#ifndef PartialSpring_H
#define PartialSpring_H

/* Last edited on DATE TIME by USER */

#include <Energy.h>

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

Energy_t PartialSpring_new(void);
  /* Kamada's version has a spring between every @place of knots
    u,v adjacents or not; whose length is equal to the graph-theoretical
    distance between u and v in T. */
  
#endif