You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 

27 lines
722 B

#include <Eigen/Core>
#include <iostream>
using namespace StormEigen;
using namespace std;
template<typename Derived>
StormEigen::Block<Derived, 2, 2>
topLeft2x2Corner(MatrixBase<Derived>& m)
{
return StormEigen::Block<Derived, 2, 2>(m.derived(), 0, 0);
}
template<typename Derived>
const StormEigen::Block<const Derived, 2, 2>
topLeft2x2Corner(const MatrixBase<Derived>& m)
{
return StormEigen::Block<const Derived, 2, 2>(m.derived(), 0, 0);
}
int main(int, char**)
{
Matrix3d m = Matrix3d::Identity();
cout << topLeft2x2Corner(4*m) << endl; // calls the const version
topLeft2x2Corner(m) *= 2; // calls the non-const version
cout << "Now the matrix m is:" << endl << m << endl;
return 0;
}