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# This parameter file sets up Kerr/Kerr-Schild initial data, then
# finds the apparent horizon in it. The local coordinate system origin
# and the initial guess are both deliberately de-centered with respect
# to the black hole, to make this a non-trivial test for the apparent
# horizon finder.
# flesh
cactus::cctk_itlast = 0
########################################
#
# ***** output setup (also see below for more output stuff) *****
#
ActiveThorns = "IOUtil IOBasic"
IOUtil::parfile_write = "no"
IO::out_dir = $parfile
########################################
#
# basic grid setup
#
ActiveThorns = "Carpet CarpetLib CarpetInterp CarpetReduce"
Carpet::domain_from_coordbase = true
ActiveThorns = "SymBase Boundary"
ActiveThorns = "CoordBase"
CoordBase::domainsize = "minmax"
CoordBase::xmin = -3.0 # specify full domain for "new" symmetries
CoordBase::xmax = +3.0
CoordBase::ymin = -3.0
CoordBase::ymax = +3.0
CoordBase::zmin = 0.0 # specify active domain for "old" symmetries
CoordBase::zmax = +3.0
CoordBase::dx = 0.2
CoordBase::dy = 0.2
CoordBase::dz = 0.2
#
# ghost zones
#
driver::ghost_size_x = 2
driver::ghost_size_y = 2
driver::ghost_size_z = 2
# ghost zones are outside the nominal grid
CoordBase::boundary_internal_x_lower = false
CoordBase::boundary_internal_x_upper = false
CoordBase::boundary_internal_y_lower = false
CoordBase::boundary_internal_y_upper = false
CoordBase::boundary_internal_z_lower = false
CoordBase::boundary_internal_z_upper = false
# ghost zone widths
CoordBase::boundary_size_x_lower = 2
CoordBase::boundary_size_x_upper = 2
CoordBase::boundary_size_y_lower = 2
CoordBase::boundary_size_y_upper = 2
CoordBase::boundary_size_z_lower = 2
CoordBase::boundary_size_z_upper = 2
# ghost zones start 0.5 point outside nominal grid boundary
CoordBase::boundary_shiftout_x_lower = 0
CoordBase::boundary_shiftout_x_upper = 0
CoordBase::boundary_shiftout_y_lower = 0
CoordBase::boundary_shiftout_y_upper = 0
CoordBase::boundary_shiftout_z_lower = 0
CoordBase::boundary_shiftout_z_upper = 0
# staggered grids everywhere
CoordBase::boundary_staggered_x_lower = true
CoordBase::boundary_staggered_x_upper = true
CoordBase::boundary_staggered_y_lower = true
CoordBase::boundary_staggered_y_upper = true
CoordBase::boundary_staggered_z_lower = true
CoordBase::boundary_staggered_z_upper = true
# octant symmetry
ActiveThorns = "ReflectionSymmetry"
ReflectionSymmetry::avoid_origin_x = true
ReflectionSymmetry::avoid_origin_y = true
ReflectionSymmetry::avoid_origin_z = true
ReflectionSymmetry::reflection_x = true
ReflectionSymmetry::reflection_y = true
ReflectionSymmetry::reflection_z = false # CartGrid3D will take care of
# this reflection symmetry
ActiveThorns = "CartGrid3D"
CartGrid3D::type = "CoordBase"
Grid::domain = "bitant"
########################################
#
# Kerr initial data
#
ActiveThorns = "ADMBase ADMCoupling StaticConformal CoordGauge SpaceMask Exact"
ADMBase::initial_lapse = "exact"
ADMBase::initial_shift = "exact"
ADMBase::initial_data = "exact"
ADMBase::lapse_evolution_method = "static"
ADMBase::shift_evolution_method = "static"
ADMBase::metric_type = "physical"
Exact::exact_model = "Kerr/Kerr-Schild"
Exact::Kerr_KerrSchild__mass = 1.0
Exact::Kerr_KerrSchild__spin = 0.6
########################################
ActiveThorns = "SphericalSurface"
ActiveThorns = "AEILocalInterp AHFinderDirect"
AHFinderDirect::print_timing_stats = "true"
AHFinderDirect::verbose_level = "algorithm highlights"
AHFinderDirect::output_Theta_every = 1
AHFinderDirect::h_base_file_name = "Kerr.h"
AHFinderDirect::Theta_base_file_name = "Kerr.Theta"
AHFinderDirect::N_horizons = 1
AHFinderDirect::origin_x[1] = 0.5
AHFinderDirect::origin_y[1] = 0.7
AHFinderDirect::origin_z[1] = 0.0
AHFinderDirect::initial_guess_method[1] = "coordinate sphere"
AHFinderDirect::initial_guess__coord_sphere__x_center[1] = -0.2
AHFinderDirect::initial_guess__coord_sphere__y_center[1] = 0.3
AHFinderDirect::initial_guess__coord_sphere__z_center[1] = 0.0
AHFinderDirect::initial_guess__coord_sphere__radius[1] = 2.0
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