Python | Sympy Ellipse.tangent_lines method
Last Updated :
30 Jan, 2020
In Sympy, the function
tangent_lines()
returns Tangent lines between p(point) and the ellipse.
If p is on the ellipse, returns the tangent line through point p. Otherwise, returns the tangent line(s) from p to the ellipse, or None if no tangent line is possible (e.g., p inside ellipse).
Syntax: Ellipse.tangent_lines(p)
Parameter:
p:Point
Returns:
tangent_lines: list with 1 or 2 Lines or empty list
Raises:
NotImplementedError: Can only find tangent lines for a point, p, on the ellipse.
Example #1:
from sympy import Point, Ellipse
e1 = Ellipse(Point( 0 , 0 ), 3 , 2 )
l1 = e1.tangent_lines(Point( 3 , 0 ))
print (l1)
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Output:
[Line2D(Point2D(3, 0), Point2D(3, -12))]
Example #2:
from sympy import Point, Ellipse
e2 = Ellipse(Point( 0 , 0 ), 3 , 2 )
l2 = e2.tangent_lines(Point( 1 , 1 ))
print (l2)
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Output:
[]
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