CGAL users discussion list

[Andreas Fabri <>]

Hi Amir,

Isn't the most important question, what do you want to achieve by orderng 
them?

Take the vector which has the same direction as the normal.
That orders them also in the case they have the same normal.

Is the question if they can be ordered based on the a,b,c,d
without computing new entities ?

andreas

Amir Vaxman wrote:
> Yes, but then you have to normalize.. (there is no Direction_3 total 
> order like in Direction_2).
>
>  
>
> *From:*  [mailto:] *On 
> Behalf Of *Ophir Setter
> *Sent:* Wednesday, March 18, 2009 1:34 PM
> *To:* 
>
> *Subject:* Re: [cgal-discuss] Sorting Planes Lexicographically
>
>  
>
> I am guessing that you could sort the normals to the planes 
> (lexicographically).
>
> On Mon, Mar 16, 2009 at 3:01 PM, Amir Vaxman < 
> <mailto:>> wrote:
>
> Hello,
>
>  
>
> Is there a way to sort planes lexicographically in CGAL, in a similar 
> manner as points are sorted? Of course, I am looking for something 
> invariant of plane parameterization.
>
>  
>
> Amir.
>
>