Python Sympy Plane.projection_line()用法及代码示例

在Sympy中，该函数Plane.projection_line()用于将给定线通过包含该线的法线平面投影到给定平面上。

用法： Plane.projection_line(line)

参数：
 line: LinearEntity or LinearEntity3D

返回： Point3D, Line3D, Ray3D or Segment3D

范例1：

# import sympy and Plane, Line, Line3D, Point, Point3D 
from sympy import Plane, Line, Line3D, Point, Point3D 
  
p = Line(Point(1, 2), Point(2, 3)) 
  
# using Plane() 
p1 = Plane(Point3D(1, 2, 3), normal_vector =(1, 0, 1)) 
  
# using projection_line() 
projectionLine = p1.projection_line(p) 
  
print(projectionLine)

输出：

Line3D(Point3D(5/2, 2, 3/2), Point3D(3, 3, 1))

范例2：

# import sympy and Plane, Line, Line3D, Point, Point3D 
from sympy import Plane, Line, Line3D, Point, Point3D 
  
p = Line3D(Point3D(1, 2, 3), Point(0, 0, 0)) 
  
# using Plane() 
p2 = Plane(Point3D(1, 1, 1), normal_vector =(0, 0, 0)) 
  
# using projection_line() 
projectionLine = p2.projection_line(p) 
  
print(projectionLine)

输出：

Line3D(Point3D(1, 2, 3), Point3D(2, 0, 2))

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