def test_arc_line_half_illegal_joint():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.line_to((1, 0))
p.turn_to(180 - 15)
p.arc_to((-1, 0))
line, arc = p.last_path().segments
assert line.end_joint_illegal
assert arc.start_joint_illegal
assert_path_data(p, 2,
('M0.00,-0.50 L0.00,0.50 L2.93,0.50 '
'A 4.36,4.36 0 0 0 -1.13,-0.48 L-0.87,0.48 '
'A 3.36,3.36 0 0 1 0.87,0.48 L1.00,-0.50 L0.00,-0.50 z'))
p = Pen()
p.stroke_mode(1.0)
p.move_to((-1, 0))
p.turn_to(15)
p.arc_to((1, 0))
p.line_to((0, 0))
arc, line = p.paper.paths[0].segments
assert arc.end_joint_illegal
assert line.start_joint_illegal
assert_path_data(p, 2,
('M-1.13,-0.48 L-0.87,0.48 A 3.36,3.36 0 0 1 0.87,0.48 '
'L1.00,-0.50 L0.00,-0.50 L0.00,0.50 L2.93,0.50 '
'A 4.36,4.36 0 0 0 -1.13,-0.48 z'))
def test_arc_angle_error():
# Endpoints with certain angles do not go all the way across the
# stroke, and are disallowed.
p = Pen()
p.stroke_mode(1.0)
p.arc_left(90, 10, start_slant=0)
seg = p.last_segment()
assert seg.start_joint_illegal
assert not seg.end_joint_illegal
p = Pen()
p.stroke_mode(1.0)
p.arc_left(90, 10, end_slant=90)
seg = p.last_segment()
assert not seg.start_joint_illegal
assert seg.end_joint_illegal
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(90, radius=5, start_slant=25)
seg = p.last_segment()
assert seg.start_joint_illegal
assert not seg.end_joint_illegal
# A combination of angles can also create a degenerate arc.
p = Pen()
p.stroke_mode(1.0)
p.turn_toward((1, 0))
p.turn_left(1)
p.arc_to((1, 0), start_slant=40, end_slant=-40)
seg = p.last_segment()
assert seg.start_joint_illegal
assert seg.end_joint_illegal
def test_offwidth_arc_joins():
# Join arcs and lines of different widths.
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
p.stroke_mode(0.8)
p.line_forward(5)
p.turn_left(45)
p.stroke_mode(3.0)
p.arc_left(90, 5)
p.turn_to(-180)
p.line_forward(5)
p.turn_left(45)
p.stroke_mode(0.8)
p.arc_left(45, 5)
p.turn_right(90)
p.stroke_mode(3.0)
p.arc_right(90, 4)
assert_svg_file(
p, 3,
'test_offwidth_arc_joins.svg'
)
def test_line_line_half_illegal_joint():
# The outside edge meets, but the inside is too short to meet.
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(2)
p.turn_left(165)
p.line_forward(2)
assert_path_data(p, 2,
('M0.00,-0.50 L0.00,0.50 L5.80,0.50 L0.20,-1.00 '
'L-0.06,-0.03 L1.87,0.48 L2.00,-0.50 L0.00,-0.50 z'))
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(2)
p.turn_right(165)
p.line_forward(2)
assert_path_data(p, 2,
('M0.00,-0.50 L0.00,0.50 L2.00,0.50 L1.87,-0.48 '
'L-0.06,0.03 L0.20,1.00 L5.80,-0.50 L0.00,-0.50 z'))
def test_color_path():
