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Hi
Can you change kernel for Vertex_base_for_ssr class as
Exact_predicates_inexact_constructions_kernel ?
I donot anything wrong in code it should work try
to match similar kernel .
----- Original Message -----
From:
To:
Sent: Monday, March 23, 2009 10:13
AM
Subject: Re: [cgal-discuss]
incident_facets function of a Delaunay triangulation
Hi, Sorry that I have sent an empty reply before because
I have hot the wrong button.
The line that I got the exception is
the line
Dt.incident_facets(start, back_inserter(f));
and
after I have chnaged the vector to a list, the exception still
occur..
Thanks
--- 2009年3月23日 星期一，Query Cgal <>
寫道﹕
寄件人:
Query Cgal <>
主題:
Re: [cgal-discuss] incident_facets function of a Delaunay
triangulation
收件人:
日期: 2009 3 23
星期一 上午 4:41
--- 2009年3月23日 星期一，naresh
<alexdowson@hotmail..com> 寫道﹕
寄件人:
naresh <>
主題: Re:
[cgal-discuss] incident_facets function of a Delaunay
triangulation
收件人:
日期:
2009 3 23 星期一 上午 4:33
Hi
in Which line you are getting
System.NullReferenceException of
code ?
Hmmm... You can try this instead
of this
vector<Delaunay_triangulation::Facet> f; with
list<Delaunay_triangulation::Facet> f;
try list instead of
vector.
-----
Original Message -----
Sent:
Monday, March 23, 2009 9:47 AM
Subject:
Re: [cgal-discuss] incident_facets function of a Delaunay
triangulation
Hi.
Thank you for your
reply.
Finally, I have tried with the following
code to use the incident_facets function.
int
main(array<System::String ^>
^args)
{
Delaunay_triangulation Dt;
Dt.insert(Point(0,0,0));
Dt.insert(Point(10,0,0));
Dt.insert(Point(5,10,0));
Dt.insert(Point(8,8,0));
Dt..insert(Point(-3, -20, 0));
Dt.insert(Point(-5,10,0));
Finite_vertices_iterator start =
Dt.finite_vertices_begin();
vector<Delaunay_triangulation::Facet>
f;
Dt.incident_facets(start,
back_inserter(f));
}
However, when it
has "System.NullReferenceException'
May I ask is it
due to the nature of the points that I have inserted
into the triangulation?
I am using CGAL-3.3.1
and Visual C++ 2005
And I am using the
triangulation with the following declaration.
Thank
you very much for your help.
typedef
CGAL::Cartesian<double> Rep_class;
typedef
CGAL::Vector_3<Rep_class> Vector;
typedef
CGAL::Point_3<Rep_class> Point_3;
typedef
CGAL::Object CGAL_object;
template <
class GT, class Vb =
CGAL::Triangulation_vertex_base_3<GT>
>
class Vertex_base_for_ssr
: public
Vb
{
public:
typedef typename
Vb::Vertex_handle Vertex_handle;
typedef typename Vb::Cell_handle
Cell_handle;
typedef typename
Vb::Point
Point;
template < class TDS2
>
struct Rebind_TDS
{
typedef typename Vb::template
Rebind_TDS<TDS2>::Other
Vb2;
typedef
Vertex_base_for_ssr<GT,
Vb2>
Other;
};
Vector
surface_normal;
vector<Vertex_base_for_ssr<GT, Vb> *>
neighbor_vertex_handle;
double
fifth_nearest_dist;
int
surface_label;
bool
is_safe;
Vertex_base_for_ssr() :
Vb()
{
surface_label = -1;
is_safe = false;
}
Vertex_base_for_ssr(const Point&
p)
: Vb(p)
{
coordinate[0] =
p.x();
coordinate[1]
= p.y();
coordinate[2] =
p.z();
surface_label
= -1;
is_safe =
false;
}
Vertex_base_for_ssr(const Point& p, Cell_handle
c)
: Vb(p, c)
{
surface_label =
-1;
is_safe =
false;
}
void
set_surface_normal(double x_i, double y_i, double
z_i)
{
surface_normal = Vector(x_i, y_i, z_i);
}
Vector get_surface_normal()
{
return
surface_normal;
}
Point
get_point()
{
return
Vb::point();
}
double
coordinate[3];
void
set_coordiante()
{
coordinate[0] =
point().x();
coordinate[1]
= point().y();
coordinate[2] = point().z();
}
};
typedef
CGAL::Exact_predicates_inexact_constructions_kernel
K;
typedef
CGAL::Triangulation_data_structure_3<Vertex_base_for_ssr<K>
> Tds;
typedef
CGAL::Delaunay_triangulation_3<K, Tds>
Delaunay_triangulation;
---
2009年3月21日 星期六，naresh <>
寫道﹕
寄件人: naresh
<>
主題: Re: [cgal-discuss] incident_facets function of a
Delaunay triangulation
收件人:
日期: 2009 3 21 星期六 下午 1:47
Hi
>>In fact, I am dealing
with a 3D triangulation (sorry that I forgot to
mention that it is 3D in the >>previous
post.)
>>and therefore, I
cannot use Facet since Facet is not represented in 3D
triangulation.
>>So, what
should I do to use incident_facets() of a 3D
triangulation.
I donot know which
triangulation are you using. for simple triangulation
here there you can define Facet easily . here is
code..
try to modifiy with ur
code
typedef
CGAL::Exact_predicates_inexact_constructions_kernel
K;
typedef
CGAL::Triangulation_3<K>
Triangulation;
typedef
Triangulation::Facet Facet;
If there is still confusion post some code . But i
will not able reply today because saturday now and i
am off. :) I can reply on
monday.
Hope this
helps
Alex
----- Original Message
-----
From: Query
Cgal
To:
Sent: Saturday, March 21, 2009 6:46
PM
Subject: Re: [cgal-discuss] incident_facets function
of a Delaunay
triangulation
THank you for your
reply.
In fact, I am dealing with a 3D triangulation (sorry
that I forgot to mention that it is 3D in the previous
post.)
and therefore, I cannot use Facet since Facet is not
represented in 3D
triangulation.
So, what should I do to use incident_facets() of a 3D
triangulation.
Thank
you
--- 2009年3月21日 星期六，naresh
<>
寫道﹕
寄件人: naresh
<>
主題: Re: [cgal-discuss] incident_facets function of a
Delaunay
triangulation
收件人:
日期: 2009 3 21 星期六 下午
1:07
Hi
I think you should try like
this
typedef Trianluation_2::Facet Facet; //
something here that you had used in ur programme may
different i had showed only
example
vector<Facet>
f;
Dt.incident_facets(start,
back_inserter(f));
----- Original Message
-----
From: Query
Cgal
To:
Sent: Saturday, March 21, 2009 5:45
PM
Subject: [cgal-discuss] incident_facets function of a
Delaunay
triangulation
Hi, I have tried to use the function
below
template <class
OutputIterator>
OutputIterator t.incident_facets (
Vertex_handle v, OutputIterator
facets)
Copies all Facets incident to v to
the output iterator facets. Returns the resulting
output
iterator.
Precondition: t..dimension()
>1 , v Vertex_handle(),
t.is_vertex(v)..
When I tried to used it in the following way but it
didn't
work,
vector<Finite_facets_iterator>
f;
Dt.incident_facets(start,
back_inserter(f));
May I ask in what other way should I use the Output
iterator then
?
Thank
you
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