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Fixed exceptional case of y-degree 0

This commit is contained in:
Michael Kerber 2008-10-02 12:24:13 +00:00
parent add980ff77
commit e78b316615
1 changed files with 14 additions and 13 deletions
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27
Algebraic_kernel_d/include/CGAL/Algebraic_curve_kernel_2/Curve_analysis_2.h
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@ -1519,23 +1519,24 @@ private:
bool speed_up=false;
#endif
if(! speed_up) {
// Compute resultant using the Sturm-Habicht sequence
if(polynomial_2().degree() == 0) {
if(polynomial_2().degree() == 0) {
this->ptr()->resultant_of_primitive_and_derivative_y
= Polynomial_1(1);
} else {
this->ptr()->resultant_of_primitive_and_derivative_y
= principal_sturm_habicht_of_primitive(0);
}
} else {
this->ptr()->resultant_of_primitive_and_derivative_y
= CGAL::CGALi::resultant
(primitive_polynomial_2(),
CGAL::diff(primitive_polynomial_2()));
if(! speed_up) {
// Compute resultant using the Sturm-Habicht sequence
this->ptr()->resultant_of_primitive_and_derivative_y
= principal_sturm_habicht_of_primitive(0);
} else {
this->ptr()->resultant_of_primitive_and_derivative_y
= CGAL::CGALi::resultant
(primitive_polynomial_2(),
CGAL::diff(primitive_polynomial_2()));
}
}