Python-基于Pygame的小游戏(天空之战)（一）

前言:不久前接触了Python的游戏制作的相关第三方库，于是学习了pygame的相关内容，想制作一款基于pygame的小游戏。因为还不太熟悉游戏制作和pygame，部分内容我参考了《Python-从入门到精通》这本书。那么好，话不多说，我们直接进入今天的Python学习之旅-制作基于Pygame的小游戏(天空之战)。

一：准备游戏相关图片

制作pygame小游戏天空之战时，我们需要事先准备好相关的图片（如自己的战机，敌机，子弹等），最好是png或jpg格式。我这里用的是Windows自带的"画图"功能来制作自己的战机，敌机，子弹等图片，大家可以自行制作（需要我的原图片的话私信我发也行）。（如下所示）

敌机图片

战机图片

子弹图片

制作好图片好后我们将图片放在python项目下。（如下圆圈标注所示）

二：完整代码展示

import pygame
import sys
import random


pygame.init()
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("飞机大战")
clock = pygame.time.Clock()

player_plane_image = pygame.image.load('airplane.png').convert_alpha()
enemy_plane_image = pygame.image.load('enemy.png').convert_alpha()
bullet_image = pygame.image.load('bullet.png').convert_alpha()

BLACK = (0, 0, 0)


class PlayerPlane(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = player_plane_image
        self.rect = self.image.get_rect()
        self.rect.centerx = screen_width // 2
        self.rect.bottom = screen_height - 10
        self.speed_x = 0
        self.speed_y = 0
        self.bullets = pygame.sprite.Group()

    def update(self):
        self.rect.x += self.speed_x
        self.rect.y += self.speed_y
        if self.rect.right > screen_width:
            self.rect.right = screen_width
        if self.rect.left < 0:
            self.rect.left = 0
        if self.rect.bottom > screen_height:
            self.rect.bottom = screen_height
        if self.rect.top < 0:
            self.rect.top = 0
        self.bullets.update()

    def shoot(self):
        bullet = Bullet(self.rect.centerx, self.rect.top)
        self.bullets.add(bullet)


class EnemyPlane(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = enemy_plane_image
        self.rect = self.image.get_rect()
        self.rect.x = random.randint(0, screen_width - self.rect.width)
        self.rect.y = random.randint(-100, -40)
        self.speed_y = random.randint(1, 3)

    def update(self):
        self.rect.y += self.speed_y
        if self.rect.top > screen_height:
            self.rect.x = random.randint(0, screen_width - self.rect.width)
            self.rect.y = random.randint(-100, -40)


class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = bullet_image
        self.rect = self.image.get_rect()
        self.rect.centerx = x
        self.rect.bottom = y
        self.speed_y = -5

    def update(self):
        self.rect.y += self.speed_y
        if self.rect.bottom < 0:
            self.kill()


player_plane = PlayerPlane()
enemy_planes = pygame.sprite.Group()
for i in range(5):
    enemy_plane = EnemyPlane()
    enemy_planes.add(enemy_plane)

score = 0
font = pygame.font.Font(None, 36)

while True:
    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_LEFT:
                player_plane.speed_x = -3
            elif event.key == pygame.K_RIGHT:
                player_plane.speed_x = 3
            elif event.key == pygame.K_UP:
                player_plane.speed_y = -3
            elif event.key == pygame.K_DOWN:
                player_plane.speed_y = 3
            elif event.key == pygame.K_SPACE:
                player_plane.shoot()
        elif event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                player_plane.speed_x = 0
            elif event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                player_plane.speed_y = 0

    player_plane.update()
    enemy_planes.update()

    # 碰撞检测
    hits = pygame.sprite.groupcollide(enemy_planes, player_plane.bullets, True, True)
    for hit in hits:
        score += 1
        enemy_plane = EnemyPlane()
        enemy_planes.add(enemy_plane)

    screen.fill(BLACK)
    screen.blit(player_plane.image, player_plane.rect)
    enemy_planes.draw(screen)
    player_plane.bullets.draw(screen)

    # 显示得分
    text = font.render("Score: " + str(score), 1, (255, 255, 255))
    screen.blit(text, (10, 10))

    pygame.display.update()
    clock.tick(60)

三：运行效果展示

四：玩法介绍

上，下，左，右方向键控制移动方向，空格键控制发射。

（后续我还会更新哦）