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Je suis en train de travailler sur un tuteur de frappe simple en utilisant pygame. Mon problème est que j'utilise une image qui a un fond blanc, waves1.png. Maintenant, j'ai spécifié que je veux que le blanc soit transparent dans l'image (self.image.set_colorkey((255, 255, 255))) et il est pour tout sauf le bloc de texte. Lorsque les ondes se croisent avec l'objet text, le fond blanc des vagues apparaît au-dessus du texte. Vous pouvez essayer d'exécuter ceci si vous avez pygame (à l'exception de l'image waves1.png).problème de rendre l'arrière-plan de l'image transparente: pygame
import pygame
from pygame.locals import *
class TextSprite(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.wordList = ['words yes', 'hello', 'this is a sentence', 'this is another sentence'] # read directly from external file
self.pos = 0
self.wordNum = 0
self.update1()
def update1(self):
# Render the given word
self.image = pygame.font.Font(None, 36).render(self.wordList[self.wordNum], 1, (0, 0, 0))
# Render the correctly guessed letters
self.correct = pygame.font.Font(None, 36).render(self.wordList[self.wordNum][:self.pos], 1, (255, 0, 0))
# Copy correct letters onto given word
self.image.blit(self.correct, (0, 0))
self.rect = self.image.get_rect()
# set the center of the center the given word to the center of the screen
self.rect.center = pygame.display.get_surface().get_rect().center
def keyin(self, key):
word = self.wordList[self.wordNum]
letter = word[self.pos]
if letter == key:
self.pos = self.pos + 1
if self.pos == len(word):
self.reset()
self.update1()
def reset(self):
self.pos = 0
self.wordNum = self.wordNum + 1
self.update1()
class Waves(pygame.sprite.Sprite):
# Constructor. Pass in the color of the block,
# and its x and y position
def __init__(self, filename):
# Call the parent class (Sprite) constructor
pygame.sprite.Sprite.__init__(self)
# Create an image of the block, and fill it with a color.
# This could also be an image loaded from the disk.
self.image = pygame.image.load(filename).convert()
# makes any white in the image transparent
self.image.set_colorkey((255, 255, 255))
self.rect = self.image.get_rect()
# Decrease the y coordinate so the waves look like they're moving up
def update(self, text):
self.rect.y = self.rect.y - 6
if self.rect.y <= 200:
text.reset()
self.rect.y = 485
def main():
#I - Import and initialize
pygame.init()
#D - Display configuration
# The screen variable is a pygame Surface object
# Note that the set_mode() method creates a Surface object for you automatically
screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Typing Game")
#E - Entities (just background for now)
background = pygame.Surface(screen.get_size())
background = background.convert()
background.fill((255, 255, 255))
screen.blit(background, (0,0))
#A - Action (broken into ALTER steps)
#A - Assign values to key variables
clock = pygame.time.Clock()
keepGoing = True
# Collect the sprite in a list
all = pygame.sprite.RenderPlain()
waveList = pygame.sprite.RenderPlain()
text = TextSprite()
all.add(text)
waves = Waves("waves1.png")
waveList.add(waves)
waves.rect.x = 0
waves.rect.y = 485
#L - Set up main loop
while keepGoing:
#T - Timer to set frame rate
# Tick is a method in the Clock class that determines the maximum frame rate
clock.tick(30)
#E - Event handling
for event in pygame.event.get():
if event.type == QUIT:
keepGoing = False
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
keepGoing = False
else:
text.keyin(event.unicode)
# update position of waves
waves.update(text)
# clears screen
all.clear(screen, background)
# update screen
all.draw(screen)
waveList.clear(screen, background)
waveList.draw(screen)
# display.flip is a method that copies everything from the screen object to the actual visual display
pygame.display.flip()
pygame.quit()
if __name__ == '__main__': main()