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Re: [cgal-discuss] precondition_fail on Polygon_set_2::join(const Polygon_2& pgn)


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  • From: Ben Supnik <>
  • To:
  • Subject: Re: [cgal-discuss] precondition_fail on Polygon_set_2::join(const Polygon_2& pgn)
  • Date: Fri, 19 Mar 2010 11:14:06 -0400

Yes - boolean polygon ops require exact constructions.

cheers
ben

Remi wrote:
In a loop I'm adding simple polygons (triangles) to an empty polygon
set - all of them have counterclockwise orientation. However at some
point (let's say at 400th triangle) I get a failure at this line:
CGAL_multiset_precondition (comp_f(object, nodeP->object) != LARGER);
of the method:
template <class Type, class Compare, typename Allocator>
typename Multiset<Type, Compare, Allocator>::iterator
Multiset<Type, Compare, Allocator>::insert_before (iterator position,
const Type& object)

I have no idea what this means and what is the cause :( Could it be
caused by using CGAL::Exact_predicates_inexact_constructions_kernel ?


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