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from shapely import geometry as shgeo
import math
from .element import param, EmbroideryElement, Patch
from ..i18n import _
from ..svg import PIXELS_PER_MM
from ..utils import cache
from ..stitches import legacy_fill
class Fill(EmbroideryElement):
element_name = _("Fill")
def __init__(self, *args, **kwargs):
super(Fill, self).__init__(*args, **kwargs)
@property
@param('auto_fill',
_('Manually routed fill stitching'),
tooltip=_('AutoFill is the default method for generating fill stitching.'),
type='toggle',
inverse=True,
default=True)
def auto_fill(self):
return self.get_boolean_param('auto_fill', True)
@property
@param('angle',
_('Angle of lines of stitches'),
tooltip=_('The angle increases in a counter-clockwise direction. 0 is horizontal. Negative angles are allowed.'),
unit='deg',
type='float',
default=0)
@cache
def angle(self):
return math.radians(self.get_float_param('angle', 0))
@property
def color(self):
# SVG spec says the default fill is black
return self.get_style("fill", "#000000")
@property
@param(
'flip',
_('Flip fill (start right-to-left)'),
tooltip=_('The flip option can help you with routing your stitch path. '
'When you enable flip, stitching goes from right-to-left instead of left-to-right.'),
type='boolean',
default=False)
def flip(self):
return self.get_boolean_param("flip", False)
@property
@param('row_spacing_mm',
_('Spacing between rows'),
tooltip=_('Distance between rows of stitches.'),
unit='mm',
type='float',
default=0.25)
def row_spacing(self):
return max(self.get_float_param("row_spacing_mm", 0.25), 0.1 * PIXELS_PER_MM)
@property
def end_row_spacing(self):
return self.get_float_param("end_row_spacing_mm")
@property
@param('max_stitch_length_mm',
_('Maximum fill stitch length'),
tooltip=_('The length of each stitch in a row. Shorter stitch may be used at the start or end of a row.'),
unit='mm',
type='float',
default=3.0)
def max_stitch_length(self):
return max(self.get_float_param("max_stitch_length_mm", 3.0), 0.1 * PIXELS_PER_MM)
@property
@param('staggers',
_('Stagger rows this many times before repeating'),
tooltip=_('Setting this dictates how many rows apart the stitches will be before they fall in the same column position.'),
type='int',
default=4)
def staggers(self):
return self.get_int_param("staggers", 4)
@property
@cache
def paths(self):
return self.flatten(self.parse_path())
@property
@cache
def shape(self):
poly_ary = []
for sub_path in self.paths:
point_ary = []
last_pt = None
for pt in sub_path:
if (last_pt is not None):
vp = (pt[0] - last_pt[0], pt[1] - last_pt[1])
dp = math.sqrt(math.pow(vp[0], 2.0) + math.pow(vp[1], 2.0))
# dbg.write("dp %s\n" % dp)
if (dp > 0.01):
# I think too-close points confuse shapely.
point_ary.append(pt)
last_pt = pt
else:
last_pt = pt
if len(point_ary) > 2:
poly_ary.append(point_ary)
if not poly_ary:
self.fatal(_("shape %s is so small that it cannot be filled with stitches. Please make it bigger or delete it.") % self.node.get('id'))
# shapely's idea of "holes" are to subtract everything in the second set
# from the first. So let's at least make sure the "first" thing is the
# biggest path.
# TODO: actually figure out which things are holes and which are shells
poly_ary.sort(key=lambda point_list: shgeo.Polygon(point_list).area, reverse=True)
polygon = shgeo.MultiPolygon([(poly_ary[0], poly_ary[1:])])
# print >> sys.stderr, "polygon valid:", polygon.is_valid
return polygon
def to_patches(self, last_patch):
stitch_lists = legacy_fill(self.shape,
self.angle,
self.row_spacing,
self.end_row_spacing,
self.max_stitch_length,
self.flip,
self.staggers)
return [Patch(stitches=stitch_list, color=self.color) for stitch_list in stitch_lists]
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