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Diffstat (limited to 'share/extensions/perspective.py')
| -rwxr-xr-x | share/extensions/perspective.py | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/share/extensions/perspective.py b/share/extensions/perspective.py deleted file mode 100755 index f7d5be606..000000000 --- a/share/extensions/perspective.py +++ /dev/null @@ -1,164 +0,0 @@ -#!/usr/bin/env python -""" -Copyright (C) 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - -Perspective approach & math by Dmitry Platonov, shadowjack@mail.ru, 2006 -""" -# standard library -import sys -import os -import re -try: - from subprocess import Popen, PIPE - bsubprocess = True -except: - bsubprocess = False -# local library -import inkex -import simplepath -import cubicsuperpath -import simpletransform -from ffgeom import * - -# third party -try: - from numpy import * - from numpy.linalg import * -except: - # Initialize gettext for messages outside an inkex derived class - inkex.localize() - inkex.errormsg(_("Failed to import the numpy or numpy.linalg modules. These modules are required by this extension. Please install them and try again. On a Debian-like system this can be done with the command, sudo apt-get install python-numpy.")) - exit() - -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.")) - exit() - - #obj is selected second - scale = self.unittouu('1px') # convert to document units - doc = self.document.getroot() - h = self.unittouu(doc.xpath('@height', namespaces=inkex.NSS)[0]) - # process viewBox height attribute to correct page scaling - viewBox = doc.get('viewBox') - if viewBox: - viewBox2 = viewBox.split(',') - if len(viewBox2) < 4: - viewBox2 = viewBox.split(' ') - scale *= self.unittouu(self.addDocumentUnit(viewBox2[3])) / h - obj = self.selected[self.options.ids[0]] - envelope = 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 envelope.tag == inkex.addNS('path','svg'): - mat = simpletransform.composeParents(envelope, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]) - path = cubicsuperpath.parsePath(envelope.get('d')) - if len(path) < 1 or len(path[0]) < 4: - inkex.errormsg(_("This extension requires that the second selected path be four nodes long.")) - exit() - simpletransform.applyTransformToPath(mat, path) - dp = zeros((4,2), dtype=float64) - for i in range(4): - dp[i][0] = path[0][i][1][0] - dp[i][1] = path[0][i][1][1] - - #query inkscape about the bounding box of obj - q = {'x':0,'y':0,'width':0,'height':0} - file = self.args[-1] - id = self.options.ids[0] - for query in q.keys(): - if bsubprocess: - p = Popen('inkscape --query-%s --query-id=%s "%s"' % (query,id,file), shell=True, stdout=PIPE, stderr=PIPE) - rc = p.wait() - q[query] = scale*float(p.stdout.read()) - err = p.stderr.read() - else: - f,err = os.popen3('inkscape --query-%s --query-id=%s "%s"' % (query,id,file))[1:] - q[query] = scale*float(f.read()) - f.close() - err.close() - sp = array([[q['x'], q['y']+q['height']],[q['x'], q['y']],[q['x']+q['width'], q['y']],[q['x']+q['width'], q['y']+q['height']]], dtype=float64) - else: - if envelope.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() - - solmatrix = zeros((8,8), dtype=float64) - free_term = zeros((8), dtype=float64) - for i in (0,1,2,3): - solmatrix[i][0] = sp[i][0] - solmatrix[i][1] = sp[i][1] - solmatrix[i][2] = 1 - solmatrix[i][6] = -dp[i][0]*sp[i][0] - solmatrix[i][7] = -dp[i][0]*sp[i][1] - solmatrix[i+4][3] = sp[i][0] - solmatrix[i+4][4] = sp[i][1] - solmatrix[i+4][5] = 1 - solmatrix[i+4][6] = -dp[i][1]*sp[i][0] - solmatrix[i+4][7] = -dp[i][1]*sp[i][1] - free_term[i] = dp[i][0] - free_term[i+4] = dp[i][1] - - res = solve(solmatrix, free_term) - projmatrix = array([[res[0],res[1],res[2]],[res[3],res[4],res[5]],[res[6],res[7],1.0]],dtype=float64) - if obj.tag == inkex.addNS("path",'svg'): - self.process_path(obj,projmatrix) - if obj.tag == inkex.addNS("g",'svg'): - self.process_group(obj,projmatrix) - - def process_group(self,group,m): - for node in group: - if node.tag == inkex.addNS('path','svg'): - self.process_path(node,m) - if node.tag == inkex.addNS('g','svg'): - self.process_group(node,m) - - def process_path(self,path,m): - mat = simpletransform.composeParents(path, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]) - d = path.get('d') - p = cubicsuperpath.parsePath(d) - simpletransform.applyTransformToPath(mat, p) - for subs in p: - for csp in subs: - csp[0] = self.project_point(csp[0],m) - csp[1] = self.project_point(csp[1],m) - csp[2] = self.project_point(csp[2],m) - mat = simpletransform.invertTransform(mat) - simpletransform.applyTransformToPath(mat, p) - path.set('d',cubicsuperpath.formatPath(p)) - - def project_point(self,p,m): - x = p[0] - y = p[1] - return [(x*m[0][0] + y*m[0][1] + m[0][2])/(x*m[2][0]+y*m[2][1]+m[2][2]),(x*m[1][0] + y*m[1][1] + m[1][2])/(x*m[2][0]+y*m[2][1]+m[2][2])] - -if __name__ == '__main__': - e = Project() - e.affect() - - -# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99 |