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https://github.com/zhm-real/PathPlanning.git
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zhm-real
56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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@author: huiming zhou
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"""
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import matplotlib.pyplot as plt
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def extract_path(xI, xG, parent, actions):
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"""
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Extract the path based on the relationship of nodes.
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:param xI: Starting node
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:param xG: Goal node
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:param parent: Relationship between nodes
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:param actions: Action needed for transfer between two nodes
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:return: The planning path
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"""
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path_back = [xG]
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acts_back = [actions[xG]]
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x_current = xG
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while True:
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x_current = parent[x_current]
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path_back.append(x_current)
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acts_back.append(actions[x_current])
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if x_current == xI: break
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return list(reversed(path_back)), list(reversed(acts_back))
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def showPath(xI, xG, path):
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"""
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Plot the path.
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:param xI: Starting node
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:param xG: Goal node
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:param path: Planning path
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:return: A plot
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"""
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path.remove(xI)
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path.remove(xG)
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path_x = [path[i][0] for i in range(len(path))]
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path_y = [path[i][1] for i in range(len(path))]
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plt.plot(path_x, path_y, linewidth='5', color='r', linestyle='-')
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plt.pause(0.001)
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plt.show()
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def plot_dots(x, length):
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plt.plot(x[0], x[1], linewidth='3', color='#808080', marker='o')
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plt.gcf().canvas.mpl_connect('key_release_event',
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lambda event: [exit(0) if event.key == 'escape' else None])
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if length % 15 == 0:
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plt.pause(0.001)
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