CGAL users discussion list

[Hailong Yao <>]

Thanks very much! It works!

 

Thanks again,

Hailong

On Fri, Nov 4, 2011 at 3:22 PM, Sebastien Loriot (GeometryFactory) <> wrote:

This is a problem in the demo only.
Try patching include/CGAL/Qt/PainterOstream.h

like this:
@@ -156,6 +156,7 @@
  {
    const Point_2 proj_source = line.projection(source);
    const Point_2 proj_target = line.projection(target);
+    if (CGAL::collinear(proj_source,proj_target,center)) return;
    const Point_2 intersection = circumcenter(proj_source,
                                                proj_target,
                                                center);

Sebastien.

Hailong Yao wrote:

Dear all,
 It seems I have not received any reply on this thread.
 I thecked the CGAL manual, is there a constraint for segment Voronoi diagrams that no four points are co-circular? If so, is it difficult to solve this issue? In my inputs, there are many cases where four points are co-circular. How can I solve this problem? Any comments or suggestions? Thanks very much!
 Thanks,
Hailong

On Mon, Oct 31, 2011 at 10:04 PM, Hailong Yao < <mailto:>> wrote:

   Dear all,
        I am trying a demo of the CGAL in "Segment_Delaunay_graph_2", I can
   launch the demo and draw segments in the window to get the correct
   segment voronoi graphs for most cases. But when I draw three
   parallel vertical segments, the program crashes. Anyone has met with
   this problem? Thanks very much!
        Thanks,
   Hailong
   

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