EigenTypes.h

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// Copyright (c) 2019, Bailin Deng
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#ifndef EIGENTYPES_H
#define EIGENTYPES_H

#include <Eigen/Dense>
#include <Eigen/Sparse>

// Define eigen matrix types
typedef Eigen::Matrix<double, 3, Eigen::Dynamic> Matrix3X;
typedef Eigen::Matrix<double, 2, Eigen::Dynamic> Matrix2X;
typedef Eigen::Matrix<int, 2, Eigen::Dynamic> Matrix2Xi;
typedef Eigen::Matrix<double, Eigen::Dynamic, 3> MatrixX3;
typedef Eigen::Matrix<double, Eigen::Dynamic, 2> MatrixX2;
typedef Eigen::Matrix<double, 3, 2> Matrix32;
typedef Eigen::Matrix<int, 3, Eigen::Dynamic> Matrix3Xi;
typedef Eigen::VectorXd DenseVector;
typedef Eigen::VectorXi IndexVector;
typedef Eigen::Vector2i IndexPair;

// Conversion between a 3d vector type to Eigen::Vector3d
template<typename Vec_T>
inline Eigen::Vector3d to_eigen_vec3d(const Vec_T &vec) {
  return Eigen::Vector3d(vec[0], vec[1], vec[2]);
}

template<typename Vec_T>
inline Vec_T from_eigen_vec3d(const Eigen::Vector3d &vec) {
  Vec_T v;
  v[0] = vec(0);
  v[1] = vec(1);
  v[2] = vec(2);

  return v;
}

#endif // EIGENTYPES_H