kopia lustrzana https://github.com/inkstitch/inkstitch
161 wiersze
5.9 KiB
Python
161 wiersze
5.9 KiB
Python
import sys
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from .. import _, Point
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from .element import param, EmbroideryElement, Patch
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from ..utils import cache
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warned_about_legacy_running_stitch = False
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class Stroke(EmbroideryElement):
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element_name = "Stroke"
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@property
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@param('satin_column', _('Satin stitch along paths'), type='toggle', inverse=True)
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def satin_column(self):
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return self.get_boolean_param("satin_column")
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@property
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def color(self):
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return self.get_style("stroke")
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@property
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def dashed(self):
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return self.get_style("stroke-dasharray") is not None
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@property
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@param('running_stitch_length_mm', _('Running stitch length'), unit='mm', type='float', default=1.5)
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def running_stitch_length(self):
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return max(self.get_float_param("running_stitch_length_mm", 1.5), 0.01)
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@property
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@param('zigzag_spacing_mm', _('Zig-zag spacing (peak-to-peak)'), unit='mm', type='float', default=0.4)
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@cache
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def zigzag_spacing(self):
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return max(self.get_float_param("zigzag_spacing_mm", 0.4), 0.01)
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@property
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@param('repeats', _('Repeats'), type='int', default="1")
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def repeats(self):
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return self.get_int_param("repeats", 1)
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@property
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def paths(self):
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path = self.parse_path()
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if self.manual_stitch_mode:
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return [self.strip_control_points(subpath) for subpath in path]
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else:
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return self.flatten(path)
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@property
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@param('manual_stitch', _('Manual stitch placement'), tooltip=_("Stitch every node in the path. Stitch length and zig-zag spacing are ignored."), type='boolean', default=False)
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def manual_stitch_mode(self):
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return self.get_boolean_param('manual_stitch')
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def is_running_stitch(self):
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# using stroke width <= 0.5 pixels to indicate running stitch is deprecated in favor of dashed lines
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try:
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stroke_width = float(self.get_style("stroke-width"))
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except ValueError:
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stroke_width = 1
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if self.dashed:
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return True
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elif stroke_width <= 0.5 and self.get_float_param('running_stitch_length_mm', None) is not None:
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# if they use a stroke width less than 0.5 AND they specifically set a running stitch
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# length, then assume they intend to use the deprecated <= 0.5 method to set running
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# stitch.
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#
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# Note that we use self.get_style("stroke_width") _not_ self.stroke_width above. We
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# explicitly want the stroke width in "user units" ("document units") -- that is, what
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# the user sees in inkscape's stroke settings.
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#
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# Also note that we don't use self.running_stitch_length_mm above. This is because we
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# want to see if they set a running stitch length at all, and the property will apply
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# a default value.
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#
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# Thsi is so tricky, and and intricate that's a major reason that we deprecated the
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# 0.5 units rule.
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# Warn them the first time.
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global warned_about_legacy_running_stitch
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if not warned_about_legacy_running_stitch:
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warned_about_legacy_running_stitch = True
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print >> sys.stderr, _("Legacy running stitch setting detected!\n\nIt looks like you're using a stroke " + \
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"smaller than 0.5 units to indicate a running stitch, which is deprecated. Instead, please set " + \
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"your stroke to be dashed to indicate running stitch. Any kind of dash will work.")
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# still allow the deprecated setting to work in order to support old files
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return True
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else:
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return False
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def stroke_points(self, emb_point_list, zigzag_spacing, stroke_width):
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# TODO: use inkstitch.stitches.running_stitch
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patch = Patch(color=self.color)
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p0 = emb_point_list[0]
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rho = 0.0
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side = 1
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last_segment_direction = None
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for repeat in xrange(self.repeats):
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if repeat % 2 == 0:
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order = range(1, len(emb_point_list))
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else:
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order = range(-2, -len(emb_point_list) - 1, -1)
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for segi in order:
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p1 = emb_point_list[segi]
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# how far we have to go along segment
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seg_len = (p1 - p0).length()
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if (seg_len == 0):
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continue
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# vector pointing along segment
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along = (p1 - p0).unit()
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# vector pointing to edge of stroke width
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perp = along.rotate_left() * (stroke_width * 0.5)
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if stroke_width == 0.0 and last_segment_direction is not None:
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if abs(1.0 - along * last_segment_direction) > 0.5:
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# if greater than 45 degree angle, stitch the corner
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rho = zigzag_spacing
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patch.add_stitch(p0)
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# iteration variable: how far we are along segment
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while (rho <= seg_len):
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left_pt = p0 + along * rho + perp * side
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patch.add_stitch(left_pt)
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rho += zigzag_spacing
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side = -side
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p0 = p1
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last_segment_direction = along
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rho -= seg_len
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if (p0 - patch.stitches[-1]).length() > 0.1:
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patch.add_stitch(p0)
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return patch
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def to_patches(self, last_patch):
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patches = []
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for path in self.paths:
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path = [Point(x, y) for x, y in path]
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if self.manual_stitch_mode:
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patch = Patch(color=self.color, stitches=path, stitch_as_is=True)
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elif self.is_running_stitch():
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patch = self.stroke_points(path, self.running_stitch_length, stroke_width=0.0)
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else:
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patch = self.stroke_points(path, self.zigzag_spacing / 2.0, stroke_width=self.stroke_width)
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patches.append(patch)
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return patches
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