Hexagon不顯示

Question

我的代碼存在問題，即時嘗試繪製六角形多邊形，但第n個顯示出來。當我嘗試使用eclipse或其他pygame.draw函數它沒問題，問題是多邊形。這是我的代碼。我覺得整個程序工作正常，問題就在這裏：

hexagon = Hexagon.hexagon_generator(40,self.rect.x,self.rect.y) 
pygame.draw.polygon(self.image,(0,225,0),list(hexagon),0) 

整個程序：

import pygame 
import random 
import Hexagon 

BLACK = (0, 0, 0) 
WHITE = (255, 255, 255) 
RED = (255, 0, 0) 

class Player(pygame.sprite.Sprite): 
    def __init__(self,x,y): 
     super().__init__() 
     self.image = pygame.Surface([100,100]) 
     self.rect = self.image.get_rect() 
     self.image.fill(WHITE) 
     self.image.set_colorkey(WHITE) 
     self.rect.x = x 
     self.rect.y = y 
     hexagon = Hexagon.hexagon_generator(40,self.rect.x,self.rect.y) 
     pygame.draw.polygon(self.image,(0,225,0),list(hexagon),0) 

     self.velocity_y = 0 
     self.velocity_x = 0 

    def move(self, x, y): 
     self.velocity_x += x 
     self.velocity_y += y 

    def update(self): 
     self.rect.x += self.velocity_x 
     self.rect.y += self.velocity_y 
     if self.rect.x >785: 
      self.rect.x =785 
     elif self.rect.x <0: 
      self.rect.x =0 
     elif self.rect.y > 585: 
      self.rect.y = 585 
     elif self.rect.y < 0: 
      self.rect.y = 0 
     elif self.rect.x<0 and self.rect.y < 0: 
      self.rect.x = 0 
      self.rect.y = 0 

pygame.init() 
screen_width = 800 
screen_height = 600 
screen = pygame.display.set_mode([screen_width, screen_height]) 
all_sprites_list = pygame.sprite.Group() 

player = Player(200,200) 
all_sprites_list.add(player) 
done = False 
clock = pygame.time.Clock() 

while not done: 
    for event in pygame.event.get(): 
     if event.type == pygame.QUIT: 
      done = True 
     if event.type == pygame.KEYDOWN: 
      if event.key == pygame.K_DOWN: 
       player.move(0,5) 
      if event.key == pygame.K_UP: 
       player.move(0, -5) 
      if event.key == pygame.K_LEFT: 
       player.move(-5, 0) 
      if event.key == pygame.K_RIGHT: 
       player.move(5, 0) 
     if event.type == pygame.KEYUP: 
      if event.key == pygame.K_DOWN: 
       player.move(0, -5) 
      if event.key == pygame.K_UP: 
       player.move(0, 5) 
      if event.key == pygame.K_LEFT: 
       player.move(5, 0) 
      if event.key == pygame.K_RIGHT: 
       player.move(-5, 0) 

    screen.fill(WHITE) 
    all_sprites_list.update() 

    all_sprites_list.draw(screen) 

    pygame.display.flip() 
    clock.tick(60) 

pygame.quit() 

有一個六邊形模塊：

import math 

def hexagon_generator(edge_length, x,y): 
    for angle in range(0, 360, 60): 
     x += math.cos(math.radians(angle)) * edge_length 
     y += math.sin(math.radians(angle)) * edge_length 
     yield x, y 

Answer 1

如果打印值是hexagon_generator產量，你會看到點在圖像外（其大小爲100 * 100像素）。

[(240.0, 200.0), (260.0, 234.64101615137753), (240.0, 269.28203230275506), (200.0, 269.28203230275506), (179.99999999999997, 234.64101615137753), (199.99999999999997, 200.0)] 

您不應該使用球員的世界座標作爲開始x, y值。如果六邊形應該居中，你可以通過圖像的一半邊長到發電機並將其添加到x和y：

def hexagon_generator(edge_length): 
    for angle in range(0, 360, 60): 
     x = math.cos(math.radians(angle)) * edge_length + edge_length 
     y = math.sin(math.radians(angle)) * edge_length + edge_length 
     yield x, y