123 lines
3.2 KiB
Python
123 lines
3.2 KiB
Python
# coding=utf-8
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#
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# Copyright (C) 2018 Martin Owens <doctormo@gmail.com>
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# Copyright (C) 2023 Jonathan Neuhauser <jonathan.neuhauser@outlook.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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"""Paths module.
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Most of the functions derivative, unit_tangent, curvature, point, split, length, ilength
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for the individual path commands are ported from
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https://github.com/mathandy/svgpathtools/ (MIT licensed)
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"""
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from typing import Union
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from ..transforms import ComplexLike
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from .interfaces import (
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PathCommand,
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AbsolutePathCommand,
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RelativePathCommand,
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LengthSettings,
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ILengthSettings,
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)
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from .lines import Line, line, Move, move, ZoneClose, zoneClose, Horz, horz, Vert, vert
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from .curves import curve, Curve, smooth, Smooth
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from .quadratic import quadratic, Quadratic, tepidQuadratic, TepidQuadratic
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from .arc import Arc, arc, arc_to_path, matprod, rotmat, applymat, norm
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from .path import CubicSuperPath, Path, InvalidPath
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import numpy as np
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np.seterr(invalid="raise")
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# definitions that can't be inside the class due to circular dependencies
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def to_curve(self, prev: ComplexLike, prev_prev: ComplexLike = 0) -> Curve:
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"""Convert command to :py:class:`Curve`
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Curve().to_curve() returns a copy
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"""
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return Curve(*self.ccurve_points(0 + 0j, complex(prev), complex(prev_prev)))
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def to_line(self, prev: ComplexLike) -> Line:
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"""Converts this segment to a line (copies if already a line)"""
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return Line(self.cend_point(0, complex(prev)))
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PathCommand.to_curve = to_curve # type: ignore
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PathCommand.to_line = to_line # type: ignore
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PathCommand._letter_to_class = { # pylint: disable=protected-access
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"M": Move,
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"L": Line,
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"V": Vert,
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"H": Horz,
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"A": Arc,
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"C": Curve,
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"S": Smooth,
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"Z": ZoneClose,
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"Q": Quadratic,
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"T": TepidQuadratic,
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"m": move,
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"l": line,
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"v": vert,
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"h": horz,
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"a": arc,
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"c": curve,
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"s": smooth,
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"z": zoneClose,
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"q": quadratic,
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"t": tepidQuadratic,
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}
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# All the names that get added to the inkex API itself.
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__all__ = (
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"Path",
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"CubicSuperPath",
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"PathCommand",
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"AbsolutePathCommand",
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"RelativePathCommand",
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# Path commands:
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"Line",
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"line",
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"Move",
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"move",
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"ZoneClose",
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"zoneClose",
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"Horz",
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"horz",
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"Vert",
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"vert",
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"Curve",
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"curve",
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"Smooth",
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"smooth",
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"Quadratic",
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"quadratic",
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"TepidQuadratic",
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"tepidQuadratic",
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"Arc",
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"arc",
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# errors
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"InvalidPath",
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# structs
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"LengthSettings",
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"ILengthSettings",
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)
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