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viz_traj.py
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#!/usr/bin/python
import matplotlib.pyplot as plt
import math
import sys
if len(sys.argv) > 1:
lane_data_file = sys.argv[1]
else:
lane_data_file = "./test_data/lane_data.txt"
smoothed_path = open(lane_data_file + ".traj", 'r')
a_star_path = open(lane_data_file + ".traj.astar", 'r')
# draw smoothed path
x = []
y = []
theta = []
kappa = []
for line in smoothed_path:
point = line.split(',')
x.append(float(point[0]))
y.append(float(point[1]))
theta.append(float(point[2]))
kappa.append(float(point[3]))
plt.subplot(2, 1, 1)
plt.axis('equal')
plt.plot(x, y, 'g-', label='smooted traj')
plt.legend(loc='upper left')
# plt.plot(x, kappa, 'g-')
u = []
v = []
for t in theta:
u.append(0.5 * math.cos(t))
v.append(0.5 * math.sin(t))
plt.quiver(x, y, u, v, angles='uv', color='g', width=0.002)
plt.xlabel('x')
plt.ylabel('y')
plt.subplot(2, 1, 2)
# plt.plot(x, theta, 'g-')
plt.axis('equal')
plt.plot(x, kappa, 'g-', label='smoothed kappa')
plt.legend(loc='upper left')
plt.xlabel('x')
plt.ylabel('kappa')
# draw a-star raw path
x = []
y = []
theta = []
kappa = []
for line in a_star_path:
point = line.split(',')
x.append(float(point[0]))
y.append(float(point[1]))
theta.append(float(point[2]))
kappa.append(float(point[3]))
plt.subplot(2, 1, 1)
plt.axis('equal')
plt.plot(x, y, 'r-', label='hybrid-a-star traj')
plt.legend(loc='upper left')
# plt.plot(x, kappa, 'r--')
u = []
v = []
for t in theta:
u.append(0.5 * math.cos(t))
v.append(0.5 * math.sin(t))
plt.quiver(x, y, u, v, angles='uv', color='r', width=0.002)
plt.subplot(2, 1, 2)
# plt.plot(x, theta)
plt.axis('equal')
plt.plot(x, kappa, 'r-', label='hybrid-a-star kappa')
plt.legend(loc='upper left')
plt.savefig(lane_data_file+".png")
plt.show()