/usr/include/gerris/function.h is in libgfs-dev 20110329-dfsg.2-1build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* Gerris - The GNU Flow Solver
* Copyright (C) 2001 National Institute of Water and Atmospheric Research
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef __FUNCTION_H__
#define __FUNCTION_H__
#define NODATA GFS_NODATA
static double Dirichlet = 1.;
static double Neumann = 0.;
static GfsSimulation * _sim = NULL;
static FttCell * _cell = NULL;
static double dd (const gchar * name, FttComponent c) {
GfsVariable * v = gfs_variable_from_name (GFS_DOMAIN (_sim)->variables, name);
if (v == NULL)
return 0.;
g_return_val_if_fail (_cell != NULL, 0.);
return gfs_dimensional_value (v, gfs_center_gradient (_cell, c, v->i)/
(_sim->physical_params.L*ftt_cell_size (_cell)));
}
static double dx (const gchar * name) { return dd (name, FTT_X); }
static double dy (const gchar * name) { return dd (name, FTT_Y); }
#if !FTT_2D
static double dz (const gchar * name) { return dd (name, FTT_Z); }
#endif /* 3D */
static double area (const gchar * name)
{
GfsVariable * v = gfs_variable_from_name (GFS_DOMAIN (_sim)->variables, name);
if (v == NULL || !GFS_IS_VARIABLE_TRACER_VOF (v))
return 0.;
g_return_val_if_fail (_cell != NULL, 0.);
GfsVariableTracerVOF * t = GFS_VARIABLE_TRACER_VOF (v);
FttVector m, p;
FttComponent c;
for (c = 0; c < FTT_DIMENSION; c++)
(&m.x)[c] = GFS_VALUE (_cell, t->m[c]);
return gfs_plane_area_center (&m, GFS_VALUE (_cell, t->alpha), &p)/
(_sim->physical_params.L*ftt_cell_size (_cell));
}
static double correctness (const gchar * name)
{
GfsVariable * v = gfs_variable_from_name (GFS_DOMAIN (_sim)->variables, name);
if (v == NULL || !GFS_IS_VARIABLE_TRACER_VOF (v))
return 0.;
g_return_val_if_fail (_cell != NULL, 0.);
return gfs_vof_correctness (_cell, GFS_VARIABLE_TRACER_VOF (v));
}
static double distance (double xo, double yo, double zo)
{
/* fixme: this doesn't take mapping into account properly */
GtsPoint o;
o.x = xo; o.y = yo; o.z = zo;
gfs_simulation_map (_sim, (FttVector *) &o.x);
GtsBBox bb;
ftt_cell_bbox (_cell, &bb);
gdouble min, max;
gts_bbox_point_distance2 (&bb, &o, &min, &max);
return sqrt (min)*_sim->physical_params.L;
}
static gboolean is_velocity (GfsVariable * v, GfsDomain * domain)
{
FttComponent c;
GfsVariable ** u = gfs_domain_velocity (domain);
for (c = 0; c < FTT_DIMENSION; c++)
if (v == u[c])
return TRUE;
return FALSE;
}
static void dirichlet_bc (FttCell * cell)
{
cell->flags |= GFS_FLAG_DIRICHLET;
GFS_STATE (cell)->solid->fv = 0.;
}
static double dsd (const gchar * name, FttComponent c)
{
g_return_val_if_fail (_cell != NULL, NODATA);
if (!GFS_IS_MIXED (_cell))
return NODATA;
GfsVariable * v = gfs_variable_from_name (GFS_DOMAIN (_sim)->variables, name);
if (v == NULL)
return NODATA;
if (v->surface_bc)
(* GFS_SURFACE_GENERIC_BC_CLASS (GTS_OBJECT (v->surface_bc)->klass)->bc) (_cell, v->surface_bc);
else if (is_velocity (v, GFS_DOMAIN (_sim)))
dirichlet_bc (_cell);
else /* Neumann */
return 0.;
if ((_cell->flags & GFS_FLAG_DIRICHLET) == 0)
return NODATA;
FttVector g;
gfs_cell_dirichlet_gradient (_cell, v->i, -1, GFS_STATE (_cell)->solid->fv, &g);
return gfs_dimensional_value (v, (&g.x)[c]/(_sim->physical_params.L*ftt_cell_size (_cell)));
}
static double dsx (const gchar * name) { return dsd (name, FTT_X); }
static double dsy (const gchar * name) { return dsd (name, FTT_Y); }
#if !FTT_2D
static double dsz (const gchar * name) { return dsd (name, FTT_Z); }
#endif /* 3D */
static double flux (const gchar * name)
{
g_return_val_if_fail (_cell != NULL, NODATA);
if (!GFS_IS_MIXED (_cell))
return 0.;
GfsVariable * v = gfs_variable_from_name (GFS_DOMAIN (_sim)->variables, name);
if (v == NULL)
return 0.;
if (v->surface_bc)
(* GFS_SURFACE_GENERIC_BC_CLASS (GTS_OBJECT (v->surface_bc)->klass)->bc) (_cell, v->surface_bc);
else if (is_velocity (v, GFS_DOMAIN (_sim)))
dirichlet_bc (_cell);
else /* Neumann */
return 0.;
gdouble flux;
if ((_cell->flags & GFS_FLAG_DIRICHLET) == 0)
flux = GFS_STATE (_cell)->solid->fv;
else {
GFS_STATE (_cell)->solid->v = 1.;
flux = gfs_cell_dirichlet_gradient_flux (_cell, v->i, -1, GFS_STATE (_cell)->solid->fv);
}
return gfs_dimensional_value (v, flux*pow (_sim->physical_params.L*ftt_cell_size (_cell),
FTT_DIMENSION - 2.));
}
#endif /* __FUNCTION_H__ */
|