# Changing colors starts a new path.
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
p.stroke_mode(1.0, (1.0, 0.0, 0.0))
p.line_forward(1)
p.stroke_mode(1.0, (0.0, 1.0, 0.0))
p.line_forward(1)
p.stroke_mode(1.0, (0.0, 0.0, 1.0))
p.line_forward(1)
assert_equal(
p.paper.svg_elements(1),
[
(
'<path d="M0.0,-0.5 L0.0,0.5 L1.0,0.5 L1.0,-0.5 L0.0,-0.5 z" '
'fill="#ff0000" />'
'<path d="M1.0,-0.5 L1.0,0.5 L2.0,0.5 L2.0,-0.5 L1.0,-0.5 z" '
'fill="#00ff00" />'
'<path d="M2.0,-0.5 L2.0,0.5 L3.0,0.5 L3.0,-0.5 L2.0,-0.5 z" '
'fill="#0000ff" />'
),
]
)
def test_custom_cap():
def circle_cap(pen, end):
pen.arc_to(end)
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5)
p.last_segment().end_cap = circle_cap
assert_path_data(
p, 0,
'M0,-1 L0,1 L5,1 A 1,1 0 0 0 5,-1 L0,-1 z'
)
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5)
p.last_segment().start_cap = circle_cap
assert_path_data(
p, 0,
'M0,-1 A 1,1 0 1 0 0,1 L5,1 L5,-1 L0,-1 z'
)
def test_color_formats():
for color, output in [
(
(1.0, 0.0, 0.0),
'#ff0000',
),
(
Color.NewFromHtml('red'),
'#ff0000',
),
(
'green',
'#008000',
),
(
'#123456',
'#123456',
),
]:
p = Pen()
p.stroke_mode(2.0, color)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5)
assert_equal(
p.paper.svg_elements(0)[0],
'<path d="M0,-1 L0,1 L5,1 L5,-1 L0,-1 z" fill="{}" />'.format(output)
)
def test_arc_angle_error():
# Endpoints with certain angles do not go all the way across the
# stroke, and are disallowed.
p = Pen()
p.stroke_mode(1.0)
p.arc_left(90, 10, start_slant=0)
seg = p.last_segment()
assert seg.start_joint_illegal
assert not seg.end_joint_illegal
p = Pen()
p.stroke_mode(1.0)
p.arc_left(90, 10, end_slant=90)
seg = p.last_segment()
assert not seg.start_joint_illegal
assert seg.end_joint_illegal
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(90, radius=5, start_slant=25)
seg = p.last_segment()
assert seg.start_joint_illegal
assert not seg.end_joint_illegal
# A combination of angles can also create a degenerate arc.
p = Pen()
p.stroke_mode(1.0)
p.turn_toward((1, 0))
p.turn_left(1)
p.arc_to((1, 0), start_slant=40, end_slant=-40)
seg = p.last_segment()
assert seg.start_joint_illegal
assert seg.end_joint_illegal
def draw(offset):
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(0.5 + offset, end_slant=45)
return p
def draw(offset):
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(0.5 + offset, end_slant=45)
return p
def test_outliner_mode():
# We can set up a pattern in one mode,
p = Pen()
p.set_mode(StrokeOutlineMode(sqrt3, 0.2 * sqrt3, 'blue', 'black'))
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5, end_slant=60)
