使用 VPython 制作椭圆体

VPython可以轻松创建可导航的 3D 显示和动画，即使对于那些编程经验有限的人来说也是如此。因为它是基于Python的，所以它也为有经验的程序员和研究人员提供了很多东西。 VPython 允许用户在 3D 空间中创建球体和圆锥体等对象，并将这些对象显示在窗口中。这使得创建简单的可视化变得容易，使程序员可以更多地关注他们程序的计算方面。 VPython 的简单性使其成为说明简单物理的工具，尤其是在教育环境中。
安装 ：

pip install vpython

椭圆体是三维空间中的几何对象，其中所有平面横截面都是椭圆或圆形，形成一个封闭的表面。我们可以使用 ellipsoid() 方法在 VPython 中生成一个椭圆体。

椭圆体（）

Syntax : ellipsoid(parameters)
Parameters : 
 

• pos : It is the position of the center of the ellipsoid. Assign a vector containing 3 values, example pos = vector(0, 0, 0)
• axis : It is the axis of alignment of the ellipsoid. Assign a vector containing 3 values, example axis = vector(1, 2, 1)
• up : It is the orientation of the ellipsoid. Assign a vector containing 3 values, example up = vector(0, 1, 0)
• color : It is the color of the ellipsoid. Assign a vector containing 3 values, example color = vector(1, 1, 1) will give the color white
• opacity : It is the opacity of the ellipsoid. Assign a floating value in which 1 is the most opaque and 0 the least opaque, example opacity = 0.5
• shininess : It is the shininess of the ellipsoid. Assign a floating value in which 1 is the most shiny and 0 the least shiny, example shininess = 0.6
• emissive : It is the emissivity of the ellipsoid. Assign a boolean value in which True is emissive and False is not emissive, example emissivity = False
• texture : It is the texture of the ellipsoid. Assign the required texture from the textures class, example texture = textures.stucco
• length : It is the length of the ellipsoid in x direction. Assign a floating value, the default length is 1, example length = 10
• height : It is the height of the ellipsoid in y direction. Assign a floating value, the default height is 1, example height = 8
• width : It is the width of the ellipsoid in z direction. Assign a floating value, the default width is 1, example width = 5
• size : It is the size of the ellipsoid. Assign a vector containing 3 values representing the length, height and width respectively, example size = vector(1, 1, 1)

All the parameters are optional. 
 

示例 1：一个没有参数的椭球，所有参数都将具有默认值。

Python3

# import the module
from vpython import * ellipsoid()

输出 ：

示例 2：使用参数颜色、不透明度、光泽度和发射率的椭圆体。

Python3

# import the module
from vpython import * ellipsoid(color = vector(0.4, 0.2, 0.6),
          opacity = 0.5,
          shininess = 1,
          emissive = False)

输出 ：

示例 3：显示 2 个椭圆体以可视化属性 pos、length、height 和 width。

Python3

# import the module
from vpython import *
 
# the first ellipsoid
ellipsoid(pos = vector(-2, 2, 0),
           length = 3,
           height = 2,
           width = 2,
           color = vector(1, 0.6, 0))
  
# the second ellipsoid
ellipsoid(pos = vector(1, -1, 5),
          width = 3,
           color = vector(0, 1, 0))

输出 ：

示例 4：使用参数纹理、轴和向上的椭圆体。

Python3

# import the module
from vpython import * ellipsoid(texture = textures.stucco,
          axis = vector(-1, 4, 0),
          up = vector(1, 2, 2),
          length = 3)

输出 ：