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The structure Polygons

This is the C definition of the structure:

typedef struct polygons {
  char cmt[mw_cmtsize]; /* Comments */
  char name[mw_namesize]; /* Name of the set */
  Polygon first;    /* Pointer to the first polygon */
} *Polygons;

If polygons is of Polygons memory type, then polygons->first is of Polygon memory type and it is the first polygon of the set; therefore, polygons->first->first is the first point of the first polygon. polygons->first->next is the second polygon, etc. The end of the set occurs when the next field of a polygon is NULL.



mw 2004-05-05