kopia lustrzana https://github.com/inkstitch/inkstitch
Rewrite outline extensions (#2881)
Kaalleen
GitHub
rodzic
62b8529120
commit
958cb4210a
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@ -3,48 +3,80 @@
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# Copyright (c) 2010 Authors
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# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
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import inkex
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from shapely import concave_hull
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from shapely.geometry import LineString, MultiPolygon
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from inkex import Boolean, Path, errormsg
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from shapely import offset_curve
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from shapely.geometry import LineString, MultiPolygon, Polygon
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from ..i18n import _
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from ..svg import PIXELS_PER_MM
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from ..svg.tags import SVG_PATH_TAG
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from ..utils.geometry import ensure_multi_line_string
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from ..utils.smoothing import smooth_path
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from .base import InkstitchExtension
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class Outline(InkstitchExtension):
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def __init__(self, *args, **kwargs):
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InkstitchExtension.__init__(self, *args, **kwargs)
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self.arg_parser.add_argument("-r", "--ratio", type=float, default=0.0, dest="ratio")
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self.arg_parser.add_argument("-a", "--allow-holes", type=inkex.Boolean, default=False, dest="allow_holes")
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self.arg_parser.add_argument("-k", "--keep-original", type=Boolean, default=False, dest="keep_original")
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self.arg_parser.add_argument("-b", "--buffer", type=float, default=0.001, dest="buffer")
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self.arg_parser.add_argument("-s", "--smoothness", type=float, default=0.3, dest="smoothness")
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self.arg_parser.add_argument("-t", "--threshold", type=float, default=10.0, dest="threshold")
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self.arg_parser.add_argument("-i", "--inset", type=float, default=0.001, dest="inset")
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def effect(self):
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if not self.svg.selection:
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inkex.errormsg(_("Please select one or more shapes to convert to their outline."))
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errormsg(_("Please select one or more shapes to convert to their outline."))
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return
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self.threshold = self.options.threshold * PIXELS_PER_MM
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self.shape_buffer = max(self.options.buffer * PIXELS_PER_MM, 0.001)
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self.smoothness = self.options.smoothness * PIXELS_PER_MM
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self.inset = self.options.inset * PIXELS_PER_MM
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for element in self.svg.selection:
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self.element_to_outline(element)
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def get_outline(self, element):
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d = ''
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transform = element.composed_transform()
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path = Path(element.get_path()).transform(transform).break_apart()
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for subpath in path:
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points = subpath.end_points
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shape = LineString(points).buffer(self.shape_buffer)
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outline = ensure_multi_line_string(offset_curve(shape, -self.inset))
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interiors = []
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for interior in outline.geoms:
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if Polygon(interior).area < self.threshold:
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continue
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interior_path = smooth_path(interior.coords, self.smoothness)
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if len(interior_path) > 2:
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interiors.append(Polygon(interior_path))
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outline = MultiPolygon(interiors)
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for geom in outline.geoms:
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d += str(Path(geom.exterior.coords).transform(-transform))
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return d
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def element_to_outline(self, element):
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if element.tag_name == 'g':
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for element in element.iterdescendants(SVG_PATH_TAG):
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self.element_to_outline(element)
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return
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path = element.get_path()
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path = path.end_points
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hull = concave_hull(LineString(path), ratio=self.options.ratio, allow_holes=self.options.allow_holes)
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if isinstance(hull, LineString):
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elif element.tag_name != 'path':
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element_id = element.label or element.get_id()
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errormsg(_("{element_id} is not a path element. "
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"This extension is designed to generate an outline of an embroidery pattern.").format(element_id=element_id))
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return
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if not isinstance(hull, MultiPolygon):
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hull = MultiPolygon([hull])
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d = ''
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for geom in hull.geoms:
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d += 'M '
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for x, y in geom.exterior.coords:
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d += f'{x}, {y} '
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d += "Z"
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d = self.get_outline(element)
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if not d:
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errormsg(_("Could not generate path from element {element_id} with the given settings.").format(element_id=element_id))
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return
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element.set('d', d)
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if self.options.keep_original:
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new_element = element.duplicate()
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new_element.set('d', d)
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else:
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element.set('d', d)
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@ -11,8 +11,21 @@
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</submenu>
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</effects-menu>
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</effect>
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<param name="ratio" type="float" appearance="full" gui-text="Ratio" precision="2" min="0" max="1">0</param>
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<param name="allow-holes" type="boolean" gui-text="Allow Holes">false</param>
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<param name="keep-original" type="boolean" gui-text="Keep original element(s)">false</param>
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<spacer />
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<separator />
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<spacer />
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<param name="threshold" type="float" appearance="full" precision="2" min="0" max="100"
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gui-text="Threshold (mm²)" gui-description="Removes smaller shape areas than that">10</param>
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<param name="buffer" type="float" appearance="full" precision="3" min="0.001" max="1"
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gui-text="Buffer (mm)" gui-description="Enlarge strokes by this amount">0.001</param>
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<param name="smoothness" type="float" appearance="full" precision="2" min="0.01" max="5"
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gui-text="Smoothness (mm)" gui-description="Smooth path by this amount">0.3</param>
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<spacer />
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<separator />
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<spacer />
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<param name="inset" type="float" appearance="full" precision="3" min="0" max="5"
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gui-text="Inset (mm)" gui-description="Counteract the buffer effect">0</param>
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<script>
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{{ command_tag | safe }}
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</script>
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