def test_to_tween(self):
tween = Tween(3)
tween.to(9, 11)
self.assertEqual(len(tween), 11)
expected = [3, 3.6, 4.2, 4.8, 5.4, 6.0, 6.6, 7.2, 7.8, 8.4, 9]
for i, v in enumerate(tween):
self.assertEqual(v, expected[i])
self.assertEqual(i, 10)
def test_wait_tween(self):
tween = Tween(5)
tween.wait(10)
self.assertEqual(len(tween), 10)
self.assertEqual(tween.get(0), 5)
self.assertEqual(tween.get(9), 5)
self.assertEqual(tween[0], 5)
self.assertEqual(tween[9], 5)
def test_ease_tween_length_1(self):
tween = Tween(3)
tween.ease(9, 1, test_linear())
self.assertEqual(len(tween), 1)
expected = [9]
for i, v in enumerate(tween):
self.assertAlmostEqual(v, expected[i])
self.assertEqual(i, 0)
def test_ease_tween(self):
tween = Tween(3)
tween.ease(9, 10, test_linear())
self.assertEqual(len(tween), 10)
expected = [3.6, 4.2, 4.8, 5.4, 6.0, 6.6, 7.2, 7.8, 8.4, 9]
for i, v in enumerate(tween):
self.assertAlmostEqual(v, expected[i])
self.assertEqual(i, 9)
def test_to_tween_length_1(self):
tween = Tween(3)
tween.to(9, 1)
self.assertEqual(len(tween), 1)
expected = [9]
for i, v in enumerate(tween):
self.assertAlmostEqual(v, expected[i])
self.assertEqual(i, 0)
def plot_easing_function(ctx, x, y, fn):
tw = Tween(0).ease(-100, 100, fn)
poly = [(i, tw[i]) for i in range(100)]
ctx.save()
ctx.translate(x, y)
Square(ctx).of_corner_size((0, -100), 100).stroke(Color(0.5), 2)
Polygon(ctx).of_points(poly).open().stroke(Color('red'), 2)
ctx.restore()
def test_set_tween(self):
tween = Tween(3)
tween.wait(6)
tween.set(2.5, 8)
self.assertEqual(len(tween), 14)
self.assertEqual(tween.get(0), 3)
self.assertEqual(tween[5], 3)
self.assertEqual(tween[6], 2.5)
self.assertEqual(tween.get(13), 2.5)
expected = [3, 3, 3, 3, 3, 3, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5]
for i, v in enumerate(tween):
self.assertEqual(v, expected[i])
self.assertEqual(i, 13)
def test_empty_tween(self):
tween = Tween()
self.assertEqual(len(tween), 0)
def test_ease_tween_length_0(self):
tween = Tween(3)
tween.ease(9, 0, test_linear())
self.assertEqual(len(tween), 0)
def test_to_tween_length_0(self):
tween = Tween(3)
tween.to(9, 0)
self.assertEqual(len(tween), 0)
from generativepy.tween import Tween
# Create a tween
tween = Tween(3.0).wait(4).to(13.0, 5).wait(2).set(7.0, 4)
# You can use len() to fund the length of the tween in frames
print('Length = ', len(tween))
# You can access the vale#ue for a particular frame using indexing []
# or the get() function.
print('tween[7] = ', tween[5])
print('tween[8] = ', tween.get(7))
# The tween can be accessed as a sequence. Here we use a list
# comprehension to convert the values to strings that print the
# entire sequence
strings = [str(x) for x in tween]
print(', '.join(strings))