CGAL users discussion list

[Shriramana Sharma <>]

On Wed, Nov 7, 2012 at 6:25 PM, Efi Fogel 
<>
 wrote:
> There is no such thing as a CW oriented (valid) polygon.

If so, can you please explain this (see the points of Q in the second case):

$ ./do_intersect
P = [ 3 vertices: (-1 1) (0 -1) (1 1) ]
Q = [ 3 vertices: (-1 -1) (1 -1) (0 1) ]
The two polygons intersect in their interior.
$ ./do_intersect-alt
P = [ 3 vertices: (-1 1) (0 -1) (1 1) ]
Q = [ 3 vertices: (0 1) (1 -1) (-1 -1) ]
The two polygons intersect in their interior.

-- 
Shriramana Sharma