import sys, inkex, os, re, simplepath, cubicsuperpath

from ffgeom import *

from numpy import *

from numpy.linalg import *

uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'pc':15.0}

def unittouu(string):

unit = re.compile('(%s)$' % '|'.join(uuconv.keys()))

param = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)')

p = param.match(string)

u = unit.search(string)

if p:

retval = float(p.string[p.start():p.end()])

else:

retval = 0.0

if u:

try:

return retval * uuconv[u.string[u.start():u.end()]]

except KeyError:

pass

return retval

class Project(inkex.Effect):

def __init__(self):

inkex.Effect.__init__(self)

def effect(self):

if len(self.options.ids) < 2:

inkex.debug("Requires two selected paths. The second must be exctly four nodes long.")

exit()

#obj is selected second

obj = self.selected[self.options.ids[0]]

envelope = self.selected[self.options.ids[1]]

if (obj.tagName == 'path' or obj.tagName == 'g') and envelope.tagName == 'path':

path = cubicsuperpath.parsePath(envelope.attributes.getNamedItem('d').value)

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():

f = os.popen("inkscape --query-%s --query-id=%s %s" % (query,id,file))

q[query] = float(f.read())

f.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)

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.tagName == "path":

self.process_path(obj,projmatrix)

if obj.tagName == "g":

self.process_group(obj,projmatrix)

def process_group(self,group,m):

for node in group.childNodes:

if node.nodeType==node.ELEMENT_NODE:

if node.tagName == 'path':

self.process_path(node,m)

if node.tagName == 'g':

self.process_group(node,m)

def process_path(self,path,m):

d = path.attributes.getNamedItem('d')

p = cubicsuperpath.parsePath(d.value)

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)

d.value = 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])]

e = Project()

e.affect()