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[Zesen Qian <>]

Hi Sebastien,

Thank you for the comment. I actually encountered this problem as
well, and the method you suggested should solve it well. Only one
question remains, however: is there anyway to get a Surface_mesh from
c3t3 directly, besides calling export_surface_to_off() and then
reading it back?

Thank you.

Best,
Zesen

On Tue, Jun 12, 2018 at 6:44 AM, Sebastien Loriot (GeometryFactory)
<>
 wrote:
> We added some functions in PMP to handle this kind of issues.
> See CGAL::Polygon_mesh_processing::orient()
>
> https://doc.cgal.org/latest/Polygon_mesh_processing/group__PMP__orientation__grp.html#gafe035adcc4ff061b4438cc9dae591d00
>
> Sebastien.
>
> On 06/12/2018 11:31 AM, Raphael Grimm wrote:
>>
>> Hi,
>> i am meshing implicit surfaces and sometimes the result is inside out (the
>> vertex order of triangles is wrong).
>>
>> I attached three meshes and the code to show what i mean:
>>   *  'sphere_r_const_1_1.000000.off' is correct
>>   *  'sphere_r_const_2_1.000000.off' is inside out
>>   *  'sphere_r_const_4096_1.000000.off' is correct
>>
>> In both cases i meshed a unit sphere.
>> The only difference when creating the spheres is the squared radius i
>> passed to 'Sphere_3' when creating my 'CGAL::Implicit_mesh_domain_3'.
>> The first sphere got the exact squared radius '1' and the second the
>> larger value '2' and the third the value '4096'.
>> Hence i the issue can't be a too large bounding sphere.
>>
>> Why does this happen and how can i prevent this?
>>
>> Best regards,
>>
>> Raphael
>>
>
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