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[杨宝容 <>]

okay, i see. And I have figure out what the problem is. Thank you.

Best,

Monica


> -----原始邮件-----
> 发件人: "Andreas Fabri" 
> <>
> 发送时间: 2014-10-14 17:05:54 (星期二)
> 收件人: 
> 
> 抄送: 
> 主题: Re: [cgal-discuss] Mesh_3: Problem with isolated vertices
> 
> Hello,
> 
> it makes no sense to post no the CGAL list non-CGAL-related questions.
> or have you red James Joyce yet?
> 
> Andreas
> 
> 
> On 14/10/2014 10:59, 杨宝容 wrote:
> > Hi, everyone. Is there any one who has ever used the OpenCSG library, i
> > have some problems like this compiling:
> >
> > displaylistPrimitive.obj : error LNK2019: unresolved external symbol
> > "public: __thiscall OpenCSG::Primitive::Primitive(enum
> > OpenCSG::Operation,unsigned int)"
> > (??0Primitive@OpenCSG@@QAE@W4Operation@1@I@Z) referenced in function
> > "public: __thiscall
> > OpenCSG::DisplayListPrimitive::DisplayListPrimitive(unsigned int,enum
> > OpenCSG::Operation,unsigned int)"
> > (??0DisplayListPrimitive@OpenCSG@@QAE@IW4Operation@1@I@Z)
> >
> > displaylistPrimitive.obj : error LNK2019: unresolved external symbol
> > "public: virtual __thiscall OpenCSG::Primitive::~Primitive(void)"
> > (??1Primitive@OpenCSG@@UAE@XZ) referenced in function "public: virtual
> > __thiscall OpenCSG::DisplayListPrimitive::~DisplayListPrimitive(void)"
> > (??1DisplayListPrimitive@OpenCSG@@UAE@XZ)
> >
> > i have tried to change the project properties but it still doesn't work,
> > can you tell me why and how to fix it? thank you!
> >
> > Monica
> >
> >     -----原始邮件-----
> >     *发件人:* "Jane Tournois" 
> > <>
> >     *发送时间:* 2014-10-14 15:55:33 (星期二)
> >     *收件人:* 
> > 
> >     *抄送:*
> >     *主题:* Re: [cgal-discuss] Mesh_3: Problem with isolated vertices
> >
> >     Hi Benjamin,
> >
> >     Le 13/10/2014 20:01, Benjamin Kehlet a écrit :
> >>     Hi Jane
> >>
> >>     2014-10-13 17:25 GMT+02:00 Jane 
> >> Tournois<>:
> >>>     Hi Benjamin,
> >>>
> >>>     you are not doing anything wrong.
> >>>
> >>>     As you have noticed, the mesh itself is the C3T3
> >>>     (Complex_3_in_triangulation_3).
> >>>     The C3T3 is a subset of the triangulation.
> >>>     So, there can be cells, and vertices, that belong to the 
> >>> triangulation, but
> >>>     not to the C3T3.
> >>>
> >>>     In your particular example, the criteria that you are using to 
> >>> generate the
> >>>     mesh are a bit too weak. One symptom of that is that the surface is 
> >>> not very
> >>>     well fitted by the mesh. You can see it if you output the mesh to 
> >>> Medit for
> >>>     example.
> >>>
> >>>     About isolated vertices, it's the same as for cells. It is not 
> >>> forbidden to
> >>>     have one or several vertices that belong to the triangulation but 
> >>> not to the
> >>>     triangulation.
> >>>     It can be the case for example when a vertex is first inserted on 
> >>> the
> >>>     boundary (let's say during the initialization step), but then the 
> >>> refinement
> >>>     process changes the connectivity around it, and the vertex can 
> >>> start not to
> >>>     belong to the boundary anymore.
> >>     Ah! I didn't know that could happen.
> >>
> >>>     To make it short :
> >>>     - it is not a bug
> >>>     - the object that are interested in at the end/during the mesh 
> >>> generation
> >>>     process is the C3T3
> >>     Thanks a lot for the explanation, Jane! That was very enlightening.
> >>
> >>     So just to be sure: It is then my responsibility to grab only the
> >>     relevant vertices from the triangulation, right? (Since the C3T3 does
> >>     not provide an iterator over the vertices that belong to the 
> >> complex.)
> >     Yes, you are right.
> >
> >     You can iterate on cells, using the Cells_in_complex_iterator
> >     (see
> >     
> > http://doc.cgal.org/latest/Mesh_3/classMeshComplex__3InTriangulation__3.html
> >     )
> >     and then collect the vertices.
