Pygame：找到空的空間？

Question

我正在製作一個洞穴探索式的遊戲，在那裏計算機產生一個隨機的洞穴，然後引發玩家去探索它。問題是，我需要玩家創造一些洞穴裏沒有塊的地方。我試過這個：

#do generation 
px=0 
py=0 
for b in blocks: 
    while b.rect.collidepoint(px,py): 
     px=randrange(1,640) 
     py=randrange(1,480) 
     player=Player(px,py) 

但是，這似乎沒有工作，所以有人有一個建議？

下面是代碼：

import pygame 
from pygame.locals import * 
from collections import namedtuple 
from random import randrange,choice 
pygame.init() 
screen=pygame.display.set_mode((640,480)) 
Move = namedtuple('Move', ['up', 'left', 'right']) 
max_gravity=50 
class Block(object): 
    def __init__(self,x,y): 
     self.x=x 
     self.y=y 
     self.rect=pygame.Rect(self.x,self.y,16,16) 
class CaveMaker(object): 
    def __init__(self): 
     self.active=1 
     self.x=randrange(1,640) 
     self.y=randrange(1,480) 
     self.direction=(choice([25,0,-25]),choice([25,0,-25])) 
     self.rect=pygame.Rect(self.x,self.y,60,60) 
     self.timeout=choice([30,50,70,90,110]) 
     self.destroytime=randrange(200,360) 
    def Update(self): 
     if self.active==1: 
      self.x+=self.direction[0] 
      self.y+=self.direction[1] 
      self.timeout-=1 
      if self.timeout==0: 
       self.direction=(choice([25,0,-25]),choice([25,0,-25])) 
       self.timeout=choice([30,50,70,90,110]) 
      self.destroytime-=1 
      if self.destroytime==0: 
       self.active=0 
      self.rect=pygame.Rect(self.x,self.y,60,60) 
class Player(object): 
    def __init__(self, x, y): 
     self.rect = pygame.Rect(x,y,16,16) 
     self.on_ground = True 
     self.xvel = 0 
     self.yvel = 0 
     self.jump_speed = 7 
     self.move_speed = 3 

    def update(self, move, blocks): 
     if move.up and self.on_ground: 
      self.yvel -= self.jump_speed 
     if move.left: 
       self.xvel = -self.move_speed 
     if move.right: 
       self.xvel = self.move_speed 
     if not self.on_ground: 
      self.yvel += 0.3 
      # but not too fast 
      if self.yvel > max_gravity: self.yvel = max_gravity 
     if not (move.left or move.right): 
      self.xvel = 0 
     self.rect.left += self.xvel 
     self.collide(self.xvel, 0, blocks) 
     self.rect.top += self.yvel 
     self.on_ground = False; 
     self.collide(0, self.yvel, blocks) 

    def collide(self, xvel, yvel, blocks): 
     for block in [blocks[i] for i in self.rect.collidelistall(blocks)]: 
      if xvel > 0: 
        self.rect.right = block.rect.left 
      if xvel < 0: 
        self.rect.left = block.rect.right 

      if yvel > 0: 
       self.rect.bottom = block.rect.top 
       self.on_ground = True 
       self.yvel = 0 
      if yvel < 0: self.rect.top = block.rect.bottom;self.yvel=0 
blocks=[] 
cavemakes=[] 
gen=1 
genx=0 
geny=0 
cavemakes.append(CaveMaker());cavemakes.append(CaveMaker());cavemakes.append(CaveMaker());cavemakes.append(CaveMaker()); 
while True: 
    key=pygame.key.get_pressed() 
    if gen==1: 
     blocks.append(Block(genx,geny)) 
     geny+=16 
     if geny>480: 
      geny=0 
      genx+=16 
      if genx>640: 
       gen=2 
    elif gen==2: 
     screen.fill((5,80,200)) 
     for b in blocks: 
      pygame.draw.rect(screen, (90,90,90), b.rect, 0) 
     for c in cavemakes: 
      if c.active==0: 
       gen='done' 
       player=Player(32,32) 
      c.Update() 
      for b in blocks: 
       if b.rect.colliderect(c.rect): 
        blocks.remove(b) 
     pygame.display.flip() 
    if gen=='done': 
     screen.fill((5,80,200)) 
     for b in blocks: 
      pygame.draw.rect(screen, (90,90,90), b.rect, 0) 
     for e in pygame.event.get(): 
      if e.type==QUIT: 
       exit() 
     move = Move(key[K_w], key[K_a], key[K_d]) 
     player.update(move,blocks) 
     pygame.draw.rect(screen, (5,200,5), player.rect, 3) 
     pygame.display.flip() 

Answer 1

您的代碼

for b in blocks: 
    while b.rect.collidepoint(px,py): 
     px=randrange(1,640) 
     py=randrange(1,480) 

將遍歷每個塊，確保該點不與只是塊重疊。所以你最終的觀點不會與最後一個塊相沖突，但可能與其他塊相沖突。試試：

while any(b.rect.collidepoint(px, py) for b in blocks):