def internal_test_tricky(self):
epsilon = 0.001
delta = math.sqrt(2 * epsilon - epsilon**2);
p1 = Vector2D(0.0, -1.0);
p2 = Vector2D(-1.0+epsilon, 0.9 * delta);
p3 = Vector2D(-math.cos(0.25*math.pi) + epsilon, math.sin(0.25*math.pi) - epsilon);
thelist = [p1, p2, p3];
gravity_centre = find_gravity_centre(thelist);
zero_point = Vector2D(.0, .0);
while gravity_centre.sub(zero_point).norm() > 0.001:
opposite_point = gravity_centre.inverted();
thelist.append(opposite_point);
thelist.append(opposite_point);
thelist.append(opposite_point);
gravity_centre = find_gravity_centre(thelist);
circle1, pivot_points1 = find_smallest_circle_directly(thelist);
circle2, pivot_point2 = find_smallest_circle_sqtime(thelist);
self.assertEqual(round(circle1.centre.get_x(), 3), round(circle2.centre.get_x(), 3));
self.assertEqual(round(circle1.centre.get_y(), 3), round(circle2.centre.get_y(), 3));
self.assertEqual(round(circle1.radius, 3), round(circle2.radius, 3));
def button_press_callback(event):
global list_of_points, circle1, circle2
if event.button != 1:
backup1, backup2 = circle1, circle2
circle1, pivot_points1 = find_smallest_circle_directly(list_of_points)
circle2, pivot_points2 = find_smallest_circle_sqtime(list_of_points)
print str(len(list_of_points)) + " points"
if circle1 is not None:
circle1 = circle_to_plt(circle1)
if backup1 is not None:
backup1.remove()
plt.gcf().gca().add_artist(circle1)
if circle2 is not None:
circle2 = circle_to_plt(circle2)
if backup2 is not None:
backup2.remove()
plt.gcf().gca().add_artist(circle2)
else:
list_of_points.append(Vector2D(event.xdata, event.ydata))
drawable_point = plt.Line2D((event.xdata, event.xdata), (event.ydata, event.ydata), marker='o', color='r')
plt.gcf().gca().add_artist(drawable_point)
plt.show()
def internal_test_from_file(self, file_name, test_by_pivots = False):
thelist = read_list_of_points(file_name);
circle1, pivot_points1 = find_smallest_circle_directly(thelist);
circle2, pivot_points2 = find_smallest_circle_sqtime(thelist);
if test_by_pivots:
p1_in_p2 = all(p in pivot_points1 for p in pivot_points2)
p2_in_p1 = all(p in pivot_points2 for p in pivot_points1)
self.assertTrue(p1_in_p2)
self.assertTrue(p2_in_p1)
else:
self.assertEqual(round(circle1.centre.get_x(), 3), round(circle2.centre.get_x(), 3));
self.assertEqual(round(circle1.centre.get_y(), 3), round(circle2.centre.get_y(), 3));
self.assertEqual(round(circle1.radius, 3), round(circle2.radius, 3));
def internal_test_random(self, number_of_points, test_by_pivots = False):
thelist = list();
for i in range(number_of_points):
thelist.append(Vector2D(random.uniform(-10.0, 10.0), random.uniform(-10.0, 10.0)));
write_list_of_points(thelist, "RandomPoints.txt");
circle1, pivot_points1 = find_smallest_circle_directly(thelist);
circle2, pivot_points2 = find_smallest_circle_sqtime(thelist);
if test_by_pivots:
p1_in_p2 = all(p in pivot_points1 for p in pivot_points2)
p2_in_p1 = all(p in pivot_points2 for p in pivot_points1)
self.assertTrue(p1_in_p2)
self.assertTrue(p2_in_p1)
else:
self.assertEqual(round(circle1.centre.get_x(), 3), round(circle2.centre.get_x(), 3));
self.assertEqual(round(circle1.centre.get_y(), 3), round(circle2.centre.get_y(), 3));
self.assertEqual(round(circle1.radius, 3), round(circle2.radius, 3));
def test_find_smallest_circle_sqtime(self):
thelist = [Vector2D(1.0, 0.0), Vector2D(.5, .5), Vector2D(-1.0, -0.25)];
circle1, pivot_points = find_smallest_circle_directly(thelist);
circle2, pivot_point2 = find_smallest_circle_sqtime(thelist);
self.assertEqual(circle1.centre.get_x(), 0.0);
self.assertEqual(circle1.centre.get_y(), -0.125);
self.assertEqual(circle1.radius, 1.0077822185373186);
self.assertEqual(circle2.centre.get_x(), 0.0);
self.assertEqual(circle2.centre.get_y(), -0.125);
self.assertEqual(circle2.radius, 1.0077822185373186);
self.internal_test_tricky(); print "Tricky test passed"
self.internal_test_from_file("TestCase0.txt"); print "File test passed"
self.internal_test_from_file("TestCase0.txt", test_by_pivots=True); print "File test passed"
self.internal_test_from_file("TestCase1.txt"); print "File test passed"
self.internal_test_from_file("TestCase1.txt", test_by_pivots=True); print "File test passed"
self.internal_test_from_file("TestCase2.txt"); print "File test passed"
self.internal_test_from_file("TestCaseBig.txt"); print "File test passed"
self.internal_test_from_file("TestCase3.txt", test_by_pivots=True); print "File test passed"
self.internal_test_from_file("TestCase4.txt", test_by_pivots=True); print "File test passed"
self.internal_test_from_file("TestCase5.txt", test_by_pivots=True); print "File test passed"
