三角測量 (21)
Author: 藍邦偉  老師

West

East

South

North

三角測量(21)

θ = 4.974188368183839 rad (slider from 0 to 6.283185307179586, step 0.017453292519943295)
O = (-1.3800000000000001, 3.2200000000000024)
O_1: (x(Corner[1.0]) + 1.0, y(O))
O_2: (x(Corner[2.0] - 1.0), y(O))
O_3: (x(O), y(Corner[2.0] + 1.0))
O_4: (x(O), y(Corner[4.0] - 1.0))
u = Vector(O_1, O_2)
v = Vector(O_3, O_4)
A: O + (4.0 * cos(θ), 4.0 * sin(θ))
A_1: A + (1.0, 0.0)
A_2: A + (0.0, 1.0)
A_3: A + (-1.0, 0.0)
A_4: A - (0.0, 1.0)
b = Segment(A_1, A_3)
a = Segment(A_4, A_2)
φ = 1.0471975511965976 rad (slider from 0 to 6.283185307179586, step 0.017453292519943295)
L: y - y(A) = tan(φ) * (x - x(A))
d: y = y(Corner[3.0]) - 1.0
P = Intersect(L, d)
t = 0.299 (slider from 0 to 1, step 0.0010)
Q: A + t * Vector[A, P]
Q_1: Q + (1.0, 0.0)
Q_3: Q - (1.0, 0.0)
Q_2: Q + (0.0, 1.0)
Q_4: Q - (0.0, 1.0)
f = Segment(Q_1, Q_3)
g = Segment(Q_2, Q_4)
h = OrthogonalLine(O, L)
B = Intersect(L, h)
i = Segment(O, B)
r = 1 (slider from 1 to 4, step 0.1)
c = Circle(A, r)
n = 2 (slider from 0 to 2, step 1)
r' = 0.5 (slider from 0.1 to 1, step 0.1)
e = Circle(Q, r')