Game Development Reference
In-Depth Information
17 - Graphics and Animation
myRect.centery rectangle.
myRect.width The int value of the width of the rectangle.
myRect.height The int value of the height of the rectangle.
myRect.size A tuple of two ints: (width, height)
myRect.topleft A tuple of two ints: (left, top)
myRect.topright A tuple of two ints: (right, top)
myRect.bottomleft A tuple of two ints: (left, bottom)
myRect.bottomright A tuple of two ints: (right, bottom)
myRect.midleft
A tuple of two ints: (left, centery)
myRect.midright
A tuple of two ints: (right, centery)
myRect.midtop
A tuple of two ints: (centerx, top)
myRect.midbottom
A tuple of two ints: (centerx, bottom)
The great thing about Rect objects is that if you modify any of these variables, all the
other variables will automatically modify themselves as well. For example, if you create a
Rect object that is 20 pixels wide and 20 pixels high, and has the top left corner at the
coordinates (30, 40), then the X-coordinate of the right side will automatically be set to 50
(because 20 + 30 = 50). However, if you change the left attribute with the line
myRect.left = 100 , then Pygame will automatically change the right attribute to
120 (because 20 + 100 = 120). Every other attribute for that Rect object will also be
updated as well.
The get_rect() Methods for pygame.font.Font
and pygame.Surface Objects
Notice that both the Font object (stored in the text variable) and the Surface object
(stored in windowSurface variable) both have a method called get_rect() .
Technically, these are two different methods. But the programmers of Pygame gave them
the same name because they both do the same thing and return Rect objects that represent
the size and position of the Font or Surface object.
Also, remember that pygame is a module that we import, and inside the pygame
module are the font and surface modules. Inside those modules are the Font and
Surface data types. The Pygame programmers made the modules begin with a lowercase
letter, and the data types begin with an uppercase letter. This makes it easier to distinguish
the data types and the modules that the data types can be found in.
Constructor Functions and the type() function.
We create a pygame.Rect object by calling a function named pygame.Rect() . The
pygame.Rect() function has the same name as the pygame.Rect data type.
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