使用 VPython 制作螺旋线
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，允许程序员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螺旋是三维空间中的几何对象，其形状像开瓶器或螺旋楼梯。它是一种平滑的空间曲线，切线与固定轴成恒定角度。我们可以使用helix()方法在VPython中生成一个螺旋。
螺旋（）
Syntax : helix(parameters)
Parameters :
- pos : It is the position of the center of one end of the helix. Assign a vector containing 3 values, example pos = vector(0, 0, 0)
- axis : It is the axis of alignment of the helix. Assign a vector containing 3 values, example axis = vector(1, 2, 1)
- color : It is the color of the helix. Assign a vector containing 3 values, example color = vector(1, 1, 1) will give the color white
- opacity : It is the opacity of the helix. 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 helix. 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 helix. Assign a boolean value in which True is emissive and False is not emissive, example emissivity = False
- length : It is the length of the texture = textures.stucco. Assign a floating value, the default length is 1, example length = 10
- radius : It is the radius of the helix. Assign a floating value, the default radius is 1, example radius = 5
- coils : It is the number of coils in the helix. Assign an integer value, the default coils are 5, example coils = 9
- thickness : It is the diameter of the cross section of the curve used to draw the helix. Assign an floating value, the default thickness is radius/20, example thickness = 1
- size : It is the size of the helix. 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：没有参数的螺旋，所有参数都将具有默认值。
# import the module
from vpython import * helix()
输出 ： 
示例 2：使用参数颜色、不透明度、光泽度和发射率的螺旋线。
# import the module
from vpython import * cone(color = vector(0, 1, 1),
opacity = 0.5,
shininess = 1,
emissive = False)
输出 ： 
示例 3：显示 2 个螺旋以可视化属性 pos、长度、半径、线圈和厚度。
# import the module
from vpython import *
# the first helix
helix(pos = vector(-2, 2, 0),
length = 3,
radius = 1,
coils = 10,
thickness = 0.5,
color = vector(0.5, 0, 0))
# the second helix
helix(pos = vector(1, -1, 5),
color = vector(0, 1, 0),
coils = 20)
输出 ： 
示例 4：使用参数轴和大小的螺旋线。
# import the module
from vpython import * helix(axis = vector(-1, 4, 0),
size = vector(1, 2, 2))
输出 ： 
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