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#!/usr/bin/env python
# James Maddison
import getopt
import sys
try:
import psyco
psyco.full()
except:
pass
import vtktools
def EPrint(message):
"""
Send an error message to standard error
"""
sys.stderr.write(message + "\n")
sys.stderr.flush()
return
def Help():
"""
Prints program usage information
"""
print "Usage: vtudiff [OPTIONS] ... INPUT1 INPUT2 OUTPUT [FIRST] [LAST]\n" + \
"\n" + \
"Generates vtus with fields equal to the difference between the corresponding\n" + \
"fields in two input vtus (INPUT1 - INPUT2). The fields of INPUT2 are projected\n" + \
"onto the cell points of INPUT1.\n" + \
"\n" + \
"If FIRST is supplied, treats INPUT1 and INPUT2 as project names, and generates\n" + \
"a different vtu for the specified range of output files.\n" + \
"\n" + \
"Options:\n" + \
"\n" + \
"-s If supplied together with FIRST and LAST, only INPUT1 is treated as a\n" + \
" project name. Allows a range of vtus to be diffed against a single vtu."
return
def Error(message, displayHelp = True):
"""
Print an error message, usage information and quit
"""
if displayHelp:
Help()
EPrint(message)
sys.exit(1)
try:
opts, args = getopt.getopt(sys.argv[1:], "ms")
except:
Help()
sys.exit(1)
if len(args) > 5:
Error("Invalid argument \"" + args[5] + "\" supplied")
diffAgainstSingle = ("-s", "") in opts
try:
inputFilename1 = args[0]
inputFilename2 = args[1]
outputFilename = args[2]
except:
Help()
sys.exit(1)
if len(args) > 3:
try:
firstId = int(args[3])
if len(args) > 4:
try:
lastId = int(args[4])
except:
Error("Invalid last ID entered")
else:
lastId = firstId
except:
Error("Invalid first ID entered")
else:
firstId = None
if firstId is None:
inputFilenames1 = [inputFilename1]
inputFilenames2 = [inputFilename2]
outputFilenames = [outputFilename]
else:
inputFilenames1 = [inputFilename1 + "_" + str(i) + ".vtu" for i in range(firstId, lastId + 1)]
if diffAgainstSingle:
inputFilenames2 = [inputFilename2 for i in range(firstId, lastId + 1)]
else:
inputFilenames2 = [inputFilename2 + "_" + str(i) + ".vtu" for i in range(firstId, lastId + 1)]
outputFilenames = [outputFilename + "_" + str(i) + ".vtu" for i in range(firstId, lastId + 1)]
for i in range(len(inputFilenames1)):
try:
vtu1 = vtktools.vtu(inputFilenames1[i])
except:
Error("Unable to read input vtu \"" + inputFilenames1[i] + "\"", False)
try:
vtu2 = vtktools.vtu(inputFilenames2[i])
except:
Error("Unable to read input vtu \"" + inputFilenames2[i] + "\"", False)
diffVtu = vtktools.VtuDiff(vtu1, vtu2, outputFilenames[i])
try:
diffVtu.Write()
except:
Help()
Error("Unable to write output file \"" + outputFilenames[i] + "\"", False)
print "Generated vtu diff file \"" + outputFilenames[i] + "\""
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