Python | Sympy 椭圆.切线 _ 直线法
原文:https://www . geesforgeks . org/python-sympy-ellipse-tangent _ lines-method/
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.
示例#1:
# import sympy and Point, Ellipse
from sympy import Point, Ellipse
# using Ellipse() method
e1 = Ellipse(Point(0, 0), 3, 2)
# using tangent_lines() method
l1 = e1.tangent_lines(Point(3, 0))
print(l1)
输出:
[Line2D(Point2D(3, 0), Point2D(3, -12))]
示例#2:
# import sympy and Point, Ellipse
from sympy import Point, Ellipse
# using Ellipse() method
e2 = Ellipse(Point(0, 0), 3, 2)
# using tangent_lines() method
l2 = e2.tangent_lines(Point(1, 1))
print(l2)
输出:
[]
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