> >
> >     The iterator on vertices that you can use on a C3T3 is
> >     Vertices_in_complex_iterator
> >     
> > <http://doc.cgal.org/latest/Mesh_3/classMeshComplexWithFeatures__3InTriangulation__3.html#a000d7e82e052dc9231c30e781eff4004>
> >     (see
> >     
> > http://doc.cgal.org/latest/Mesh_3/classMeshComplexWithFeatures__3InTriangulation__3.html
> >     )
> >     but it iterates only on the corners of the object.
> >
> >     Regards,
> >     Jane.
> >
> >>     Regards
> >>
> >>     Benjamin
> >>
> >>>     Best regards,
> >>>
> >>>     Jane.
> >>>
> >>>
> >>>     --
> >>>     Jane Tournois, PhD
> >>>     R&D Engineer at GeometryFactory
> >>>     http://www.geometryfactory.com/
> >>>
> >>>
> >>>
> >>>     Le 13/10/2014 10:41, Benjamin Kehlet a écrit :
> >>>
> >>>>     2014-10-13 9:55 GMT+02:00 Clément 
> >>>> Jamin<>:
> >>>>>     Hi Benjamin,
> >>>>>
> >>>>>     Do you use the *parallel* mesh algorithm that is available in 
> >>>>> CGAL 4.5
> >>>>>     (with CGAL::Parallel_tag)?
> >>>>     Hello Clément!
> >>>>
> >>>>     No, this is in serial.
> >>>>
> >>>>     Regards
> >>>>
> >>>>     Benjamin
> >>>>
> >>>>>     Best,
> >>>>>     Clément.
> >>>>>
> >>>>>
> >>>>>     On Mon, Oct 13, 2014 at 12:44 AM, Benjamin 
> >>>>> Kehlet<>
> >>>>>     wrote:
> >>>>>>     Hello CGAL community!
> >>>>>>
> >>>>>>     When meshing polyhedral domains, I sometimes experience isolated
> >>>>>>     vertices, ie. vertices which does not belong to any cell. The 
> >>>>>> attached
> >>>>>>     file demonstrates the problem. Could someone take a look, and 
> >>>>>> check if
> >>>>>>     I'm doing anything wrong? The code for reading out the mesh is 
> >>>>>> based
> >>>>>>     on the code in CGAL for exporting to medit's file format.
> >>>>>>
> >>>>>>     I get this result when attempting to mesh the file
> >>>>>>     demo/Polyhedron/data/rotor.off from CGAL's source tree:
> >>>>>>
> >>>>>>     benjamik@benjamik-ThinkPad:~/tmp/cgal-meshing/build$ ./main
> >>>>>>     ~/software/CGAL-4.5/demo/Polyhedron/data/rotor.off
> >>>>>>
> >>>>>>     [...]
> >>>>>>
> >>>>>>     Number of unconnected vertices:14
> >>>>>>     0.0693619 0.340288 -0.260398 0
> >>>>>>     0.148692 0.344385 -0.252795 0
> >>>>>>     0.11059 0.332426 -0.267569 0
> >>>>>>     0.0800736 0.308173 -0.290017 0
> >>>>>>     0.0358875 0.312982 -0.283919 0
> >>>>>>     0.0739249 0.2902 -0.306196 0
> >>>>>>     0.100469 0.304801 -0.293518 0
> >>>>>>     0.0949104 0.318775 -0.276573 0
> >>>>>>     0.0777684 0.350724 -0.248457 0
> >>>>>>     0.0909964 0.338994 -0.261008 0
> >>>>>>     0.0263695 0.298269 -0.299189 0
> >>>>>>     0.00269295 0.307881 -0.290388 0
> >>>>>>     0.0496229 0.300013 -0.297675 0
> >>>>>>     -0.0248875 0.311644 -0.285615 0
> >>>>>>
> >>>>>>     Also a few other files (at least cow.off and bones.off and maybe
> >>>>>>     others) in the same directory reproduces the problem.
> >>>>>>
> >>>>>>     Best regards
> >>>>>>
> >>>>>>     Benjamin Kehlet
> >>>>>>
> >>>>>>     --
> >>>>>>     You are currently subscribed to cgal-discuss.
> >>>>>>     To unsubscribe or access the archives, go to
> >>>>>>     https://sympa.inria.fr/sympa/info/cgal-discuss
> >>>>>>
> >>>>>>
> >>>>>     --
> >>>>>     You are currently subscribed to cgal-discuss.
> >>>>>     To unsubscribe or access the archives, go to
> >>>>>     https://sympa.inria.fr/sympa/info/cgal-discuss
> >>>>>
> >>>>>
> >>>     --
> >>>     You are currently subscribed to cgal-discuss.
> >>>     To unsubscribe or access the archives, go to
> >>>     https://sympa.inria.fr/sympa/info/cgal-discuss
> >>>
> >>>
> >
> >
> >     --
> >     Jane Tournois, PhD
> >     R&D Engineer at GeometryFactory
> >     http://www.geometryfactory.com/
> >
> 
> -- 
> Andreas Fabri, PhD
> Chief Officer, GeometryFactory
> Editor, The CGAL Project
> 
> phone: +33.492.954.912    skype: andreas.fabri
> 
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