我如何在碰撞时重生

Question

我一直在与敌人一起制作一个简单的收藏游戏，但我不知道如何在与之相撞后将收藏品产生在随机位置。就像在玩家与硬币相撞的许多硬币收集器游戏中一样，它在另一个位置产卵，并且有一个得分系统，我尝试了很多次，但失败了。请帮忙！这是我的代码：

#import some libraries
import sys
import random
import pygame
from pygame import mixer


pygame.init()
mixer.init()
pygame.font.init()
width = 1440
height = 810
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption('test')
collectible_img = pygame.image.load('img/collectible.png')
pygame.display.set_icon(collectible_img)
white = (255, 255, 255)
intro = pygame.mixer.Sound('sfx/intro.ogg')
gameplay = pygame.mixer.Sound('sfx/gameplay.ogg')
coll_audio = pygame.mixer.Sound('sfx/cool.ogg')
screen_rect = screen.get_rect()
score = 0
txt = pygame.font.SysFont("Britannic Bold", 40)
class Player(pygame.sprite.Sprite):

    def __init__(self):
        super().__init__()
        self.image = pygame.image.load('img/player.png')
        self.rect = self.image.get_rect()
        self.x = 300
        self.y = 640
        self.speed = 10

    def keyboard(self, keys):
        if keys[pygame.K_UP]:
            self.y -= self.speed
        if keys[pygame.K_DOWN]:
            self.y += self.speed
        if keys[pygame.K_RIGHT]:
            self.x += self.speed
        elif keys[pygame.K_LEFT]:
            self.x -= self.speed
    def update(self):
        self.rect.topleft = self.x, self.y


class Collectible(pygame.sprite.Sprite):

    def __init__(self):
        super().__init__()
        self.image = pygame.image.load('img/collectible.png')
        self.rect = self.image.get_rect()
        self.x = 200
        self.y = 100

    def update(self):
        self.rect.topleft = self.x, self.y
class Enemy(pygame.sprite.Sprite):

    def __init__(self):
        super().__init__()
        self.image = pygame.image.load('img/enemy.png')
        self.rect = self.image.get_rect()
        self.movementx = random.randrange(10, 50)
        self.movementy = random.randrange(10, 50)
        self.x = 900
        self.y = 500
    def update(self):
        self.rect.topleft = self.x, self.y
def play_screen(end_it, cutscence):
    while (end_it == False):
        screen.fill(white)
        intro.play(0)
        bg = pygame.image.load('img/splashscreen.png')
        font = pygame.font.SysFont("Britannic Bold", 40)
        label = font.render("test", 1, (255, 0, 0))
        for event in pygame.event.get():
            if event.type == pygame.MOUSEBUTTONDOWN:
                end_it = True
                intro.stop()
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
                gameplay.stop()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:
                    pygame.quit()
                    sys.exit()
                    gameplay.stop()
                    intro.stop()
        screen.blit(bg, (0, 0))
        pygame.display.flip()
    while (cutscence == False): 
        coll_audio.play(0)
        test2 = pygame.image.load('img/player.png')
        screen.fill((0, 0, 0))
        text = font.render("Click to continue", 1, (255, 255, 255))
        for event in pygame.event.get():
            if event.type == pygame.MOUSEBUTTONDOWN:
                cutscence = True
                coll_audio.stop()
                gameplay.play(0)
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:
                    pygame.quit()
                    sys.exit()
        screen.blit(text, (50, 50))
        screen.blit(test2, (500, 500))
        pygame.display.flip()

def play_again():
    player = Player()
    collectible = Collectible()
    enemy = Enemy()
    all_sprites = pygame.sprite.Group(player, collectible, enemy)
    collectibles = pygame.sprite.Group(collectible)
    enemies = pygame.sprite.Group(enemy)
    pos = pygame.mouse.get_pos()
    global score
    clock = pygame.time.Clock()
    running = True
    end_it = False
    game = False
    cutscence = False
    end_screen = False
    exit_screen = False
    while running:
        while (exit_screen == True):
            font = pygame.font.SysFont("Britannic Bold", 40)
            exit_img = pygame.image.load('img/death.png')
            for event in pygame.event.get():
                if event.type == pygame.MOUSEBUTTONDOWN:
                    exit_screen = False
                    gameplay.play()
                    play_again()
                if event.type == pygame.QUIT:
                    exit_screen = False
                    pygame.quit()
                    sys.exit()
                elif event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_ESCAPE:
                        exit_screen = False
                        pygame.quit()
                        sys.exit()
            screen.blit(exit_img, (0, 0))
            pygame.display.flip()
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:
                    running = False
                    sys.exit()
        keys = pygame.key.get_pressed()
        player.keyboard(keys)
        all_sprites.update()
        global collided_collectibles
        collided_collectibles = pygame.sprite.spritecollide(player, collectibles, True)
        for collided_collectible in collided_collectibles:
            print('Collision.')
            score += 1
        collided_enemies = pygame.sprite.spritecollide(player, enemies, False)
        for collided_enemy in collided_enemies:
            exit_screen = True
            score *= 0
            gameplay.stop()
        screen.fill((255, 255, 255))
        score_counter = txt.render("Score: " + str(score), 1, (0, 0, 0))
        screen.blit(score_counter, (0, 0))
        all_sprites.draw(screen)
        pygame.display.flip()
        clock.tick(30)

play_screen(False, False)
play_again()
pygame.quit()
sys.exit()

Answer 1

我认为问题在于您将类collectible的产卵坐标进行了硬化。您可以制作一个小功能，该功能在屏幕的宽度和高度范围内生成一个随机数，并在创建类的新实例时作为参数传递。

随机产卵坐标的功能：

import random
def spawn_random():
    spawn_x = random.randint(0, 1440)
    spawn_y = random.randint(0,810)
    return spawn_x, spawn_y # returns a tuple, e.g (200, 400)

您的同类需要一些一些更改：

class Collectible(pygame.sprite.Sprite):
    def __init__(self, xy_spawn):
        super().__init__()
        self.image = pygame.image.load('img/collectible.png')
        self.x, self.y = xy_spawn
        self.rect = self.image.get_rect(topleft=(self.x, self.y))

首次创建一个实例collectible = collectible（（（200,100），您可以使用您喜欢生成的开始坐标，之后，每次收集都应再次产生（碰撞或任何其他事件）

collectible = Collectible(spawn_random())