橢圓的光學性質
Author: 藍邦偉  老師

橢圓的光學性質
移動P點觀察α與β

C = (-15.921413545466406, -22.8386722420377)
P = Point(c)
F' = (-4, 0)
a = Segment(P, F')
F = (4, 0)
b = Segment(P, F)
d = Tangent(P, c)
e = OrthogonalLine(P, d)
A = Point(e)
α = Angle(A, P, F)
β = Angle(F', P, A)
P_1: (x(Corner[1.0]), 0.0)
P_2: (x(Corner[2.0]), 0.0)
P_3: (0.0, y(Corner[2.0]))
P_4: (0.0, y(Corner[3.0]))
u = Vector(P_1, P_2)
v = Vector(P_3, P_4)
T_1 = Corner(1.0)
T_4 = Corner(4.0)
T_2: (7.0 * Corner[1.0] + 2.0 * Corner[2.0]) / 9.0
T_3: (7.0 * Corner[4.0] + 2.0 * Corner[3.0]) / 9.0
多邊形1, t_1, t_2, t_3, t_4 = Polygon(T_1, T_2, T_3, T_4)
f = Segment(T_2, T_3)