diff options
Diffstat (limited to 'Eigen/src/Core/Reverse.h')
| -rw-r--r-- | Eigen/src/Core/Reverse.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/Eigen/src/Core/Reverse.h b/Eigen/src/Core/Reverse.h index 291300a4a..b3fba9704 100644 --- a/Eigen/src/Core/Reverse.h +++ b/Eigen/src/Core/Reverse.h @@ -210,7 +210,26 @@ DenseBase<Derived>::reverse() const template<typename Derived> inline void DenseBase<Derived>::reverseInPlace() { - derived() = derived().reverse().eval(); + if(cols()>rows()) + { + Index half = cols()/2; + leftCols(half).swap(rightCols(half).reverse()); + if((cols()%2)==1) + { + Index half2 = rows()/2; + col(half).head(half2).swap(col(half).tail(half2).reverse()); + } + } + else + { + Index half = rows()/2; + topRows(half).swap(bottomRows(half).reverse()); + if((rows()%2)==1) + { + Index half2 = cols()/2; + row(half).head(half2).swap(row(half).tail(half2).reverse()); + } + } } } // end namespace Eigen |