目录

• 1、原材料
• 1.1 花灯纸
• 2.2 Python环境和模块
• 2、源代码
• 3、效果

1、原材料

1.1 花灯纸

如下所示，还可以加上自己喜欢的图案、文字等。

2.2 Python环境和模块

一台安装了Python环境的电脑，Python环境需要安装以下模块。

numpy
pillow
wxgl

如果没有上述模块，请参考下面的命令安装。

pip install numpy
pip install pillow
pip install wxgl

2、源代码

#元宵节就要到了，花灯要不要来一盏？3D的那种
# -*- coding: utf-8 -*-
import numpy as np
from PIL import Image
import wxgl.wxplot as plt
 
im = np.array(Image.open('D:/Lantern/venv/res/paper.png'))/255
rows, cols, deep = im.shape
#np.pi=π rows=灯笼高  cols=灯笼底圆的周长
r, h = 1, 2*np.pi*rows/cols
# r=1.5 h=2.66
#制作半径1个单位、高度2.668个单位的圆筒状龙骨了。
#将0到2π分成942份
theta = np.linspace(0, 2*np.pi, cols)
x = r*np.cos(theta)
y = r*np.sin(theta)
#将0到h=2.66分成400份
z = np.linspace(0, h, rows)
xs = np.tile(x, (rows,1))
ys = np.tile(y, (rows,1))
zs = z.repeat(cols).reshape((rows,cols))
xs1 = np.tile(x, (rows,1))+3
xs2 = np.tile(x, (rows,1))-3
ys1 = np.tile(y, (rows,1))+3
ys2 = np.tile(y, (rows,1))-3
#制作旋转叶轮
theta = np.linspace(0, 2*np.pi, 18, endpoint=False)
x[2::3] = x[1::3]
x[1::3] = 0
y[2::3] = y[1::3]
y[1::3] = 0
z = np.ones(18) * h * 0.9
vs = np.stack((x,y,z), axis=1)
vs1 = np.stack((x+3,y,z), axis=1)
vs2 = np.stack((x-3,y,z), axis=1)
vs3 = np.stack((x,y+3,z), axis=1)
vs4 = np.stack((x,y-3,z), axis=1)
#每隔10个点抽取1个点，用mesh的方法画出龙骨形状
plt.mesh(xs, ys, zs, im[::-1])
plt.mesh(xs1, ys, zs, im[::-1])
plt.mesh(xs2, ys, zs, im[::-1])
plt.mesh(xs, ys1, zs, im[::-1])
plt.mesh(xs, ys2, zs, im[::-1])
#旋转叶轮画成红色
plt.surface(vs, color='#C03000', method='T', mode='FCBL', alpha=0.8)
plt.surface(vs1, color='#C03000', method='T', mode='FCBL', alpha=0.8)
plt.surface(vs2, color='#C03000', method='T', mode='FCBL', alpha=0.8)
plt.surface(vs3, color='#C03000', method='T', mode='FCBL', alpha=0.8)
plt.surface(vs4, color='#C03000', method='T', mode='FCBL', alpha=0.8)
#白色照明灯
plt.sphere((0,0,h*0.4), 0.4, '#FFFFFF', slices=60, mode='FCBC')
plt.sphere((3,0,h*0.4), 0.4, '#FFFFFF', slices=60, mode='FCBC')
plt.sphere((-3,0,h*0.4), 0.4, '#FFFFFF', slices=60, mode='FCBC')
plt.sphere((0,3,h*0.4), 0.4, '#FFFFFF', slices=60, mode='FCBC')
plt.sphere((0,-3,h*0.4), 0.4, '#FFFFFF', slices=60, mode='FCBC')
#红线灯笼线
plt.plot((0,0), (0,0), (0.4*h, 1.5*h), width=3.0, style='solid', cmap='hsv', caxis='z')
plt.plot((3,3), (0,0), (0.4*h, 1.5*h), width=3.0, style='solid', cmap='hsv', caxis='z')
plt.plot((-3,-3), (0,0), (0.4*h, 1.5*h), width=3.0, style='solid', cmap='hsv', caxis='z')
plt.plot((0,0), (3,3), (0.4*h, 1.5*h), width=3.0, style='solid', cmap='hsv', caxis='z')
plt.plot((0,0), (-3,-3), (0.4*h, 1.5*h), width=3.0, style='solid', cmap='hsv', caxis='z')
print(plt.title.__doc__)
#红色标题
plt.title(text='元宵节快乐！', size=64, color='red', pos=(0,0,0),align='center',weight='bold')
plt.show(rotation='h-')

3、效果