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# Authors: see git history
#
# Copyright (c) 2010 Authors
# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
import math
import sys
import traceback
from shapely import geometry as shgeo
from ..i18n import _
from ..stitches import auto_fill
from ..utils import cache, version
from .element import StitchGroup, param
from .fill import Fill
from .validation import ValidationWarning
class SmallShapeWarning(ValidationWarning):
name = _("Small Fill")
description = _("This fill object is so small that it would probably look better as running stitch or satin column. "
"For very small shapes, fill stitch is not possible, and Ink/Stitch will use running stitch around "
"the outline instead.")
class ExpandWarning(ValidationWarning):
name = _("Expand")
description = _("The expand parameter for this fill object cannot be applied. "
"Ink/Stitch will ignore it and will use original size instead.")
class UnderlayInsetWarning(ValidationWarning):
name = _("Inset")
description = _("The underlay inset parameter for this fill object cannot be applied. "
"Ink/Stitch will ignore it and will use the original size instead.")
class AutoFill(Fill):
element_name = _("AutoFill")
@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=True)
def fill_underlay(self):
return self.get_boolean_param("fill_underlay", default=True)
@property
@param('fill_underlay_angle',
_('Fill angle'),
tooltip=_('Default: fill angle + 90 deg. Insert comma-seperated list for multiple layers.'),
unit='deg',
group=_('AutoFill Underlay'),
type='float')
@cache
def fill_underlay_angle(self):
underlay_angles = self.get_param('fill_underlay_angle', None)
default_value = [self.angle + math.pi / 2.0]
if underlay_angles is not None:
underlay_angles = underlay_angles.strip().split(',')
try:
underlay_angles = [math.radians(float(angle)) for angle in underlay_angles]
except (TypeError, ValueError):
return default_value
else:
underlay_angles = default_value
return underlay_angles
@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(
'fill_underlay_skip_last',
_('Skip last stitch in each row'),
tooltip=_('The last stitch in each row is quite close to the first stitch in the next row. '
'Skipping it decreases stitch count and density.'),
group=_('AutoFill Underlay'),
type='boolean',
default=False)
def fill_underlay_skip_last(self):
return self.get_boolean_param("fill_underlay_skip_last", False)
@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)
@property
@param('underpath',
_('Underpath'),
tooltip=_('Travel inside the shape when moving from section to section. Underpath '
'stitches avoid traveling in the direction of the row angle so that they '
'are not visible. This gives them a jagged appearance.'),
type='boolean',
default=True)
def underpath(self):
return self.get_boolean_param('underpath', True)
@property
@param(
'underlay_underpath',
_('Underpath'),
tooltip=_('Travel inside the shape when moving from section to section. Underpath '
'stitches avoid traveling in the direction of the row angle so that they '
'are not visible. This gives them a jagged appearance.'),
group=_('AutoFill Underlay'),
type='boolean',
default=True)
def underlay_underpath(self):
return self.get_boolean_param('underlay_underpath', True)
def shrink_or_grow_shape(self, amount, validate=False):
if amount:
shape = self.shape.buffer(amount)
# changing the size can empty the shape
# in this case we want to use the original shape rather than returning an error
if shape.is_empty and not validate:
return self.shape
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()
try:
if self.fill_underlay:
for i in range(len(self.fill_underlay_angle)):
stitches.extend(auto_fill(self.underlay_shape,
self.fill_underlay_angle[i],
self.fill_underlay_row_spacing,
self.fill_underlay_row_spacing,
self.fill_underlay_max_stitch_length,
self.running_stitch_length,
self.staggers,
self.fill_underlay_skip_last,
starting_point,
underpath=self.underlay_underpath))
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,
self.skip_last,
starting_point,
ending_point,
self.underpath))
except Exception:
if hasattr(sys, 'gettrace') and sys.gettrace():
# if we're debugging, let the exception bubble up
raise
# for an uncaught exception, give a little more info so that they can create a bug report
message = ""
message += _("Error during autofill! This means that there is a problem with Ink/Stitch.")
message += "\n\n"
# L10N this message is followed by a URL: https://github.com/inkstitch/inkstitch/issues/new
message += _("If you'd like to help us make Ink/Stitch better, please paste this whole message into a new issue at: ")
message += "https://github.com/inkstitch/inkstitch/issues/new\n\n"
message += version.get_inkstitch_version() + "\n\n"
message += traceback.format_exc()
self.fatal(message)
return [StitchGroup(stitches=stitches, color=self.color)]
def validation_warnings(self):
if self.shape.area < 20:
yield SmallShapeWarning(self.shape.centroid)
if self.shrink_or_grow_shape(self.expand, True).is_empty:
yield ExpandWarning(self.shape.centroid)
if self.shrink_or_grow_shape(-self.fill_underlay_inset, True).is_empty:
yield UnderlayInsetWarning(self.shape.centroid)
for warning in super(AutoFill, self).validation_warnings():
yield warning
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