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optimize inverse permutations

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This commit is contained in:
Gael Guennebaud
2010-02-25 15:31:15 +01:00
parent 77c922bf05
commit d9ca0c0d36
2 changed files with 122 additions and 21 deletions
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4
test/permutationmatrices.cpp
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@@ -51,7 +51,7 @@ template<typename MatrixType> void permutationmatrices(const MatrixType& m)
typedef Matrix<int, Rows, 1> LeftPermutationVectorType;
typedef PermutationMatrix<Cols> RightPermutationType;
typedef Matrix<int, Cols, 1> RightPermutationVectorType;
int rows = m.rows();
int cols = m.cols();
@@ -72,7 +72,7 @@ template<typename MatrixType> void permutationmatrices(const MatrixType& m)
Matrix<Scalar,Cols,Cols> rm(rp);
VERIFY_IS_APPROX(m_permuted, lm*m_original*rm);
VERIFY_IS_APPROX(lp.inverse()*m_permuted*rp.inverse(), m_original);
VERIFY((lp*lp.inverse()).toDenseMatrix().isIdentity());