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Make reverseInPlace really work in-place.

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This commit is contained in:
Gael Guennebaud
2015-03-31 20:17:10 +02:00
parent 20d030f207
commit dfb674a25e
2 changed files with 37 additions and 6 deletions
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21
Eigen/src/Core/Reverse.h
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@@ -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