矩形在触地时振动。

huangapple
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英文:

rectangle vibrating when touching the ground

问题

大家好。我正在尝试学习关于瓦片地图中的碰撞。但是，我在y轴碰撞方面遇到了问题。当玩家矩形触碰地面时，它开始抖动。我一直在努力找出问题所在，但一直没有成功。有人可以帮助我吗？

这是我的代码：

英文:

everyone. I am trying to learn collisions in tilemaps. I am however having problems with the y-collision. when the player rectangle touches the ground, it starts to vibrate. I have been trying to figure out what the problem is, but to no avail. can someone help me?

Here is my code:

  1. import pygame
  2. from sys import exit
  3. pygame.init()
  5. screen = pygame.display.set_mode((800, 600))
  6. clock = pygame.time.Clock()
  9. class Player:
  10.     def __init__(self, x, y):
  11.         self.rect = pygame.Rect(x, y, 40, 40)
  12.         self.rect.x = x
  13.         self.rect.y = y
  15.         self.vel = 4
  16.         self.dx = 0
  17.         self.dy = 0
  19.         self.is_jump = False
  20.         self.is_stand = False
  21.         self.jump_count = 10
  23.     def handle_input(self):
  24.         key = pygame.key.get_pressed()
  25.         if key[pygame.K_RIGHT]:
  26.             self.dx = self.vel
  27.         elif key[pygame.K_LEFT]:
  28.             self.dx = -self.vel
  29.         else:
  30.             self.dx = 0
  32.         if key[pygame.K_SPACE]:
  33.             self.is_jump = True
  34.             self.is_stand = False
  35.             self.dy = -self.jump_count
  37.     def update(self):
  38.         self.handle_input()
  39.         pygame.draw.rect(screen, (0, 255, 0), self.rect)
  40.         self.rect.update(self.rect.x, self.rect.y, 40, 40)
  43. class Game:
  44.     def __init__(self):
  45.         self.map = [
  46.             ["T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T"],
  47.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  48.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  49.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  50.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  51.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  52.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  53.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  54.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T", "T", "T", "T", "T", "T", "T"],
  55.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  56.             ["T", "T", "T", "T", "T", "T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  57.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  58.             ["T", "0", "P", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  59.             ["T", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "T"],
  60.             ["T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T", "T"]
  61.         ]
  63.         self.tiles = []
  64.         for row_num, row in enumerate(self.map):
  65.             for col_num, column in enumerate(row):
  66.                 if column == "T":
  67.                     rect = pygame.Rect(40*col_num, 40*row_num, 40, 40)
  68.                     self.tiles.append(rect)
  69.                 elif column == "P":
  70.                     self.player = Player(40*col_num, 40*row_num)
  72.         self.gravity = 5
  73.         self.grav_rate = 0.3
  75.     def physics(self, obj):
  76.         obj.dy += self.grav_rate
  77.         if obj.dy > self.gravity:
  78.             obj.dy = self.gravity
  80.         for tile in self.tiles:
  81.             coll_x = obj.rect.x + obj.dx, obj.rect.y, obj.rect.w, obj.rect.h - 1
  82.             coll_y = obj.rect.x, obj.rect.y + obj.dy, obj.rect.w, obj.rect.h
  84.             if tile.colliderect(coll_x):
  85.                 pygame.draw.rect(screen, (255, 255, 0), (tile.x, tile.y, 10, 10))
  86.                 if obj.dx < 0:
  87.                     obj.rect.left = tile.right
  88.                 elif obj.dx > 0:
  89.                     obj.rect.right = tile.left
  90.                 obj.dx = 0
  92.             if tile.colliderect(coll_y):
  93.                 pygame.draw.rect(screen, (255, 255, 255), (tile.x, tile.y, 10, 10), 2)
  94.                 if obj.dy < 0:
  95.                     obj.dy = -obj.dy
  96.                 elif obj.dy > 0:
  97.                     obj.dy = 0
  98.                     obj.is_jump = False
  99.                     obj.is_stand = True
  100.                     obj.rect.bottom = tile.top
  102.             # pygame.draw.rect(screen, (255, 255, 0), coll_x, 1)
  103.             # pygame.draw.rect(screen, (255, 255, 255), coll_y, 1)
  105.         obj.rect.x += obj.dx
  106.         obj.rect.y += obj.dy
  108.     def update(self):
  109.         while True:
  110.             screen.fill((0, 0, 0))
  111.             for event in pygame.event.get():
  112.                 if event.type == pygame.QUIT:
  113.                     exit()
  115.             for tile in self.tiles:
  116.                 pygame.draw.rect(screen, (255, 0, 0), tile)
  118.             self.physics(self.player)
  119.             self.player.update()
  121.             pygame.display.update()
  122.             clock.tick(60)
  125. g = Game()
  126. g.update()

