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cgal
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Use CGAL::sqrt() rather than std::sqrt()

This commit is contained in:
andrew morton 2015-04-06 22:44:27 -07:00
parent fa281d882f
commit 21295f07aa
1 changed files with 6 additions and 6 deletions
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12
Principal_component_analysis/include/CGAL/eigen_2.h
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@ -86,8 +86,8 @@ namespace internal {
} }
else // generic case else // generic case
{ {
FT l1 = (FT)(0.5 * ( -1*std::sqrt(p) + c + a)); FT l1 = (FT)(0.5 * ( -1*CGAL::sqrt(p) + c + a));
FT l2 = (FT)(0.5 * ( std::sqrt(p) + c + a)); FT l2 = (FT)(0.5 * ( CGAL::sqrt(p) + c + a));
// all eigen values of a symmetric positive // all eigen values of a symmetric positive
// definite matrix must be real and positive // definite matrix must be real and positive
@ -101,15 +101,15 @@ namespace internal {
{ {
eigen_values.first = l1; eigen_values.first = l1;
eigen_values.second = l2; eigen_values.second = l2;
eigen_vectors.first = Vector((FT)1.0, (FT)(-(std::sqrt(p)-c+a) / (2*b))); eigen_vectors.first = Vector((FT)1.0, (FT)(-(CGAL::sqrt(p)-c+a) / (2*b)));
eigen_vectors.second = Vector((FT)1.0, (FT)( (std::sqrt(p)+c-a) / (2*b))); eigen_vectors.second = Vector((FT)1.0, (FT)( (CGAL::sqrt(p)+c-a) / (2*b)));
} }
else else
{ {
eigen_values.first = l2; eigen_values.first = l2;
eigen_values.second = l1; eigen_values.second = l1;
eigen_vectors.first = Vector((FT)1.0, (FT)( (std::sqrt(p)+c-a) / (2*b))); eigen_vectors.first = Vector((FT)1.0, (FT)( (CGAL::sqrt(p)+c-a) / (2*b)));
eigen_vectors.second = Vector((FT)1.0, (FT)(-(std::sqrt(p)-c+a) / (2*b))); eigen_vectors.second = Vector((FT)1.0, (FT)(-(CGAL::sqrt(p)-c+a) / (2*b)));
} }
} // end generic case } // end generic case
} // end non-degenerate case } // end non-degenerate case