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setup_eigen.md

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How to Set Up Eigen Library

There are three ways to set up Eigen:

  • install from package managers (for Mac and Ubuntu)
  • download library release (for all OSs)
  • download source and install (for all OSs)

Below, we discuss these options in detail

Mac

Install from Package Manager

Use the Mac's package manager brew for installation

$ brew install eigen

Download Library

The repository can be downloaded from

http://eigen.tuxfamily.org/index.php?title=Main_Page#Download

  1. Download the compressed file (e.g., eigen-3.*.*.zip) and extract it. This result in a directory eigen-3.*.*
  2. Put the extracted directory under the external directory as acg-<username>/external/eigen-3.*.* .

Make sure you have a header file Dense at

acg-<username>/external/eigen-3.*.*/Eigen/Dense

Clone Library

Instead of download, you can clone the Eigen repository.

$ git submodule update --init external/eigen # clone the "eigen" repository

Make sure you have a header file Dense at

acg-<username>/external/eigen/Eigen/Dense

Ubuntu or Windows Subsystem for Linux (WSL)

Install from Package Manager

For ubuntu, install eigen using apt-get as

$ sudo apt-get install libeigen3-dev

Download Library

The repository can be downloaded from here:

http://eigen.tuxfamily.org/index.php?title=Main_Page#Download

  1. Download the compressed file (e.g., eigen-3.*.*.zip) and extract it. This result in a directory eigen-3.*.*
  2. Put the extracted file under the external directory as acg-<username>/external/eigen-3.*.* .

Make sure you have a header file Dense at

acg-<username>/external/eigen-3.*.*/Eigen/Dense

Clone Repository

The only difference is that instead of download we use submodule to clone the Eigen repository.

$ git submodule update --init external/eigen # clone the "eigen" repository (this may take one or two mins)

Make sure you have a header file Dense at

acg-<username>/external/eigen/Eigen/Dense

Windows

Download Library

Download the repository from here

http://eigen.tuxfamily.org/index.php?title=Main_Page#Download

  1. Download the compressed file (e.g., eigen-3.*.*.zip) and extract it. This result in a directory eigen-3.*.*
  2. Put the extracted file under the external directory as acg-<username>/external/eigen-3.*.* .

Make sure you have a header file Dense at

acg-<username>/external/eigen-3.*.*/Eigen/Dense

Clone Repository

The only difference is that instead of download we use submodule to clone the Eigen repository.

$ git submodule update --init external/eigen # clone the "eigen" repository (this may take one or two mins)

Make sure you have a header file Dense at

acg-<username>/external/eigen/Eigen/Dense

Configure Eigen Library

For this course, the installation procedure above is enough. But the eigen can be further optimized for your environment by configuring the library.

To configure the eigen library, type the commands below

$ cd external/eigen # move to the eigen repository
$ mkdir build # make a directory for "out-of-source build"
$ cd build    # move to the new directory
$ cmake ..    # configure (this may take one or two mins)
$ cmake --install . --prefix ../../eigenlib # install eigen into the "eigenlib" folder

Make sure you have a header file Dense at

acg-<username>/external/eigenlib/include/eigen3/Eigen/Dense