unsigned int ewrite; /* how often to log energy */
int efd; /* fd for energy log */
unsigned int mwrite; /* how often to log momentum */
int mfd; /* fd for momentum log */
unsigned int vwrite; /* how often to visualize atom information */
unsigned int ewrite; /* how often to log energy */
int efd; /* fd for energy log */
unsigned int mwrite; /* how often to log momentum */
int mfd; /* fd for momentum log */
unsigned int vwrite; /* how often to visualize atom information */