Hello,

I would like to introduce a pre-defined matrix such as Zero() or Identity(). Mine is called Invalid() and is currently generated this way inside MatrixBase_plugin.h:

Code: Select all

/// \brief Generates and invalid matrix.
static Matrix<Scalar, RowsAtCompileTime, ColsAtCompileTime> Invalid()
{
    static Matrix<Scalar, RowsAtCompileTime, ColsAtCompileTime> invalidMat;

    invalidMat.fill(std::numeric_limits<Scalar>::max());

    return invalidMat;
}


I am a bit embarrassed with this bit of code because each time I call function Invalid() it refills the matrix.

Anyone has a better than mine?

Thanks,

Antoine.

You could return a CwiseNullaryOp, here a constant matrix:

ConstantReturnType Invalid() {
return Constant(std::numeric_limits<Scalar>::max());
}

Thanks!