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- From: "Thomas Zangl - Home" <>
- To: <>
- Subject: Regular_Triangulation_3: dual of an edge
- Date: Wed, 15 Aug 2007 16:32:06 +0200
Hi!
Given a RegularTriangulation3 and a number of edges of this
triangulation. For each of these given edges I try to compute its dual
plane (facet). The plane is formed by the set of vertices which are the
dual of each regular triangulation cell, the edge is part of.
I use some code like this:
(vh1, vh2 are vertex handles of an edge, t = RegularTriangultion3)
Rt_Cell_handle c;
int i, j;
assert(t.is_edge(vh1, vh2, c,i,j));
Rt_Cell_circulator cCirc = t.incident_cells(c, i, j);
Rt_Cell_circulator cCircEnd = cCirc;
PointContainer pDual;
do {
if (!(t.is_infinite(cCirc))) {
Point p = t.dual(cCirc);
pDual.push_back(p);
}
} while(cCirc++!=cCircEnd);
if (pDual.size() == 1 ) {
cout << "hasIntersectionWithPD: got only one point." << endl;
return false;
} else if (pDual.size() == 2) {
cout << "hasIntersectionWithPD: got only one segment." << endl;
return false;
} else if (pDual.size() == 0) {
cout << "hasIntersectionWithPD: Got no dual point? Argl....!" << endl;
return false;
}
I then happens that an edge has 0, 1 or 2 cells around it which
produce the same number of dual points.
Can that be true? I wonder because if an edge of a triangulation has 0
dual points, this means that the edge is only part of infinite
cells?
Best regards,
--
----------------------------------------------------------------
,yours Thomas Zangl, Bakk.rer.soc.oec. -
-
- Freelancer - IT Consulting & Software Development -
- Student of Software Development-Economy (Master) -
- Regular_Triangulation_3: dual of an edge, Thomas Zangl - Home, 08/15/2007
- Re: [cgal-discuss] Regular_Triangulation_3: dual of an edge, Andreas Fabri, 08/15/2007
- Re:[cgal-discuss] Regular_Triangulation_3: dual of an edge, Thomas Zangl - Home, 08/15/2007
- Re: [cgal-discuss] Regular_Triangulation_3: dual of an edge, Andreas Fabri, 08/15/2007
- Re:[cgal-discuss] Regular_Triangulation_3: dual of an edge, Thomas Zangl - Home, 08/15/2007
- Re: [cgal-discuss] Regular_Triangulation_3: dual of an edge, Andreas Fabri, 08/15/2007
- Re:[cgal-discuss] Regular_Triangulation_3: dual of an edge, Thomas Zangl - Home, 08/15/2007
- Re: [cgal-discuss] Regular_Triangulation_3: dual of an edge, Joshua A Levine, 08/15/2007
- Re:[cgal-discuss] Regular_Triangulation_3: dual of an edge, Thomas Zangl - Home, 08/15/2007
- Re: [cgal-discuss] Regular_Triangulation_3: dual of an edge, Andreas Fabri, 08/15/2007
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