如何通过PyGame2.5让两个独立的图像互相追逐和跟踪？

Question

我用25个左右的Python对每个屏幕进行编码。一个是猫，另一个是老鼠。我可以让他们互相追逐，但他们不走同一条路。我该怎么做才能让他们互相跟踪，最终可能让猫吃掉炭鼠标，然后让程序结束呢？这是我的代码：

#Agustin Loomis
#'Cat & Mouse Chaser Game'
#Last Modification 4/20/14
#Cat char chases Mouse char

import pygame #import essentials
import sys
from pygame.locals import*

pygame.init() #initialize pygame
#color setup
white = (255,255,255)
black = (0,0,0)
red = (255, 0 , 0)
green = (0, 255, 0)
blue = (0, 0, 255)
yellow = (255, 255, 0)
cyan = (0,255,255)
purple = (255, 0 , 255)
FPS = 30 #assign Frame Per Second to the value of 30
fpsTime = pygame.time.Clock() #assign 'fpsTime' to pygame time clock

setDisplay = pygame.display.set_mode((500,500)) #set the display screen to 500, 500
pygame.display.set_caption('Cat & Mouse Chaser Game')

imgCat = pygame.image.load('include/NyanCat.jpg') #load img for the char cat
imgx1 = 0 #assign img coordinates
imgy1 = 10

imgMouse = pygame.image.load('include/run-with-the-mice.gif') #load imf for the Mouse char
imgx2 = 10 #assign img coordinates
imgy2 = 200

pixChange = 5 #assign variable pixel change to value of 5
movement = 'down' #assign movement constant to down

while True: #while true set display screen to black
    setDisplay.fill(black) 

    if movement == 'down':
        imgy1 += pixChange
        imgy2 += pixChange
        if imgy1 > 400:
            movement = 'right'
        if imgy2 > 400:
            movement = 'right'

    elif movement == 'right':
        imgx1 += pixChange
        imgx2 += pixChange
        if imgx1 > 400:
            movement = 'up'
        if imgx2 > 400:
            movement = 'up'

    elif movement == 'up':
        imgy1 -= pixChange
        imgy2 -= pixChange
        if imgy1 < 10:
            movement = 'left'
        if imgy2 < 10:
            movement = 'left'

    elif movement == 'left':
        imgx1 -= pixChange
        imgx2 -= pixChange
        if imgx1 < 40:
            movement = 'down'
        if imgx2 < 40:
            movement = 'down'









    setDisplay.blit(imgCat, (imgx1,imgy1))
    setDisplay.blit(imgMouse, (imgx2, imgy2))
    for event in pygame.event.get():
        print event
        if event.type == QUIT:
            pygame.quit()
            sys.exit()


    pygame.display.update()
    fpsTime.tick(FPS)

Answer 1

您可以通过查找x或y中哪个位置差最远来确定cat的方向，并按如下方式移动：

dx = imgx2 - imgx1
dy = imgy2 - imgy1


if abs(dx) > abs(dy):
    if dx < 0:
        catMovement = 'right'
    else:
        catMovement = 'left'
else:
    if dy < 0:
        catMovement = 'down'
    else:
        catMovement = 'up'

你必须为猫的移动和鼠标的移动设置单独的变量，除非你改变它们的速度，否则猫总是相对快速地抓住鼠标。在

要使鼠标事件触发该运动，可以编写如下内容

^{pr2}$

你也可以使用pygame.KEYDOWN对于关键事件。最后，如果你想让猫杀死老鼠，你必须在每一帧比较猫和老鼠的位置。这里我检查一下x和y的差值是否都小于10个像素，您可以根据图像的大小进行更改。在

if abs(imgx2 - imgx1) < 10 and abs(imgy2 - imgy1) < 10:
    print "Mouse Caught!!!"

下面是一个对我有用的示例代码（我没有图像，所以我将它们改为正方形）

#Agustin Loomis
#'Cat & Mouse Chaser Game'
#Last Modification 4/20/14
#Cat char chases Mouse char

import pygame #import essentials
import sys
from pygame.locals import*
import math

pygame.init() #initialize pygame
#color setup
white = (255,255,255)
black = (0,0,0)
red = (255, 0 , 0)
green = (0, 255, 0)
blue = (0, 0, 255)
yellow = (255, 255, 0)
cyan = (0,255,255)
purple = (255, 0 , 255)
FPS = 30 #assign Frame Per Second to the value of 30
fpsTime = pygame.time.Clock() #assign 'fpsTime' to pygame time clock

setDisplay = pygame.display.set_mode((500,500)) #set the display screen to 500, 500
pygame.display.set_caption('Cat & Mouse Chaser Game')

#imgCat = pygame.image.load('include/NyanCat.jpg') #load img for the char cat
imgCat = pygame.Surface((10,10));imgCat.fill((255,0,0))
imgx1 = 0 #assign img coordinates
imgy1 = 400

#imgMouse = pygame.image.load('include/run-with-the-mice.gif') #load imf for the Mouse char
imgMouse = pygame.Surface((10,10));imgMouse.fill((0,255,0))
imgx2 = 10 #assign img coordinates
imgy2 = 200

pixChange = 5 #assign variable pixel change to value of 5
catMovement = 'down'   #assign movement constant to down
mouseMovement = 'right'

def move():     #function for moving the cat and mouse
    global mouseMovement,catMovement
    global imgx1,imgy1,imgx2,imgy2
    if mouseMovement == 'down':
        imgy1 += pixChange
        if imgy1 > 400:
            mouseMovement = 'right'

    elif mouseMovement == 'right':
        imgx1 += pixChange
        if imgx1 > 400:
            mouseMovement = 'up'

    elif mouseMovement == 'up':
        imgy1 -= pixChange

    if imgy1 < 10:
        mouseMovement = 'left'

elif mouseMovement == 'left':
    imgx1 -= pixChange
    if imgx1 < 40:
        mouseMovement = 'down'


if catMovement == 'down':
    imgy2 += pixChange
    dx = imgx2 - imgx1
    dy = imgy2 - imgy1

elif catMovement == 'right':
    imgx2 += pixChange
    dx = imgx2 - imgx1
    dy = imgy2 - imgy1

elif catMovement == 'up':
    imgy2 -= pixChange
    dx = imgx2 - imgx1
    dy = imgy2 - imgy1

elif catMovement == 'left':
    imgx2 -= pixChange
    dx = imgx2 - imgx1
    dy = imgy2 - imgy1


if abs(dx) > abs(dy):
    if dx < 0:
        catMovement = 'right'
    else:
        catMovement = 'left'
else:
    if dy < 0:
        catMovement = 'down'
    else:
        catMovement = 'up'

开始=错误 while True:#while True将显示屏设置为黑色 设置显示.fill（黑色）

if started:
    move()

if abs(imgx2 - imgx1) < 10 and abs(imgy2 - imgy1) < 10: #if the distance between the cat and the mouse is less than 10
    print "Mouse Caught!!!"
    break

setDisplay.blit(imgCat, (imgx1,imgy1))
setDisplay.blit(imgMouse, (imgx2, imgy2))
for event in pygame.event.get():
    if event.type == QUIT:
        pygame.quit()
        sys.exit()
    if event.type == pygame.MOUSEBUTTONDOWN:            #start if any mouse button is pressed down
        started = True


pygame.display.update()
fpsTime.tick(FPS)