有向角
Author: 藍邦偉  老師

有向角

θ

O: 0.5 * (Corner[1.0] + Corner[3.0])
u = Vector(O, (x(Corner[3.0]), y(O)))
v = Vector((x(O), y(Corner[1.0])), (x(O), y(Corner[3.0])))
A: O + (2.5, 0.0)
A_1: 0.8 * O + 0.2 * A
w = Vector(O, A)
g = Circle(O, A)
r = Segment(O, A)
L_1 = Sequence(O + (r * cos(2.0 * k * 3.141592653589793 / 72.0), r * sin(2.0 * k * 3.141592653589793 / 72.0)), k, 1.0, 72.0)
L_2 = Sequence(Segment[O, O + (r * cos(2.0 * k * 3.141592653589793 / 72.0), r * sin(2.0 * k * 3.141592653589793 / 72.0))], k, 1.0, 72.0)
a = -0.8 (slider from -5 to 5, step 0.05)
Q_1: O + (2.5 * cos(2.0 * a * 3.141592653589793), 2.5 * sin(2.0 * a * 3.141592653589793))
z = Vector(O, Q_1)
α = Angle(A, O, Q_1)
文字2: "目前角度θ=" + (360.0 * a) + "°"