\Nef_3\polygon_mesh_to_nef_3.h

line 263, 264
CGAL_assertion(ss_circle.has_on(sp));
CGAL_assertion(ss_circle.has_on(sv_prev->point()));

line 294, 295, 296
CGAL_assertion(ss_plane.has_on(sv_prev->point()));
CGAL_assertion(ss_circle.has_on(sp_0));
CGAL_assertion(ss_circle.has_on(sv_prev->point()));


Nef_S2\include\CGAL\Nef_S2\Sphere_direction.h

line 105
CGAL_assertion(d1.has_on(p) && d2.has_on(p) && d3.has_on(p));


Nef_S2\include\CGAL\Nef_S2\Sphere_segment.h

line 61
CGAL_assertion(c.has_on(p1)&&c.has_on(p2));


In Release mode, the subtraction works fine for the truncated right cone
example.

thanks,

S Dobashi



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