def save(cls, image, filename, mosaic=False):
# Use debug=False everywhere to turn off SVG validation,
# which turns out to be obscenely expensive in this
# library.
DEBUG = False
svg = svgwrite.Drawing(filename=filename,
style='background-color: black;',
size=(("%dpx" % (2 * image.r_outer),
"%dpx" % (2 * image.r_outer))),
debug=DEBUG)
group = Group(debug=DEBUG)
group.translate(image.r_outer, image.r_outer)
for y, row in enumerate(image.pixels):
ring = image.rings[y]
theta = 2 * math.pi / len(row)
r1 = ring.center + image.r_ring / 2
r2 = ring.center - image.r_ring / 2
for x, c in enumerate(row):
if mosaic:
path = Path(stroke='black',
stroke_width=1,
fill=cls.color_hex(c),
debug=DEBUG)
path.push((('M', 0, r2),
('L', 0, r1),
('A', r1, r1, 0, '0,0',
(r1 * sin(theta),
r1 * cos(theta))),
('L', r2 * sin(theta),
r2 * cos(theta)),
('A', r2, r2, 0, '0,1',
(0, r2))))
else:
path = Path(stroke=cls.color_hex(c),
stroke_width=image.r_pixel,
fill='none',
debug=DEBUG)
path.push((('M', 0, ring.center),
('A', ring.center, ring.center, 0, '0,0',
(ring.center * sin(theta),
ring.center * cos(theta)))))
path.rotate(180 - degrees(theta * (x + 1)),
center=(0, 0))
group.add(path)
svg.add(group)
svg.save()
def save(cls, image, filename, mosaic=False):
# Use debug=False everywhere to turn off SVG validation,
# which turns out to be obscenely expensive in this
# library.
DEBUG = False
svg = svgwrite.Drawing(filename=filename,
style='background-color: black;',
size=(("%dpx" % (2 * image.r_outer),
"%dpx" % (2 * image.r_outer))),
debug=DEBUG)
group = Group(debug=DEBUG)
group.translate(image.r_outer, image.r_outer)
for y, row in enumerate(image.pixels):
ring = image.rings[y]
theta = 2 * math.pi / len(row)
r1 = ring.center + image.r_ring / 2
r2 = ring.center - image.r_ring / 2
for x, c in enumerate(row):
if mosaic:
path = Path(stroke='black',
stroke_width=1,
fill=cls.color_hex(c),
debug=DEBUG)
path.push(
(('M', 0, r2), ('L', 0, r1), ('A', r1, r1, 0, '0,0',
(r1 * sin(theta),
r1 * cos(theta))),
('L', r2 * sin(theta),
r2 * cos(theta)), ('A', r2, r2, 0, '0,1', (0, r2))))
else:
path = Path(stroke=cls.color_hex(c),
stroke_width=image.r_pixel,
fill='none',
debug=DEBUG)
path.push((('M', 0, ring.center),
('A', ring.center, ring.center, 0, '0,0',
(ring.center * sin(theta),
ring.center * cos(theta)))))
path.rotate(180 - degrees(theta * (x + 1)), center=(0, 0))
group.add(path)
svg.add(group)
svg.save()
def draw_slice(center, radius, start_angle, stop_angle, **kwargs):
p_a = Path(**kwargs)
angle = math.radians(stop_angle - start_angle) / 2.0
p_a.push(f"""M {center[0]} {center[1]}
l {cos(-1*angle)*radius} {sin(-1*angle)*radius}""")
p_a.push_arc(
target=(cos(angle) * radius + center[0],
sin(angle) * radius + center[1]),
rotation=0,
r=radius,
large_arc=True if stop_angle - start_angle > 180 else False,
angle_dir="+",
absolute=True,
)
p_a.push("Z")
p_a.rotate(
angle=(min([start_angle, stop_angle]) +
(stop_angle - start_angle) / 2.0),
center=center,
)
return p_a
