def test_90_degree_rotation(self):
point = (1, 0)
degrees = 90
expected = (0, 1)
result = math_utils.rotate_point(point, degrees)
self.assertAlmostEqual(expected[0], result[0], places=10)
self.assertAlmostEqual(expected[1], result[1], places=10)
def test_45_degree_rotation(self):
point = (1, 0)
degrees = 45
expected = (math.sqrt(2) / 2, math.sqrt(2) / 2)
result = math_utils.rotate_point(point, degrees)
self.assertAlmostEqual(expected[0], result[0], places=10)
self.assertAlmostEqual(expected[1], result[1], places=10)
def test_0_degree_rotation_around_point(self):
point = (5, 3)
center_point = (3, 3)
degrees = 0
expected = (5, 3)
result = math_utils.rotate_point(point, degrees, center_point)
self.assertAlmostEqual(expected[0], result[0], places=10)
self.assertAlmostEqual(expected[1], result[1], places=10)
def rotate(self, degrees):
coords = []
center_point = (self.center.x, self.center.y)
old_p1 = (self.p1.x, self.p1.y)
old_p2 = (self.p2.x, self.p2.y)
new_p1 = math_utils.rotate_point(old_p1, degrees, center_point)
new_p2 = math_utils.rotate_point(old_p2, degrees, center_point)
self.p1 = Point(new_p1[0], new_p1[1])
self.p2 = Point(new_p2[0], new_p2[1])
# need to convert to screen coordinates when rendering to screen
screen_p1_x, screen_p1_y = self.canvas.toScreen(new_p1[0], new_p1[1])
screen_p2_x, screen_p2_y = self.canvas.toScreen(new_p2[0], new_p2[1])
coords = [screen_p1_x, screen_p1_y, screen_p2_x, screen_p2_y]
try:
self.canvas.coords(self.id, coords)
except tk.TclError:
sys.exit()
def rotate(self, degrees):
center_point = (self.center.x, self.center.y)
self.points = [
math_utils.rotate_point(point, degrees, center_point)
for point in self.points
]
screen_point_tuples = [
self.canvas.toScreen(point[0], point[1]) for point in self.points
]
coords = list(itertools.chain.from_iterable(screen_point_tuples))
self.canvas.coords(self.id, coords)