114 lines
4.5 KiB
Python
114 lines
4.5 KiB
Python
|
#!/usr/bin/env python3
|
||
|
|
|
||
|
|
'''
|
||
|
|
Inkscape extension to copy length of the source path to the selected
|
||
|
|
destination path(s)
|
||
|
|
|
||
|
|
Copyright (C) 2018 Shrinivas Kulkarni
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
This program is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License along
|
||
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
'''
|
||
|
|
|
||
|
|
import inkex
|
||
|
|
import bezmisc
|
||
|
|
from inkex.paths import Path, CubicSuperPath
|
||
|
|
|
||
|
|
class PasteLengthEffect(inkex.Effect):
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
inkex.Effect.__init__(self)
|
||
|
|
self.arg_parser.add_argument('--scale', type = float, default = '1', help = 'Additionally scale the length by')
|
||
|
|
self.arg_parser.add_argument('--scaleFrom', default = 'center', help = 'Scale Path From')
|
||
|
|
self.arg_parser.add_argument('--precision', type = int, default = '5', help = 'Number of significant digits')
|
||
|
|
self.arg_parser.add_argument("--tab", default="sampling", help="Tab")
|
||
|
|
|
||
|
|
def scaleCubicSuper(self, cspath, scaleFactor, scaleFrom):
|
||
|
|
bbox = Path(cspath).bounding_box()
|
||
|
|
|
||
|
|
if(scaleFrom == 'topLeft'):
|
||
|
|
oldOrigin= [bbox.left, bbox.bottom]
|
||
|
|
elif(scaleFrom == 'topRight'):
|
||
|
|
oldOrigin= [bbox.right, bbox.bottom]
|
||
|
|
elif(scaleFrom == 'bottomLeft'):
|
||
|
|
oldOrigin= [bbox.left, ymax]
|
||
|
|
elif(scaleFrom == 'bottomRight'):
|
||
|
|
oldOrigin= [bbox.right, bbox.top]
|
||
|
|
else: #if(scaleFrom == 'center'):
|
||
|
|
oldOrigin= [bbox.left + (bbox.right - bbox.left) / 2., bbox.bottom + (bbox.top - bbox.bottom) / 2.]
|
||
|
|
|
||
|
|
newOrigin = [oldOrigin[0] * scaleFactor , oldOrigin[1] * scaleFactor ]
|
||
|
|
|
||
|
|
for subpath in cspath:
|
||
|
|
for bezierPt in subpath:
|
||
|
|
for i in range(0, len(bezierPt)):
|
||
|
|
|
||
|
|
bezierPt[i] = [bezierPt[i][0] * scaleFactor,
|
||
|
|
bezierPt[i][1] * scaleFactor]
|
||
|
|
|
||
|
|
bezierPt[i][0] += (oldOrigin[0] - newOrigin[0])
|
||
|
|
bezierPt[i][1] += (oldOrigin[1] - newOrigin[1])
|
||
|
|
|
||
|
|
def getPartsFromCubicSuper(self, cspath):
|
||
|
|
parts = []
|
||
|
|
for subpath in cspath:
|
||
|
|
part = []
|
||
|
|
prevBezPt = None
|
||
|
|
for i, bezierPt in enumerate(subpath):
|
||
|
|
if(prevBezPt != None):
|
||
|
|
seg = [prevBezPt[1], prevBezPt[2], bezierPt[0], bezierPt[1]]
|
||
|
|
part.append(seg)
|
||
|
|
prevBezPt = bezierPt
|
||
|
|
parts.append(part)
|
||
|
|
return parts
|
||
|
|
|
||
|
|
def getLength(self, cspath, tolerance):
|
||
|
|
parts = self.getPartsFromCubicSuper(cspath)
|
||
|
|
curveLen = 0
|
||
|
|
|
||
|
|
for i, part in enumerate(parts):
|
||
|
|
for j, seg in enumerate(part):
|
||
|
|
curveLen += bezmisc.bezierlengthSimpson((seg[0], seg[1], seg[2], seg[3]), tolerance = tolerance)
|
||
|
|
|
||
|
|
return curveLen
|
||
|
|
|
||
|
|
def effect(self):
|
||
|
|
scale = self.options.scale
|
||
|
|
scaleFrom = self.options.scaleFrom
|
||
|
|
|
||
|
|
tolerance = 10 ** (-1 * self.options.precision)
|
||
|
|
|
||
|
|
printOut = False
|
||
|
|
selections = self.svg.selected
|
||
|
|
pathNodes = self.document.xpath('//svg:path',namespaces=inkex.NSS)
|
||
|
|
outStrs = [str(len(pathNodes))]
|
||
|
|
|
||
|
|
paths = [(pathNode.get('id'), CubicSuperPath(pathNode.get('d'))) for pathNode in pathNodes]
|
||
|
|
|
||
|
|
if(len(paths) > 1):
|
||
|
|
srcPath = paths[-1][1]
|
||
|
|
srclen = self.getLength(srcPath, tolerance)
|
||
|
|
paths = paths[:len(paths)-1]
|
||
|
|
for key, cspath in paths:
|
||
|
|
curveLen = self.getLength(cspath, tolerance)
|
||
|
|
|
||
|
|
self.scaleCubicSuper(cspath, scaleFactor = scale * (srclen / curveLen), \
|
||
|
|
scaleFrom = scaleFrom)
|
||
|
|
selections[key].set('d', CubicSuperPath(cspath))
|
||
|
|
else:
|
||
|
|
inkex.errormsg(_("Please select at least two paths, with the path whose \
|
||
|
|
length is to be copied at the top. You may have to convert the shape \
|
||
|
|
to path with path->Object to Path."))
|
||
|
|
|
||
|
|
PasteLengthEffect().run()
|