# Then continue it in another mode without caring what the first mode was.
old_mode = p.mode
p.set_mode(p.mode.outliner_mode())
p.turn_to(60)
p.move_forward(1.0)
p.turn_left(60)
p.line_forward(2.0)
p.turn_right(120)
p.line_forward(2.0)
p.turn_right(120)
p.line_forward(2.0)
p.turn_to(60)
p.move_forward(3.0)
p.turn_to(120)
p.set_mode(old_mode)
p.line_forward(5, start_slant=60)
assert_svg_file(
p, 3,
'test_outliner_mode.svg'
)
def test_arc_joint_continue():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(90, 5)
p.arc_left(90, 5)
p.move_to((0, 0))
p.turn_to(0)
p.arc_right(90, 5)
p.arc_right(90, 5)
assert_path_data(
p, 0,
(
'M0,-1 L0,1 A 6,6 0 0 0 6,-5 A 6,6 0 0 0 0,-11 '
'L0,-9 A 4,4 0 0 1 4,-5 A 4,4 0 0 1 0,-1 z '
'M0,-1 L0,1 A 4,4 0 0 1 4,5 A 4,4 0 0 1 0,9 '
'L0,11 A 6,6 0 0 0 6,5 A 6,6 0 0 0 0,-1 z'
),
)
def test_joint_loop_multiple():
p = Pen()
p.stroke_mode(0.2)
def square():
p.turn_to(180)
p.line_forward(1)
p.turn_left(90)
p.line_forward(1)
p.turn_left(90)
p.line_forward(1)
p.turn_left(90)
p.line_forward(1)
p.move_to((0, 0))
square()
p.move_to((2, 0))
square()
assert_path_data(
p, 1,
(
'M0.1,-0.1 L-1.1,-0.1 L-1.1,1.1 L0.1,1.1 L0.1,-0.1 z '
'M-0.1,0.1 L-0.1,0.9 L-0.9,0.9 L-0.9,0.1 L-0.1,0.1 z '
'M2.1,-0.1 L0.9,-0.1 L0.9,1.1 L2.1,1.1 L2.1,-0.1 z '
'M1.9,0.1 L1.9,0.9 L1.1,0.9 L1.1,0.1 L1.9,0.1 z'
)
)
def test_straight_joint_headings():
# The math in calculating joint geometry can get numerically unstable
# very close to straight joints at various headings.
for heading_angle in range(0, 45):
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(heading_angle)
p.line_forward(10)
p.line_forward(10)
path = p.paper.paths[0]
path.render_path(2) # Doesn't crash.
# Check that the joint angle is 90 degrees from the heading.
assert_equal(len(p.paper.paths), 1)
segments = p.paper.paths[0].segments
assert_equal(len(segments), 2)
s0, s1 = segments
target_angle = (heading_angle + 90) % 180
joint_angle = math.degrees(vec.heading(vec.vfrom(s0.b_right, s0.b_left)))
assert_almost_equal(joint_angle % 180, target_angle)
joint_angle = math.degrees(vec.heading(vec.vfrom(s1.a_right, s1.a_left)))
assert_almost_equal(joint_angle % 180, target_angle)
def test_outliner_mode():
# We can set up a pattern in one mode,
p = Pen()
p.set_mode(StrokeOutlineMode(sqrt3, 0.2 * sqrt3, 'blue', 'black'))
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5, end_slant=60)
# Then continue it in another mode without caring what the first mode was.
old_mode = p.mode
p.set_mode(p.mode.outliner_mode())
p.turn_to(60)
p.move_forward(1.0)
p.turn_left(60)
p.line_forward(2.0)
p.turn_right(120)
p.line_forward(2.0)
p.turn_right(120)
p.line_forward(2.0)
p.turn_to(60)
p.move_forward(3.0)
p.turn_to(120)
p.set_mode(old_mode)
p.line_forward(5, start_slant=60)
assert_svg_file(
p, 3,
'test_outliner_mode.svg'
)
def test_joint_loop_color():
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
# Draw a square with one side a different color. It joins to the
# beginning correctly.
p.stroke_mode(2.0, color='black')
p.line_forward(5)
p.turn_left(90)
p.line_forward(5)
p.turn_left(90)
p.line_forward(5)
p.turn_left(90)
p.stroke_mode(2.0, color='red')
p.line_forward(5)
assert_equal(len(p.paper.paths), 1)
assert_path_data(
p, 0,
[
'M1,-1 L-1,1 L6,1 L6,-6 L-1,-6 L1,-4 L4,-4 L4,-1 L1,-1 z',
'M1,-4 L-1,-6 L-1,1 L1,-1 L1,-4 z',
]
)
def test_color_path():
