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cubicsuperpath.py

#!/usr/bin/env python
"""
cubicsuperpath.py

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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""
import simplepath 

def CubicSuperPath(simplepath):
    csp = []
    subpath = -1
    subpathstart = []
    last = []
    lastctrl = []
    for s in simplepath:
        cmd, params = s        
        if cmd == 'M':
            if last:
                csp[subpath].append([lastctrl[:],last[:],last[:]])
            subpath += 1
            csp.append([])
            subpathstart =  params[:]
            last = params[:]
            lastctrl = params[:]
        elif cmd == 'L':
            csp[subpath].append([lastctrl[:],last[:],last[:]])
            last = params[:]
            lastctrl = params[:]
        elif cmd == 'C':
            csp[subpath].append([lastctrl[:],last[:],params[:2]])
            last = params[-2:]
            lastctrl = params[2:4]
        elif cmd == 'Q':
            #TODO: convert to cubic
            csp[subpath].append([lastctrl[:],last[:],last[:]])
            last = params[-2:]
            lastctrl = params[-2:]
        elif cmd == 'A':
            #TODO: convert to cubics
            csp[subpath].append([lastctrl[:],last[:],last[:]])
            last = params[-2:]
            lastctrl = params[-2:]
        elif cmd == 'Z':
            csp[subpath].append([lastctrl[:],last[:],last[:]])
            last = subpathstart[:]
            lastctrl = subpathstart[:]
    #append final superpoint
    csp[subpath].append([lastctrl[:],last[:],last[:]])
    return csp    

def unCubicSuperPath(csp):
    a = []
    for subpath in csp:
        if subpath:
            a.append(['M',subpath[0][1][:]])
            for i in range(1,len(subpath)):
                a.append(['C',subpath[i-1][2][:] + subpath[i][0][:] + subpath[i][1][:]])
    return a

def parsePath(d):
    return CubicSuperPath(simplepath.parsePath(d))

def formatPath(p):
    return simplepath.formatPath(unCubicSuperPath(p))





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