pygame platformer-如何使底部稳定？

pygame platformer-如何使底部稳定？

这是一个简短的平台游戏示例。机芯尤其重要。您必须首先沿x轴移动，检查播放器是否与墙壁碰撞，然后在发生碰撞时将其移回墙壁。然后，对y轴执行相同的 *** 作。如果您不将机芯分为这两个部分，那么如果您同时按下多个机芯键，则玩家将跳到墙的侧面，顶部或底部。

import pygame as pgpg.init()WINDOW_WIDTH, WINDOW_HEIGHT = 800, 600screen = pg.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))GRAY = pg.Color('gray24')GRAVITY = 800class Player(pg.sprite.Sprite):    def __init__(self, pos, blocks):        super().__init__()        self.image = pg.Surface((30, 50))        self.image.fill(pg.Color(0, 110, 170))        self.rect = self.image.get_rect(topleft=pos)        self.vel = pg.math.Vector2(0, 0)        self.pos = pg.math.Vector2(pos)        self.blocks = blocks        self.on_ground = False    def update(self, dt):        # Move along x-axis.        self.pos.x += self.vel.x * dt        self.rect.x = self.pos.x        collisions = pg.sprite.spritecollide(self, self.blocks, False)        for block in collisions:  # Horizontal collision occurred. if self.vel.x > 0:  # Moving right.     self.rect.right = block.rect.left  # Reset the rect pos. elif self.vel.x < 0:  # Moving left.     self.rect.left = block.rect.right  # Reset the rect pos. self.pos.x = self.rect.x  # Update the actual x-position.        # Move along y-axis.        self.pos.y += self.vel.y * dt        # +1 to check if we're on a platform each frame.        self.rect.y = self.pos.y + 1        # Prevent air jumping when falling.        if self.vel.y > 0: self.on_ground = False        collisions = pg.sprite.spritecollide(self, self.blocks, False)        for block in collisions:  # Vertical collision occurred. if self.vel.y > 0:  # Moving down.     self.rect.bottom = block.rect.top  # Reset the rect pos.     self.vel.y = 0  # Stop falling.     self.on_ground = True elif self.vel.y < 0:  # Moving up.     self.rect.top = block.rect.bottom  # Reset the rect pos.     self.vel.y = 0  # Stop jumping. self.pos.y = self.rect.y  # Update the actual y-position.        # Stop the player at screen bottom.        if self.rect.bottom >= WINDOW_HEIGHT: self.vel.y = 0 self.rect.bottom = WINDOW_HEIGHT self.pos.y = self.rect.y self.on_ground = True        else: self.vel.y += GRAVITY * dt  # Gravityclass Block(pg.sprite.Sprite):    def __init__(self, rect):        super().__init__()        self.image = pg.Surface(rect.size)        self.image.fill(pg.Color('paleturquoise2'))        self.rect = rectdef main():    clock = pg.time.Clock()    done = False    dt = 0    all_sprites = pg.sprite.Group()    blocks = pg.sprite.Group()    player = Player((300, 100), blocks)    all_sprites.add(player)    rects = ((300, 200, 30, 70), (100, 350, 270, 30),  (500, 450, 30, 170), (400, 570, 270, 30),  (500, 150, 70, 170), (535, 310, 270, 70))    for rect in rects:  # Create the walls/platforms.        block = Block(pg.Rect(rect))        all_sprites.add(block)        blocks.add(block)    while not done:        for event in pg.event.get(): if event.type == pg.QUIT:     done = True elif event.type == pg.KEYDOWN:     if event.key == pg.K_a:         player.vel.x = -220     elif event.key == pg.K_d:         player.vel.x = 220     elif event.key == pg.K_w:  # Jump         if player.on_ground:  player.vel.y = -470  player.pos.y -= 20  player.on_ground = False elif event.type == pg.KEYUP:     if event.key == pg.K_a and player.vel.x < 0:         player.vel.x = 0     elif event.key == pg.K_d and player.vel.x > 0:         player.vel.x = 0        all_sprites.update(dt)        screen.fill(GRAY)        all_sprites.draw(screen)        pg.display.flip()        dt = clock.tick(60) / 1000if __name__ == '__main__':    main()    pg.quit()

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这是您在注释中发布的代码的有效版本（仅对于垂直碰撞，还需要添加水平碰撞）。因此，当玩家跳跃并与平台碰撞时，您必须将设置

player.rect.top

为

platform.rect.bottom

并更改

vel.y

。

import pygame as pgfrom pygame.math import Vector2 as vecpg.init()WIDTH, HEIGHT = 800, 600YELLOW = pg.Color('yellow')GREEN = pg.Color('green')BLACK = pg.Color('gray11')screen = pg.display.set_mode((WIDTH,HEIGHT))clock = pg.time.Clock()FPS = 60PLAYER_FRICTION = .95PLAYER_ACC = .2class Player(pg.sprite.Sprite):    def __init__(self):        pg.sprite.Sprite.__init__(self)        self.image = pg.Surface((30, 40))        self.image.fill(YELLOW)        self.rect = self.image.get_rect(center=(WIDTH/2, HEIGHT-30))        self.pos = vec(WIDTH/2, HEIGHT/2)        self.vel = vec(0,0)        self.acc = vec(0,0)    def jump(self):        self.rect.y += 1        hits = pg.sprite.spritecollide(self, platforms, False)        self.rect.y -= 1        if hits: self.vel.y = -13    def update(self):        self.acc = vec(0, 0.5)        keys = pg.key.get_pressed()        if keys[pg.K_a]: self.acc.x = -PLAYER_ACC        if keys[pg.K_d]: self.acc.x = PLAYER_ACC        # apply friction        self.vel.x *= PLAYER_FRICTION        self.vel += self.acc        self.pos += self.vel        # wrap around the sides of the screen        if self.pos.x > WIDTH: self.pos.x = 0        if self.pos.x < 0: self.pos.x = WIDTH        self.rect.midbottom = self.posclass 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(topleft=(x, y))all_sprites = pg.sprite.Group()platforms = pg.sprite.Group()player = Player()all_sprites.add(player)# spawns and adds platforms to groupp1 = Platform(0, HEIGHT - 40, WIDTH, 40)p2 = Platform(WIDTH / 2 - 50, HEIGHT - 300, 100, 20)p3 = Platform(WIDTH / 2 - 100, HEIGHT - 150, 200, 20)all_sprites.add(p1, p2, p3)platforms.add(p1, p2, p3)running = Truewhile running:    clock.tick(FPS)    for event in pg.event.get():        if event.type == pg.QUIT: running = False        if event.type == pg.KEYDOWN: if event.key == pg.K_SPACE:     player.jump()    all_sprites.update()    # Check if we hit a wall/platform.    hits = pg.sprite.spritecollide(player, platforms, False)    for platform in hits:  # Iterate over the collided platforms.        if player.vel.y > 0:  # We're falling. player.rect.bottom = platform.rect.top player.vel.y = 0        elif player.vel.y < 0:  # We're jumping. player.rect.top = platform.rect.bottom player.vel.y = 3        player.pos.y = player.rect.bottom    #Draw / render    screen.fill(BLACK)    all_sprites.draw(screen)    pg.display.flip()pg.quit()

顺便说一句，在跳跃方法，你必须改变

self.rect.y

不

self.rect.x

。