【pygame游戏编程】第四篇-----打字测速游戏

下面我们一起用pygame编写一个打字测速游戏

这是一个很实用的有趣的小游戏：

开始之前先来学习几个小函数：

1、 ord(ch)

python内置函数，传入一个字符，返回字符的ascii码

2、chr(num)

python内置函数，传入一个十进制或十六进制，返回ascii码对应的字符

3、os.path.getsize(filename)

传入文件路径，返回文件大小，返回0为空文件

4、pygame.key.get_pressed()

返回一个记录按键事件的字典，字典中的键为按键类型，字典中的值为bool中的True或者False、

例如：

keys = pygame.key.get_pressed()

if keys[K_RETURN]:
    print("按了回车键")

下面是我们的代码

我们将全部代码写在多个.py文件中，最后通过主程序引入各个子程序，这样做可以让我们编写程序逻辑更清晰，有助于修改调整程序。

游戏主程序

import pygame
import sys
import time
from random import randint

from settings import Setting
from displayboard import Displayboard
import functions as fun

pygame.init()

my_settings = Setting()

screen = pygame.display.set_mode((my_settings.screen_width,
                                  my_settings.screen_high))
pygame.display.set_caption("Test Your Typing")

dis_board = Displayboard(my_settings, screen)

#标志变量
letter_ascii = randint(97, 122)
letter = chr(letter_ascii - 32)
game_active = False
scores = 0
speed = 0
timing = False
remaining_time = my_settings.limited_time
fastest_speed = int (fun.read_fastest_speed(my_settings.filename))

while True:
    '''游戏的主循环'''
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.KEYDOWN:
           if event.key == pygame.K_ESCAPE:
            pygame.quit()
            sys.exit()

    keys = pygame.key.get_pressed()
    if keys[pygame.K_RETURN] and not game_active:
        scores = 0
        remaining_time = my_settings.limited_time
        game_active = True
        timing = True

    #开始计时
    if timing:
        start_time = time.perf_counter()
        timing = False

    #填充界面
    screen.fill(my_settings.BLUE)

    #显示文本图像
    dis_board.display_speed_text(speed)

    dis_board.display_fastest_text(fastest_speed)

    #游戏还未开始时执行的操作
    if not game_active:

        pygame.mouse.set_visible(True)

        dis_board.display_top_text()

        dis_board.display_start_text()

    #游戏进行时执行的操作
    if game_active:

        pygame.mouse.set_visible(False)

        dis_board.display_letter_text(letter)

        dis_board.display_remaining_time_text(remaining_time)

        if event.type == pygame.KEYDOWN:
            dis_board.display_typing_text()

            if event.key == letter_ascii:
                scores += 1
                letter_ascii = randint(97, 122)
                letter = chr(letter_ascii - 32)

        speed = scores * 3

        current_time = time.perf_counter()
        remaining_time = int (my_settings.limited_time - (current_time - start_time))
        if remaining_time < 0:
            game_active = False

        if speed >= fastest_speed:
            fastest_speed = speed
            fun.write_fastest_speed(speed, my_settings.filename)        

    pygame.display.flip()

存放游戏设置的程序

class Setting():
    '''存放游戏中的设置'''

    def __init__(self):

        #屏幕尺寸
        self.screen_width = 700
        self.screen_high = 550
        #字体大小
        self.s_font_size = 24
        self.m_font_size = 35
        self.l_font_size = 200
        #按钮尺寸
        self.button_width = 100
        self.button_high = 35
        #测试时间
        self.limited_time = 20

        #颜色
        self.YELLOW    = (255, 255,   0)
        self.WHITE     = (255, 255, 255)
        self.BLACK     = (  0,   0,   0)
        self.RED       = (255,   0,   0)
        self.GREEN     = (  0, 255,   0)
        self.DARKGREEN = (  0, 155,   0)
        self.DARKGRAY  = ( 40,  40,  40)
        self.OLIVE     = (128, 128,   0)
        self.BLUE      = (  0,   0, 255)
        self.NAVYBLUE  = (  0,   0, 128)

        #位置
        self.top_text_position = (20, 20)
        self.speed_text_position = (20, 100)

        #文本内容
        self.top_text = "Try to keep up " + str(self.limited_time) + " seconds!"
        self.start_text = "Please Enter To Start!"

