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The structure Point_type

This is the C definition of the structure:

typedef struct point_type {
  unsigned char type; /* Type of the point, e.g. (exact meaning can vary; See modules)
                         0 : regular point;
                         1 : point in the image's border;
                         2 : T-junction;
                         3 : Tau-junction;
                         4 : X-junction;
                         5 : Y-junction.
  struct point_type *previous; /* Pointer to the previous point (may be NULL) */
  struct point_type *next; /* Pointer to the next point (may be NULL) */
} *Point_type;

mw 2004-05-05