File: //usr/share/inkscape/extensions/pathalongpath.pyc
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Copyright (C) 2006 Jean-Francois Barraud, barraud@math.univ-lille1.fr
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.
barraud@math.univ-lille1.fr
Quick description:
This script deforms an object (the pattern) along other paths (skeletons)...
The first selected object is the pattern
the last selected ones are the skeletons.
Imagine a straight horizontal line L in the middle of the bounding box of the pattern.
Consider the normal bundle of L: the collection of all the vertical lines meeting L.
Consider this as the initial state of the plane; in particular, think of the pattern
as painted on these lines.
Now move and bend L to make it fit a skeleton, and see what happens to the normals:
they move and rotate, deforming the pattern.
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This function receives a component of a 'cubicsuperpath' and returns two things:
The path subdivided in many straight segments, and an array containing the length of each segment.
We could work with bezier path as well, but bezier arc lengths are (re)computed for each point
in the deformed object. For complex paths, this might take a while.
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--copymodet copymodes( repeat the path to fit deformer's lengths -ps --spacet spaces -vs
--verticalt inkboolt verticals reference path is verticals -ds --duplicatet duplicates$ duplicate pattern before deformations --tabt tabs' The selected UI-tab when OK was pressed( t pathmodifiert Diffeot __init__t OptionParsert
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Recieves an arc length l, and returns the index of the segment in self.skelcomp
containing the corresponding point, to gether with the position of the point on this segment.
If the deformer is closed, do computations modulo the toal length.
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The kernel of this stuff:
bpt is a base point and for v in vectors, v'=v-p is a tangent vector at bpt.
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| d f � q�Wq{W| j j r�t | � n | | 7} qmWq&W| j/ d t j0 | � � q�q�Wd S( Ni s+ This extension requires two selected paths.t Ribbont Singlet Repeateds Single, stretcheds Repeated, stretchedi i i g{�G�z�?sn The total length of the pattern is too small :
Please choose a larger object or set 'Space between copies' > 0R t svgR i����sh The 'stretch' option requires that the pattern must have non-zero width :
Please edit the pattern width.(1 R
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formatPath( R: t bboxt widthR RG t nodeR t p0t newpt skelnodet compR t lengtht xoffsett yoffsett NbCopiesR t subR t ctlpt( ( s/ /usr/share/inkscape/extensions/pathalongpath.pyt effect� s�
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