48 lines
2.0 KiB
Python
48 lines
2.0 KiB
Python
import random
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class Snake():
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def __init__(self, settings):
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self.reset(settings)
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# 蛇的初始化
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def reset(self, settings):
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# 蛇头的坐标
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self.start_x = 5#random.randint(5, settings.cell_w - 6)
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self.start_y = 5#random.randint(5, settings.cell_h - 6)
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self.head_index = 0
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# 蛇的初始运动方向
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self.direction = 'right'
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# 蛇的初始坐标字典，初始蛇为蛇头位置及其左边的两个格子
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self.coords = [{'x': self.start_x, 'y': self.start_y},
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{'x': self.start_x - 1, 'y': self.start_y},
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{'x': self.start_x - 2, 'y': self.start_y}]
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# 更新蛇，每次蛇移动一步，因此相当于每次移动在蛇的坐标字典中再插入一个新蛇头
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# 按常识，每次移动后，不仅仅是蛇头向前移动一个，更重要的是蛇尾也要向前移，但是在该函数中先不处理蛇尾
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# 因为如果蛇吃了食物，此时蛇尾其实并没有移动
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def move_head(self):
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newHead = {}
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# 根据移动方向确定蛇头
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if self.direction == 'up':
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newHead = {'x': self.coords[self.head_index]['x'],
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'y': self.coords[self.head_index]['y'] - 1}
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elif self.direction == 'down':
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newHead = {'x': self.coords[self.head_index]['x'],
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'y': self.coords[self.head_index]['y'] + 1}
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elif self.direction == 'left':
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newHead = {'x': self.coords[self.head_index]['x'] - 1,
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'y': self.coords[self.head_index]['y']}
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elif self.direction == 'right':
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newHead = {'x': self.coords[self.head_index]['x'] + 1,
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'y': self.coords[self.head_index]['y']}
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self.coords.insert(0, newHead)
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def create_iterator(self,path):
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def automove_head():
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for newhead in path:
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self.coords.insert(0, newhead)
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return automove_head
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def automove_head(self,ai):
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ai.iterator() |