/home/pedro/work/mdcore/src/part.h

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/*******************************************************************************
 * This file is part of mdcore.
 * Coypright (c) 2010 Pedro Gonnet (pedro.gonnet@durham.ac.uk)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 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 Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 ******************************************************************************/


/* error codes */
#define part_err_ok                     0
#define part_err_null                   -1
#define part_err_malloc                 -2


/* particle flags */
#define part_flag_none                  0
#define part_flag_frozen                1
#define part_flag_ghost                 2


/* default values */


extern int part_err;


struct part {

    FPTYPE x[4] __attribute__ ((aligned (16)));

    FPTYPE v[4] __attribute__ ((aligned (16)));

    FPTYPE f[4] __attribute__ ((aligned (16)));
    
    float q;
    
    int id, vid;
    
    short int type;
    
    unsigned short int flags;
    
    };
    


struct part_type {

    int id;
    
    double mass, imass, charge;
    
    double eps, rmin;
    
    char name[64], name2[64];
    
    };


/* associated functions */
int part_init ( struct part *p , int vid , int type , unsigned int flags );