Chroma Prerequisites

• http://chroma.bitbucket.org/install/details.html

Difficult hardware and software requirements, lots of pre-requisites.

• Are they all really, really needed ?
• what are they for ?

Software

From http://chroma.bitbucket.org/install/details.html

1. Python 2.6 or later
2. CUDA 4.1 Toolkit and NVIDIA driver.
3. Boost::Python
4. Numpy 1.6 or later
5. Pygame
6. Matplotlib
7. uncertainties
8. PyCUDA 2011.2 or later
9. PyUblas
10. ZeroMQ
11. GEANT4.9.5 or later
    • non-cmake 4.9.4 mentioned in setup.py
    • DYB currently at geant4.9.2.p01 see Geant4 Release Notes
12. Patched version of g4py
13. ROOT 5.32 or later
    • DYB currently at root_v5.26.00e ROOT Release Notes

uncertainties

Derivative based error propagation.

• http://pythonhosted.org/uncertainties/index.html
• http://pythonhosted.org/uncertainties/user_guide.html

simon:chroma blyth$ find . -name '*.*' -exec grep -l uncertainties {} \;
./chroma/benchmark.py
./chroma/histogram/histogram.py
./chroma/histogram/histogramdd.py
./chroma/likelihood.py
./chroma/parabola.py
./setup.py
./test/test_parabola.py

pycuda

• http://documen.tician.de/pycuda/

pyublas

• http://documen.tician.de/pyublas/

PyUblas provides a seamless glue layer between Numpy and Boost.Ublas for use with Boost.Python

• http://www.boost.org/doc/libs/1_54_0/libs/numeric/ublas/doc/index.htm
• http://www.netlib.org/blas/

BLAS : Basic Linear Algebra Subprograms

simon:chroma blyth$ find . -name '*.*' -exec grep -l pyublas {} \;
./chroma/generator/g4gen.py    # imported but unused here ?
./doc/source/chroma-setup.py
./doc/source/chroma-setup.sh
./setup.py
./src/G4chroma.cc

src/G4chroma.cc

118 #include <boost/python.hpp>
119 #include <pyublas/numpy.hpp>
120
121 using namespace boost::python;
122
123 pyublas::numpy_vector<double> PTA_GetX(const PhotonTrackingAction *pta)
124 {
125   pyublas::numpy_vector<double> r(pta->GetNumPhotons());
126   pta->GetX(&r[0]);
127   return r;
128 }

pygame

Python layer ontop of SDL, used for GUI and “game” control.

Pygame is implemented as a mixture of Python, C and Assembler code, wrapping 3rd party libraries with CPython API interfaces.

• http://www.pygame.org/news.html
• https://bitbucket.org/pygame/pygame
• http://en.wikipedia.org/wiki/Pygame

simon:chroma blyth$ pwd
/usr/local/env/muon_simulation/chroma/muon_simulation/chroma
simon:chroma blyth$ find . -name '*.py' -exec grep -l pygame {} \;
./chroma/__init__.py    # does not insist on pygame available
./chroma/camera.py      # used for GUI, keyboard event handling
./doc/source/chroma-setup.py    # brittle yum/apt/pip/cmake based installer for most everything
./setup.py

spnav

The spnav module provides a Python interface to the libspnav C library, which allows you to read events from a Space Navigator 3D mouse on Linux systems. These input devices simultaneously report linear force and rotational torque applied by the user to the device, along with button events. See:

• http://spnav.readthedocs.org/en/latest/
• https://pypi.python.org/pypi/spnav
• http://www.3dconnexion.com/products/spacenavigator.html

pyzmq

Underlying ZeroMQ is now auto-built by the python setup.py installation, no longer need pyzmq-static.

• https://pypi.python.org/pypi/pyzmq/
• https://pypi.python.org/pypi/pyzmq-static/