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Eigen::Isometry3d M = Eigen::Isometry3d::Identity();
cout << M.rotation <<endl;

When I typed the '.' after M, the 'rotation' popped out in the list, compiled the file and run, come to the error: 

invalid use of non-static member function...
JeJo
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XJY95
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1 Answers1

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It is a member function and hence you need to call it. Try 

std::cout << M.rotation() << std::endl;
//                     ^^

This has been defined in the header Transform.h; goto its definition for further details.

JeJo
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