io_import_scene_mhx.py

# ##### BEGIN GPL LICENSE BLOCK #####
#
#  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####

bl_addon_info = {
    "name": "Import: MakeHuman (.mhx)",
    "author": "Thomas Larsson",
    "version": "0.9, Make Human Alpha 5",
    "blender": (2, 5, 3),
    "location": "File > Import",
    "description": "Import files in the MakeHuman eXchange format (.mhx)",
    "warning": "",
    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/Scripts/File_I-O/Make_Human",
    "tracker_url": "https://projects.blender.org/tracker/index.php?func=detail&aid=21872&group_id=153&atid=469",
    "category": "Import/Export"}

""" 
**Project Name:**	  MakeHuman

**Product Home Page:** http://www.makehuman.org/

**Code Home Page:**	http://code.google.com/p/makehuman/

**Authors:**		   Thomas Larsson

**Copyright(c):**	  MakeHuman Team 2001-2010

**Licensing:**		 GPL3 (see also http://sites.google.com/site/makehumandocs/licensing)

**Coding Standards:**  See http://sites.google.com/site/makehumandocs/developers-guide

Abstract
MHX (MakeHuman eXchange format) importer for Blender 2.5x.
Version 0.9

"""

"""
Place this file in the .blender/scripts/addons dir
You have to activated the script in the "Add-Ons" tab (user preferences).
Access from the File > Import menu.
"""

#
#
#

import bpy
import os
import time
import mathutils
from mathutils import *
import geometry
import string

MAJOR_VERSION = 0
MINOR_VERSION = 9
MHX249 = False
Blender24 = False
Blender25 = True
TexDir = "~/makehuman/exports"

#
#
#

theScale = 1.0
useMesh = 1
doSmash = 1
verbosity = 2
warnedTextureDir = False
warnedVersion = False

true = True
false = False
Epsilon = 1e-6
nErrors = 0
theTempDatum = None

todo = []

#
#	toggle flags
#

T_ArmIK = 0x01
T_LegIK = 0x02
T_Replace = 0x20
T_Face = 0x40
T_Shape = 0x80
T_Mesh = 0x100
T_Armature = 0x200
T_Proxy = 0x400
T_Panel = 0x800

T_Rigify = 0x1000
T_Preset = 0x2000
T_Symm = 0x4000
T_MHX = 0x8000

toggle = T_Replace + T_ArmIK + T_LegIK + T_Mesh + T_Armature + T_Face

#
#	setFlagsAndFloats(rigFlags):
#
#	Global floats
fLegIK = 0.0
fArmIK = 0.0
fFingerPanel = 0.0
fFingerIK = 0.0
fFingerCurl = 0.0

#	rigLeg and rigArm flags
T_Toes = 0x0001
T_GoboFoot = 0x0002
T_InvFoot = 0x0004

T_FingerPanel = 0x100
T_FingerCurl = 0x0200
T_FingerIK = 0x0400


T_LocalFKIK = 0x8000

rigLeg = 0
rigArm = 0

def setFlagsAndFloats(rigFlags):
	global toggle, rigLeg, rigArm

	(footRig, fingerRig) = rigFlags
	rigLeg = 0
	rigArm = 0
	if footRig == 'Reverse foot': rigLeg |= T_InvFoot
	elif footRig == 'Gobo': rigLeg |= T_GoboFoot

	if fingerRig == 'Panel': rigArm |= T_FingerPanel
	elif fingerRig == 'IK': rigArm |= T_FingerIK
	elif fingerRig == 'Curl': rigArm |= T_FingerCurl

	toggle |= T_Panel

	# Global floats, used as influences
	global fFingerCurl, fLegIK, fArmIK, fFingerIK

	fFingerCurl = 1.0 if rigArm&T_FingerCurl else 0.0
	fLegIK = 1.0 if toggle&T_LegIK else 0.0
	fArmIK = 1.0 if toggle&T_ArmIK else 0.0
	fFingerIK = 1.0 if rigArm&T_FingerIK else 0.0

	return


#
#	Dictionaries
#

loadedData = {
	'NONE' : {},

	'Object' : {},
	'Mesh' : {},
	'Armature' : {},
	'Lamp' : {},
	'Camera' : {},
	'Lattice' : {},
	'Curve' : {},

	'Material' : {},
	'Image' : {},
	'MaterialTextureSlot' : {},
	'Texture' : {},
	
	'Bone' : {},
	'BoneGroup' : {},
	'Rigify' : {},

	'Action' : {},
	'Group' : {},

	'MeshTextureFaceLayer' : {},
	'MeshColorLayer' : {},
	'VertexGroup' : {},
	'ShapeKey' : {},
	'ParticleSystem' : {},

