def __init__(self, name,
relative_pos=Vector2D(0, 0),
chord_length=1,
angle=Angle(0),
area=1,
lift_curve=None,
drag_curve=None,
atmosphere=Atmosphere()):
self._point = Point(relative_pos)
self.name = name
self.angle = angle
self.area = area
self._atmosphere = atmosphere
self.lift_curve = lift_curve
self.drag_curve = drag_curve
if lift_curve is not None:
stall_angle = lift_curve.stall_angle()
else:
stall_angle = None
self.cp = CP(relative_pos, chord_length, stall_angle)
self.velocity = Vector2D(0, 0)
self.current_cp = Vector2D(0, 0)
def test_0_length(self):
cp = CP(Vector2D(1, 0), 0, Angle(10))
calculated = cp.calculate(Angle(1))
self.assertEqual(1, calculated.x)
def test_backward_upsidedown(self):
cp = CP(Vector2D(1, 0), 12, Angle(10))
calculated = cp.calculate(Angle(-175))
self.assertEqual(-8, calculated.x)
def test_backward_upsidedown_stalled(self):
cp = CP(Vector2D(1, 0), 12, Angle(10))
calculated = cp.calculate(Angle(-130))
self.assertEqual(-6.5, calculated.x)
def test_down_vertical(self):
cp = CP(Vector2D(1, 0), 12, Angle(10))
calculated = cp.calculate(Angle(-90))
self.assertEqual(-5, calculated.x)
def test_down_stalled(self):
cp = CP(Vector2D(1, 0), 12, Angle(10))
calculated = cp.calculate(Angle(-50))
self.assertEqual(-3.5, calculated.x)
def test_just_past_vertical(self):
cp = CP(Vector2D(1, 0), 12, Angle(10))
calculated = cp.calculate(Angle(91))
self.assertEqual(-5.0375, calculated.x)
def test_normal(self):
cp = CP(Vector2D(1, 0), 12, Angle(10))
calculated = cp.calculate(Angle(1))
self.assertEqual(-2, calculated.x)
def test_null_angle(self):
cp = CP(Vector2D(1, 0), 12, None)
calculated = cp.calculate(Angle(1))
self.assertEqual(1, calculated.x)