I just started to use Eigen and found it very powerful. So good I want to use it as base class form my c++ geometry classes.
I would like to have a CGeoVector3D class derive directly from Eigen::Matrix<Real, 1, 3> and take advantage Eigen's neat operator overloading.
The problem is I tried it and it does not inherit the assignment operator and constructor.
Is there a document where this is explained?

B. Araujo.

OK. I think I figured it out. I had a look at:

http://www.cs.cornell.edu/courses/CS663 ... ource.html

The code:

#pragma once

#include <Eigen/Dense>

template <typename Real>
struct CGeoVertex3 : public Eigen::Matrix<Real, 3, 1>
{
public:

typedef Eigen::Matrix<Real, 3, 1> Base;

inline CGeoVertex3(Real value = (Real) 0) { setConstant(value); }

inline CGeoVertex3(const Real x, const Real y, const Real z) :
Base(x, y, z) { }

template <typename Derived>
inline CGeoVertex3(const Eigen::MatrixBase<Derived>& p) : Base(p) { }

template <typename Derived>
CGeoVertex3 &operator=(const Eigen::MatrixBase<Derived>& p)
{
this->Base::operator=(p);
return *this;
}

};