.. Copyright 2016 The Cartographer Authors

.. Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

..      http://www.apache.org/licenses/LICENSE-2.0

.. Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

============================
Cartographer ROS Integration
============================

.. toctree::
   :maxdepth: 2
   :hidden:

   demo

`Cartographer`_ is a system that provides real-time simultaneous localization
and mapping `SLAM`_ across multiple platforms and sensor configurations. This
project provides Cartographer's ROS integration.

.. _Cartographer: https://github.com/googlecartographer/cartographer
.. _SLAM: http://en.wikipedia.org/wiki/Simultaneous_localization_and_mapping

.. _getting-started:

Getting Started
===============

Installation has been tested on Ubuntu 14.04 (Trusty) with ROS Indigo and on
Ubuntu 16.04 (Xenial) with ROS Kinetic. For ROS Kinetic, simply replace the two
occurrences of "indigo" with "kinetic" in the instructions below. There are
multiple options for building cartographer_ros as part of a ROS workspace. Two
common use cases are described below.

These dependencies always have to be installed:

  .. code-block:: bash

    # Install the required libraries that are available as debs
    sudo apt-get install \
      ros-indigo-tf2-eigen \
      g++ \
      google-mock \
      libboost-all-dev \
      liblua5.2-dev \
      libprotobuf-dev \
      libsuitesparse-dev \
      libwebp-dev \
      protobuf-compiler \
      python-sphinx \
      libpcap-dev  # For 3D SLAM with Velodynes

Standalone Workspace
--------------------

  .. code-block:: bash

    # Set up your Catkin workspace
    mkdir -p ~/catkin_ws/src
    cd ~/catkin_ws/src
    source /opt/ros/indigo/setup.bash
    catkin_init_workspace

    # Clone the necessary repos into your Catkin workspace
    git clone https://github.com/googlecartographer/cartographer.git
    git clone https://github.com/googlecartographer/cartographer_ros.git
    git clone https://github.com/ethz-asl/ceres_catkin.git  # Caution! Make sure you do not have "suitesparse" in your Catkin workspace
    git clone https://github.com/ethz-asl/glog_catkin.git
    git clone https://github.com/ethz-asl/gflags_catkin.git
    git clone https://github.com/ethz-asl/catkin_simple.git
    git clone https://github.com/ros-drivers/velodyne.git  # For 3D SLAM with Velodynes

    # Build everything in your Catkin workspace
    cd ~/catkin_ws
    catkin_make_isolated
    source devel_isolated/setup.bash

Using wstool
------------

If ``cartographer_ros`` is to be used as part of a pre-existing
workspace/existing project, using `wstool <http://wiki.ros.org/wstool>`_ is
recommended.

  .. code-block:: bash

    # Enter workspace root (i.e. the folder that has "src" as a subfolder)
    # Merge the cartographer_ros rosinstall file
    wstool merge https://raw.githubusercontent.com/googlecartographer/cartographer_ros/master/cartographer_ros.rosinstall

    # Update workspace
    wstool update

    # Build workspace contents. It is recommended to use catkin tools:
    catkin build