【发布时间】：2016-01-23 13:17:27
【问题描述】：
我正在开始一个角色扮演游戏，当角色向两边靠墙奔跑时，我无法让玩家平稳地上下移动。此外，角色在按住上下键并向北或南靠墙奔跑时，无法平稳地左右移动。
我尝试了“移动”功能的不同配置，但没有成功。我知道为什么算法不起作用，我只是不知道如何构造分支，以便在向右运行时，它将设置'self.rect.right = p.rect.left'而不设置'self .rect.bottom = p.rect.top' 下一次调用 'move()' 时，我在靠墙跑步时开始按下。
def move(self, x, y, platforms):
self.rect.left += x
self.rect.top += y
for p in platforms:
if pygame.sprite.collide_rect(self, p):
if isinstance(p, ExitBlock):
pygame.event.post(pygame.event.Event(QUIT))
if self.x > 0: # Moving right
self.rect.right = p.rect.left
if self.x < 0: # Moving left
self.rect.left = p.rect.right
if self.y > 0: # Moving down
self.rect.bottom = p.rect.top
if self.y < 0: # Moving up
self.rect.top = p.rect.bottom
这是您可以运行以查看不需要的行为的完整代码：
#! /usr/bin/python
import pygame, platform, sys
platform.architecture()
from pygame import *
import spritesheet
from sprite_strip_anim import SpriteStripAnim
WIN_W = 1400
WIN_H = 800
HALF_W = int(WIN_W / 2)
HALF_H = int(WIN_H / 2)
DEPTH = 32
FLAGS = 0
CAMERA_SLACK = 30
class Entity(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
class Player(Entity):
def __init__(self, x, y):
Entity.__init__(self)
self.x = 0
self.y = 0
self.onGround = False
self.image = Surface((32,32))
self.image.fill(Color("#0000FF"))
self.image.convert()
self.rect = Rect(x, y, 32, 32)
def update(self, up, down, left, right, running, platforms):
if up:
self.y = -5
if down:
self.y = 5
if left:
self.x = -5
if right:
self.x = 5
if not(left or right):
self.x = 0
if not(up or down):
self.y = 0
self.move(self.x, 0, platforms)
self.move(0, self.y, platforms)
def move(self, x, y, platforms):
self.rect.left += x
self.rect.top += y
for p in platforms:
if pygame.sprite.collide_rect(self, p):
if isinstance(p, ExitBlock):
pygame.event.post(pygame.event.Event(QUIT))
if self.x > 0: # Moving right
self.rect.right = p.rect.left
if self.x < 0: # Moving left
self.rect.left = p.rect.right
if self.y > 0: # Moving down
self.rect.bottom = p.rect.top
if self.y < 0: # Moving up
self.rect.top = p.rect.bottom
class Platform(Entity):
def __init__(self, x, y):
Entity.__init__(self)
self.image = Surface((32, 32))
self.image.convert()
self.image.fill(Color("#DDDDDD"))
self.rect = Rect(x, y, 32, 32)
def update(self):
pass
class ExitBlock(Platform):
def __init__(self, x, y):
Platform.__init__(self, x, y)
self.image.fill(Color("#0033FF"))
def main():
pygame.init
screen = pygame.display.set_mode((WIN_W, WIN_H), FLAGS, DEPTH)
pygame.display.set_caption("Use arrows to move!")
timer = pygame.time.Clock()
up = down = left = right = running = False
bg = Surface((32,32))
bg.convert()
bg.fill(Color("#000000"))
entities = pygame.sprite.Group()
player = Player(32, 32)
platforms = []
x = y = 0
level = [
"PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP",
"P P",
"P P",
"P P",
"P PPPPPPPPPPP P",
"P P",
"P P",
"P P",
"P PPPPPPPP P",
"P P",
"P PPPPPPP P",
"P PPPPPP P",
"P P",
"P PPPPPPP P",
"P P",
"P PPPPPP P",
"P P",
"P PPPPPPPPPPP P",
"P P",
"P PPPPPPPPPPP P",
"P P",
"P P",
"P P",
"P P",
"PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP",]
# build the level
for row in level:
for col in row:
if col == "P":
p = Platform(x, y)
platforms.append(p)
entities.add(p)
if col == "E":
e = ExitBlock(x, y)
platforms.append(e)
entities.add(e)
x += 32
y += 32
x = 0
total_level_width = len(level[0])*32
total_level_height = len(level)*32
entities.add(player)
while 1:
timer.tick(60)
# draw background
for y in range(32):
for x in range(32):
screen.blit(bg, (x * 32, y * 32))
for e in pygame.event.get():
if e.type == QUIT: raise SystemExit, "QUIT"
if e.type == KEYDOWN and e.key == K_ESCAPE:
raise SystemExit, "ESCAPE"
if e.type == KEYDOWN and e.key == K_w:
up = True
down = False
if e.type == KEYDOWN and e.key == K_s:
down = True
up = False
if e.type == KEYDOWN and e.key == K_a:
left = True
right = False
if e.type == KEYDOWN and e.key == K_d:
right = True
left = False
if e.type == KEYUP and e.key == K_w:
up = False
if e.type == KEYUP and e.key == K_s:
down = False
if e.type == KEYUP and e.key == K_d:
right = False
if e.type == KEYUP and e.key == K_a:
left = False
# update player, draw everything else
player.update(up, down, left, right, running, platforms)
for e in entities:
screen.blit(e.image, e.rect)
pygame.display.update()
if __name__ == "__main__":
main()
【问题讨论】：
-
这是大量需要阅读和推理的代码； you should probably trim some of the fat 让我们更容易为您提供帮助（例如，我很确定此代码中涉及图像和颜色的所有内容都与此问题无关）。
-
我刚刚运行了这段代码，我能够在按住左或右的同时上下移动。它沿对角线移动。有时撞墙会让你跳起来。
-
这就是我要解决的问题。我希望能够靠着左边的墙跑，然后同时向上按，让角色在靠墙的同时跑起来。看一下 move 方法，你会看到分支设置了 rect 的 y 值，因为我开始向下按，同时按向左，同时撞到墙上。
标签： python pygame game-physics