问题描述
我想在屏幕上显示“Obstacle”类的每个对象。对象存储在列表obstacle_list
中。我没有收到错误消息,但窗口只是冻结,屏幕上没有显示任何对象。我认为问题一定出在 def spawn_obstacle(self):
中,但我不知道我在哪里犯了错误。
import pygame
import random
import time
import math
# Initialize pygame
pygame.init()
# Create window (width,height)
screen = pygame.display.set_mode(((800,600)))
ScreenHeight = screen.get_height()
ScreenWidth = screen.get_width()
# Background picture
background = pygame.image.load("background.jpg")
# Title and Icon
pygame.display.set_caption("F22-Raptor Simulator")
icon = pygame.image.load("jet1.png")
pygame.display.set_icon(icon)
# Object List (obstacles)
obstacle_list = []
class Obstacle(object):
def __init__(self): # removed unused parameters
self.obstacleImg = 'rock.png' # pygame.image.load("rock.png")
self.obstacleX = random.randint(600,700)
self.obstacleY = random.randint(0,ScreenHeight - 64)
self.obstacleX_change = random.uniform(-0.3,-0.2)
def __repr__(self):
return f'Obstacle(image={self.obstacleImg!r},X={self.obstacleX},Y={self.obstacleY},change={self.obstacleX_change})'
def spawn_obstacle(self):
image = pygame.image.load(self.obstacleImg)
screen.blit(image,(self.obstacleX,self.obstacleY))
# Keep window running (Infinite-Loop)
running = True
# Timer
timer1_start = time.time()
timer1_current = 0
# Counter while-loop to display objects
count_object_display = 0
# While-Loop (Everything that takes place during the game is inside here)
while running:
timer1_current = time.time()
if timer1_current - timer1_start >= 1:
timer1_start = time.time() # Timer of start set to current time
obstacle = Obstacle() # Create instance of class obstacle
obstacle_list.append(obstacle)
print(obstacle)
# Insert Background
screen.blit(background,(0,0))
# End game / close window
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
while count_object_display <= len(obstacle_list)-1:
obstacle_list[count_object_display].spawn_obstacle()
count_object_display += 1
if count_object_display > len(obstacle_list)-1:
count_object_display = 0
# Update after each iteration of the while-loop
pygame.display.update()
解决方法
这里有一个无限循环:
while count_object_display <= len(obstacle_list)-1:
obstacle_list[count_object_display].spawn_obstacle()
count_object_display += 1
if count_object_display > len(obstacle_list)-1:
count_object_display = 0
您进入 while 循环并将 count_object_display
设置为 1
。
在下一行中,1 > 0
使您将 count_object_display
重新设置为 0
。
从 0 <= 0
开始,while 循环将永远运行。
我不知道你想在那里做什么,但也许只是使用一个简单的 for
循环,比如:
for o in obstacle_list:
o.spawn_obstacle()