pygame之《飞机大战》（三）

前言：

本章将进行基类的抽取。使代码更具有层次性和简化重复代码。

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编程代码：

导入模块

import pygame
import time
import random
from pygame.locals import *

1 - Base类的提取（所有类的基类）
所有类都有(x, y)坐标，图片的加载，即可以提取出来。

class Base(object):
    """docstring for Base"""
    def __init__(self, screen_temp, x, y, image_name):
        self.x = x
        self.y = y
        self.screen = screen_temp
        self.image = pygame.image.load(image_name)

2 - BasePlane类的提取（所有飞机的基类）
将HeroPlane 和 EnemyPlane类中相同的功能进行提取。

class BasePlane(Base):
    """docstring for BasePlane"""
    def __init__(self, screen_temp, x, y, image_name):
        Base.__init__(self, screen_temp, x, y, image_name)
        self.bullet_list = [] #存储发射出去的子弹的引用

    def display(self):
        self.screen.blit(self.image, (self.x, self.y))
        bullet_list_out = []#越界子弹
        for bullet in self.bullet_list:
            bullet.display()
            bullet.move()
            if bullet.judge(): #判断子弹是否越界
                bullet_list_out.append(bullet)
        #删除越界子弹
        for bullet in bullet_list_out: 
            self.bullet_list.remove(bullet)

提取后的HeroPlane 和 EnemyPlane的代码：

class HeroPlane(BasePlane):
    def __init__(self, screen_temp):
        BasePlane.__init__(self, screen_temp, 210, 700, "./feiji/hero1.png") #super().__init__()

    def move_left(self):
        self.x -= 5

    def move_right(self):
        self.x += 5

    def fire(self):
        self.bullet_list.append(Bullet(self.screen, self.x, self.y))


class EnemyPlane(BasePlane):
    """敌机的类"""
    def __init__(self, screen_temp):
        BasePlane.__init__(self, screen_temp, 0, 0, "./feiji/enemy0.png")
        self.direction = "right" #用来存储飞机默认显示方向

    def move(self):
        if self.direction == "right":
            self.x += 5
        elif self.direction == "left":
            self.x -= 5
        # 方向判断
        if self.x > 480-50:
            self.direction ="left"
        elif self.x < 0:
            self.direction = "right"

    def fire(self):
        random_num = random.randint(1, 100)
        if random_num == 8 or random_num == 20:
            self.bullet_list.append(EnemyBullet(self.screen, self.x, self.y))

3 - BaseBullet类的提取

class BaseBullet(Base):
    """docstring for BaseBullet"""
    def __init__(self, screen_temp, x, y, image_name):
        Base.__init__(self, screen_temp, x, y, image_name)

    def display(self):
        self.screen.blit(self.image, (self.x, self.y))


class Bullet(BaseBullet):
    def __init__(self, screen_temp, x, y):
        BaseBullet.__init__(self, screen_temp, x+40, y-20, "./feiji/bullet.png")

    def move(self):
        self.y -= 15

    def judge(self):
        if self.y < 0:
            return True
        else:
            return False


class EnemyBullet(BaseBullet):
    def __init__(self, screen_temp, x, y):
        BaseBullet.__init__(self, screen_temp, x+25, y+40, "./feiji/bullet1.png")

    def move(self):
        self.y += 5

    def judge(self):
        if self.y > 852:
            return True
        else:
            return False

main()函数并没有变动。

本章结束。

pygame之《飞机大战》（四）