变量和Surface在Python / Pygame中不会更新

Question

我试图使我的游戏对玩家具有特殊的能力，但存在一些问题。 由于某种原因，第10轮后user_health_active和user_health_display_active不会更新。我不知道为什么会这样，并且已经尝试了大约两个小时。 从表面上看，不仅表面不会更新，而且实际的背景功能也不会更新。 如果有人可以为我提供一些无法解决问题的见解，请告诉我。 这是我的代码。

"""
Game Developer: Austin H.
Game Owner: Austin H.
Licensed Through: theoiestinapps
Build: 2
Version: 1.0.1
"""

import os
import pygame as pygame
import random
import sys
import time

pygame.init()

left = False
right = False
playerDead = False
devMode = False

game_completed = False
game_level_score = (0)
game_display_score = (0)
enemy_speed = (5)

user_teleport_active = False
user_health_active = False
user_teleport_display_active = ("False")
user_health_display_active = ("False")

display_width = 800
display_height = 600

customBlue = (17, 126, 194)
black = (0, 0, 0)
blue = (0, 0, 255)
green = (0, 255, 0)
red = (255, 0, 0)
white = (255, 255, 255)

gameDisplay = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption("Space Dodge")
clock = pygame.time.Clock()

backgroundMusic = pygame.mixer.music.load('C:/Program Files/Space Dodge/game_background_music.mp3')
enemyImg = pygame.image.load('C:/Program Files/Space Dodge/enemy_image.png')
backgroundImg = pygame.image.load('C:/Program Files/Space Dodge/background_image.png')
rocketImg = pygame.image.load('C:/Program Files/Space Dodge/player_image.png')
injuredSound = pygame.mixer.Sound('C:/Program Files/Space Dodge/player_hurt_sound.wav')

def teleport_powerup(user_teleport_display_active):
    font = pygame.font.SysFont(None, 25)
    text = font.render("Teleport Powerup: " + str(user_teleport_display_active), True, red)
    gameDisplay.blit(text, (display_width - 205, 5))
def ehealth_powerup(user_health_display_active):
    font = pygame.font.SysFont(None, 25)
    text = font.render("Ehealth Powerup: " + str(user_health_display_active), True, red)
    gameDisplay.blit(text, (display_width - 205, 25))

def enemies_dodged(enemy_objects_dodged):
    font = pygame.font.SysFont(None, 25)
    text = font.render("Dodge Asteroids: " + str(enemy_objects_dodged), True, green)
    gameDisplay.blit(text, (5, 5))
def game_level(game_display_score):
    font = pygame.font.SysFont(None, 25)
    game_display_score = game_level_score + 1
    text = font.render("Game Level: " + str(game_display_score), True, green)
    gameDisplay.blit(text, (5, 25))
def enemies(enemyx, enemyy, enemyw, enemyh, color):
    pygame.draw.rect(gameDisplay, color, [enemyx, enemyy, enemyw, enemyh])

def rocket(x, y):
    gameDisplay.blit(rocketImg, (x, y))
def background(cen1, cen2):
    gameDisplay.blit(backgroundImg, (cen1, cen2))

def text_objects(text, font):
    textSurface = font.render(text, True, blue)
    return textSurface, textSurface.get_rect() 
def message_display(text):
    global game_completed
    largeText = pygame.font.Font('freesansbold.ttf', 70)
    TextSurf, TextRect = text_objects(text, largeText)
    TextRect.center = ((display_width / 2), (display_height / 2))
    gameDisplay.blit(TextSurf, TextRect)

    pygame.display.update()

    if game_completed == True:
        time.sleep(300)

    else:
        time.sleep(5)
        if game_level_score > 0:
            pass
        else:
            pygame.mixer.music.play()
        game_loop()

def crash():
    injuredSound.play()
    message_display("You Died. Game Over!")

