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from .stitch import Stitch
from .stop import process_stop
from .trim import process_trim
from .ties import add_ties
from ..svg import PIXELS_PER_MM
from ..utils.geometry import Point
from ..threads import ThreadColor
def patches_to_stitch_plan(patches, collapse_len=3.0 * PIXELS_PER_MM):
"""Convert a collection of inkstitch.element.Patch objects to a StitchPlan.
* applies instructions embedded in the Patch such as trim_after and stop_after
* adds tie-ins and tie-offs
* adds jump-stitches between patches if necessary
"""
stitch_plan = StitchPlan()
color_block = stitch_plan.new_color_block()
need_trim = False
for patch in patches:
if not patch.stitches:
continue
if not color_block.has_color():
# set the color for the first color block
color_block.color = patch.color
if color_block.color == patch.color:
if need_trim:
process_trim(color_block, patch.stitches[0])
need_trim = False
# add a jump stitch between patches if the distance is more
# than the collapse length
if color_block.last_stitch:
if (patch.stitches[0] - color_block.last_stitch).length() > collapse_len:
color_block.add_stitch(patch.stitches[0].x, patch.stitches[0].y, jump=True)
else:
# add a color change (only if we didn't just do a "STOP after")
if not color_block.last_stitch.color_change:
stitch = color_block.last_stitch.copy()
stitch.color_change = True
color_block.add_stitch(stitch)
color_block = stitch_plan.new_color_block()
color_block.color = patch.color
color_block.filter_duplicate_stitches()
color_block.add_stitches(patch.stitches, no_ties=patch.stitch_as_is)
if patch.trim_after:
# a trim needs to be followed by a jump to the next stitch, so
# we'll process it when we start the next patch
need_trim = True
if patch.stop_after:
process_stop(color_block)
add_jumps(stitch_plan)
add_ties(stitch_plan)
return stitch_plan
def add_jumps(stitch_plan):
"""Add a JUMP stitch at the start of each color block."""
for color_block in stitch_plan:
stitch = color_block.stitches[0].copy()
stitch.jump = True
color_block.stitches.insert(0, stitch)
class StitchPlan(object):
"""Holds a set of color blocks, each containing stitches."""
def __init__(self):
self.color_blocks = []
def new_color_block(self, *args, **kwargs):
color_block = ColorBlock(*args, **kwargs)
self.color_blocks.append(color_block)
return color_block
def __iter__(self):
return iter(self.color_blocks)
def __len__(self):
return len(self.color_blocks)
def __repr__(self):
return "StitchPlan(%s)" % ", ".join(repr(cb) for cb in self.color_blocks)
@property
def num_colors(self):
"""Number of unique colors in the stitch plan."""
return len({block.color for block in self})
@property
def num_stops(self):
return sum(block.num_stops for block in self)
@property
def num_trims(self):
return sum(block.num_trims for block in self)
@property
def num_stitches(self):
return sum(block.num_stitches for block in self)
@property
def bounding_box(self):
color_block_bounding_boxes = [cb.bounding_box for cb in self]
minx = min(bb[0] for bb in color_block_bounding_boxes)
miny = min(bb[1] for bb in color_block_bounding_boxes)
maxx = max(bb[2] for bb in color_block_bounding_boxes)
maxy = max(bb[3] for bb in color_block_bounding_boxes)
return minx, miny, maxx, maxy
@property
def dimensions(self):
minx, miny, maxx, maxy = self.bounding_box
return (maxx - minx, maxy - miny)
@property
def extents(self):
minx, miny, maxx, maxy = self.bounding_box
return max(-minx, maxx), max(-miny, maxy)
@property
def dimensions_mm(self):
dimensions = self.dimensions
return (dimensions[0] / PIXELS_PER_MM, dimensions[1] / PIXELS_PER_MM)
class ColorBlock(object):
"""Holds a set of stitches, all with the same thread color."""
def __init__(self, color=None, stitches=None):
self.color = color
self.stitches = stitches or []
def __iter__(self):
return iter(self.stitches)
def __repr__(self):
return "ColorBlock(%s, %s)" % (self.color, self.stitches)
def has_color(self):
return self._color is not None
@property
def color(self):
return self._color
@color.setter
def color(self, value):
if isinstance(value, ThreadColor):
self._color = value
elif value is None:
self._color = None
else:
self._color = ThreadColor(value)
@property
def last_stitch(self):
if self.stitches:
return self.stitches[-1]
else:
return None
@property
def num_stitches(self):
"""Number of stitches in this color block."""
return len(self.stitches)
@property
def num_stops(self):
"""Number of pauses in this color block."""
# Stops are encoded using two STOP stitches each. See the comment in
# stop.py for an explanation.
return sum(1 for stitch in self if stitch.stop) / 2
@property
def num_trims(self):
"""Number of trims in this color block."""
return sum(1 for stitch in self if stitch.trim)
def filter_duplicate_stitches(self):
if not self.stitches:
return
stitches = [self.stitches[0]]
for stitch in self.stitches[1:]:
if stitches[-1].jump or stitch.stop or stitch.trim:
# Don't consider jumps, stops, or trims as candidates for filtering
pass
else:
l = (stitch - stitches[-1]).length()
if l <= 0.1:
# duplicate stitch, skip this one
continue
stitches.append(stitch)
self.stitches = stitches
def add_stitch(self, *args, **kwargs):
if isinstance(args[0], Stitch):
self.stitches.append(args[0])
elif isinstance(args[0], Point):
self.stitches.append(Stitch(args[0].x, args[0].y, *args[1:], **kwargs))
else:
self.stitches.append(Stitch(*args, **kwargs))
def add_stitches(self, stitches, *args, **kwargs):
for stitch in stitches:
if isinstance(stitch, (Stitch, Point)):
self.add_stitch(stitch, *args, **kwargs)
else:
self.add_stitch(*(list(stitch) + args), **kwargs)
def replace_stitches(self, stitches):
self.stitches = stitches
@property
def bounding_box(self):
minx = min(stitch.x for stitch in self)
miny = min(stitch.y for stitch in self)
maxx = max(stitch.x for stitch in self)
maxy = max(stitch.y for stitch in self)
return minx, miny, maxx, maxy
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