78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
#ifndef __POLYGON_H__
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#define __POLYGON_H__
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#include <stdlib.h>
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#include "Figure.h"
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typedef struct Polygon
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{
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struct Polygon_vtable
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{
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/* derived from Object */
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const char* (*type) ();
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struct Polygon* (*clone) (const struct Polygon *this);
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void (*destroy) (struct Polygon *this);
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/* derived from Figure */
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void (*draw) (const struct Polygon *this);
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double (*area) (const struct Polygon *this);
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/* Polygon virtual methods */
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double (*max_diag) (const struct Polygon *this);
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} *vtable;
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/* Polygon fields */
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size_t npoints;
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struct point
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{
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double x, y;
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} *points;
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} Polygon;
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Polygon* Polygon_new (const struct point *points, size_t npoints);
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static inline const char* Polygon_type (const Polygon *this)
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{
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return this->vtable->type ();
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}
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static inline Polygon* Polygon_clone (const Polygon *this)
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{
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return this->vtable->clone (this);
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}
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static inline void Polygon_destroy (Polygon *this)
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{
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this->vtable->destroy (this);
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}
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static inline void Polygon_draw (const Polygon *this)
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{
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this->vtable->draw (this);
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}
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static inline double Polygon_area (const Polygon *this)
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{
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return this->vtable->area (this);
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}
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static inline double Polygon_max_diag (const Polygon *this)
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{
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return this->vtable->max_diag (this);
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}
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/* considered to be protected */
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void Polygon_constructor (Polygon *this, const struct point *points, size_t npoints);
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void Polygon_destructor (Polygon *this);
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void Polygon_copy (Polygon *dest, const Polygon *src);
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void __Polygon_draw (const Polygon *this);
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double __Polygon_area (const Polygon *this);
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double __Polygon_max_diag (const Polygon *this);
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#endif // __POLYGON_H__
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