##### https://github.com/geodynamics/citcoms
Tip revision: 1465476
``````/*
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
*
* CitcomS by Louis Moresi, Shijie Zhong, Lijie Han, Eh Tan,
* Clint Conrad, Michael Gurnis, and Eun-seo Choi.
* Copyright (C) 1994-2005, California Institute of Technology.
*
* This program is free software; you can redistribute it and/or modify
* 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
*
*
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include "element_definitions.h"
#include "global_defs.h"

void set_cg_defaults(E)
struct All_variables *E;
{ void assemble_forces_iterative();
void solve_constrained_flow_iterative();
void cg_allocate_vars();

E->build_forcing_term =   assemble_forces_iterative;
E->solve_stokes_problem = solve_constrained_flow_iterative;
E->solver_allocate_vars = cg_allocate_vars;

return;
}

void cg_allocate_vars(E)
struct All_variables *E;
{
/* Nothing required ONLY by conj-grad stuff  */
/* printf("here here\n"); */

return;

}

void assemble_forces_iterative(E)
struct All_variables *E;
{
int i;

void assemble_forces();
void strip_bcs_from_residual();

assemble_forces(E,0);

strip_bcs_from_residual(E,E->F,E->mesh.levmax);

return;

}
``````