答案1

得分: 0

你必须在进行碰撞检测和游戏物理运算之前更新玩家的位置：

  1. class Game:
  2.     # [...]
  4.     def physics(self, obj):
  5.         obj.dy += self.grav_rate
  6.         if obj.dy > self.gravity:
  7.             obj.dy = self.gravity
  9.         obj.rect.x += obj.dx                # <-- 插入
  10.         obj.rect.y += obj.dy
  12.         for tile in self.tiles:
  13.             coll_x = obj.rect.x + obj.dx, obj.rect.y, obj.rect.w, obj.rect.h - 1
  14.             coll_y = obj.rect.x, obj.rect.y + obj.dy, obj.rect.w, obj.rect.h
  16.             if tile.colliderect(coll_x):
  17.                 pygame.draw.rect(screen, (255, 255, 0), (tile.x, tile.y, 10, 10))
  18.                 if obj.dx < 0:
  19.                     obj.rect.left = tile.right
  20.                 elif obj.dx > 0:
  21.                     obj.rect.right = tile.left
  22.                 obj.dx = 0
  24.             if tile.colliderect(coll_y):
  25.                 pygame.draw.rect(screen, (255, 255, 255), (tile.x, tile.y, 10, 10), 2)
  26.                 if obj.dy < 0:
  27.                     obj.dy = -obj.dy
  28.                 elif obj.dy > 0:
  29.                     obj.dy = 0
  30.                     obj.is_jump = False
  31.                     obj.is_stand = True
  32.                     obj.rect.bottom = tile.top
  34.         # obj.rect.x += obj.dx               <-- 删除
  35.         # obj.rect.y += obj.dy
英文:

You must update the player's position before doing collision detection and game physics:

  1. class Game:
  2.     # [...]
  4.     def physics(self, obj):
  5.         obj.dy += self.grav_rate
  6.         if obj.dy &gt; self.gravity:
  7.             obj.dy = self.gravity
  9.         obj.rect.x += obj.dx                #&lt;-- INSERT
  10.         obj.rect.y += obj.dy
  12.         for tile in self.tiles:
  13.             coll_x = obj.rect.x + obj.dx, obj.rect.y, obj.rect.w, obj.rect.h - 1
  14.             coll_y = obj.rect.x, obj.rect.y + obj.dy, obj.rect.w, obj.rect.h
  16.             if tile.colliderect(coll_x):
  17.                 pygame.draw.rect(screen, (255, 255, 0), (tile.x, tile.y, 10, 10))
  18.                 if obj.dx &lt; 0:
  19.                     obj.rect.left = tile.right
  20.                 elif obj.dx &gt; 0:
  21.                     obj.rect.right = tile.left
  22.                 obj.dx = 0
  24.             if tile.colliderect(coll_y):
  25.                 pygame.draw.rect(screen, (255, 255, 255), (tile.x, tile.y, 10, 10), 2)
  26.                 if obj.dy &lt; 0:
  27.                     obj.dy = -obj.dy
  28.                 elif obj.dy &gt; 0:
  29.                     obj.dy = 0
  30.                     obj.is_jump = False
  31.                     obj.is_stand = True
  32.                     obj.rect.bottom = tile.top
  34.         # obj.rect.x += obj.dx               &lt;-- DELETE
  35.         # obj.rect.y += obj.dy

huangapple
  • 本文由 发表于 2023年6月19日 23:01:55
  • 转载请务必保留本文链接：https://go.coder-hub.com/76507872.html
  • pygame
  • python
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