This is a complex simulation example showing how to run event simulation using the AMPT event generator interface from AliRoot.
A wrapper class AliRoot_AMPT is defined to keep the AliGenAmpt instance and configure it.
It also provides methods to set a random event plane before event generation and to update the event header.
The overall setup is steered by the function ampt(double energy = 5020., double bMin = 0., double bMax = 20.) defined in the macro aliroot_ampt.macro.
The macro file is specified via --configKeyValues setting GeneratorExternal.fileName whereas the specific function call to retrieven the configuration is specified via GeneratorExternal.funcName.
To run this example you need to load an AliRoot package compatible with the O2. for more details, https://alice.its.cern.ch/jira/browse/AOGM-246
AliRoot needs to be loaded after O2 in the following sense:
alienv enter O2/latest,AliRoot/latest
The other order may show unresolved symbol problems.
The physics output of this simulation is not fully tested and validated.