# Changing colors starts a new path.
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
p.stroke_mode(1.0, (1.0, 0.0, 0.0))
p.line_forward(1)
p.stroke_mode(1.0, (0.0, 1.0, 0.0))
p.line_forward(1)
p.stroke_mode(1.0, (0.0, 0.0, 1.0))
p.line_forward(1)
assert_equal(
p.paper.svg_elements(1),
[
(
'<path d="M0.0,-0.5 L0.0,0.5 L1.0,0.5 L1.0,-0.5 L0.0,-0.5 z" '
'fill="#ff0000" />'
'<path d="M1.0,-0.5 L1.0,0.5 L2.0,0.5 L2.0,-0.5 L1.0,-0.5 z" '
'fill="#00ff00" />'
'<path d="M2.0,-0.5 L2.0,0.5 L3.0,0.5 L3.0,-0.5 L2.0,-0.5 z" '
'fill="#0000ff" />'
),
]
)
def test_color_formats():
for color, output in [
(
(1.0, 0.0, 0.0),
'#ff0000',
),
(
Color.from_html('red'),
'#ff0000',
),
(
'green',
'#008000',
),
(
'#123456',
'#123456',
),
]:
p = Pen()
p.stroke_mode(2.0, color)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5)
assert_equal(
p.paper.svg_elements(0)[0],
'<path d="M0,-1 L0,1 L5,1 L5,-1 L0,-1 z" fill="{}" />'.format(output)
)
def test_joint_loop_multiple():
p = Pen()
p.stroke_mode(0.2)
def square():
p.turn_to(180)
p.line_forward(1)
p.turn_left(90)
p.line_forward(1)
p.turn_left(90)
p.line_forward(1)
p.turn_left(90)
p.line_forward(1)
p.move_to((0, 0))
square()
p.move_to((2, 0))
square()
assert_path_data(
p, 1,
(
'M0.1,-0.1 L-1.1,-0.1 L-1.1,1.1 L0.1,1.1 L0.1,-0.1 z '
'M-0.1,0.1 L-0.1,0.9 L-0.9,0.9 L-0.9,0.1 L-0.1,0.1 z '
'M2.1,-0.1 L0.9,-0.1 L0.9,1.1 L2.1,1.1 L2.1,-0.1 z '
'M1.9,0.1 L1.9,0.9 L1.1,0.9 L1.1,0.1 L1.9,0.1 z'
)
)
def test_joint_loop_color():
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
# Draw a square with one side a different color. It joins to the
# beginning correctly.
p.stroke_mode(2.0, color='black')
p.line_forward(5)
p.turn_left(90)
p.line_forward(5)
p.turn_left(90)
p.line_forward(5)
p.turn_left(90)
p.stroke_mode(2.0, color='red')
p.line_forward(5)
assert_equal(len(p.paper.paths), 1)
assert_path_data(
p, 0,
[
'M1,-1 L-1,1 L6,1 L6,-6 L-1,-6 L1,-4 L4,-4 L4,-1 L1,-1 z',
'M1,-4 L-1,-6 L-1,1 L1,-1 L1,-4 z',
]
)
def test_line_line_half_illegal_joint():
# The outside edge meets, but the inside is too short to meet.
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(2)
p.turn_left(165)
p.line_forward(2)
assert_path_data(
p, 2,
(
'M0.00,-0.50 L0.00,0.50 L5.80,0.50 L0.20,-1.00 '
'L-0.06,-0.03 L1.87,0.48 L2.00,-0.50 L0.00,-0.50 z'
)
)
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(2)
p.turn_right(165)
p.line_forward(2)
assert_path_data(
p, 2,
(
'M0.00,-0.50 L0.00,0.50 L2.00,0.50 L1.87,-0.48 '
'L-0.06,0.03 L0.20,1.00 L5.80,-0.50 L0.00,-0.50 z'
)
)
def test_arc_joint_continue():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(90, 5)
p.arc_left(90, 5)
p.move_to((0, 0))
p.turn_to(0)
p.arc_right(90, 5)
p.arc_right(90, 5)
assert_path_data(
p, 0,
(
'M0,-1 L0,1 A 6,6 0 0 0 6,-5 A 6,6 0 0 0 0,-11 '
'L0,-9 A 4,4 0 0 1 4,-5 A 4,4 0 0 1 0,-1 z '
'M0,-1 L0,1 A 4,4 0 0 1 4,5 A 4,4 0 0 1 0,9 '
'L0,11 A 6,6 0 0 0 6,5 A 6,6 0 0 0 0,-1 z'
),
)
def test_offwidth_arc_joins():
