def test_translate():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(3)
p.arc_left(90, 3)
p.turn_left(90)
p.move_forward(3)
p.fill_mode()
p.circle(0.5)
p.move_forward(3)
p.square(1)
p.paper.translate((1, 1))
assert_equal(p.paper.svg_elements(1), [
('<path d="M1.0,-1.5 L1.0,-0.5 L4.0,-0.5 A 3.5,3.5 0 0 0 '
'7.5,-4.0 L6.5,-4.0 A 2.5,2.5 0 0 1 4.0,-1.5 L1.0,-1.5 z" '
'fill="#000000" />'),
('<path d="M4.5,-4.0 A 0.5,0.5 0 0 0 3.5,-4.0 '
'A 0.5,0.5 0 0 0 4.5,-4.0 z" fill="#000000" />'),
('<path d="M0.5,-3.5 L1.5,-3.5 L1.5,-4.5 L0.5,-4.5 L0.5,-3.5 z" '
'fill="#000000" />'),
])
def test_translate():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(3)
p.arc_left(90, 3)
p.turn_left(90)
p.move_forward(3)
p.fill_mode()
p.circle(0.5)
p.move_forward(3)
p.square(1)
p.paper.translate((1, 1))
assert_equal(
p.paper.svg_elements(1),
[
(
'<path d="M1.0,-1.5 L1.0,-0.5 L4.0,-0.5 A 3.5,3.5 0 0 0 '
'7.5,-4.0 L6.5,-4.0 A 2.5,2.5 0 0 1 4.0,-1.5 L1.0,-1.5 z" '
'fill="#000000" />'
),
(
'<path d="M4.5,-4.0 A 0.5,0.5 0 0 0 3.5,-4.0 '
'A 0.5,0.5 0 0 0 4.5,-4.0 z" fill="#000000" />'
),
(
'<path d="M0.5,-3.5 L1.5,-3.5 L1.5,-4.5 L0.5,-4.5 L0.5,-3.5 z" '
'fill="#000000" />'
),
]
)
def test_paper_merge():
# Merge two drawings together.
paper = Paper()
p = Pen()
p.fill_mode()
p.turn_to(0)
p.arc_left(180, 5)
p.paper.center_on_x(0)
paper.merge(p.paper)
p = Pen()
p.fill_mode()
p.turn_to(180)
p.arc_left(180, 5)
p.paper.center_on_x(0)
paper.merge(p.paper)
assert_path_data(
paper, 1,
[
'M-2.5,0.0 A 5.0,5.0 0 0 0 -2.5,-10.0',
'M2.5,0.0 A 5.0,5.0 0 0 0 2.5,10.0',
]
)
def test_copy_arc():
p1 = Pen()
p1.fill_mode()
p1.move_to((0, 0))
p1.turn_to(0)
p1.arc_left(90, radius=5)
p2 = p1.copy(paper=True)
p2.arc_left(90, radius=5)
assert_path_data(p1, 0, 'M0,0 A 5,5 0 0 0 5,-5')
assert_path_data(p2, 0, 'M0,0 A 5,5 0 0 0 5,-5 A 5,5 0 0 0 0,-10')
def test_copy_arc():
p1 = Pen()
p1.fill_mode()
p1.move_to((0, 0))
p1.turn_to(0)
p1.arc_left(90, radius=5)
p2 = p1.copy(paper=True)
p2.arc_left(90, radius=5)
assert_path_data(
p1, 0,
'M0,0 A 5,5 0 0 0 5,-5'
)
assert_path_data(
p2, 0,
'M0,0 A 5,5 0 0 0 5,-5 A 5,5 0 0 0 0,-10'
)
def test_paper_merge():
# Merge two drawings together.
paper = Paper()
p = Pen()
p.fill_mode()
p.turn_to(0)
p.arc_left(180, 5)
p.paper.center_on_x(0)
paper.merge(p.paper)
p = Pen()
p.fill_mode()
p.turn_to(180)
p.arc_left(180, 5)
p.paper.center_on_x(0)
paper.merge(p.paper)
assert_path_data(paper, 1, [
'M-2.5,0.0 A 5.0,5.0 0 0 0 -2.5,-10.0',
'M2.5,0.0 A 5.0,5.0 0 0 0 2.5,10.0',
])
def test_arc_segment_bounds():
# Arc which occupies its entire circle.
p = Pen()
p.fill_mode()
p.move_to((1, 0))
p.turn_to(90)
p.arc_left(359, 1)
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(-1, -1, 1, 1)
)
# Arc which pushes the boundary only with the endpoints.
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(30)
p.move_forward(1)
p.turn_left(90)
p.arc_left(30, center=(0, 0))
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(0.5, 0.5, sqrt3 / 2, sqrt3 / 2)
)
# Arc which pushes the boundary with the middle in one spot.
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(-45)
p.move_forward(1)
p.turn_left(90)
p.arc_left(90, center=(0, 0))
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(sqrt2 / 2, -sqrt2 / 2, 1, sqrt2 / 2)
)
# Arc which goes right.
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(45)
p.arc_right(90, 3)
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(0, 0, 3 * sqrt2, 3 - 1.5 * sqrt2)
)
# Arc which pushes the boundary with the middle in two spots.
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(-45)
p.move_forward(1)
p.turn_left(90)
p.arc_left(180, center=(0, 0))
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(-sqrt2 / 2, -sqrt2 / 2, 1, 1)
)
# Half circle, right side
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(0)
p.arc_right(180, 5)
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(0, -10, 5, 0)
)
# Thick circle,
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.move_forward(5)
p.turn_left(90)
p.arc_left(180, 5, start_slant=45)
arc = p.last_segment()
assert_equal(
arc.bounds(),
Bounds(-5.5, -0.5314980314970469, 5.5, 5.5)
)
b = 0.03
c = 0.2
d = 1.5
e = 0.5
wobble = a * math.exp(-b * n) * math.sin(c * n + d * n**e)
return (
Angle(-24 + wobble),
Angle(24 + wobble),
)
center_heading = Heading(90)
center = p.position
p.turn_to(center_heading)
num_layers = 26
for layer in range(num_layers):
lo, hi = f(layer)
lo = center_heading + lo
hi = center_heading + hi
p.arc_right((p.heading - lo) + 90, center=center)
p.arc_left(180, 1)
p.arc_left((hi - p.heading) + 90, center=center)
if layer < (num_layers - 1):
p.arc_right(180, 1)
print(p.paper.format_svg(resolution=720 / p.paper.bounds().width))
a = 12
b = 0.03
c = 0.2
d = 1.5
e = 0.5
wobble = a * math.exp(-b * n) * math.sin(c * n + d * n**e)
return (
Angle(-24 + wobble),
Angle(24 + wobble),
)
center_heading = Heading(90)
center = p.position
p.turn_to(center_heading)
num_layers = 26
for layer in range(num_layers):
lo, hi = f(layer)
lo = center_heading + lo
hi = center_heading + hi
p.arc_right((p.heading - lo) + 90, center=center)
p.arc_left(180, 1)
p.arc_left((hi - p.heading) + 90, center=center)
if layer < (num_layers - 1):
p.arc_right(180, 1)
print(p.paper.format_svg(resolution=720 / p.paper.bounds().width))