/* Line.h 
	Line class
  Original code: JM, 29 Oct 97
*/

#ifndef LINE_H
#define LINE_H

#include "Point.h"

typedef struct line *Line;

Line ConsLine( Point p1, Point p2 );
/* Construct a line from its endpoints  
   Pre-cond: (p1 != NULL) && (p2 != NULL)
   Post-cond: returns a valid line or NULL if no memory
*/

void DeleteLine( Line l );
/* Delete l and free resources 
   Pre-cond: l != NULL
*/

Point StartPoint( Line l );
Point EndPoint( Line l );
/* Projectors 
   Pre-cond: l != NULL 
*/


#endif