# Join arcs and lines of different widths.
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
p.stroke_mode(0.8)
p.line_forward(5)
p.turn_left(45)
p.stroke_mode(3.0)
p.arc_left(90, 5)
p.turn_to(-180)
p.line_forward(5)
p.turn_left(45)
p.stroke_mode(0.8)
p.arc_left(45, 5)
p.turn_right(90)
p.stroke_mode(3.0)
p.arc_right(90, 4)
assert_svg_file(
p, 3,
'test_offwidth_arc_joins.svg'
)
def test_straight_joint_headings():
# The math in calculating joint geometry can get numerically unstable
# very close to straight joints at various headings.
for heading_angle in range(0, 45):
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(heading_angle)
p.line_forward(10)
p.line_forward(10)
path = p.paper.paths[0]
path.render_path(2) # Doesn't crash.
# Check that the joint angle is 90 degrees from the heading.
assert_equal(len(p.paper.paths), 1)
segments = p.paper.paths[0].segments
assert_equal(len(segments), 2)
s0, s1 = segments
target_angle = (heading_angle + 90) % 180
joint_angle = math.degrees(vec.heading(vec.vfrom(s0.b_right, s0.b_left)))
assert_almost_equal(joint_angle % 180, target_angle)
joint_angle = math.degrees(vec.heading(vec.vfrom(s1.a_right, s1.a_left)))
assert_almost_equal(joint_angle % 180, target_angle)
def test_arc_joint_numerical():
# Sometimes arc joints can miss the mark if they have odd float numbers.
p = Pen()
p.stroke_mode(0.5)
p.move_to((-26.685559703113075, 65.00539003547281))
p.turn_to(202.85281173472714)
p.arc_right(180, 1)
# This shouldn't error:
p.arc_right(50.443252846269075, center=(0.5, 0.5))
def test_arc_joint_numerical():
# Sometimes arc joints can miss the mark if they have odd float numbers.
p = Pen()
p.stroke_mode(0.5)
p.move_to((-26.685559703113075, 65.00539003547281))
p.turn_to(202.85281173472714)
p.arc_right(180, 1)
# This shouldn't error:
p.arc_right(50.443252846269075, center=(0.5, 0.5))
def test_start_slant_legal_joint():
# Create a joint that is only legal because of the start slant.
p = Pen()
p.outline_mode(1.0, 0.1)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(0.8, start_slant=-45)
p.turn_left(90)
p.outline_mode(2.0, 0.1)
p.line_forward(5)
def test_start_slant_legal_joint():
# Create a joint that is only legal because of the start slant.
p = Pen()
p.outline_mode(1.0, 0.1)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(0.8, start_slant=-45)
p.turn_left(90)
p.outline_mode(2.0, 0.1)
p.line_forward(5)
def test_line():
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5)
assert_path_data(
p, 0,
'M0,0 L5,0'
)
def test_line():
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(5)
assert_path_data(
p, 0,
'M0,0 L5,0'
)
def test_arc_normalize():
# Arc angles larger than 360 behave correctly.
p = Pen()
p.fill_mode()
p.move_to((-5, 0))
p.turn_to(0)
p.arc_left(360 + 90, radius=5)
assert_path_data(
p, 0,
'M-5,0 A 5,5 0 0 0 0,-5'
)
def test_move_to_xy():
p = Pen()
p.move_to((0, 0))
p.turn_to(-45)
p.move_to_x(1)
assert_points_equal(p.position, (1, -1))
p = Pen()
p.move_to((0, 0))
p.turn_toward((3, 4))
p.move_to_y(8)
assert_points_equal(p.position, (6, 8))
