仅在拖动游戏窗口时才绘制对象

时间:2019-05-10 14:05:27

标签: python pygame

我正在尝试使用pygame在Python中重新创建Agar.io。到目前为止,我已经能够在某种程度上模拟玩家的动作,但是后来我尝试使用pygame.time.set_timer()方法在给定的间隔内生成一些“食物单元”,尽管其余的游戏元素都是在绘制这些食物单元(例如屏幕和播放器)时,只有在我拖动游戏窗口时才绘制(并添加到“ food_list”列表中)。我认为这可能是我不真正知道如何处理事件队列的问题。

main.py,这是游戏循环所在的位置:

import sys, pygame
from player import Player
from food import Food
import random
pygame.init()

SCREEN_SIZE = [1024, 768]
WHITE = (255, 255 , 255)
generate_food = pygame.USEREVENT + 1

screen = pygame.display.set_mode(SCREEN_SIZE)
screen.fill(WHITE)

player = Player()
food_list = []

## TODO: Make a separate GameScreen class.
## TODO: Make a list of constants

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        if event.type == generate_food:
            food_x = random.randrange(0, 760)
            food_y = random.randrange(0, 1000)
            food_list.append(Food(food_x, food_y))

    pygame.time.set_timer(generate_food, 200)
    screen.fill(WHITE)

    for f in food_list:
        f.draw(screen)

    player.update()
    player.draw(screen)
    pygame.display.flip()

food.py:

import pygame
import random
from cell import Cell

DARK_GREEN = (0, 102, 0)

class Food(Cell):
    def __init__(self, x, y):
        super().__init__()
        self.size = 2
        self.image = pygame.Surface([2, 2])
        self.image.fill(DARK_GREEN)
        self.rect = self.image.get_rect()
        self.x = x
        self.y = y

    def draw(self, screen):
        pygame.draw.circle(screen, DARK_GREEN, (self.x, self.y), self.size, 0)

    def getX(self):
        return self.x

    def getY(self):
        return self.y

1 个答案:

答案 0 :(得分:0)

实际上定时器是在应用循环中不断重启的。但是,pygame.time.set_timer() 会生成一个计时器,该计时器会在事件队列中重复创建 USEREVENT。因此,在应用程序循环之前启动一次计时器就足够了:

pygame.time.set_timer(generate_food, 200)          # <--- ADD

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        if event.type == generate_food:
            food_x = random.randrange(0, 760)
            food_y = random.randrange(0, 1000)
            food_list.append(Food(food_x, food_y))

    # pygame.time.set_timer(generate_food, 200)      <--- DELTE