Graphics and Animation - Invent Your Own Computer Games with Python - page 316

Anti-aliasing can make your text and lines
look blurry but smoother. It takes a little more
computation time to do anti-aliasing, so although
the graphics may look better, your program may
run slower (but only just a little).

Figure 17-4: An aliased line and an anti-aliased line.

Attributes

24. textRect.centerx = windowSurface.get_rect().centerx
25. textRect.centery = windowSurface.get_rect().centery

The pygame.Rect data type (which we will just call Rect for short) makes working
with rectangle-shaped things easy. To create a new Rect object call the function
pygame.Rect() . The parameters are integers for the XY coordinates of the top left
corner, followed by the width and height. These integers are in number of pixels.

The function name with the parameters looks like this: pygame.Rect(left, top,
width, height)

Just like methods are functions that are associated with an object, attributes are
variables that are associated with an object. The Rect data type (that is, the data type of all
Rect objects) has many attributes that describe the rectangle they represent. Here is a list
of attributes of a Rect object named myRect :

pygame.Rect
Attribute

Description

The int value of the X-coordinate of the left side of the
rectangle.

myRect.left

The int value of the X-coordinate of the right side of the
rectangle.

myRect.right

The int value of the Y-coordinate of the top side of the
rectangle.

myRect.top

The int value of the Y-coordinate of the bottom side of the
rectangle.

myRect.bottom

The int value of the X-coordinate of the center of the
rectangle.
The int value of the Y-coordinate of the center of the

myRect.centerx