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Why not draw it such that you can use either the horizontal or vertical flip function?
Yes it can be. If you activate Snap to path and Snap to cusp nodeUktrunie wrote:The alignment is not 100% super ultra perfectly exact, but...
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#!/usr/bin/env python
"""
Derived from the "envelope" extension by Aaron Spike, aaron@ekips.org
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
import inkex, os, simplepath, cubicsuperpath
from ffgeom import *
import gettext
_ = gettext.gettext
try:
from subprocess import Popen, PIPE
bsubprocess = True
except:
bsubprocess = False
class Project(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
def effect(self):
if len(self.options.ids) < 2:
inkex.errormsg(_("This extension requires two selected paths. \nThe second path must be exactly two nodes long."))
exit()
#obj is selected second
obj = self.selected[self.options.ids[0]]
trafo = self.selected[self.options.ids[1]]
if obj.get(inkex.addNS('type','sodipodi')):
inkex.errormsg(_("The first selected object is of type '%s'.\nTry using the procedure Path->Object to Path." % obj.get(inkex.addNS('type','sodipodi'))))
exit()
if obj.tag == inkex.addNS('path','svg') or obj.tag == inkex.addNS('g','svg'):
if trafo.tag == inkex.addNS('path','svg'):
#distil trafo into two node points
trafo = cubicsuperpath.parsePath(trafo.get('d'))
if len(trafo[0]) < 2:
inkex.errormsg(_("This extension requires that the second selected path be two nodes long."))
exit()
trafo = [[Point(csp[1][0],csp[1][1]) for csp in subs] for subs in trafo][0][:2]
#START HERE!!!
self.orig = [trafo[0]['x'], trafo[0]['y']]
self.vect = vect_dif([trafo[1]['x'], trafo[1]['y']], self.orig)
self.norm = vect_norm(self.vect)
self.unit = [self.vect[0]/self.norm, self.vect[1]/self.norm]
if obj.tag == inkex.addNS("path",'svg'):
self.process_path(obj)
if obj.tag == inkex.addNS("g",'svg'):
self.process_group(obj)
else:
if trafo.tag == inkex.addNS('g','svg'):
inkex.errormsg(_("The second selected object is a group, not a path.\nTry using the procedure Object->Ungroup."))
else:
inkex.errormsg(_("The second selected object is not a path.\nTry using the procedure Path->Object to Path."))
exit()
else:
inkex.errormsg(_("The first selected object is not a path.\nTry using the procedure Path->Object to Path."))
exit()
def process_group(self,group):
for node in group:
if node.tag == inkex.addNS('path','svg'):
self.process_path(node)
if node.tag == inkex.addNS('g','svg'):
self.process_group(node)
def process_path(self,path):
d = path.get('d')
p = cubicsuperpath.parsePath(d)
for subs in p:
for csp in subs:
csp[0] = self.trafopoint(csp[0])
csp[1] = self.trafopoint(csp[1])
csp[2] = self.trafopoint(csp[2])
path.set('d',cubicsuperpath.formatPath(p))
def trafopoint(self,(x,y)):
# x1' = -x1 + 2xo + 2n^[(x1 - xo).n^]
return vect_sub(vect_add(vect_mul(self.orig, 2), vect_mul(self.unit, 2 * dot_prod(vect_sub([x, y], self.orig), self.unit))), [x, y])
def vect_dif((x1, y1), (x2, y2)):
return [x2-x1, y2-y1]
def sum_sq((x, y)):
return x**2 + y**2
def vect_norm((x,y)):
return sum_sq([x, y])**.5
def vect_add((x1, y1), (x2, y2)):
return [x1+x2, y1+y2]
def vect_sub((x1, y1), (x2, y2)):
return [x1-x2, y1-y2]
def vect_mul((x, y), s):
return [x*s, y*s]
def dot_prod((x1, y1), (x2, y2)):
return (x1 * x2) + (y1 * y2)
if __name__ == '__main__':
e = Project()
e.affect()
# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99
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<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
<_name>Mirror</_name>
<id>test.apex.mirror</id>
<dependency type="executable" location="extensions">mirror.py</dependency>
<dependency type="executable" location="extensions">inkex.py</dependency>
<effect>
<object-type>path</object-type>
<effects-menu>
<submenu _name="Modify Path"/>
</effects-menu>
</effect>
<script>
<command reldir="extensions" interpreter="python">mirror.py</command>
</script>
</inkscape-extension>Apex wrote:I found myself needing to do the very same thing this week, I resorted to hacking some python (a first for me), I thought I would share the results!
Pretty simple, to use, duplicate your object, shift-select your axis for reflection and then pick the mirror extension.
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=== modified file 'src/live_effects/effect.cpp'
--- src/live_effects/effect.cpp 2011-02-21 07:59:34 +0000
+++ src/live_effects/effect.cpp 2011-02-21 08:13:27 +0000
@@ -5,7 +5,7 @@
* Released under GNU GPL, read the file 'COPYING' for more information
*/
-//#define LPE_ENABLE_TEST_EFFECTS
+#define LPE_ENABLE_TEST_EFFECTS
#include "live_effects/effect.h"
Yes to both:Grobe wrote: Is it possible to make new py files in some folder in Inkscape install dir and just run it like that?
If you tell us which OS you use, we might be able to help with detailed instructions.Grobe wrote:If so, where shall I put the files for it to work?
The extension is listed as 'Extensions > Modify Path > Mirror'Grobe wrote:I cannot find it under any menu.
Apex wrote:Code: Select all
<_name>Mirror</_name>Code: Select all
<submenu _name="Modify Path"/>
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C:\Documents and Settings\<Username>\Programdata\inkscape\extensions
Does it work with the files from the attached zip archive? (BTW - you did restart Inkscape after placing the files into %APPDATA%\Inkscape\extensions? Inkscape only scans for and loads extensions at launch time)Grobe wrote:Still, the menu "Extensions > Modify Path > Mirror" isn't to be found there :cry:
