share/extensions/cubicsuperpath.py

   1 #!/usr/bin/env python
   2 """
   3 cubicsuperpath.py
   4
   5 Copyright (C) 2005 Aaron Spike, aaron@ekips.org
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20
  21 """
  22 import simplepath
  23
  24 def CubicSuperPath(simplepath):
  25         csp = []
  26         subpath = -1
  27         subpathstart = []
  28         last = []
  29         lastctrl = []
  30         for s in simplepath:
  31                 cmd, params = s
  32                 if cmd == 'M':
  33                         if last:
  34                                 csp[subpath].append([lastctrl[:],last[:],last[:]])
  35                         subpath += 1
  36                         csp.append([])
  37                         subpathstart =  params[:]
  38                         last = params[:]
  39                         lastctrl = params[:]
  40                 elif cmd == 'L':
  41                         csp[subpath].append([lastctrl[:],last[:],last[:]])
  42                         last = params[:]
  43                         lastctrl = params[:]
  44                 elif cmd == 'C':
  45                         csp[subpath].append([lastctrl[:],last[:],params[:2]])
  46                         last = params[-2:]
  47                         lastctrl = params[2:4]
  48                 elif cmd == 'Q':
  49                         #TODO: convert to cubic
  50                         csp[subpath].append([lastctrl[:],last[:],last[:]])
  51                         last = params[-2:]
  52                         lastctrl = params[-2:]
  53                 elif cmd == 'A':
  54                         #TODO: convert to cubics
  55                         csp[subpath].append([lastctrl[:],last[:],last[:]])
  56                         last = params[-2:]
  57                         lastctrl = params[-2:]
  58                 elif cmd == 'Z':
  59                         csp[subpath].append([lastctrl[:],last[:],last[:]])
  60                         last = subpathstart[:]
  61                         lastctrl = subpathstart[:]
  62         #append final superpoint
  63         csp[subpath].append([lastctrl[:],last[:],last[:]])
  64         return csp
  65
  66 def unCubicSuperPath(csp):
  67         a = []
  68         for subpath in csp:
  69                 if subpath:
  70                         a.append(['M',subpath[0][1][:]])
  71                         for i in range(1,len(subpath)):
  72                                 a.append(['C',subpath[i-1][2][:] + subpath[i][0][:] + subpath[i][1][:]])
  73         return a
  74
  75 def parsePath(d):
  76         return CubicSuperPath(simplepath.parsePath(d))
  77
  78 def formatPath(p):
  79         return simplepath.formatPath(unCubicSuperPath(p))
  80
  81
  82
  83