Pygame 鼠标拖动碰撞

Question

我对编码和 pygame 还很陌生，我正在尝试制作一个简单的迷宫游戏，您可以在其中拖动角色穿过迷宫而不撞到边（有点像棋盘游戏“操作”）。

大部分都在工作，但我不知道当它撞到迷宫的墙壁时让它停止移动的命令。我已经想出了如何让它寻找碰撞：

if player.colliderect(mazewall):
         ??????

但我不确定如何让“玩家”不通过“迷宫墙”。我正在寻找像这样工作的东西：

if player.bottom >= 390:
   player.bottom = 390

因此，您可以随意拖动播放器，但仍无法将其拉到迷宫墙的上方或下方。 到目前为止，这是我的完整代码：

#Import stuff
import pygame as pg
from pygame import Surface
import time
#Initialize
pg.init()

#Some colours
black = (0,0,0)
white = (255,255,255)
red = (255,0,0)
blue = (0,0,255)
green = (0, 255, 0)
walls = (146, 200, 203)
background = (253, 208, 236)

#Make the size of the panel
screen_width = 700
screen_height = 430
screen = pg.display.set_mode([screen_width, screen_height])
pg.display.set_caption("Runner")

#x, y, How big)
player = pg.rect.Rect(50, 350, 17, 17)
player_dragging = False

#Make the maze
mazewall = pg.rect.Rect(20, 390, 200, 20)

Run = True
while Run:
    for event in pg.event.get():
        #If the player clicks the close button
        if event.type == pg.QUIT:
            Run = False
        elif event.type == pg.KEYDOWN:
            if event.key == pg.K_ESCAPE:
                Run = False        
        #All the player dragging stuff
        elif event.type == pg.MOUSEBUTTONDOWN:
            if event.button == 1:            
                if player.collidepoint(event.pos):
                    player_dragging = True
                    mouse_x, mouse_y = event.pos
                    offset_x = player.x - mouse_x
                    offset_y = player.y - mouse_y                  
        elif event.type == pg.MOUSEBUTTONUP:
            if event.button == 1:            
                player_dragging = False       
        elif event.type == pg.MOUSEMOTION:
            if player_dragging:
                mouse_x, mouse_y = event.pos
                player.x = mouse_x + offset_x
                player.y = mouse_y + offset_y


    #This is the bit I'm not sure about, I want it to work like this (Run the program)
    if player.bottom >= 390:
        player.bottom = 390
    #But with this instead

    #player.colliderect(mazewall)

    #Set the background
    screen.fill(background)

    #Draw the player
    pg.draw.rect(screen, black, player)
    #Draw the maze
    pg.draw.rect(screen, walls, mazewall)

    pg.display.flip()


pg.quit()

Answer 1

只需添加player.colliderect(mazewall)。这样，如果玩家与迷宫墙发生碰撞，colliderect函数将返回True。

    if player.bottom >= 390 and player.colliderect(mazewall):
        player.bottom = 390