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fix problems with leda real

This commit is contained in:
Michael Hemmer 2012-07-08 12:05:05 +00:00
parent f87bbe2479
commit 2ebc7d78c5
1 changed files with 19 additions and 8 deletions
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27
Arrangement_on_surface_2/include/CGAL/Arr_rat_arc/Algebraic_point_2.h
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@ -195,8 +195,13 @@ public:
typename BFI_traits::Set_precision set_precision;
typename BFI_polynomial_traits::Evaluate evaluate;
typedef typename BFI_traits::Bound BFIBound;
typename CGAL::Coercion_traits<Bound,BFIBound>::Cast to_bound;
long precision = 16;
Rational error_bound = CGAL::ipower(Rational(1,2),r);
Bound error_bound = CGAL::ipower(Bound(1)/2,r);
while (true)
{
set_precision(precision);
@ -213,11 +218,13 @@ public:
if (CGAL::zero_in(y_denom_bfi) == false)
{
BFI y_bfi(y_numer_bfi/y_denom_bfi);
if (CGAL::compare(CGAL::width(y_bfi),
Rational(CGAL::lower(CGAL::abs(y_bfi))) * error_bound )
to_bound(CGAL::lower(CGAL::abs(y_bfi))) * error_bound )
== SMALLER)
return std::make_pair(Bound(CGAL::lower(y_bfi)),
Bound(CGAL::upper(y_bfi)));
return std::make_pair(
to_bound(CGAL::lower(y_bfi)),
to_bound(CGAL::upper(y_bfi)));
}
else precision*=2;
}
@ -258,7 +265,11 @@ private:
{
typename BFI_traits::Set_precision set_precision;
typename BFI_polynomial_traits::Evaluate evaluate;
Rational error_bound = CGAL::ipower(Rational(1,2),a);
typedef typename BFI_traits::Bound BFIBound;
typename CGAL::Coercion_traits<Bound,BFIBound>::Cast to_bound;
Bound error_bound = CGAL::ipower(Bound(1)/2,a);
while (true)
{
set_precision(precision);
@ -273,9 +284,9 @@ private:
if (CGAL::zero_in(y_denom_bfi) == false)
{
BFI y_bfi(y_numer_bfi/y_denom_bfi);
if (Bound(CGAL::width(y_bfi)) < error_bound )
return std::make_pair(Bound(CGAL::lower(y_bfi)),
Bound(CGAL::upper(y_bfi)) );
if (to_bound(CGAL::width(y_bfi)) < error_bound )
return std::make_pair(to_bound(CGAL::lower(y_bfi)),
to_bound(CGAL::upper(y_bfi)) );
}
else precision*=2;
}