Go nuts with Qt

[ipdf/code.git] / src / bezier.h

diff --git a/src/bezier.h b/src/bezier.h
index 722ed57..f3df458 100644 (file)
--- a/src/bezier.h
+++ b/src/bezier.h
@@ -11,8 +11,8 @@ namespace IPDF
        
        inline std::pair<Real,Real> SolveQuadratic(const Real & a, const Real & b, const Real & c)
        {
-               Real x0((b + Sqrt(b*b - Real(4)*a*c))/(Real(2)*a));
-               Real x1((b - Sqrt(b*b - Real(4)*a*c))/(Real(2)*a));
+               Real x0((-b + Sqrt(b*b - Real(4)*a*c))/(Real(2)*a));
+               Real x1((-b - Sqrt(b*b - Real(4)*a*c))/(Real(2)*a));
                return std::pair<Real,Real>(x0,x1);
        }