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import math
from shapely import geometry as shgeo
from ..i18n import _
from ..utils import cache
from ..stitches import auto_fill
from .element import param, Patch
from .fill import Fill
class AutoFill(Fill):
element_name = _("Auto-Fill")
@property
@param('auto_fill', _('Automatically routed fill stitching'), type='toggle', default=True)
def auto_fill(self):
return self.get_boolean_param('auto_fill', True)
@property
@cache
def outline(self):
return self.shape.boundary[0]
@property
@cache
def outline_length(self):
return self.outline.length
@property
def flip(self):
return False
@property
@param('running_stitch_length_mm',
_('Running stitch length (traversal between sections)'),
tooltip=_('Length of stitches around the outline of the fill region used when moving from section to section.'),
unit='mm',
type='float',
default=1.5)
def running_stitch_length(self):
return max(self.get_float_param("running_stitch_length_mm", 1.5), 0.01)
@property
@param('fill_underlay', _('Underlay'), type='toggle', group=_('AutoFill Underlay'), default=False)
def fill_underlay(self):
return self.get_boolean_param("fill_underlay", default=False)
@property
@param('fill_underlay_angle',
_('Fill angle'),
tooltip=_('default: fill angle + 90 deg'),
unit='deg',
group=_('AutoFill Underlay'),
type='float')
@cache
def fill_underlay_angle(self):
underlay_angle = self.get_float_param("fill_underlay_angle")
if underlay_angle:
return math.radians(underlay_angle)
else:
return self.angle + math.pi / 2.0
@property
@param('fill_underlay_row_spacing_mm',
_('Row spacing'),
tooltip=_('default: 3x fill row spacing'),
unit='mm',
group=_('AutoFill Underlay'),
type='float')
@cache
def fill_underlay_row_spacing(self):
return self.get_float_param("fill_underlay_row_spacing_mm") or self.row_spacing * 3
@property
@param('fill_underlay_max_stitch_length_mm',
_('Max stitch length'),
tooltip=_('default: equal to fill max stitch length'),
unit='mm',
group=_('AutoFill Underlay'), type='float')
@cache
def fill_underlay_max_stitch_length(self):
return self.get_float_param("fill_underlay_max_stitch_length_mm") or self.max_stitch_length
@property
@param('fill_underlay_inset_mm',
_('Inset'),
tooltip=_('Shrink the shape before doing underlay, to prevent underlay from showing around the outside of the fill.'),
unit='mm',
group=_('AutoFill Underlay'),
type='float',
default=0)
def fill_underlay_inset(self):
return self.get_float_param('fill_underlay_inset_mm', 0)
@property
@param('expand_mm',
_('Expand'),
tooltip=_('Expand the shape before fill stitching, to compensate for gaps between shapes.'),
unit='mm',
type='float',
default=0)
def expand(self):
return self.get_float_param('expand_mm', 0)
def shrink_or_grow_shape(self, amount):
if amount:
shape = self.shape.buffer(amount)
if not isinstance(shape, shgeo.MultiPolygon):
shape = shgeo.MultiPolygon([shape])
return shape
else:
return self.shape
@property
def underlay_shape(self):
return self.shrink_or_grow_shape(-self.fill_underlay_inset)
@property
def fill_shape(self):
return self.shrink_or_grow_shape(self.expand)
def get_starting_point(self, last_patch):
# If there is a "fill_start" Command, then use that; otherwise pick
# the point closest to the end of the last patch.
if self.get_command('fill_start'):
return self.get_command('fill_start').target_point
elif last_patch:
return last_patch.stitches[-1]
else:
return None
def get_ending_point(self):
if self.get_command('fill_end'):
return self.get_command('fill_end').target_point
else:
return None
def to_patches(self, last_patch):
stitches = []
starting_point = self.get_starting_point(last_patch)
ending_point = self.get_ending_point()
if self.fill_underlay:
stitches.extend(auto_fill(self.underlay_shape,
self.fill_underlay_angle,
self.fill_underlay_row_spacing,
self.fill_underlay_row_spacing,
self.fill_underlay_max_stitch_length,
self.running_stitch_length,
self.staggers,
starting_point))
starting_point = stitches[-1]
stitches.extend(auto_fill(self.fill_shape,
self.angle,
self.row_spacing,
self.end_row_spacing,
self.max_stitch_length,
self.running_stitch_length,
self.staggers,
starting_point,
ending_point))
return [Patch(stitches=stitches, color=self.color)]
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