# script to delete the normal data from an OBJ file
# written by PhilC
# http://www.philc.net
# use however you like but at your own risk.

import poser
import os

def main():
    # get open filepath
    filepath = openFile()
    #read file to lines
    lines = ReadFileToLines(filepath)    
    newLines = []
    print "Processing file....."
    for line in lines:
        if "vn " in line:
            pass
        else:
            newLines.append(line)
    # get save filepath
    filepath = saveFile()
    SaveLinesToFile(newLines,filepath)
    print "File saved to %s" % filepath
    
def openFile():
    Type = poser.kDialogFileChooserOpen
    parentDialog = 1
    message = "browse for obj file"
    startDir = os.path.join(os.curdir,'*.obj')
    dlg = poser.DialogFileChooser(Type, parentDialog, message, startDir)
    dlg.Show()
    filepath = dlg.Path()
    return filepath

def saveFile():
    Type = poser.kDialogFileChooserSave
    parentDialog = 1
    message = "save as"
    startDir = os.path.join(os.curdir,'*.obj')
    dlg = poser.DialogFileChooser(Type, parentDialog, message, startDir)
    dlg.Show()
    filepath = dlg.Path()
    return filepath

def ReadFileToLines(filepath):
    singleline = 0
    fd = open(filepath, 'rb')
    s = fd.read()
    fd.close()
    if string.find(s, '\r\n') > -1:
        delim = '\r\n'
    elif string.find(s, '\n') > -1:
        delim = '\n'
    elif string.find(s, '\r') > -1:
        delim = '\r'
    else:
        singleline = 1
    if not singleline:
        lines = string.split(s, delim)
    else:
        lines = [s]
    return lines

def SaveLinesToFile(lines, filepath):
    fd = open(filepath, 'wb')
    s = string.join(lines, '\n')
    fd.write(s)
    fd.close()

main()