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/* $Header$ */
#include <assert.h>
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"
void SphericalSurfaceInfo_Setup (CCTK_ARGUMENTS)
{
DECLARE_CCTK_ARGUMENTS;
DECLARE_CCTK_PARAMETERS;
CCTK_REAL const pi = 3.1415926535897932384626433832795028841971693993751;
int n;
for (n=0; n<nsurfaces; ++n) {
/* internal consistency checks */
assert (nghoststheta[n] >= 0 && nghoststheta[n] <= maxnghoststheta);
assert (nghostsphi[n] >= 0 && nghostsphi[n] <= maxnghostsphi);
assert (ntheta[n] >= 3*nghoststheta[n] && ntheta[n] <= maxntheta);
assert (nphi[n] >= 3*nghostsphi[n] && nphi[n] <= maxnphi);
/* coordinates in the theta direction */
/* avoid_sf_origin_theta = 1 */
if (symmetric_z[n]) {
/* upper hemisphere: z>=0, theta in (0, pi/2) */
sf_delta_theta[n] = pi/2 / (ntheta[n] - 2*nghoststheta[n] - 0.5);
sf_origin_theta[n] = - (nghoststheta[n] - 0.5) * sf_delta_theta[n];
} else {
/* both hemispheres: theta in (0, pi) */
sf_delta_theta[n] = pi / (ntheta[n] - 2*nghoststheta[n]);
sf_origin_theta[n] = - (nghoststheta[n] - 0.5) * sf_delta_theta[n];
}
/* coordinates in the phi direction */
/* avoid_sf_origin_phi = 0 */
if (symmetric_x[n]) {
if (symmetric_y[n]) {
/* one quadrant: x>=0, y>=0, phi in [0, pi/2] */
assert (nphi[n] - 2*nghostsphi[n] >= 1);
sf_delta_phi[n] = pi/2 / (nphi[n] - 2*nghostsphi[n] - 1);
sf_origin_phi[n] = - nghostsphi[n] * sf_delta_phi[n];
} else {
/* two quadrants: x>=0, phi in [-pi/2, pi/2] */
assert (nphi[n] - 2*nghostsphi[n] >= 2);
sf_delta_phi[n] = pi / (nphi[n] - 2*nghostsphi[n] - 1);
sf_origin_phi[n] = - pi/2 - nghostsphi[n] * sf_delta_phi[n];
}
} else {
if (symmetric_y[n]) {
/* two quadrants: y>=0, phi in [0, pi] */
assert (nphi[n] - 2*nghostsphi[n] >= 2);
sf_delta_phi[n] = pi / (nphi[n] - 2*nghostsphi[n] - 1);
sf_origin_phi[n] = - nghostsphi[n] * sf_delta_phi[n];
} else {
/* all quadrants: phi in [0, 2pi) */
assert (nphi[n] - 2*nghostsphi[n] >= 4);
sf_delta_phi[n] = 2*pi / (nphi[n] - 2*nghostsphi[n]);
sf_origin_phi[n] = - nghostsphi[n] * sf_delta_phi[n];
}
}
}
}
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