92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
#include "Rhomb.h"
|
|
|
|
/* considered to be protected */
|
|
void Rhomb_constructor (Rhomb *this, const struct point *points)
|
|
{
|
|
Polygon_constructor ((Polygon *) this, points, 4);
|
|
}
|
|
|
|
void Rhomb_destructor (Rhomb *this)
|
|
{
|
|
Polygon_destructor ((Polygon *) this);
|
|
}
|
|
|
|
void Rhomb_copy (Rhomb *dest, const Rhomb *src)
|
|
{
|
|
Polygon_copy ((Polygon *) dest, (Polygon *) src);
|
|
}
|
|
|
|
/* private */
|
|
static const char* __Rhomb_type ()
|
|
{
|
|
return "Rhomb";
|
|
}
|
|
|
|
static Rhomb* __Rhomb_clone (const Rhomb *this)
|
|
{
|
|
Rhomb *rhomb = malloc (sizeof (Rhomb));
|
|
memset (rhomb, 0, sizeof (Rhomb));
|
|
Rhomb_copy (rhomb, this);
|
|
return rhomb;
|
|
}
|
|
|
|
static void __Rhomb_destroy (Rhomb *this)
|
|
{
|
|
Rhomb_destructor (this);
|
|
free (this);
|
|
}
|
|
|
|
static void __Rhomb_draw (const Rhomb *this)
|
|
{
|
|
__Polygon_draw ((Polygon *) this);
|
|
}
|
|
|
|
static double __Rhomb_area (const Rhomb *this)
|
|
{
|
|
return __Polygon_area ((Polygon *) this);
|
|
}
|
|
|
|
static double __Rhomb_max_diag (const Rhomb *this)
|
|
{
|
|
return __Polygon_max_diag ((Polygon *) this);
|
|
}
|
|
|
|
static int __Rhomb_is_square (const Rhomb *this)
|
|
{
|
|
double diag1, diag2, tmp1, tmp2;
|
|
|
|
tmp1 = this->points[0].x - this->points[2].x;
|
|
tmp2 = this->points[0].y - this->points[2].y;
|
|
diag1 = tmp1 * tmp1 + tmp2 * tmp2;
|
|
|
|
tmp1 = this->points[1].x - this->points[3].x;
|
|
tmp2 = this->points[1].y - this->points[3].y;
|
|
diag2 = tmp1 * tmp1 + tmp2 * tmp2;
|
|
|
|
return (diag1 == diag2);
|
|
}
|
|
|
|
/* public */
|
|
Rhomb* Rhomb_new (const struct point *points)
|
|
{
|
|
static struct Rhomb_vtable vtable = {
|
|
__Rhomb_type,
|
|
__Rhomb_clone,
|
|
__Rhomb_destroy,
|
|
__Rhomb_draw,
|
|
__Rhomb_area,
|
|
__Rhomb_max_diag,
|
|
__Rhomb_is_square
|
|
};
|
|
|
|
Rhomb *rhomb = malloc (sizeof (Rhomb));
|
|
memset (rhomb, 0, sizeof (Rhomb));
|
|
Rhomb_constructor (rhomb, points);
|
|
rhomb->vtable = &vtable;
|
|
return rhomb;
|
|
}
|