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Removed Column and Row in favor of Block

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This commit is contained in:
Gael Guennebaud
2008-03-12 18:10:52 +00:00
parent 6da4d9d256
commit 35bce20954
14 changed files with 122 additions and 277 deletions
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60
Eigen/src/Core/Block.h
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@@ -79,6 +79,24 @@ template<typename MatrixType, int BlockRows, int BlockCols> class Block
typedef typename MatrixType::AsArg MatRef;
/** Column or Row constructor
*/
Block(const MatRef& matrix, int i)
: m_matrix(matrix),
// It is a row if and only if BlockRows==1 and BlockCols==MatrixType::ColsAtCompileTime,
// and it is a column if and only if BlockRows==MatrixType::RowsAtCompileTime and BlockCols==1,
// all other cases are invalid.
// The case a 1x1 matrix looks ambibuous, but the result is the same anyway.
m_startRow( (BlockRows==1) && (BlockCols==MatrixType::ColsAtCompileTime) ? i : 0),
m_startCol( (BlockRows==MatrixType::RowsAtCompileTime) && (BlockCols==1) ? i : 0),
m_blockRows(matrix.rows()), // if it is a row, then m_blockRows has a fixed-size of 1, so no pb to try to overwrite it
m_blockCols(matrix.cols()) // same for m_blockCols
{
assert( (i>=0) && (
((BlockRows==1) && (BlockCols==MatrixType::ColsAtCompileTime) && i<matrix.rows())
||((BlockRows==MatrixType::RowsAtCompileTime) && (BlockCols==1) && i<matrix.cols())));
}
/** Fixed-size constructor
*/
Block(const MatRef& matrix, int startRow, int startCol)
@@ -354,4 +372,46 @@ const Block<Derived, BlockRows, BlockCols> MatrixBase<Derived>
return Block<Derived, BlockRows, BlockCols>(asArg(), startRow, startCol);
}
/** \returns an expression of the \a i-th column of *this. Note that the numbering starts at 0.
*
* Example: \include MatrixBase_col.cpp
* Output: \verbinclude MatrixBase_col.out
*
* \sa row(), class Block */
template<typename Derived>
Block<Derived, ei_traits<Derived>::RowsAtCompileTime, 1>
MatrixBase<Derived>::col(int i)
{
return Block<Derived, ei_traits<Derived>::RowsAtCompileTime, 1>(asArg(), i);
}
/** This is the const version of col(). */
template<typename Derived>
const Block<Derived, ei_traits<Derived>::RowsAtCompileTime, 1>
MatrixBase<Derived>::col(int i) const
{
return Block<Derived, ei_traits<Derived>::RowsAtCompileTime, 1>(asArg(), i);
}
/** \returns an expression of the \a i-th row of *this. Note that the numbering starts at 0.
*
* Example: \include MatrixBase_row.cpp
* Output: \verbinclude MatrixBase_row.out
*
* \sa col(), class Block */
template<typename Derived>
Block<Derived, 1, ei_traits<Derived>::ColsAtCompileTime>
MatrixBase<Derived>::row(int i)
{
return Block<Derived, 1, ei_traits<Derived>::ColsAtCompileTime>(asArg(), i);
}
/** This is the const version of row(). */
template<typename Derived>
const Block<Derived, 1, ei_traits<Derived>::ColsAtCompileTime>
MatrixBase<Derived>::row(int i) const
{
return Block<Derived, 1, ei_traits<Derived>::ColsAtCompileTime>(asArg(), i);
}
#endif // EIGEN_BLOCK_H