Python | Sympy 椭圆()方法
原文:https://www.geeksforgeeks.org/python-sympy-ellipse-method/
In sympy, the function Ellipse()
is used to create ellipse from a center and two radii, the first being the horizontal radius (along the x-axis) and the second being the vertical radius (along the y-axis).
语法:椭圆()
参数: 中心:点 hradius: 数字或 SymPy 表达式,可选 vradius: 数字或 SymPy 表达式,可选 偏心率:数字或 SymPy 表达式,可选
错误:当 hradius、vradius 和偏心率不正确地作为参数提供时,会引发几何错误;当中心不是点时,会引发类型错误。
示例#1:使用中心和半径
# import sympy and geometry module
from sympy.geometry import Point, Ellipse
# using Ellipse()
e1 = Ellipse(Point(0, 0), 5, 1)
print(e1.hradius,e1.vradius)
输出:
(5,1)
例 2:使用中心、半径和偏心
# import sympy and geometry module
from sympy.geometry import Point, Ellipse, Rational
# using Ellipse()
e2 = Ellipse(Point(3, 1), hradius=3, eccentricity=Rational(4, 5))
print(e2)
输出:
Ellipse(Point2D(3, 1), 3, 9/5)
例#3:使用中心、虚拟和偏心
# import sympy and geometry module
from sympy.geometry import Point, Ellipse, Rational
# using Ellipse()
e2 = Ellipse(Point(3, 1), vradius=3, eccentricity=Rational(4, 5))
print(e2)
输出:
Ellipse(Point2D(3, 1), 5, 3)