Rect2

Rect2 is a 2D axis-aligned rectangle structure defined by a position and size. It is used extensively for collision detection, viewport calculations, UI layout, and spatial partitioning.

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Fields

Field	Type	Description
Position	Vect2	The position (top-left corner) of the rectangle
Size	Vect2	The size (width and height) of the rectangle

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Properties

Property	Description
X	The X-coordinate of the rectangle's position
Y	The Y-coordinate of the rectangle's position
Width	The width of the rectangle
Height	The height of the rectangle
Top	The Y-coordinate of the top edge
Left	The X-coordinate of the left edge
Right	The X-coordinate of the right edge
Bottom	The Y-coordinate of the bottom edge
Center	The center point of the rectangle
TopLeft	The top-left corner of the rectangle
TopRight	The top-right corner of the rectangle
BottomLeft	The bottom-left corner of the rectangle
BottomRight	The bottom-right corner of the rectangle
Empty	An empty rectangle with position (0,0) and size (0,0)
IsEmpty	Returns true if the rectangle has zero size

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Constructors

// Create from position and size
var rect1 = new Rect2(new Vect2(10f, 20f), new Vect2(100f, 50f));

// Create from component values
var rect2 = new Rect2(10f, 20f, 100f, 50f);

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Contains

Determines whether a point or rectangle is inside the rectangle.

var rect = new Rect2(10f, 20f, 100f, 50f);
var point = new Vect2(50f, 30f);

bool contains = rect.Contains(point);  // true

var other = new Rect2(20f, 30f, 50f, 20f);
bool containsRect = rect.Contains(other);  // true

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Intersects

Determines whether two rectangles intersect.

var rect1 = new Rect2(10f, 10f, 50f, 50f);
var rect2 = new Rect2(30f, 30f, 50f, 50f);

bool intersects = rect1.Intersects(rect2);  // true

Circle Intersection

Determines whether the rectangle intersects with a circle.

var rect = new Rect2(10f, 10f, 50f, 50f);
var center = new Vect2(35f, 35f);
float radius = 20f;

bool intersects = rect.Intersects(center, radius);  // true

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Intersection

Gets the intersection rectangle between two rectangles.

var rect1 = new Rect2(10f, 10f, 50f, 50f);
var rect2 = new Rect2(30f, 30f, 50f, 50f);

var intersection = rect1.Intersection(rect2);  // (30, 30, 30, 30)

Circle Intersection

Gets the intersection rectangle between a rectangle and a circle.

var rect = new Rect2(10f, 10f, 50f, 50f);
var center = new Vect2(35f, 35f);
float radius = 20f;

var intersection = rect.Intersection(center, radius);
// Returns the overlapping region between the rectangle and circle

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Union

Gets the smallest rectangle that contains both rectangles.

var rect1 = new Rect2(10f, 10f, 50f, 50f);
var rect2 = new Rect2(30f, 30f, 50f, 50f);

var union = rect1.Union(rect2);  // (10, 10, 70, 70)

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Inflate

Expands the rectangle by a specified amount on all sides.

var rect = new Rect2(10f, 20f, 100f, 50f);
var inflated = rect.Inflate(5f);  // (5, 15, 110, 60)

var inflated2 = rect.Inflate(5f, 10f);  // (5, 10, 110, 70)

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Offset

Offsets the rectangle by a specified vector.

var rect = new Rect2(10f, 20f, 100f, 50f);
var offset = rect.Offset(new Vect2(5f, -5f));  // (15, 15, 100, 50)

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Move

Moves the rectangle to a new position while maintaining its size.

var rect = new Rect2(10f, 20f, 100f, 50f);
var moved = rect.Move(new Vect2(50f, 50f));  // (50, 50, 100, 50)

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Area

Calculates the area of the rectangle.

var rect = new Rect2(10f, 20f, 100f, 50f);
float area = rect.Area();  // 5000

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Summary

Method	Description
Contains	Determines if a point or rectangle is inside
Intersects	Determines if two rectangles intersect
Intersects(center, radius)	Determines if rectangle intersects with a circle
Intersection	Returns the intersection rectangle
Intersection(center, radius)	Returns intersection between rectangle and circle
Union	Returns the union rectangle
Inflate	Expands the rectangle by an amount
Offset	Offsets the rectangle by a vector
Move	Moves the rectangle to a new position
Area	Calculates the area of the rectangle

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