# 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

# automagically create output directory
ActiveThorns = "IOUtil"
IO::out_dir = $parfile
IO::parfile_write = "no"

ActiveThorns = "Carpet CarpetLib"
driver::ghost_size = 3
driver::global_nx = 31
driver::global_ny = 31
driver::global_nz = 31

ActiveThorns = "CartGrid3D CoordBase SymBase"
grid::avoid_origin = "false"
grid::type = "byspacing"
grid::dxyz = 0.2

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 CarpetInterp CarpetReduce AHFinderDirect"

AHFinderDirect::print_timing_stats = "true"

AHFinderDirect::h_base_file_name              = "h"
AHFinderDirect::BH_diagnostics_base_file_name = "BH_diagnostics"
AHFinderDirect::output_OpenDX_control_files   = "no"
AHFinderDirect::Theta_norm_for_convergence = 1.0e-12

AHFinderDirect::geometry_interpolator_name = "Lagrange polynomial interpolation"
AHFinderDirect::geometry_interpolator_pars = "order=4"

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

AHFinderDirect::desired_value[1] = 0.02