Meet Pygame

Meet Pygame Noah Kantrowitz June 8, 2007

The Basics • Cross-platform • Based on SDL (don’t quote me on that) • Handle input (keyboard, mouse) and output (graphics, audio)

Starting Up • import pygame • pygame.init() • Cue music ...

The Screen • • • •

screen = pygame.display.set_mode((x, y)) screen = pygame.display.get_surface() pygame.display.flip() pygame.display.update(dirty)

Surfaces • The basic element of graphics • pygame.image.load(file) •

.convert_alpha()

vs .set_colorkey((r,g,b))

• dest.blit(src,

(x, y))

Formats • Native support for the following: JPEG TGA

PNG TIF

GIF LBM

BMP PBM

• SVG will need to worked out • Stay tuned ...

PCX XPM

The Loop while True: <event handling>

The Loop while True: <event handling>

Timing • from pygame.time import • clock = Clock() • delta = clock.tick(30)

Clock

The Loop while True: <event handling>

Event Handling for evt in pygame.event.get(): if evt.type == pygame.QUIT: sys.exit() ...

Event Handling • Other types: QUIT

KEYUP

KEYDOWN

MOUSEMOTION

MOUSEBUTTONUP

MOUSEBUTTONDOWN

Key Events • evt.key == pygame.K_a • See the Pygame documentation for the full list of key constants.

Mouse Events

• evt.pos • evt.button

(for the button events)

The Loop while True: <event handling>

Sprites • pygame.sprite.Sprite • class Foo(Sprite): • Must call superclass __init__() • .image, .rect

Groups • pygame.sprite.Group • RenderUpdates, OrderedUpdates • .add(), .remove() • .update(*args) • More on these in a moment

The Loop while True: <event handling>

Drawing • .draw(dest) • Dirty updates • pygame.draw.update(dirty)

Rects •

pygame.Rect(left,top,width,height)

• surf.get_rect() Always at (0,0) • Attributes: top

bottom

left

right

topleft

bottomleft

topright

bottomright

midtop

midbottom

midleft

midright

center

centerx

centery

size

width

height

Collisions • Rect-based

• spritecollide(sprite,group,kill) • spritecollideany(sprite,group)

• groupcollide(group1,group2,kill1,kill2)

Sound • pygame.mixer.Sound(file) • .play(), .stop() • pygame.mixer.music

Text

• Try to avoid it for now.

More?

• http://www.pygame.org/docs • Email me. ([email protected])