gp_bbox.h File Reference

A bounding box implementation. More...

#include <core/gp_types.h>
#include <core/gp_common.h>

Go to the source code of this file.

Data Structures
struct	gp_bbox
	A bounding box. More...

Macros
#define	GP_BBOX_FMT   "[%i, %i] w=%u h=%u"
	A bounding box printf format string.
#define	GP_BBOX_PARS(bbox)   (bbox).x, (bbox).y, (bbox).w, (bbox).h
	A bounding box printf parameters.

Typedefs
typedef struct gp_bbox	gp_bbox
	A bounding box.

Functions
static int	gp_bbox_empty (gp_bbox box)
	Returns true if bounding box is empty.
static gp_bbox	gp_bbox_pack (gp_coord x, gp_coord y, gp_coord w, gp_coord h)
	Creates a bounding box from coordinates and size.
static gp_bbox	gp_bbox_merge (gp_bbox box1, gp_bbox box2)
	Merges two bounding boxes.
static gp_bbox	gp_bbox_intersection (gp_bbox box1, gp_bbox box2)
	Calculates a bounding box intersection.
static int	gp_bbox_intersects (gp_bbox box1, gp_bbox box2)
	Returns true if bouding boxes intersects.
static gp_bbox	gp_bbox_move (gp_bbox box, gp_coord x, gp_coord y)
	Moves bounding box.

Detailed Description

A bounding box implementation.

Definition in file gp_bbox.h.

Function Documentation

gp_bbox_empty()

static int gp_bbox_empty ( gp_bbox  box )

inlinestatic

Returns true if bounding box is empty.

Returns

Returns true on empty bounding box.

Definition at line 39 of file gp_bbox.h.

References gp_bbox::h, and gp_bbox::w.

Referenced by gp_widget_ops_blit().

gp_bbox_intersection()

static gp_bbox gp_bbox_intersection ( gp_bbox  box1, gp_bbox  box2  )

inlinestatic

Calculates a bounding box intersection.

Parameters

box1	First bounding box.
box2	Second bounding box.

Returns

An intersection of two bounding boxes.

Definition at line 94 of file gp_bbox.h.

References GP_MAX, GP_MIN, gp_bbox::h, gp_bbox::w, gp_bbox::x, and gp_bbox::y.

gp_bbox_intersects()

static int gp_bbox_intersects ( gp_bbox  box1, gp_bbox  box2  )

inlinestatic

Returns true if bouding boxes intersects.

Parameters

box1	First bounding box.
box2	Second bounding box.

Returns

True if bounding boxes intersects.

Definition at line 114 of file gp_bbox.h.

References gp_bbox::h, gp_bbox::w, gp_bbox::x, and gp_bbox::y.

gp_bbox_merge()

static gp_bbox gp_bbox_merge ( gp_bbox  box1, gp_bbox  box2  )

inlinestatic

Merges two bounding boxes.

Parameters

box1	First bounding box.
box2	Second bounding box.

Returns

A bounding box that contains both bounding boxes.

Definition at line 74 of file gp_bbox.h.

References GP_MAX, GP_MIN, gp_bbox::h, gp_bbox::w, gp_bbox::x, and gp_bbox::y.

Referenced by gp_widget_ops_blit().

gp_bbox_move()

static gp_bbox gp_bbox_move ( gp_bbox  box, gp_coord  x, gp_coord  y  )

inlinestatic

Moves bounding box.

Parameters

box	A bounding box.
x	An offset to move by in horizontal direction.
y	An offset to move by in vertical direction.

Returns

A bounding box moved by x, y.

Definition at line 140 of file gp_bbox.h.

References gp_bbox_pack(), gp_bbox::h, gp_bbox::w, gp_bbox::x, and gp_bbox::y.

gp_bbox_pack()

static gp_bbox gp_bbox_pack ( gp_coord  x, gp_coord  y, gp_coord  w, gp_coord  h  )

inlinestatic

Creates a bounding box from coordinates and size.

Parameters

x	A bounding box left x coordinate.
y	A bounding box top y coordinate.
w	A bounding box width.
h	A bounding box height.

Returns

A gp_bbox initialized from the parameters.

Definition at line 54 of file gp_bbox.h.

References gp_bbox::x.

Referenced by gp_bbox_move(), and gp_widget_ops_blit().