用Python实现流星雨效果的方法详解

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.collections import LineCollection

x0,y0 = 1,1     #此为流星位置
ts = np.arange(0,1,0.01)    #参数
xs,ys = x0+ts, y0+ts        #绘图线条

points = np.array([xs, ys]).T.reshape(-1, 1, 2)
segments = np.concatenate([points[:-1], points[1:]], axis=1)

ax = plt.subplot()
lc = LineCollection(segments, cmap='viridis')

lc.set_array(ts)
lc.set_linewidth(ts[::-1])
line = ax.add_collection(lc)

ax.set_xlim(0, 3)
ax.set_ylim(0, 3)
plt.show()

from numpy.random import rand, randint
N,L = 20,100  #流星个数和线段数
ts = np.array([
    np.linspace(0,rand(),L) for _ in range(N)]).T
x0,y0 = rand(2*N).reshape(2,1,N)
x0 *= 5
xs,ys = x0+ts, y0+ts #绘图线条1

points = np.array([xs, ys]).T.reshape(N,L,-1,2)

ax = plt.subplot()
for i in range(N):
    segs = np.concatenate([points[i][:-1], points[i][1:]], axis=1)
    lc = LineCollection(segs, cmap='viridis')
    lc.set_array(ts[:,i])
    lc.set_linewidth(ts[::-1,i])
    ax.add_collection(lc)

ax.set_xlim(0, 6)
ax.set_ylim(-2, 3)
ax.set_axis_off()                      #取消坐标轴
plt.show()

plt.figure(facecolor="black")          #将背景设为黑色

lc = LineCollection(segs, cmap='viridis_r')