def test_arc_zero():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
# Zero-angle and zero-radius arcs have zero length, so they are not added.
p.arc_left(0, radius=1)
assert_equal(p.paper.paths, [])
p.arc_left(90, radius=0)
assert_equal(p.paper.paths, [])
def test_straight_joint():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(3)
p.line_forward(3)
assert_path_data(
p, 0,
'M0,-1 L0,1 L3,1 L6,1 L6,-1 L3,-1 L0,-1 z'
)
def test_move_to_xy():
p = Pen()
p.move_to((0, 0))
p.turn_to(-45)
p.move_to_x(1)
assert_points_equal(p.position, (1, -1))
p = Pen()
p.move_to((0, 0))
p.turn_toward((3, 4))
p.move_to_y(8)
assert_points_equal(p.position, (6, 8))
def test_arc_sweep_bug():
p = Pen()
p.stroke_mode(2.0)
p.move_to((3, 0))
p.turn_to(90)
p.arc_left(270, 3)
assert_path_data(
p, 0,
'M2,0 L4,0 A 4,4 0 1 0 0,4 L0,2 A 2,2 0 1 1 2,0 z'
)
def test_arc_normalize():
# Arc angles larger than 360 behave correctly.
p = Pen()
p.fill_mode()
p.move_to((-5, 0))
p.turn_to(0)
p.arc_left(360 + 90, radius=5)
assert_path_data(
p, 0,
'M-5,0 A 5,5 0 0 0 0,-5'
)
def test_arc_zero():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
# Zero-angle and zero-radius arcs have zero length, so they are not added.
p.arc_left(0, radius=1)
assert_equal(p.paper.paths, [])
p.arc_left(90, radius=0)
assert_equal(p.paper.paths, [])
def test_arc_sweep_bug():
p = Pen()
p.stroke_mode(2.0)
p.move_to((3, 0))
p.turn_to(90)
p.arc_left(270, 3)
assert_path_data(
p, 0,
'M2,0 L4,0 A 4,4 0 1 0 0,4 L0,2 A 2,2 0 1 1 2,0 z'
)
def test_straight_joint():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(3)
p.line_forward(3)
assert_path_data(
p, 0,
'M0,-1 L0,1 L3,1 L6,1 L6,-1 L3,-1 L0,-1 z'
)
def test_zero_length_side():
# It is possible and legal to create a segment that just barely goes to
# zero on one side.
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(1.0, end_slant=45)
assert_path_data(
p, 0,
'M0,-1 L0,1 L2,-1 L0,-1 z',
)
def test_zero_length_side():
# It is possible and legal to create a segment that just barely goes to
# zero on one side.
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(1.0, end_slant=45)
assert_path_data(
p, 0,
'M0,-1 L0,1 L2,-1 L0,-1 z',
)
def test_arc_pie_slice():
# Draw a "pie slice" arc that is wide enough to reach all the way to the
# arc center.
p = Pen()
p.stroke_mode(1.0)
p.move_to((0.5, 0))
p.turn_to(90)
p.arc_left(90, 0.5)
assert_path_data(
p, 0,
'M0,0 L1,0 A 1,1 0 0 0 0,-1 L0,0 z'
)
def test_arc_pie_slice():
