if cmd == 'M':
x = x * 1.25
y = (-y + 1440) * 1.25
else:
if not cursor: # 'm' appear as the first element of a path
x = x * 1.25
y = (-y + 1440) * 1.25
else:
x = cursor.x + x * 1.25
y = cursor.y + y * -1.25
p = Point(x, y)
if not path.start:
path.start = p
else:
sl = StraightLine.from_points(cursor, p)
path.extend(sl)
path.end = p
cursor = p
if cmd in 'Ll':
while len(nums) > 0:
x = nums.pop(0)
y = nums.pop(0)
if cmd == 'L':
x = x * 1.25
y = (-y + 1440) * 1.25
else:
x = cursor.x + x * 1.25
y = cursor.y + y * -1.25
p = Point(x, y)
sl = StraightLine.from_points(cursor, p)
path.extend(sl)
def get_paths(filename):
"""Get a colletion of Path objects from text data."""
pattern = re.compile("(?:[-,]?[0-9]+(?:\.[0-9]+)?)")
paths = []
fp = open(filename, "r")
for line in fp.readlines():
path = None
cursor = Point(0, 0) # can't initialize to None because of command "moveto"
for seg in line.split():
command = seg[0]
if command in "Zz":
path.close()
else:
"""Get and convert to actual coordinate(number) from a command
section"""
nums = pattern.findall(seg[1:])
for i in range(0, len(nums)):
nums[i] = float(nums[i].strip(",")) * 1.25 # 1.25 is just a size factor
"""Convert relative coordinate to abstract coordinate
Ignore Arc(a) for now"""
if command in "mlcsqt":
for i in range(0, len(nums)):
if i % 2 == 0:
nums[i] = nums[i] + cursor.x
else:
nums[i] = nums[i] + cursor.y
elif command == "h":
nums[0] = nums[0] + cursor.x
elif command == "v":
nums[0] = nums[0] + cursor.y
"""Decide how to proceed with current path
Ignore Quadratic Bezier and Arc for now"""
if command in "Mm":
current_seg = None
if not path:
path = Path()
p1 = Point(nums[0], nums[1])
cursor = p1
else:
previous_seg = current_seg
if command in "LlHhVv":
if command in "Ll":
p1 = Point(nums[0], nums[1])
if command in "Hh":
p1 = Point(nums[0], cursor.y)
if command in "Vv":
p1 = Point(cursor.x, nums[0])
current_seg = StraightLine.from_points(cursor, p1)
cursor = p1
elif command in "CcSs":
p1 = Point(nums[0], nums[1])
p2 = Point(nums[2], nums[3])
if command in "Cc":
p3 = Point(nums[4], nums[5])
current_seg = CubicBezier(cursor, p1, p2, p3)
cursor = p3
if command in "Ss":
if isinstance(previous_seg, CubicBezier):
mirror = Point(2 * cursor.x - previous_seg.c2.x, 2 * cursor.y - previous_seg.c2.y)
else:
mirror = cursor.clone()
current_seg = CubicBezier(cursor, mirror, p1, p2)
cursor = p2
else:
pass
path.extend(current_seg)
"""This is important, since there are empty paths (contain only a
"move" command but nothing else) in the input data"""
if len(path.segments) > 0:
paths.append(path)
fp.close()
return paths
