Eigen.h File Reference

#include <Eigen/Dense>
#include <Eigen/Eigenvalues>
#include <cassert>
#include <vector>

Go to the source code of this file.

Namespaces
namespace	eonc
	RAII resource manager for the ARTn C library with global synchronization.

Typedefs
using	MatrixXd
using	Matrix3d = Eigen::Matrix<double, 3, 3, eOnStorageOrder>
using	Matrix4d = Eigen::Matrix<double, 4, 4, eOnStorageOrder>
using	AtomMatrix = Eigen::Matrix<double, Eigen::Dynamic, 3, eOnStorageOrder>
using	RotationMatrix = Eigen::Matrix<double, 3, 3, eOnStorageOrder>
using	AtomMatrixF = Eigen::Matrix<double, 3, Eigen::Dynamic, Eigen::ColMajor>

Functions
double	matDot (const AtomMatrix &a, const AtomMatrix &b)
	SIMD-optimized dot product for contiguous Eigen matrices.
AtomMatrix	eonc::from_fortran_layout_vector (const std::vector< double > &flat_colmajor, int nat)
	Reconstruct AtomMatrix from a flat column-major vector (e.g.

Variables
constexpr int	eOnStorageOrder = Eigen::RowMajor

Typedef Documentation

AtomMatrix

using AtomMatrix = Eigen::Matrix<double, Eigen::Dynamic, 3, eOnStorageOrder>

Definition at line 37 of file Eigen.h.

AtomMatrixF

using AtomMatrixF = Eigen::Matrix<double, 3, Eigen::Dynamic, Eigen::ColMajor>

Definition at line 44 of file Eigen.h.

Matrix3d

using Matrix3d = Eigen::Matrix<double, 3, 3, eOnStorageOrder>

Definition at line 35 of file Eigen.h.

Matrix4d

using Matrix4d = Eigen::Matrix<double, 4, 4, eOnStorageOrder>

Definition at line 36 of file Eigen.h.

MatrixXd

using MatrixXd

Initial value:

 
Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, eOnStorageOrder>

Definition at line 33 of file Eigen.h.

RotationMatrix

using RotationMatrix = Eigen::Matrix<double, 3, 3, eOnStorageOrder>

Definition at line 38 of file Eigen.h.

Function Documentation

matDot()

double matDot ( const AtomMatrix & a, const AtomMatrix & b )

inline

SIMD-optimized dot product for contiguous Eigen matrices.

Maps both operands as flat VectorXd and uses Eigen's optimized .dot() which leverages SSE/AVX intrinsics, avoiding the element-wise temporary that (a.array() * b.array()).sum() creates.

Definition at line 50 of file Eigen.h.

                                                               {
  return Eigen::Map<const VectorXd>(a.data(), a.size())
      .dot(Eigen::Map<const VectorXd>(b.data(), b.size()));
}

Variable Documentation

eOnStorageOrder

int eOnStorageOrder = Eigen::RowMajor

constexpr

Definition at line 31 of file Eigen.h.