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// AHFinderDirect.hh -- misc global-within-this-thorn stuff
// $Header$
//******************************************************************************
// number of spatial dimensions in the main Cactus grid
// and in our trial-horizon-surface grid
enum { N_GRID_DIMS = 3, N_HORIZON_DIMS = 2 };
//
// This structure holds various information about the interpolator
// used to interpolate the "geometry" Cactus 3-D gridfns ($g_{ij}$ and
// $K_{ij}$) to the apparent horizon position.
//
struct geometry_interpolator_info
{
int operator_handle; // Cactus handle to interpolation op
int param_table_handle; // Cactus handle to parameter table
// for the interpolator
};
//
// This structure holds all the information we need about the Cactus grid
// and gridfns outside the top-level driver. At present we use
// CCTK_InterpLocalUniform()
// to access the Cactus gridfns, and much of this information is specific
// to that API.
//
struct cactus_grid_info
{
cGH *GH; // --> Cactus grid hierarchy
// Cactus coordinate system
fp coord_origin[N_GRID_DIMS]; // (x,y,z) of grid posn (0,0,0)
fp coord_delta[N_GRID_DIMS]; // (x,y,z) grid spacing
// dimensions of gridfn data, viewed as a 3-D array
// n.b. storage ordering is Fortran,
// i.e. i is contiguous, j has stride Ni, k has stride Ni*Nj
CCTK_INT gridfn_dims[N_GRID_DIMS];
// --> Cactus gridfn data for grid posn (0,0,0)
const fp* g_dd_11_data;
const fp* g_dd_12_data;
const fp* g_dd_13_data;
const fp* g_dd_22_data;
const fp* g_dd_23_data;
const fp* g_dd_33_data;
const fp* K_dd_11_data;
const fp* K_dd_12_data;
const fp* K_dd_13_data;
const fp* K_dd_22_data;
const fp* K_dd_23_data;
const fp* K_dd_33_data;
};
//******************************************************************************
//
// prototypes for functions visible outside their source files
//
// driver.cc
extern "C"
void AHFinderDirect_driver(CCTK_ARGUMENTS);
// horizon_function.cc
void horizon_function(patch_system& ps,
const struct cactus_grid_info& cgi,
const struct geometry_interpolator_info& gii);
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