        #文件名
        self.filename = r'flies\speed.txt'

存放主程序函数的程序

import os

def read_fastest_speed(speed_file):
    file_size = os.path.getsize(speed_file)
    if file_size == 0:
        return 0
    else:
        with open(speed_file) as speed_file:
            lines = speed_file.readlines()
            return lines[0]

def write_fastest_speed(speed, speed_file):
    with open(speed_file) as file:
        file.write(str(speed))

显示文本的程序

import pygame

class Displayboard():
    '''展示程序中的文本'''

    def __init__(self, my_settings, screen):

        self.screen = screen
        self.my_settings = my_settings
        self.screen_rect = screen.get_rect()

        #获取字体对象
        self.s_font = pygame.font.Font(r'fonts\freesansbold.ttf',
                                       my_settings.s_font_size)
        self.m_font = pygame.font.Font(r'fonts\freesansbold.ttf',
                                       my_settings.m_font_size)
        self.l_font = pygame.font.Font(r'fonts\freesansbold.ttf',
                                       my_settings.l_font_size)

        #获取文本图片
        self.top_text_image = self.s_font.render(my_settings.top_text, True,
                                                 my_settings.YELLOW)

        self.typing_flag_image = self.s_font.render("typing!", True,
                                                    my_settings.DARKGRAY)

        self.start_text_image = self.m_font.render(my_settings.start_text, True,
                                         my_settings.GREEN, my_settings.OLIVE)

        #获取surface的rect
        self.start_image_rect = self.start_text_image.get_rect()
        self.start_image_rect.center = self.screen_rect.center

        self.typing_image_rect = self.typing_flag_image.get_rect()
        self.typing_image_rect.right = self.screen_rect.right - 20
        self.typing_image_rect.top = 20

#显示各个文本的函数
    def display_top_text(self):
        self.screen.blit(self.top_text_image,
                         self.my_settings.top_text_position)

    def display_typing_text(self):
        self.screen.blit(self.typing_flag_image, self.typing_image_rect)

    def display_start_text(self):
        self.screen.blit(self.start_text_image, self.start_image_rect)

    def display_speed_text(self, speed):
        speed_text_image = self.s_font.render("Current Speed: " + str(speed) + " letters/min",
                                  True, self.my_settings.YELLOW)
        speed_text_rect = speed_text_image.get_rect()
        speed_text_rect.centery = self.screen_rect.centery / 2
        speed_text_rect.right = self.screen_rect.right - 20
        self.screen.blit(speed_text_image, speed_text_rect)

    def display_letter_text(self, letter):
        letter_text_image = self.l_font.render(letter, True,
                                               self.my_settings.RED)
        letter_rect = letter_text_image.get_rect()
        letter_rect.centerx = self.screen_rect.centerx
        letter_rect.centery = self.screen_rect.bottom * 2 / 3
        self.screen.blit(letter_text_image, letter_rect)

    def display_remaining_time_text(self, remaining_time):
        remaining_time_image = self.s_font.render("Remaining Time: " + str(remaining_time),
                             True, self.my_settings.OLIVE)
        remaining_time_rect = remaining_time_image.get_rect()
        remaining_time_rect.top = self.screen_rect.top + 20
        remaining_time_rect.centerx = self.screen_rect.centerx
        self.screen.blit(remaining_time_image, remaining_time_rect)

    def display_fastest_text(self, fastest_speed):
        fastest_speed_image = self.s_font.render("Fastest Speed: " + str(fastest_speed),
                                                 True, self.my_settings.YELLOW)
        fastest_speed_rect = fastest_speed_image.get_rect()
        fastest_speed_rect.centery = self.screen_rect.centery / 2
        fastest_speed_rect.left = 20
        self.screen.blit(fastest_speed_image, fastest_speed_rect)