from part_03.settings import *
import pygame as pgvec = pg.math.Vector2class Player(pg.sprite.Sprite):def __init__(self):pg.sprite.Sprite.__init__(self)self.image = pg.Surface((30, 30))self.image.fill(YELLOW)self.rect = self.image.get_rect()self.rect.center = WIDTH / 2, HEIGHT / 2self.pos = self.rect.centerself.vel = vec(0, 0)self.acc = vec(0, 0)self.width = self.rect.widthself.height = self.rect.heightdef update(self):# 初始化时，垂直方向加入重力加速度self.acc = vec(0, PLAYER_GRAVITY)keys = pg.key.get_pressed()if keys[pg.K_LEFT]:self.acc.x = -PLAYER_ACCif keys[pg.K_RIGHT]:self.acc.x = PLAYER_ACCself.acc.x += self.vel.x * PLAYER_FRICTIONself.vel += self.accself.pos += self.velif self.rect.left > WIDTH:self.pos.x = 0 - self.width / 2if self.rect.right < 0:self.pos.x = WIDTH + self.width / 2# 碰撞后，方块底部要停在档板上，所以要改成rect.midbottomself.rect.midbottom = self.pos# 档板类
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 = xself.rect.y = y

# game optionsSIZE = WIDTH, HEIGHT = 360, 480
FPS = 60
DEBUG = TrueTITLE = "Jumpy!"# Player properties
PLAYER_ACC = 0.5
PLAYER_GRAVITY = 0.5  # 重力加速度
PLAYER_FRICTION = -0.06# define color
BLACK = 0, 0, 0
WHITE = 255, 255, 255
RED = 255, 0, 0
GREEN = 0, 255, 0
BLUE = 0, 0, 255
YELLOW = 255, 255, 0

from part_03.sprites import *
from part_03.settings import *class Game:def __init__(self):pg.init()pg.mixer.init()self.screen = pg.display.set_mode(SIZE)pg.display.set_caption(TITLE)self.clock = pg.time.Clock()self.running = Trueself.playing = Falseself.p1 = objectdef new(self):self.all_sprites = pg.sprite.Group()# 创建一个档板Groupself.platforms = pg.sprite.Group()self.player = Player()self.all_sprites.add(self.player)# 加入2个档板实例self.p1 = Platform(0, HEIGHT - 40, WIDTH, 40)p2 = Platform(WIDTH / 2 - 50, HEIGHT / 2 + 100, 100, 20)self.all_sprites.add(self.p1)self.all_sprites.add(p2)self.platforms.add(self.p1)self.platforms.add(p2)g.run()def run(self):self.playing = Truewhile self.playing:self.clock.tick(FPS)self.events()self.update()self.draw()def update(self):self.all_sprites.update()# 碰撞检测hits = pg.sprite.spritecollide(self.player, self.platforms, False)if hits:self.player.pos.y = hits[0].rect.top# 碰撞后，将player 垂直方向的速度归0(否则物体还是会继续向下掉)self.player.vel.y = 0def events(self):for event in pg.event.get():if event.type == pg.QUIT:if self.playing:self.playing = Falseself.running = Falsedef draw(self):self.screen.fill(BLACK)self.all_sprites.draw(self.screen)self.debug()pg.display.flip()def debug(self):if DEBUG:font = pg.font.SysFont('Menlo', 25, True)pos_txt = font.render('Pos:(' + str(round(self.player.pos.x, 2)) + "," + str(round(self.player.pos.y, 2)) + ")", 1, GREEN)vel_txt = font.render('Vel:(' + str(round(self.player.vel.x, 2)) + "," + str(round(self.player.vel.y, 2)) + ")", 1, GREEN)acc_txt = font.render('Acc:(' + str(round(self.player.acc.x, 2)) + "," + str(round(self.player.acc.y, 2)) + ")", 1, GREEN)self.screen.blit(pos_txt, (20, 10))self.screen.blit(vel_txt, (20, 40))self.screen.blit(acc_txt, (20, 70))pg.draw.line(self.screen, WHITE, (0, HEIGHT / 2), (WIDTH, HEIGHT / 2), 1)pg.draw.line(self.screen, WHITE, (WIDTH / 2, 0), (WIDTH / 2, HEIGHT), 1)def show_start_screen(self):passdef show_go_screen(self):passg = Game()
g.show_start_screen()
while g.running:g.new()g.show_go_screen()pg.quit()

    def update(self):# 初始化时，垂直方向加入重力加速度self.acc = vec(0, PLAYER_GRAVITY)keys = pg.key.get_pressed()if keys[pg.K_LEFT]:self.acc.x = -PLAYER_ACCif keys[pg.K_RIGHT]:self.acc.x = PLAYER_ACCself.acc.x += self.vel.x * PLAYER_FRICTIONself.vel += self.accself.pos += self.velif self.rect.left > WIDTH:self.pos.x = 0 - self.width / 2if self.rect.right < 0:self.pos.x = WIDTH + self.width / 2# self.rect.midbottom = self.pos# 校正0.5px上下抖动的问题if abs(self.rect.bottom - self.pos.y) >= 1:self.rect.bottom = self.pos.yself.rect.x = self.pos.x - self.width / 2