Namespace: Box.Systems
Represents a 2D rectangle used for pixel detection, collision, area calculations, and other utility methods.
public Rect2(Rect2 value);
public Rect2(Vect2 position, Vect2 size);
public Rect2(float x, float y, float width, float height);
Deep-clones an existing rectangle.
| Name |
Type |
Description |
Empty |
Rect2 |
(0,0,0,0) empty rectangle |
One |
Rect2 |
(0,0,1,1) unit rectangle |
| Name |
Type |
Description |
float X |
float |
X-coordinate of top-left corner |
float Y |
float |
Y-coordinate of top-left corner |
float Width |
float |
Width of the rectangle |
float Height |
float |
Height of the rectangle |
float Top |
float |
Same as Y
|
float Left |
float |
Same as X
|
float Right |
float |
X + Width |
float Bottom |
float |
Y + Height |
bool IsEmpty |
bool |
True if width or height ≤ 0 |
Vect2 Center |
Vect2 |
Center point (X + Width/2, Y + Height/2)
|
Vect2 Position |
Vect2 |
Gets/sets top-left corner as a Vect2 (clamps both) |
Vect2 Size |
Vect2 |
Gets/sets (Width, Height) as a Vect2
|
| Operator |
Description |
==, !=
|
Equality/Inequality by (X, Y, Width, Height)
|
+ Vect2, - Vect2
|
Expand/shrink by vector |
<, >, <=, >= |
Compare areas |
| Signature |
Description |
float Area() / static float Area(Rect2 rect)
|
Computes area (Width * Height). |
Rect2 Expand(float w, float h) / static Rect2 Expand(Rect2 r, float w, float h)
|
Expands or shrinks edges by (w, h). |
bool Contains(float x, float y) / Contains(Vect2 p)
|
Point-in-rect test |
bool Intersects(Rect2 other) / static bool Intersects(Rect2 a, Rect2 b)
|
Rect-rect intersection |
Rect2 Merge(Rect2 other) / static Rect2 Merge(Rect2 a, Rect2 b)
|
Encompasses both rectangles |
// create at (10,20), size 100x50
var rect = new Rect2(10, 20, 100, 50);
// move it
rect.Position = new Vect2(50, 75);
// expand by 5 pixels each side
var expanded = rect + new Vect2(5);
// check if a point lies within
bool inside = rect.Contains(60, 80);
// compute area and intersection
float area = rect.Area();
var other = new Rect2(new Vect2(40,60), new Vect2(20,20));
bool hit = rect.Intersects(other);
// merge two rectangles
auto union = Rect2.Merge(rect, other);