pygame精灵的一个实例正在更改整个组位置

时间:2018-09-04 20:36:04

标签: python pygame sprite

只要制作一个简单的游戏就可以实践更多的蚂蚁,如果蚂蚁可以的话,它们会离开并在巢中找到最近的尚未瞄准的食物,因此它们都有自己的路线和目标。他们已经这样做了,但是每当我实际移动精灵时,该组位置属性中的所有精灵似乎都遵循一个蚂蚁而不是它们自己的路径。

import pygame
import settings
import random
vec = pygame.math.Vector2


class Ant(pygame.sprite.Sprite):
def __init__(self, world):
    self.world = world
    pygame.sprite.Sprite.__init__(self, self.world.ants, self.world.all_sprites)
    self.image = pygame.Surface((settings.ANT_RADIUS*2, settings.ANT_RADIUS*2))
    self.draw()
    self.rect = self.image.get_rect()
    self.pos = self.world.nest.pos
    self.rect.center = self.pos
    self.in_nest = True
    self.image.set_colorkey((0, 0, 0))
    self.target = False

def update(self):
    if self.in_nest:
        self.try_leave_nest()
    else:
        if self.target != False:
            self.move_to_food()
        else:
            self.target = self.find_food()

def draw(self):
    pygame.draw.circle(self.image, settings.ANT_COLOUR,
                       (settings.ANT_RADIUS, settings.ANT_RADIUS), settings.ANT_RADIUS)

def move_to_food(self):
    self.direction = vec(self.target.pos-self.pos).normalize()
    self.pos += self.direction
    self.rect.center = self.pos
    print(self.pos)

def find_food(self):
    self.closest = settings.WINDOW_WIDTH
    self.closest_food = False
    for food in self.world.food:
        if not food.taken:
            self.distance = self.pos.distance_to(food.pos)
            if self.distance <= self.closest:
                self.closest = self.distance
                self.closest_food = food
    self.closest_food.taken = True
    return self.closest_food

def try_leave_nest(self):
    leave_chance = settings.ANT_LEAVE_CHANCE
    leave_num = random.random()
    if leave_num < leave_chance:
        self.in_nest = False

1 个答案:

答案 0 :(得分:2)

self.pos = self.world.nest.pos

复制对位置对象的引用,而不是对象本身!

self.pos += self.direction

就地修改对象,这意味着self.world.nest.pos也被修改。