.. _secCreateDomDump:


Preparing the domains
#####################

``CreateDomDump`` reads in a simulation snapshot, extracts all leaf cells in a
given domain, and gets their relevant physical properties (e.g. n_HI,
T, ...). A typical parameter file for this is the following. It
contains 4 sections, referring to the main program and three modules
that are used.  

.. code-block:: fortran

	!--------------------------------------------------------------------------------
	[CreateDomDump]
	# input outputs:
	DomDumpDir = directory_where_outputting_files
	repository = directory_where_ramses_outputs_are
	snapnum    = output_number
	reading_method = fullbox
	
	# computational domain parameters
	comput_dom_type      = sphere
	comput_dom_pos       =  0.5, 0.5, 0.5
	comput_dom_rsp       =  0.3
	
	# domain decomposition parameters
	decomp_dom_type      = sphere
	decomp_dom_ndomain   = 1
	decomp_dom_xc        =  0.5
	decomp_dom_yc        =  0.5
	decomp_dom_zc        =  0.5
	decomp_dom_rsp       =  0.32
	
	# miscelaneous :
	verbose    = T
	!--------------------------------------------------------------------------------
	
	!--------------------------------------------------------------------------------
	[mesh]
	verbose = T
	!--------------------------------------------------------------------------------
	
	!--------------------------------------------------------------------------------
	[gas_composition] 
	# mixture parameters
	deut2H_nb_ratio     = 3.000E-05
	f_ion               = 0.01
	Zref                = 0.005   ! OK for LMC dust model.
	# overwrite parameters
	gas_overwrite       = F
	!--------------------------------------------------------------------------------
	
	!--------------------------------------------------------------------------------
	[ramses]
	self_shielding   = F
	ramses_rt        = F
	verbose          = T
	cosmo            = T
	use_initial_mass = F
	use_proper_time  = F
	itemp  = 5
	imetal = 6
	ihii   = 7
	iheii  = 8
	iheiii = 9
	!--------------------------------------------------------------------------------


Once the parameter (say *params_CDD.cfg*) file is edited, one should compile the code with ``make CreateDomDump`` in the rascas/f90 directory, and execute with ``./CreateDomDump params_CDD.cfg``. 



``Createdomdump`` is parallelized with OpenMP

 .. code-block:: bash

     $ export OMP_NUM_THREAD = <n_omp>
     $ ./CreateDomDump params_cdd.cfg

To make sure ``CreateDomDump`` works properly, use ``limit stacksize
unlimited`` before running it interactively.