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pygame_001.py
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pygame_001.py
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import pygame, sys, time
from pygame.locals import *
pygame.init()
WINDOWWIDTH = 200
WINDOWHEIGHT = 300
screen = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT), 0, 32)
pygame.display.set_caption('Animation')
DOWNLEFT = 1
DOWNRIGHT = 3
UPLEFT = 7
UPRIGHT = 9
MOVESPEED = 1
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)
b1 = {'rect':pygame.Rect(0, 50, 25, 25), 'color':RED, 'dir':DOWNRIGHT}
b2 = {'rect':pygame.Rect(0, 100, 25, 25), 'color':GREEN, 'dir':DOWNRIGHT}
b3 = {'rect':pygame.Rect(0, 150, 25, 25), 'color':BLUE, 'dir':DOWNRIGHT}
blocks = [b1, b2, b3]
while True:
# check for the closing of the 'x' button
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
screen.fill(BLACK)
pygame.draw.line(screen,BLUE,(150,0),(150,150),5)
for b in blocks:
#moves the blocks
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 move 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
if b['dir'] == UPLEFT or b['dir'] == DOWNLEFT: # In this case it's rather easy to check for the exact conditions when direction changes should be made. Being the movement speed is only 1, at some point the b['rect'].right/left will be exactly 150. It's easier to check for that than deal with greater than less than problems which tend to only work for one way. If movement was higher than one you'd have to switch to short ranges instead.
if b['rect'].left == 150 and b['rect'].top > 0 and b['rect'].top < 150:
if b['dir'] == DOWNLEFT:
b['dir'] = DOWNRIGHT
if b['dir'] == UPLEFT:
b['dir'] = UPRIGHT
if b['dir'] == DOWNRIGHT or b['dir'] == UPRIGHT:
if b['rect'].right == 150 and b['rect'].top < 150:
if b['dir'] == DOWNRIGHT:
b['dir'] = DOWNLEFT
if b['dir'] == UPRIGHT:
b['dir'] = UPLEFT
print(b['rect'].right)
pygame.draw.rect(screen, b['color'], b['rect'])
pygame.display.update()
time.sleep(0.00001)