2. Pygame Animation

from browser import load, document,timer load('../../_static/game.js') load('../../_static/pygame.brython.js') ^^^^ import pygame, sys, time from pygame.locals import * from pygame.color import * # set up the colors BLACK = Color(0,0,0) WHITE = Color(255,255,255) RED = Color(255,0,0) GREEN = Color(0,255,0) BLUE = Color(0,0,255) # set up pygame pygame.init() # set up the window WINDOWWIDTH = 500 WINDOWHEIGHT = 300 windowSurface = pygame.display.set_mode((WINDOWWIDTH,WINDOWHEIGHT),0,32) # set up the direction variables DOWNLEFT = 1 DOWNRIGHT = 3 UPLEFT = 7 UPRIGHT = 9 MOVESPEED = 4 # set up the block data structure b1 = {'rect':pygame.Rect(300,80,50,100),'color':RED,'dir':UPRIGHT} b2 = {'rect':pygame.Rect(200,200,20,20),'color':BLUE,'dir':UPLEFT} b3 = {'rect':pygame.Rect(100,150,60,60),'color':GREEN,'dir':DOWNLEFT} blocks = [b1,b2,b3] def draw(): # draw the black background onto the surface windowSurface.fill(BLACK) for b in blocks: # move the block data structure if b['dir'] == DOWNLEFT: b['rect'].left -= MOVESPEED b['rect'].top += MOVESPEED if b['dir'] == DOWNRIGHT: b['rect'].left += MOVESPEED b['rect'].top += MOVESPEED if b['dir'] == UPLEFT: b['rect'].left -= MOVESPEED b['rect'].top -= MOVESPEED if b['dir'] == UPRIGHT: b['rect'].left += MOVESPEED b['rect'].top -= MOVESPEED # check if the block has moved out of the window if b['rect'].top < 0: # block has moved past the top if b['dir'] == UPLEFT: b['dir'] = DOWNLEFT b['color'] = RED if b['dir'] == UPRIGHT: b['dir'] = DOWNRIGHT b['color'] = RED if b['rect'].bottom > WINDOWHEIGHT: # block has moved past the bottom if b['dir'] == DOWNLEFT: b['dir'] = UPLEFT b['color'] = WHITE if b['dir'] == DOWNRIGHT: b['dir'] = UPRIGHT b['color'] = WHITE if b['rect'].left < 0: # block has moved past the left side if b['dir'] == DOWNLEFT: b['dir'] = DOWNRIGHT b['color'] = GREEN if b['dir'] == UPLEFT: b['dir'] = UPRIGHT b['color'] = GREEN if b['rect'].right > WINDOWWIDTH: # block has moved past the right side if b['dir'] == DOWNRIGHT: b['dir'] = DOWNLEFT b['color'] = BLUE if b['dir'] == UPRIGHT: b['dir'] = UPLEFT b['color'] = BLUE # draw the block onto the surface pygame.draw.rect(windowSurface, b['color'],b['rect']) # draw the window onto the screen pygame.display.update() timer.set_interval(draw,50)

import pygame, sys , time
from pygame.locals import *

# set up pygame
pygame.init()

# set up the window
WINDOWWIDTH = 400
WINDOWHEIGHT = 400
windowSurface = pygame.display.set_mode((WINDOWWIDNTH,WINDOWHEIGHT),0,32)
pygame.display.set_caption('Animation')

# set up the direction variables
DOWNLEFT = 1
DOWNRIGHT = 3
UPLEFT = 7
UPRIGHT = 9

MOVESPEED = 4

# set up the block data structure
b1 = {'rect':pygame.Rect(300,80,50,100),'color':RED,'dir':UPRIGHT}
b2 = {'rect':pygame.Rect(200,200,20,20),'color':BLUE,'dir':UPLEFT}
b3 = {'rect':pygame.Rect(100,150,60,60),'color':GREEN,'dir':DOWNLEFT}
blocks = [b1,b2,b3]

• Note that in the b1, b2, and b3 dictionaries I have embedded objects and directions

• Create a list of blocks with the three dictionaries

while True:
   # check for the QUIT event
   for event in pygame.event.get():
      if event.type == QUIT:
         pygame.quit()
         sys.exit()

   # draw the black background onto the surface
   windowSurface.fill(BLACK)

   for b in blocks:
      # move the block data structure
      if b['dir'] == DOWNLEFT:
         b['rect'].left -= MOVESPEED
         b['rect'].top += MOVESPEED

      if b['dir'] == DOWNRIGHT:
         b['rect'].left += MOVESPEED
         b['rect'].top += MOVESPEED

      # check if the block has moved out of the window
      if b['rect'].top < 0:
         # block has moved past the top
         if b['dir'] == UPLEFT:
            b['dir'] = DOWNLEFT
         if b['dir'] == UPRIGHT:
            b['dir'] = DOWNRIGHT

      if b['rect'].bottom > WINDOWHEIGHT:
         # block has moved past the bottom
         if b['dir'] == DOWNLEFT:
            b['dir'] = UPLEFT
         if b['dir'] == DOWNRIGHT:
            b['dir'] = UPRIGHT

      if b['rect'].left < 0:
         # block has moved past the left side
         if b['dir'] == DOWNLEFT:
            b['dir'] = DOWNRIGHT
         if b['dir'] == UPLEFT:
            b['dir'] = UPRIGHT

      if b['rect'].right > WINDOWWIDTH:
         # block has moved past the right side
         if b['dir'] == DOWNRIGHT:
            b['dir'] = DOWNLEFT
         if b['dir'] == UPRIGHT:
            b['dir'] = UPLEFT

      # draw the block onto the surface
      pygame.draw.rect(windowSurface, b['color'],b['rect'])

   # draw the window onto the screen
   pygame.display.update()
   time.sleep(0.02)

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