array_reverse.cpp File Reference

#include "main.h"
#include <iostream>

Functions
template<typename MatrixType >
void	reverse (const MatrixType &m)
template<int >
void	array_reverse_extra ()
template<typename MatrixType >
EIGEN_DONT_INLINE void	bug1684_job1 (MatrixType &m1, MatrixType &m2)
template<typename MatrixType >
EIGEN_DONT_INLINE void	bug1684_job2 (MatrixType &m1, MatrixType &m2)
template<typename MatrixType >
EIGEN_DONT_INLINE void	bug1684_job3 (MatrixType &m1, MatrixType &m2)
template<int >
void	bug1684 ()
	EIGEN_DECLARE_TEST (array_reverse)

Function Documentation

array_reverse_extra()

template<int >

void array_reverse_extra

(

)

                           {
  Vector4f x;
  x << 1, 2, 3, 4;
  Vector4f y;
  y << 4, 3, 2, 1;
  VERIFY(x.reverse()[1] == 3);
  VERIFY(x.reverse() == y);
}

References VERIFY, plotDoE::x, and y.

bug1684()

template<int >

void bug1684

(

)

               {
  Matrix4f m1 = Matrix4f::Random();
  Matrix4f m2 = Matrix4f::Random();
  bug1684_job1(m1, m2);
  VERIFY_IS_APPROX(m2, m1.rowwise().reverse().eval());
  bug1684_job2(m1, m2);
  VERIFY_IS_APPROX(m2, m1.rowwise().reverse().eval());
  // This one still fail after our swap's workaround,
  // but I expect users not to implement their own swap.
  // bug1684_job3(m1,m2);
  // VERIFY_IS_APPROX(m2, m1.rowwise().reverse().eval());
}

References bug1684_job1(), bug1684_job2(), m1, m2(), and VERIFY_IS_APPROX.

bug1684_job1()

template<typename MatrixType >

EIGEN_DONT_INLINE void bug1684_job1	(	MatrixType &	m1,
		MatrixType &	m2
	)

                                                                    {
  m2 = m1;
  m2.col(0).swap(m2.col(3));
  m2.col(1).swap(m2.col(2));
}

References m1, and m2().

Referenced by bug1684().

bug1684_job2()

template<typename MatrixType >

EIGEN_DONT_INLINE void bug1684_job2	(	MatrixType &	m1,
		MatrixType &	m2
	)

                                                                    {
  m2 = m1;                // load m1/m2 in AVX registers
  m1.col(0) = m2.col(3);  // perform 128 bits moves
  m1.col(1) = m2.col(2);
  m1.col(2) = m2.col(1);
  m1.col(3) = m2.col(0);
}

References m1, and m2().

Referenced by bug1684().

bug1684_job3()

template<typename MatrixType >

EIGEN_DONT_INLINE void bug1684_job3	(	MatrixType &	m1,
		MatrixType &	m2
	)

                                                                    {
  m2 = m1;
  Vector4f tmp;
  tmp = m2.col(0);
  m2.col(0) = m2.col(3);
  m2.col(3) = tmp;
  tmp = m2.col(1);
  m2.col(1) = m2.col(2);
  m2.col(2) = tmp;
}

References m1, m2(), and tmp.

EIGEN_DECLARE_TEST()

EIGEN_DECLARE_TEST

(

array_reverse

)

                                  {
  for (int i = 0; i < g_repeat; i++) {
    CALL_SUBTEST_1(reverse(Matrix<float, 1, 1>()));
    CALL_SUBTEST_2(reverse(Matrix2f()));
    CALL_SUBTEST_3(reverse(Matrix4f()));
    CALL_SUBTEST_4(reverse(Matrix4d()));
    CALL_SUBTEST_5(reverse(
        MatrixXcf(internal::random<int>(1, EIGEN_TEST_MAX_SIZE), internal::random<int>(1, EIGEN_TEST_MAX_SIZE))));
    CALL_SUBTEST_6(reverse(
        MatrixXi(internal::random<int>(1, EIGEN_TEST_MAX_SIZE), internal::random<int>(1, EIGEN_TEST_MAX_SIZE))));
    CALL_SUBTEST_7(reverse(
        MatrixXcd(internal::random<int>(1, EIGEN_TEST_MAX_SIZE), internal::random<int>(1, EIGEN_TEST_MAX_SIZE))));
    CALL_SUBTEST_8(reverse(Matrix<float, 100, 100>()));
    CALL_SUBTEST_9(reverse(Matrix<float, Dynamic, Dynamic, RowMajor>(internal::random<int>(1, EIGEN_TEST_MAX_SIZE),
                                                                     internal::random<int>(1, EIGEN_TEST_MAX_SIZE))));
    CALL_SUBTEST_3(bug1684<0>());
  }
  CALL_SUBTEST_3(array_reverse_extra<0>());
}

