不可预知的敌人速度变化

Question

我做了一个游戏，敌人追逐一个玩家，而玩家通过地图收集硬币。当我在空闲状态下运行它时，它工作正常，但是当我将它作为一个应用程序(使用auto-py-to-exe)运行时，敌方的移动会随机地changed..now，它们正以非常高的速度移动。我不确定错误可能出在哪里。我发现更改屏幕大小或添加一条print语句也会以某种方式影响这一点。你能给我一个解释吗？.我是pygame的新手，大部分的游戏都是一块一块地看文档。

这是我的完整代码

import sys, pygame,time
import numpy as np
import math

pygame.init()

size = width, height = 410,310

screen = pygame.display.set_mode(size)
screen.set_colorkey((255,255,255))
pygame.display.set_caption('Game')


player = pygame.Surface((68,72))
player.set_colorkey((0,0,0))

bg=pygame.image.load("vf.jpg").convert_alpha()
bg.set_colorkey((255,255,255))
bgrect = bg.get_rect()

ash=pygame.image.load("ash.png").convert_alpha()
ashrect = ash.get_rect()
ashrect.x,ashrect.y=205,155
ashrect.w,ashrect.h=10,10

en1=pygame.image.load("charmander.png").convert_alpha()
en1rect = en1.get_rect()
en1rect.x,en1rect.y=500,200
en1rect.w,en1rect.h=10,10

en2=pygame.image.load("squirtle.png").convert_alpha()
en2rect = en2.get_rect()
en2rect.x,en2rect.y=500,700
en2rect.w,en2rect.h=10,10

en3=pygame.image.load("bulbasaur.png").convert_alpha()
en3rect = ash.get_rect()
en3rect.x,en3rect.y=100,500
en3rect.w,en3rect.h=10,10

poke=pygame.image.load("poke.png").convert_alpha()
pokerect = poke.get_rect()
pokerect.x,pokerect.y=100,100


score=0


x,y=0,0

def enSpeed(enx,eny,asx,asy,bs):

    if asx==enx and asy==eny:
        return [0,0]
    else:
        dirvect=pygame.math.Vector2(asx-enx,asy-eny)
        
        if dirvect.magnitude()<=200 or not bgrect.collidepoint((enx,eny)):
            dirvect.normalize_ip()
            dirvect.scale_to_length(5)
            spd=pygame.math.Vector2(dirvect[0]-bs[0],dirvect[1]-bs[1])
            spd.scale_to_length(5)
            return spd
        else:
            print("test print")
            
            return [-bs[0],-bs[1]]

    
bgspd=[0,0]


while 1:
    
    keys=pygame.key.get_pressed()
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
            pygame.mixer.music.stop()


        if bgrect.colliderect(ashrect):
            if keys[pygame.K_d]:
                bgspd=[10,0]
                bgrect.move_ip([-10,0])
                pokerect.move_ip([-10,0]) 
                player.fill((0,0,0))
                x,y=-1,-2
            if keys[pygame.K_a]:
                bgspd=[-10,0]
                bgrect.move_ip([10,0])
                pokerect.move_ip([10,0])
                player.fill((0,0,0))
                x,y=-1,-1
            if keys[pygame.K_s]:
                bgspd=[0,10]
                bgrect.move_ip([0,-10])
                pokerect.move_ip([0,-10])
                player.fill((0,0,0))
                x,y=-1,0
            if keys[pygame.K_w]:
                bgspd=[0,-10]
                bgrect.move_ip([0,10])
                pokerect.move_ip([0,10])
                player.fill((0,0,0))
                x,y=-3,-3
        
            if event.type==pygame.KEYUP:
               x+=1
               bgspd=[0,0]
           
            if pokerect.colliderect(ashrect):
                pokerect.x=np.random.randint(bgrect.x,bgrect.x+900)
                pokerect.y=np.random.randint(bgrect.y,bgrect.y+1100)
                score+=1

            if en1rect.colliderect(ashrect) or en2rect.colliderect(ashrect)or en3rect.colliderect(ashrect) :
                gameOver()
                
        else:
            gameOver()
            
        if en1rect.colliderect(en2rect):
            en1rect.move_ip([np.random.randint(-100,100),np.random.randint(-100,100)])
            en2rect.move_ip([np.random.randint(-100,100),np.random.randint(-100,100)])
            
        if en2rect.colliderect(en3rect):
            en3rect.move_ip([np.random.randint(-100,100),np.random.randint(-100,100)])
            en2rect.move_ip([np.random.randint(-100,100),np.random.randint(-100,100)])
            
        if en3rect.colliderect(en1rect):
            en3rect.move_ip([np.random.randint(-100,100),np.random.randint(-100,100)])
            en1rect.move_ip([np.random.randint(-100,100),np.random.randint(-100,100)])
    
    en1rect.move_ip(enSpeed(en1rect.x,en1rect.y,ashrect.x,ashrect.y,bgspd))
    en2rect.move_ip(enSpeed(en2rect.x,en2rect.y,ashrect.x,ashrect.y,bgspd))
    en3rect.move_ip(enSpeed(en3rect.x,en3rect.y,ashrect.x,ashrect.y,bgspd))

    screen.blit(bg,bgrect)
    player.blit(ash,(68*x,72*y))
    screen.blit(player,(205,155))
    screen.blit(poke,pokerect)
    screen.blit(en1,en1rect)
    screen.blit(en2,en2rect)
    screen.blit(en3,en3rect)
    screen.blit(pygame.font.Font.render(ft,"SCORE: "+str(score),True,(255,255,255)),dest=(200,0))
    pygame.display.flip()

游戏的粗略描述是，玩家可以在地图上向任何方向移动，收集弹珠(硬币)来赢得score.If玩家在敌人的范围内，敌人将开始追赶玩家，否则当玩家被抓住或玩家离开背景地图时，敌人仍然是stationary.The游戏结束。

Answer 1

您的代码当前正在以最快的速度运行。你必须限制你游戏的速度(FPS)。游戏中的FPS (每秒帧数)通常设置为60。幸运的是，这在pygame中很容易做到。

import pygame
from sys import exit

FPS = 60    
clock = pygame.time.Clock()

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

   clock.tick(FPS)