"""Module where global euler model parameters are set
"""

epsilon = 1.0e-12

default_boundary_tag = 'exterior'


time_format = '%d/%m/%y %H:%M:%S'

min_timestep = 1.0e-6 #Should be computed based on geometry
max_timestep = 1000


v_max = 100 #For use in domain_ext.c
sound_speed = 500

max_smallsteps = 50  #Max number of degenerate steps allowed b4 trying first order



#Betas [0;1] control the allowed steepness of gradient for second order
#extrapolations. Values of 1 allow the steepes gradients while
#lower values are more conservative. Values of 0 correspond to
#1'st order extrapolations.
#
# Large values of beta_h may cause simulations to require more timesteps
# as surface will 'hug' closer to the bed.
# Small values of beta_h will make code faster, but one may experience
# artificial momenta caused by discontinuities in water depths in
# the presence of steep slopes. One example of this would be
# stationary water 'lapping' upwards to a higher point on the coast.
#
#
#
#There are separate betas for the w-limiter and the h-limiter
#
#
#
#
#Good values are:
#beta_w = 0.9
#beta_h = 0.2



beta = 0.9

CFL = 1.0  #FIXME (ole): Is this in use yet??
           #(Steve) yes, change domain.CFL to
           #make changes


pmesh_filename = '.\\pmesh'


import os, sys

if sys.platform == 'win32':
    #default_datadir = 'C:\grohm_output'
    default_datadir = '.'
else:
    #default_datadir = os.path.expanduser('~'+os.sep+'grohm_output')
    default_datadir = '.'


use_extensions = True    #Try to use C-extensions
#use_extensions = False   #Do not use C-extensions

use_psyco = True  #Use psyco optimisations
#use_psyco = False  #Do not use psyco optimisations


optimised_gradient_limiter = True #Use hardwired gradient limiter

#Specific to Euler
minimum_allowed_density = 1.0e-3 #Water depth below which it is considered to be 0