#ifndef SimpleSpring_H
#define SimpleSpring_H

/* Last edited on DATE TIME by USER */

#include <Energy.h>

typedef struct SimpleSpring_data_t 
{
  double length;   /* desirable length of a single @{edge->?} in the display plane */
} SimpleSpring_data_t;

Energy_t SimpleSpring_new(void);
  /* The {spring} energy is computing assuming that every @{edge->?} is a one
    elasticity wire that to pull or to push the extremal knots with
    tension that depend of discrepancy between the "current" length of
    @{edge->?} and their "referencial" or "nominal" length. */
  
#endif