如何清除阿爾法精靈圖片動畫的舊圖像

Question

我的初學者在pygame開發，當我更新我的精靈圖片圖像時，舊圖像仍然存在於表面。

如何清除表面？

main.py

FPS = 10 

try: 
    import sys 
    import random 
    import math 
    import os 
    import getopt 
    import pygame 
    from socket import * 
    from pygame.locals import * 
    from player import * 
except ImportError as err: 
    print("Couldn't load module. {}".format(err)) 
    sys.exit(2) 

pygame.init() 
fps_clock = pygame.time.Clock() 

screen = pygame.display.set_mode((600, 600)) 

game_surface = pygame.Surface(screen.get_size()) 
game_surface.fill((250,250,250)) 
game_surface_image = pygame.image.load("data/landscape.jpg").convert() 
game_surface.convert() 

p = Player() 
player_surface = pygame.Surface((p.SPRITE_WIDTH, p.SPRITE_HEIGHT), pygame.SRCALPHA) 

# --------------------------------------------------------------- 
# MAIN LOOP ----------------------------------------------------- 
# --------------------------------------------------------------- 

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

    screen.fill((250,250,250)) 

    pygame.display.set_caption("FPS: {:.2f}".format(fps_clock.get_fps())) 

    p.animation() 

    player_surface.blit(p.image, (0,0), p.rect) 
    game_surface.blit(game_surface_image, (0,0)) 
    game_surface.blit(player_surface, (screen.get_rect().centerx - p.SPRITE_WIDTH/2, screen.get_rect().centery - p.SPRITE_HEIGHT/2)) 
    screen.blit(game_surface, (0,0)) 
    pygame.display.update() 


    fps_clock.tick(FPS) 

player.py

import pygame 
from pygame.locals import * 

class Player(pygame.sprite.Sprite): 

    SPRITE_HEIGHT = 110 
    SPRITE_WIDTH = 60 
    SPRITE_QTY = 8 
    SPRITE_NAME = "data/player_sprite.png" 

    __ANIMATION_INTERVAL = 12 
    __ANIMATION_COUNT = 0 
    __SPRITE_POSITION = 0 

    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = pygame.image.load(self.SPRITE_NAME).convert_alpha() 
     self.rect = (0, 0, self.SPRITE_WIDTH, self.SPRITE_HEIGHT) 

    def animation(self): 
     if self.__ANIMATION_COUNT == self.__ANIMATION_INTERVAL: 
      self.__ANIMATION_COUNT = 0 
      if self.__SPRITE_POSITION < self.SPRITE_QTY - 1: 
       self.__SPRITE_POSITION += 1 
      else: 
       self.__SPRITE_POSITION = 0 
      self.rect = Rect(self.SPRITE_WIDTH * self.__SPRITE_POSITION, 0, self.SPRITE_WIDTH * self.__SPRITE_POSITION + self.SPRITE_WIDTH, self.SPRITE_HEIGHT) 
     else: 
      self.__ANIMATION_COUNT += 1 

Answer 1

問題就出在這行： player_surface.blit(p.image, (0,0), p.rect)

播放器圖像在舊圖像上再次閃爍。需要先清除player_surface。

添加player_surface.fill(BLANK_ALPHA)與BLANK_ALHPA = (0, 0, 0, 0)應該做的伎倆。

player_surface.fill(BLANK_ALPHA) 
player_surface.blit(p.image, (0,0), p.rect)