配套视频教程

配套视频教程

本节最终效果

image

这个游戏大致玩法就是和超级玛丽差不多，可以不停在各个档板上跳动，同时受到重力的作用，会向下掉，如果落下时，没有站在档板上，就输了。
我们加入重力因素，继续改造sprites.py
Player在update中，acc加速度初始化时，引入了垂直方向的加速度

碰撞后，方块底部要停在档板上，所以要改成rect.midbottom

新增档板类(sprites.py)

新建了一个Platform类，用来模拟档板，其实就是一个绿色的长矩形条

class Platform(pg.sprite.Sprite):
    def __init__(self, x, y, w, h):
        pg.sprite.Sprite.__init__(self)
        self.image = pg.Surface((w, h))
        self.image.fill(GREEN)
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y

main.py创建2个挡板，其中一个宽度和窗口等宽的相当于地面

update方法中，进行碰撞检测

最终效果

image

完整代码：
main.py

import pygame as pg
import random
from settings import *
from sprites import *

class Game:
    def __init__(self):
        # initialize game window, etc
        pg.init()
        pg.mixer.init()
        self.screen = pg.display.set_mode((WIDTH, HEIGHT))
        pg.display.set_caption(TITLE)
        self.clock = pg.time.Clock()
        self.running = True

    def new(self):
        # start a new game
        self.all_sprites = pg.sprite.Group()
        self.platforms = pg.sprite.Group()
        self.player = Player()
        self.all_sprites.add(self.player)
        p1 = Platform(0, HEIGHT - 40, WIDTH, 40)
        self.all_sprites.add(p1)
        self.platforms.add(p1)
        p2 = Platform(WIDTH / 2 - 50, HEIGHT * 3 / 4, 100, 20)
        self.all_sprites.add(p2)
        self.platforms.add(p2)
        self.run()

    def run(self):
        # Game Loop
        self.playing = True
        while self.playing:
            self.clock.tick(FPS)
            self.events()
            self.update()
            self.draw()

    def update(self):
        # Game Loop - Update
        self.all_sprites.update()
        hits = pg.sprite.spritecollide(self.player, self.platforms, False)
        if hits:
            self.player.pos.y = hits[0].rect.top
            self.player.vel.y = 0

    def events(self):
        # Game Loop - events
        for event in pg.event.get():
            # check for closing window
            if event.type == pg.QUIT:
                if self.playing:
                    self.playing = False
                self.running = False

    def draw(self):
        # Game Loop - draw
        self.screen.fill(BLACK)
        self.all_sprites.draw(self.screen)
        # *after* drawing everything, flip the display
        pg.display.flip()

    def show_start_screen(self):
        # game splash/start screen
        pass

    def show_go_screen(self):
        # game over/continue
        pass

g = Game()
g.show_start_screen()
while g.running:
    g.new()
    g.show_go_screen()

pg.quit()

sprites.py

import pygame as pg
import random
from settings import *
from sprites import *

class Game:
    def __init__(self):
        # initialize game window, etc
        pg.init()
        pg.mixer.init()
        self.screen = pg.display.set_mode((WIDTH, HEIGHT))
        pg.display.set_caption(TITLE)
        self.clock = pg.time.Clock()
        self.running = True

    def new(self):
        # start a new game
        self.all_sprites = pg.sprite.Group()
        self.platforms = pg.sprite.Group()
        self.player = Player()
        self.all_sprites.add(self.player)
        p1 = Platform(0, HEIGHT - 40, WIDTH, 40)
        self.all_sprites.add(p1)
        self.platforms.add(p1)
        p2 = Platform(WIDTH / 2 - 50, HEIGHT * 3 / 4, 100, 20)
        self.all_sprites.add(p2)
        self.platforms.add(p2)
        self.run()

    def run(self):
        # Game Loop
        self.playing = True
        while self.playing:
            self.clock.tick(FPS)
            self.events()
            self.update()
            self.draw()

    def update(self):
        # Game Loop - Update
        self.all_sprites.update()
        hits = pg.sprite.spritecollide(self.player, self.platforms, False)
        if hits:
            self.player.pos.y = hits[0].rect.top
            self.player.vel.y = 0

    def events(self):
        # Game Loop - events
        for event in pg.event.get():
            # check for closing window
            if event.type == pg.QUIT:
                if self.playing:
                    self.playing = False
                self.running = False

    def draw(self):
        # Game Loop - draw
        self.screen.fill(BLACK)
        self.all_sprites.draw(self.screen)
        # *after* drawing everything, flip the display
        pg.display.flip()

    def show_start_screen(self):
        # game splash/start screen
        pass

    def show_go_screen(self):
        # game over/continue
        pass

g = Game()
g.show_start_screen()
while g.running:
    g.new()
    g.show_go_screen()

pg.quit()