NAME

SYNOPSIS

#include <agar/core.h>
#include <agar/gui.h>

DESCRIPTION

typedef struct ag_rect {
	int x, y;
	int w, h;
} AG_Rect;

The alternate AG_Rect2 structure also stores the two endpoints explicitely:

typedef struct ag_rect2 {
	int x1, y1;
	int w, h;
	int x2, y2;
} AG_Rect2;

INTERFACE

AG_Rect2
AG_RECT2(int x, int y, int w, int h);

AG_Rect
AG_ReadRect(AG_DataSource *ds);

AG_Rect2
AG_ReadRect2(AG_DataSource *ds);

void
AG_WriteRect(AG_DataSource *ds, AG_Rect r);

void
AG_WriteRect2(AG_DataSource *ds, AG_Rect2 r);

AG_Rect
AG_Rect2ToRect(AG_Rect2 r);

AG_Rect2
AG_RectToRect2(AG_Rect r);

AG_Rect
AG_RectIntersect(const AG_Rect *a, const AG_Rect *b);

AG_Rect2
AG_RectIntersect2(const AG_Rect2 *a, const AG_Rect2 *b);

int
AG_RectInside(const AG_Rect *r, int x, int y);

int
AG_RectInside2(const AG_Rect2 *r, int x, int y);

int
AG_RectCompare(const AG_Rect *a, const AG_Rect *b);

int
AG_RectCompare2(const AG_Rect2 *a, const AG_Rect2 *b);

void
AG_RectSize(AG_Rect *r, int w, int h);

void
AG_RectSize2(AG_Rect2 *r, int w, int h);

void
AG_RectTranslate(AG_Rect *r, int x, int y);

void
AG_RectTranslate2(AG_Rect2 *r, int x, int y);

The AG_RECT() routine returns an AG_Rect structure initialized to the given coordinates x, y and dimensions w, h. The AG_RECT2() variant returns an AG_Rect2.

The AG_ReadRect() function loads a rectangle from the given AG_DataSource(3). AG_WriteRect() writes a rectangle to a data source.

The AG_RectToRect2() and AG_Rect2ToRect() routines convert between the AG_Rect and AG_Rect2 formats.

AG_RectIntersect() and AG_RectIntersect2() return intersection of rectangles a and b.

AG_RectInside() and AG_RectInside() return 1 if the point x, y lies inside of rectangle r.

The AG_RectCompare() and AG_RectCompare2() routines return 0 if both rectangles possess the same coordinates and dimensions.

The AG_RectSize() and AG_RectSize2() routines resize a rectangle to the specified dimensions.

AG_RectTranslate() and AG_RectTranslate2() translate a rectangle by the specified amount.

SEE ALSO

HISTORY