<commit_before>====
PyDy
====

.. image:: https://pypip.in/version/pydy/badge.svg
    :target: https://pypi.python.org/pypi/pydy/
    :alt: Latest Version

.. image:: https://travis-ci.org/pydy/pydy.png?branch=master
   :target: https://travis-ci.org/pydy/pydy

PyDy_, short for Python Dynamics, is a tool kit written in the Python
programming language that utilizes an array of scientific programs to enable
the study of multibody dynamics. The goal is to have a modular framework and
eventually a physics abstraction layer which utilizes a variety of backends
that can provide the user with their desired workflow, including:

.. _PyDy: http://pydy.org

- Model specification
- Equation of motion generation
- Simulation
- Visualization
- Publication

We started by building the SymPy_ `mechanics package`_ which provides an API
for building models and generating the symbolic equations of motion for complex
multibody systems and have more recently developed two packages, `pydy.codegen`
and `pydy.viz`, for simulation and visualization of the models, respectively.
The remaining tools currently used in the PyDy workflow are popular scientific
Python packages such as NumPy_, SciPy_, IPython_, and matplotlib_ (i.e. the
SciPy stack) which provide additional code for numerical analyses, simulation,
and visualization.<commit_msg>[readme] Update pypi shield; was broken.<commit_after>====
PyDy
====

.. image:: https://img.shields.io/pypi/dm/pydy.svg
    :target: https://pypi.python.org/pypi/pydy/
    :alt: Latest Version

.. image:: https://travis-ci.org/pydy/pydy.png?branch=master
   :target: https://travis-ci.org/pydy/pydy

PyDy_, short for Python Dynamics, is a tool kit written in the Python
programming language that utilizes an array of scientific programs to enable
the study of multibody dynamics. The goal is to have a modular framework and
eventually a physics abstraction layer which utilizes a variety of backends
that can provide the user with their desired workflow, including:

.. _PyDy: http://pydy.org

- Model specification
- Equation of motion generation
- Simulation
- Visualization
- Publication

We started by building the SymPy_ `mechanics package`_ which provides an API
for building models and generating the symbolic equations of motion for complex
multibody systems and have more recently developed two packages, `pydy.codegen`
and `pydy.viz`, for simulation and visualization of the models, respectively.
The remaining tools currently used in the PyDy workflow are popular scientific
Python packages such as NumPy_, SciPy_, IPython_, and matplotlib_ (i.e. the
SciPy stack) which provide additional code for numerical analyses, simulation,
and visualization.
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