CGAL users discussion list

[Ben Supnik <>]

Hi Y'all,

I am using the bezier curve traits with the sweep algorithm to find 
intersections in closed bezier general polygons.

The manual for the bezier traits curve_2 says:

"The only resriction we have is that the curve does not contain any 
self-intersections."

The precondition for the constructor says:

"The input range must contain at least two control points, and the 
polyline defined by these points must not be self-intersecting."

But...from what I can tell:

- The sweep line at least works correctly even if either of these 
preconditions is violated.

- The code appears to at least intentionally handle the first case 
(self-intersections).

Is this a case of (a) the manual over-states the preconditions or (b) 
the code does not check the preconditions, and may be functioning 
incorrectly in a way I have not detected?

Thanks!!!
Ben




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