pygame.Rect

class pygame.Rect
pygame object for storing rectangular coordinates
Rect(left, top, width, height) -> Rect
Rect((left, top), (width, height)) -> Rect
Rect(object) -> Rect
pygame.Rect.copy copy the rectangle
pygame.Rect.move moves the rectangle
pygame.Rect.move_ip moves the rectangle, in place
pygame.Rect.inflate grow or shrink the rectangle size
pygame.Rect.inflate_ip grow or shrink the rectangle size, in place
pygame.Rect.clamp moves the rectangle inside another
pygame.Rect.clamp_ip moves the rectangle inside another, in place
pygame.Rect.clip crops a rectangle inside another
pygame.Rect.union joins two rectangles into one
pygame.Rect.union_ip joins two rectangles into one, in place
pygame.Rect.unionall the union of many rectangles
pygame.Rect.unionall_ip the union of many rectangles, in place
pygame.Rect.fit resize and move a rectangle with aspect ratio
pygame.Rect.normalize correct negative sizes
pygame.Rect.contains test if one rectangle is inside another
pygame.Rect.collidepoint test if a point is inside a rectangle
pygame.Rect.colliderect test if two rectangles overlap
pygame.Rect.collidelist test if one rectangle in a list intersects
pygame.Rect.collidelistall test if all rectangles in a list intersect
pygame.Rect.collidedict test if one rectangle in a dictionary intersects
pygame.Rect.collidedictall test if all rectangles in a dictionary intersect

Pygame uses Rect objects to store and manipulate rectangular areas. A Rect can be created from a combination of left, top, width, and height values. Rects can also be created from python objects that are already a Rect or have an attribute named “rect”.

Any Pygame function that requires a Rect argument also accepts any of these values to construct a Rect. This makes it easier to create Rects on the fly as arguments to functions.

The Rect functions that change the position or size of a Rect return a new copy of the Rect with the affected changes. The original Rect is not modified. Some methods have an alternate “in-place” version that returns None but effects the original Rect. These “in-place” methods are denoted with the “ip” suffix.

The Rect object has several virtual attributes which can be used to move and align the Rect:

x,y
top, left, bottom, right
topleft, bottomleft, topright, bottomright
midtop, midleft, midbottom, midright
center, centerx, centery
size, width, height
w,h

All of these attributes can be assigned to:

rect1.right = 10
rect2.center = (20,30)

Assigning to size, width or height changes the dimensions of the rectangle; all other assignments move the rectangle without resizing it. Notice that some attributes are integers and others are pairs of integers.

If a Rect has a nonzero width or height, it will return True for a nonzero test. Some methods return a Rect with 0 size to represent an invalid rectangle.

The coordinates for Rect objects are all integers. The size values can be programmed to have negative values, but these are considered illegal Rects for most operations.

There are several collision tests between other rectangles. Most python containers can be searched for collisions against a single Rect.

The area covered by a Rect does not include the right- and bottom-most edge of pixels. If one Rect’s bottom border is another Rect’s top border (i.e., rect1.bottom=rect2.top), the two meet exactly on the screen but do not overlap, and rect1.colliderect(rect2) returns false.

Though Rect can be subclassed, methods that return new rectangles are not subclass aware. That is, move or copy return a new pygame.Rectpygame object for storing rectangular coordinates instance, not an instance of the subclass. This may change. To make subclass awareness work though, subclasses may have to maintain the same constructor signature as Rect.

copy()
copy the rectangle
copy() -> Rect

Returns a new rectangle having the same position and size as the original.

New in pygame 1.9

move()
moves the rectangle
move(x, y) -> Rect

Returns a new rectangle that is moved by the given offset. The x and y arguments can be any integer value, positive or negative.

move_ip()
moves the rectangle, in place
move_ip(x, y) -> None

Same as the Rect.move() method, but operates in place.

inflate()
grow or shrink the rectangle size
inflate(x, y) -> Rect

Returns a new rectangle with the size changed by the given offset. The rectangle remains centered around its current center. Negative values will shrink the rectangle.

inflate_ip()
grow or shrink the rectangle size, in place
inflate_ip(x, y) -> None

Same as the Rect.inflate() method, but operates in place.

clamp()
moves the rectangle inside another
clamp(Rect) -> Rect

Returns a new rectangle that is moved to be completely inside the argument Rect. If the rectangle is too large to fit inside, it is centered inside the argument Rect, but its size is not changed.

clamp_ip()
moves the rectangle inside another, in place
clamp_ip(Rect) -> None

Same as the Rect.clamp() method, but operates in place.

clip()
crops a rectangle inside another
clip(Rect) -> Rect

Returns a new rectangle that is cropped to be completely inside the argument Rect. If the two rectangles do not overlap to begin with, a Rect with 0 size is returned.

union()
joins two rectangles into one
union(Rect) -> Rect

Returns a new rectangle that completely covers the area of the two provided rectangles. There may be area inside the new Rect that is not covered by the originals.

union_ip()
joins two rectangles into one, in place
union_ip(Rect) -> None

Same as the Rect.union() method, but operates in place.

unionall()
the union of many rectangles
unionall(Rect_sequence) -> Rect

Returns the union of one rectangle with a sequence of many rectangles.

unionall_ip()
the union of many rectangles, in place
unionall_ip(Rect_sequence) -> None

The same as the Rect.unionall() method, but operates in place.

fit()
resize and move a rectangle with aspect ratio
fit(Rect) -> Rect

Returns a new rectangle that is moved and resized to fit another. The aspect ratio of the original Rect is preserved, so the new rectangle may be smaller than the target in either width or height.

normalize()
correct negative sizes
normalize() -> None

This will flip the width or height of a rectangle if it has a negative size. The rectangle will remain in the same place, with only the sides swapped.

contains()
test if one rectangle is inside another
contains(Rect) -> bool

Returns true when the argument is completely inside the Rect.

collidepoint()
test if a point is inside a rectangle
collidepoint(x, y) -> bool
collidepoint((x,y)) -> bool

Returns true if the given point is inside the rectangle. A point along the right or bottom edge is not considered to be inside the rectangle.

colliderect()
test if two rectangles overlap
colliderect(Rect) -> bool

Returns true if any portion of either rectangle overlap (except the top+bottom or left+right edges).

collidelist()
test if one rectangle in a list intersects
collidelist(list) -> index

Test whether the rectangle collides with any in a sequence of rectangles. The index of the first collision found is returned. If no collisions are found an index of -1 is returned.

collidelistall()
test if all rectangles in a list intersect
collidelistall(list) -> indices

Returns a list of all the indices that contain rectangles that collide with the Rect. If no intersecting rectangles are found, an empty list is returned.

collidedict()
test if one rectangle in a dictionary intersects
collidedict(dict) -> (key, value)

Returns the key and value of the first dictionary value that collides with the Rect. If no collisions are found, None is returned.

Rect objects are not hashable and cannot be used as keys in a dictionary, only as values.

collidedictall()
test if all rectangles in a dictionary intersect
collidedictall(dict) -> [(key, value), ...]

Returns a list of all the key and value pairs that intersect with the Rect. If no collisions are found an empty dictionary is returned.

Rect objects are not hashable and cannot be used as keys in a dictionary, only as values.