[eigen] UnalignedArrayAssert... |

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I am lost with all the assert failures.
I am using a 2x2 double matrix in such a class construct:
#include <Core>
USING_PART_OF_NAMESPACE_EIGEN
typedef Matrix<double,2,2> MatrixABCD;
class ABCDPrivate
{
public:
MatrixABCD matrix;
public:
// necessary for EIGEN Libary
EIGEN_MAKE_ALIGNED_OPERATOR_NEW
};
ABCD::ABCD()
: d(new ABCDPrivate)
{
d->matrix.setIdentity();
}
this now seems to work.
But then it fails here: ( Lens is derived public from ABCD)
void Lens::setFocalLength(double focallength)
{
m_FocalLength = focallength;
MatrixABCD matrix; <<--- failure
matrix << 1.0 , 0.0, -1.0/m_FocalLength , 1.0;
setMatrix(matrix);
}
why?

`also I am using the class ABCD in a std::vector do I need to take
``special care of that?
`

`This class collection is part of a workshop (next week) on programming
``for physicists and I wanted to
``use a decent matrix class instead of a simple self written class (which
``would be much easier to use
`and understand).
Matthias