def corner(self, prev_dir, curr_dir):
# bezier circle estimate
kappa = 4 * (math.sqrt(2) - 1) / 3
final = pointwise('add', self.moves[prev_dir], self.moves[curr_dir])
control1 = pointwise('mul', kappa, self.moves[prev_dir])
control2 = pointwise('sub', final,
pointwise('mul', 1 - kappa, self.moves[curr_dir]))
replacements = pointwise('div', control1 + control2 + final, 2.0)
return 'c %s,%s %s,%s %s,%s ' % tuple(replacements)
def corner(self, prev_dir, curr_dir):
# bezier circle estimate
kappa = 4 * (math.sqrt(2) - 1) / 3
final = pointwise('add', self.moves[prev_dir], self.moves[curr_dir])
control1 = pointwise('mul', kappa, self.moves[prev_dir])
control2 = pointwise('sub', final,
pointwise('mul', 1 - kappa, self.moves[curr_dir]))
replacements = pointwise('div', control1 + control2 + final, 2.0)
return 'c %s,%s %s,%s %s,%s ' % tuple(replacements)
def can_move(self, pos, direction):
# we always keep the blob on the right
n1 = self.neighbours[direction]
n2 = self.neighbours[(direction + 1) % self.n_directions]
value1 = self.get_value(*pointwise('add', pos, n1))
value2 = self.get_value(*pointwise('add', pos, n2))
return (value1 == 0 and value2 == 1)
def can_move(self, pos, direction):
# we always keep the blob on the right
n1 = self.neighbours[direction]
n2 = self.neighbours[(direction + 1) % self.n_directions]
value1 = self.get_value(*pointwise('add', pos, n1))
value2 = self.get_value(*pointwise('add', pos, n2))
return (value1 == 0 and value2 == 1)
def start_draw(self, pos, direction):
start = pointwise('add', pos,
pointwise('div', self.moves[direction], 2.0))
return '<path d="M %s %s ' % start
def move(self, pos, direction):
offset = self.moves[direction]
return pointwise('add', pos, offset)
def test_empty(self):
self.assertEqual(pointwise('add', [], []), [])
def test_singleton(self):
self.assertEqual(pointwise('add', [1, 1], 1), [2, 2])
def test_tuple(self):
self.assertEqual(pointwise('add', [1, 1], (2, 2)), (3, 3))
def test_add(self):
self.assertEqual(pointwise('add', [1, 1], [2, 2]), [3, 3])
def start_draw(self, pos, direction):
start = pointwise('add', pos,
pointwise('div', self.moves[direction], 2.0))
return '<path d="M %s %s ' % start
def move(self, pos, direction):
offset = self.moves[direction]
return pointwise('add', pos, offset)
def test_empty(self):
self.assertEqual(pointwise('add', [], []), [])
def test_singleton(self):
self.assertEqual(pointwise('add', [1, 1], 1), [2, 2])
def test_tuple(self):
self.assertEqual(pointwise('add', [1, 1], (2, 2)), (3, 3))
def test_add(self):
self.assertEqual(pointwise('add', [1, 1], [2, 2]), [3, 3])
