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Re: [cgal-discuss] Line sweep example gives invalid results


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  • From: Efi Fogel <>
  • To:
  • Subject: Re: [cgal-discuss] Line sweep example gives invalid results
  • Date: Sat, 19 Jan 2013 13:02:36 +0200

I don't see the problem.
The forth argument of compute_intersection_points() indicates whether to report endpoints. By default the value of this argument is false. Thus, only 3 intersections are reported.


On Sat, Jan 19, 2013 at 12:36 PM, kierans <> wrote:
Hi there,

I built CGAL-4.1 and managed to get the
Arrangement_on_surface2_example/sweep_line to build and run. Unfortunately
for me it gives total bogus results :( It gets the number of intersections
and their values wrong.

From my reading of the example it should find 5 intersections at the
following locations:

* (3,3)
* (3,5)
* (5,5)
* (8,8)
* (8,5)

When I debug the example I get the following output:

Found 3 intersection points:
-21/-7 -21/-7
-3/-1 -5/-1
-35/-7 -35/-7

I am running on windows 7,  Microsoft Visual Studio VC++ 2010 Express
(32-bit), Boost 1.51 (32-bit) and CGAL-4.1. Any ideas on what's going on ?

Cheers,

Kieran








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