References CALL_SUBTEST_1, CALL_SUBTEST_2, CALL_SUBTEST_3, CALL_SUBTEST_4, CALL_SUBTEST_5, CALL_SUBTEST_6, CALL_SUBTEST_7, CALL_SUBTEST_8, CALL_SUBTEST_9, EIGEN_TEST_MAX_SIZE, Eigen::g_repeat, i, and reverse().

reverse()

template<typename MatrixType >

void reverse

(

const MatrixType &

m

)

                                  {
  typedef typename MatrixType::Scalar Scalar;
  typedef Matrix<Scalar, MatrixType::RowsAtCompileTime, 1> VectorType;
 
  Index rows = m.rows();
  Index cols = m.cols();
 
  // this test relies a lot on Random.h, and there's not much more that we can do
  // to test it, hence I consider that we will have tested Random.h
  MatrixType m1 = MatrixType::Random(rows, cols), m2;
  VectorType v1 = VectorType::Random(rows);
 
  MatrixType m1_r = m1.reverse();
  // Verify that MatrixBase::reverse() works
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_r(i, j), m1(rows - 1 - i, cols - 1 - j));
    }
  }
 
  Reverse<MatrixType> m1_rd(m1);
  // Verify that a Reverse default (in both directions) of an expression works
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_rd(i, j), m1(rows - 1 - i, cols - 1 - j));
    }
  }
 
  Reverse<MatrixType, BothDirections> m1_rb(m1);
  // Verify that a Reverse in both directions of an expression works
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_rb(i, j), m1(rows - 1 - i, cols - 1 - j));
    }
  }
 
  Reverse<MatrixType, Vertical> m1_rv(m1);
  // Verify that a Reverse in the vertical directions of an expression works
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_rv(i, j), m1(rows - 1 - i, j));
    }
  }
 
  Reverse<MatrixType, Horizontal> m1_rh(m1);
  // Verify that a Reverse in the horizontal directions of an expression works
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_rh(i, j), m1(i, cols - 1 - j));
    }
  }
 
  VectorType v1_r = v1.reverse();
  // Verify that a VectorType::reverse() of an expression works
  for (int i = 0; i < rows; i++) {
    VERIFY_IS_APPROX(v1_r(i), v1(rows - 1 - i));
  }
 
  MatrixType m1_cr = m1.colwise().reverse();
  // Verify that PartialRedux::reverse() works (for colwise())
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_cr(i, j), m1(rows - 1 - i, j));
    }
  }
 
  MatrixType m1_rr = m1.rowwise().reverse();
  // Verify that PartialRedux::reverse() works (for rowwise())
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      VERIFY_IS_APPROX(m1_rr(i, j), m1(i, cols - 1 - j));
    }
  }
 
  Scalar x = internal::random<Scalar>();
 
  Index r = internal::random<Index>(0, rows - 1), c = internal::random<Index>(0, cols - 1);
 
  m1.reverse()(r, c) = x;
  VERIFY_IS_APPROX(x, m1(rows - 1 - r, cols - 1 - c));
 
  m2 = m1;
  m2.reverseInPlace();
  VERIFY_IS_APPROX(m2, m1.reverse().eval());
 
  m2 = m1;
  m2.col(0).reverseInPlace();
  VERIFY_IS_APPROX(m2.col(0), m1.col(0).reverse().eval());
 
  m2 = m1;
  m2.row(0).reverseInPlace();
  VERIFY_IS_APPROX(m2.row(0), m1.row(0).reverse().eval());
 
  m2 = m1;
  m2.rowwise().reverseInPlace();
  VERIFY_IS_APPROX(m2, m1.rowwise().reverse().eval());
 
  m2 = m1;
  m2.colwise().reverseInPlace();
  VERIFY_IS_APPROX(m2, m1.colwise().reverse().eval());
 
  m1.colwise().reverse()(r, c) = x;
  VERIFY_IS_APPROX(x, m1(rows - 1 - r, c));
 
  m1.rowwise().reverse()(r, c) = x;
  VERIFY_IS_APPROX(x, m1(r, cols - 1 - c));
}

References calibrate::c, cols, i, j, m, m1, m2(), UniformPSDSelfTest::r, rows, v1(), VERIFY_IS_APPROX, and plotDoE::x.

Referenced by Eigen::TensorEvaluator< const TensorReverseOp< ReverseDimensions, ArgType >, Device >::block(), check_indexed_view(), check_tutorial_examples(), dotcw(), dotuw(), EIGEN_DECLARE_TEST(), NurbsSurface::flipOrientation(), oomph::TriangleMeshPolyLine::reverse(), Eigen::DenseBase< Derived >::reverseInPlace(), Eigen::HouseholderSequence< VectorsType, CoeffsType, Side >::setReverseFlag(), swap(), test_eval_tensor_reverse(), test_execute_reverse_rvalue(), and testVectorType().