def game_loop():
    global left
    global right
    global playerDead
    global game_level_score
    global enemy_speed
    global game_completed

    global user_teleport_active
    global user_teleport_display_active
    global user_health_active
    global user_health_display_active

    x = (display_width * 0.43)
    y = (display_height * 0.74)
    cen1 = (0)
    cen2 = (0)
    x_change = 0

    rocket_width = (86)
    game_score = (0)
    enemy_objects_dodged = (0)

    enemy_startx = random.randrange(0, display_width)
    enemy_starty = -600
    enemy_width = 100
    enemy_height = 100

    while not playerDead:

        for event in pygame.event.get():

            if event.type == pygame.QUIT:
                pygame.mixer.music.stop()
                playerDead = True

            if devMode == True:
                print(event)

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_a:
                    left = True
                if event.key == pygame.K_d:
                    right = True

                if event.key == pygame.K_LEFT:
                    left = True
                if event.key == pygame.K_RIGHT:
                    right = True

                if event.key == pygame.K_KP4:
                    left = True
                if event.key == pygame.K_KP6:
                    right = True

                if event.key == pygame.K_ESCAPE:
                    playerDead = True

                if event.key == pygame.K_SPACE:
                    game_level_score += 1

            if event.type == pygame.KEYUP:
                if event.key == pygame.K_a or pygame.K_d:
                    left = False
                if event.key == pygame.K_d:
                    right = False

                if event.key == pygame.K_LEFT:
                    left = False
                if event.key == pygame.K_RIGHT:
                    right = False

                if event.key == pygame.K_KP4:
                    left = False
                if event.key == pygame.K_KP6:
                    right = False

                if event.key == pygame.K_SPACE:
                    pass

        if left and right:
            x_change *= 1
        elif left and x > -86:
            x_change = -5
        elif right and x < (display_width - 89):
            x_change = 5
        else:
            x_change = 0

        if game_score == 10:
            enemy_speed += 0.5
            game_level_score += 1

            if game_level_score == 49:
                game_completed = True
                message_display('Game Complete!')

            else:
                message_display('Levels Completed: %s' % game_level_score)

        if game_level_score > 4:
            user_teleport_active = True
            user_teleport_display_active = ("True")
        elif game_level_score > 9:
            user_health_active = True
            user_health_display_active = ("True")

        if user_teleport_active == True:

            if x < -0:
                x = 850

        if enemy_starty > display_height:
            enemy_starty = 0 - enemy_height
            enemy_startx = random.randrange(0, display_width)
            game_score += 1
            enemy_objects_dodged += 1

        if y < enemy_starty + enemy_height:

            if x > enemy_startx and x < enemy_startx + enemy_width or x + rocket_width > enemy_startx and x + rocket_width < enemy_startx + enemy_width:
                pygame.mixer.music.stop()
                game_level_score = (0)
                user_teleport_active = False
                user_teleport_display_active = ("False")
                crash()

        x += x_change

        background(cen1, cen2)
        enemies(enemy_startx, enemy_starty, enemy_width, enemy_height, customBlue)
        enemy_starty += enemy_speed
        rocket(x, y)
        enemies_dodged(enemy_objects_dodged)
        game_level(game_display_score)
        teleport_powerup(user_teleport_display_active)
        ehealth_powerup(user_health_display_active)
        pygame.display.update()
        clock.tick(90)

pygame.mixer.music.set_volume(0.20)
pygame.mixer.music.play(-1)        
game_loop()
pygame.quit()
quit()

Answer 1

修改您提到的变量的代码将永远不会运行。 这是相关的位：

    if game_level_score > 4:
        user_teleport_active = True
        user_teleport_display_active = ("True")
    elif game_level_score > 9:
        user_health_active = True
        user_health_display_active = ("True")

因为您使用的是if和elif ，所以只有在第一个块的条件为false时，才会测试第二个块的条件。 由于任何大于9值也将大于4 ，因此第二个块将永远不会运行。

如果要两个条件独立测试，则只需要对两个条件使用纯if语句。 如果只希望运行一个块，则需要将第一个条件扩展为4 < game_level_score <= 9或者需要更改顺序，以使> 9测试先于> 4测试。