# Draw a "pie slice" arc that is wide enough to reach all the way to the
# arc center.
p = Pen()
p.stroke_mode(1.0)
p.move_to((0.5, 0))
p.turn_to(90)
p.arc_left(90, 0.5)
assert_path_data(
p, 0,
'M0,0 L1,0 A 1,1 0 0 0 0,-1 L0,0 z'
)
def test_arc_angle():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(90, radius=5, start_slant=45, end_slant=45)
assert_path_data(
p, 2,
(
'M0.53,-0.53 L-0.48,0.48 A 5.50,5.50 0 0 0 5.48,-5.48 '
'L4.47,-4.47 A 4.50,4.50 0 0 1 0.53,-0.53 z'
),
)
def test_outline():
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
p.outline_mode(1.0, 0.2)
p.line_forward(3)
assert_path_data(
p, 1,
(
'M-0.1,-0.6 L-0.1,0.6 L3.1,0.6 L3.1,-0.6 L-0.1,-0.6 z '
'M0.1,-0.4 L2.9,-0.4 L2.9,0.4 L0.1,0.4 L0.1,-0.4 z'
)
)
def test_stroke_fill_mode():
p = Pen()
p.set_mode(StrokeFillMode(0.2, 'black', 'red'))
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(180, 5)
assert_equal(
p.paper.svg_elements(1)[0],
(
'<path d="M0.0,0.0 A 5.0,5.0 0 0 0 0.0,-10.0" fill="#ff0000" />'
'<path d="M0.0,-0.1 L0.0,0.1 A 5.1,5.1 0 0 0 0.0,-10.1 '
'L0.0,-9.9 A 4.9,4.9 0 0 1 0.0,-0.1 z" fill="#000000" />'
)
)
def test_arc_angle():
p = Pen()
p.stroke_mode(1.0)
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(90, radius=5, start_slant=45, end_slant=45)
assert_path_data(
p, 2,
(
'M0.53,-0.53 L-0.48,0.48 A 5.50,5.50 0 0 0 5.48,-5.48 '
'L4.47,-4.47 A 4.50,4.50 0 0 1 0.53,-0.53 z'
),
)
def test_outline():
p = Pen()
p.move_to((0, 0))
p.turn_to(0)
p.outline_mode(1.0, 0.2)
p.line_forward(3)
assert_path_data(
p, 1,
(
'M-0.1,-0.6 L-0.1,0.6 L3.1,0.6 L3.1,-0.6 L-0.1,-0.6 z '
'M0.1,-0.4 L2.9,-0.4 L2.9,0.4 L0.1,0.4 L0.1,-0.4 z'
)
)
def test_stroke_fill_mode():
p = Pen()
p.set_mode(StrokeFillMode(0.2, 'black', 'red'))
p.move_to((0, 0))
p.turn_to(0)
p.arc_left(180, 5)
assert_equal(
p.paper.svg_elements(1)[0],
(
'<path d="M0.0,0.0 A 5.0,5.0 0 0 0 0.0,-10.0" fill="#ff0000" />'
'<path d="M0.0,-0.1 L0.0,0.1 A 5.1,5.1 0 0 0 0.0,-10.1 '
'L0.0,-9.9 A 4.9,4.9 0 0 1 0.0,-0.1 z" fill="#000000" />'
)
)
def test_arc_no_joint():
# Try to create an impossible joint between arcs of different widths.
# It doesn't join.
p = Pen()
p.move_to((0, -5))
p.turn_to(0)
p.stroke_mode(1.0)
p.arc_to((5, 0), center=(0, 0))
p.stroke_mode(2.0)
p.arc_to((0, 5), center=(0, 0))
arc1, arc2 = p.last_path().segments
assert arc1.end_joint_illegal
assert arc2.start_joint_illegal
assert_path_data(
p, 1,
(
'M0.0,4.5 L0.0,5.5 A 5.5,5.5 0 0 0 5.5,0.0 L6.0,0.0 '
'A 6.0,6.0 0 0 0 0.0,-6.0 L0.0,-4.0 '
'A 4.0,4.0 0 0 1 4.0,0.0 L4.5,0.0 '
'A 4.5,4.5 0 0 1 0.0,4.5 z'
)
)
