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["Jingyi Jin" <>]

hi Alexandre,

 

Doesn't the halfedge also provide the method .target()? you can use the coordinates of .source() and .target() to build a Ray_2.

 

That is my thought,

 

Jingyi

 

On 5/30/07, < > wrote:

Hi,

I work on a circle covering project and I compute a Voronoi diagram with the Voronoi_diagram_2 class.
So I would like to compute the intersection between a Segment_2 object and an unbounded halfedge of my Voronoi diagram. To do that, I use the "intersection" function, it can work between a Ray_2 object and a Segment_2 object. So, an unbounded halfedge can be defined by a Ray_2 object (because e->is_ray() is true). That's why I would like to construct a Ray_2 object which is corresponding to my unbounded haledge.
I can use the method source() to have the source of the halfedge but I also need a direction --> Direction_2 (or another Point_2 on the halfedge, or a Vector_2 corresponding to the halfedge, or a Line_2) to construct my Ray_2. Can you give the name of a method to have this information (direction or another point or vector etc.)?
Thanks a lot.

Alexandre Marié (GERAD - HEC MONTRÉAL)


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