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- move: DerivedTraits becomes MatrixBase::Traits

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- the static constants are private again in the Derived classes
- more documentation and code snippets
- new isDiagonal() method
This commit is contained in:
Benoit Jacob
2008-01-06 16:35:21 +00:00
parent aaf889e72b
commit 84934ea217
40 changed files with 304 additions and 177 deletions
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22
Eigen/src/Core/Zero.h
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@@ -39,10 +39,10 @@ template<typename MatrixType> class Zero : NoOperatorEquals,
typedef typename MatrixType::Scalar Scalar;
friend class MatrixBase<Scalar, Zero<MatrixType> >;
static const int RowsAtCompileTime = MatrixType::RowsAtCompileTime,
ColsAtCompileTime = MatrixType::ColsAtCompileTime;
private:
static const int RowsAtCompileTime = MatrixType::Traits::RowsAtCompileTime,
ColsAtCompileTime = MatrixType::Traits::ColsAtCompileTime;
const Zero& _ref() const { return *this; }
int _rows() const { return m_rows; }
int _cols() const { return m_cols; }
@@ -125,13 +125,21 @@ const Zero<Derived> MatrixBase<Scalar, Derived>::zero()
return Zero<Derived>(Traits::RowsAtCompileTime, Traits::ColsAtCompileTime);
}
/** \returns true if *this is approximately equal to the zero matrix,
* within the precision given by \a prec.
*
* Example: \include MatrixBase_isZero.cpp
* Output: \verbinclude MatrixBase_isZero.out
*
* \sa class Zero, zero()
*/
template<typename Scalar, typename Derived>
bool MatrixBase<Scalar, Derived>::isZero
(const typename NumTraits<Scalar>::Real& prec = precision<Scalar>()) const
(typename NumTraits<Scalar>::Real prec = precision<Scalar>()) const
{
for(int j = 0; j < col(); j++)
for(int i = 0; i < row(); i++)
if(!isMuchSmallerThan(coeff(i, j), static_cast<Scalar>(1)))
for(int j = 0; j < cols(); j++)
for(int i = 0; i < rows(); i++)
if(!Eigen::isMuchSmallerThan(coeff(i, j), static_cast<Scalar>(1), prec))
return false;
return true;
}