# Join two arcs together illegally, but don't make them concentric.
p = Pen()
p.move_to((0, -5))
p.turn_to(0)
p.stroke_mode(1.0)
p.arc_to((5, 0), center=(0, 0))
p.stroke_mode(2.0)
p.arc_to((0, 5), center=(0, 0.1))
arc1, arc2 = p.last_path().segments
assert arc1.end_joint_illegal
assert arc2.start_joint_illegal
assert_path_data(
p, 2,
(
'M0.00,4.50 L0.00,5.50 A 5.50,5.50 0 0 0 5.50,0.00 L6.00,0.02 '
'A 6.00,6.00 0 0 0 0.00,-6.10 L0.00,-4.10 '
'A 4.00,4.00 0 0 1 4.00,-0.02 L4.50,0.00 '
'A 4.50,4.50 0 0 1 0.00,4.50 z'
)
)
def test_line_segments():
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(45)
p.line_forward(2.0)
assert_points_equal(p.position, (sqrt2, sqrt2))
assert_equal(len(p.paper.paths), 1)
segments = p.last_path().segments
for actual, target in zip(segments, [
((0, 0), (sqrt2, sqrt2)),
]):
assert_segments_equal(actual, target)
def test_degenerate_arc():
p = Pen()
p.stroke_mode(2.0)
p.move_to((-5, 0))
p.turn_to(0)
p.arc_to(
(5, 0),
center=(0, -200),
start_slant=-5,
end_slant=5,
)
seg = p.last_segment()
assert seg.start_joint_illegal
assert seg.end_joint_illegal
def test_long_line_thick():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
for _ in range(2):
p.line_forward(5)
p.turn_right(90)
p.line_forward(5)
p.turn_left(90)
assert_path_data(
p, 0,
'M0,-1 L0,1 L4,1 L4,6 L9,6 L9,10 L11,10 L11,4 L6,4 L6,-1 L0,-1 z'
)
def test_line_segments():
p = Pen()
p.fill_mode()
p.move_to((0, 0))
p.turn_to(45)
p.line_forward(2.0)
assert_points_equal(p.position, (sqrt2, sqrt2))
assert_equal(len(p.paper.paths), 1)
segments = p.last_path().segments
for actual, target in zip(segments, [
((0, 0), (sqrt2, sqrt2)),
]):
assert_segments_equal(actual, target)
def test_degenerate_arc():
p = Pen()
p.stroke_mode(2.0)
p.move_to((-5, 0))
p.turn_to(0)
p.arc_to(
(5, 0),
center=(0, -200),
start_slant=-5,
end_slant=5,
)
seg = p.last_segment()
assert seg.start_joint_illegal
assert seg.end_joint_illegal
def test_long_line_thick():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
for _ in range(2):
p.line_forward(5)
p.turn_right(90)
p.line_forward(5)
p.turn_left(90)
assert_path_data(
p, 0,
'M0,-1 L0,1 L4,1 L4,6 L9,6 L9,10 L11,10 L11,4 L6,4 L6,-1 L0,-1 z'
)
def test_break_stroke():
p = Pen()
p.stroke_mode(2.0)
p.move_to((0, 0))
p.turn_to(0)
p.line_forward(3)
p.break_stroke()
p.line_forward(3)
assert_path_data(
p, 0,
[
'M0,-1 L0,1 L3,1 L3,-1 L0,-1 z',
'M3,-1 L3,1 L6,1 L6,-1 L3,-1 z',
]
)
def test_multiple_strokes():
p = Pen()
p.stroke_mode(1.0)
p.turn_to(0)
p.move_to((0, 0))
p.line_forward(3)
p.move_to((0, 3))
p.line_forward(3)
assert_path_data(
p, 1,
(
'M0.0,-0.5 L0.0,0.5 L3.0,0.5 L3.0,-0.5 L0.0,-0.5 z '
'M0.0,-3.5 L0.0,-2.5 L3.0,-2.5 L3.0,-3.5 L0.0,-3.5 z'
)
)
def test_multiple_strokes():
p = Pen()
p.stroke_mode(1.0)
p.turn_to(0)
p.move_to((0, 0))
p.line_forward(3)
p.move_to((0, 3))
p.line_forward(3)
assert_path_data(
p, 1,
(
'M0.0,-0.5 L0.0,0.5 L3.0,0.5 L3.0,-0.5 L0.0,-0.5 z '
'M0.0,-3.5 L0.0,-2.5 L3.0,-2.5 L3.0,-3.5 L0.0,-3.5 z'
)
)