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-rw-r--r--Eigen/src/Geometry/Quaternion.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/Eigen/src/Geometry/Quaternion.h b/Eigen/src/Geometry/Quaternion.h
index e90ce77eb..e84fecf33 100644
--- a/Eigen/src/Geometry/Quaternion.h
+++ b/Eigen/src/Geometry/Quaternion.h
@@ -162,7 +162,7 @@ class QuaternionBase : public RotationBase<Derived, 3>
{ return coeffs().isApprox(other.coeffs(), prec); }
/** return the result vector of \a v through the rotation*/
- EIGEN_STRONG_INLINE Vector3 _transformVector(Vector3 v) const;
+ EIGEN_STRONG_INLINE Vector3 _transformVector(const Vector3 &v) const;
/** \returns \c *this with scalar type casted to \a NewScalarType
*
@@ -462,7 +462,7 @@ EIGEN_STRONG_INLINE Derived& QuaternionBase<Derived>::operator*= (const Quaterni
*/
template <class Derived>
EIGEN_STRONG_INLINE typename QuaternionBase<Derived>::Vector3
-QuaternionBase<Derived>::_transformVector(Vector3 v) const
+QuaternionBase<Derived>::_transformVector(const Vector3 &v) const
{
// Note that this algorithm comes from the optimization by hand
// of the conversion to a Matrix followed by a Matrix/Vector product.