	'ObjectConstraints' : {},
	'ObjectModifiers' : {},
	'MaterialSlot' : {},
}

Plural = {
	'Object' : 'objects',
	'Mesh' : 'meshes',
	'Lattice' : 'lattices',
	'Curve' : 'curves',
	'Group' : 'groups',
	'Empty' : 'empties',
	'Armature' : 'armatures',
	'Bone' : 'bones',
	'BoneGroup' : 'bone_groups',
	'Pose' : 'poses',
	'PoseBone' : 'pose_bones',
	'Material' : 'materials',
	'Texture' : 'textures',
	'Image' : 'images',
	'Camera' : 'cameras',
	'Lamp' : 'lamps',
	'World' : 'worlds',
}

#
#	Creators
#

def uvtexCreator(me, name):
	print("uvtexCreator", me, name)
	me.add_uv_texture()
	uvtex = me.uv_textures[-1]
	uvtex.name = name
	return uvtex


def vertcolCreator(me, name):
	print("vertcolCreator", me, name)
	me.add_vertex_color()
	vcol = me.vertex_colors[-1]
	vcol.name = name
	return vcol
		

#
#	loadMhx(filePath, context, flags):
#

def loadMhx(filePath, context, flags):
	global toggle
	toggle = flags
	readMhxFile(filePath)
	return

#
#	readMhxFile(filePath, rigFlags):
#

def readMhxFile(filePath, rigFlags):
	global todo, nErrors
	
	fileName = os.path.expanduser(filePath)
	(shortName, ext) = os.path.splitext(fileName)
	if ext != ".mhx":
		print("Error: Not a mhx file: " + fileName)
		return
	print( "Opening MHX file "+ fileName )
	time1 = time.clock()

	ignore = False
	stack = []
	tokens = []
	key = "toplevel"
	level = 0
	nErrors = 0

	setFlagsAndFloats(rigFlags)

	file= open(fileName, "rU")
	print( "Tokenizing" )
	lineNo = 0
	for line in file: 
		# print(line)
		lineSplit= line.split()
		lineNo += 1
		if len(lineSplit) == 0:
			pass
		elif lineSplit[0] == '#':
			pass
		elif lineSplit[0] == 'end':
			try:
				sub = tokens
				tokens = stack.pop()
				if tokens:
					tokens[-1][2] = sub
				level -= 1
			except:
				print( "Tokenizer error at or before line %d" % lineNo )
				print( line )
				dummy = stack.pop()
		elif lineSplit[-1] == ';':
			if lineSplit[0] == '\\':
				key = lineSplit[1]
				tokens.append([key,lineSplit[2:-1],[]])
			else:
				key = lineSplit[0]
				tokens.append([key,lineSplit[1:-1],[]])
		else:
			key = lineSplit[0]
			tokens.append([key,lineSplit[1:],[]])
			stack.append(tokens)
			level += 1
			tokens = []
	file.close()

	if level != 0:
		raise NameError("Tokenizer out of kilter %d" % level)	
	clearScene()
	print( "Parsing" )
	parse(tokens)
	
	for (expr, glbals, lcals) in todo:
		try:
			# print("Doing %s" % expr)
			exec(expr, glbals, lcals)
		except:
			msg = "Failed: "+expr
			print( msg )
			nErrors += 1
			#raise NameError(msg)

	print("Postprocess")
	postProcess()
	print("HideLayers")
	hideLayers()
	time2 = time.clock()
	print("toggle = %x" % toggle)
	msg = "File %s loaded in %g s" % (fileName, time2-time1)
	if nErrors:
		msg += " but there where %d errors. " % (nErrors)
	print(msg)
	return	# loadMhx

#
#	getObject(name, var, glbals, lcals):
#

def getObject(name, var, glbals, lcals):
	try:
		ob = loadedData['Object'][name]
	except:
		if name != "None":
			expr = "%s = loadedData['Object'][name]" % var
			print("Todo ", expr)
			todo.append((expr, glbals, lcals))
		ob = None
	return ob

#
#	parse(tokens):
#

ifResult = False

def parse(tokens):
	global warnedVersion, MHX249, ifResult
	
	for (key, val, sub) in tokens:	
		# print("Parse %s" % key)
		data = None
		if key == 'MHX':
			if int(val[0]) != MAJOR_VERSION and int(val[1]) != MINOR_VERSION and not warnedVersion:
				print("Warning: \nThis file was created with another version of MHX\n")
				warnedVersion = True

		elif key == 'MHX249':
			MHX249 = eval(val[0])
			print("Blender 2.49 compatibility mode is %s\n" % MHX249)

		elif key == 'if':
			try:
				ifResult = eval(val[0])
			except:
				ifResult = False
			if ifResult:
				parse(sub)
				
		elif key == 'elif':
			if not ifResult:
				try:
					ifResult = eval(val[0])
				except:
					ifResult = False
				if ifResult:
					parse(sub)
		
		elif key == 'else':
			if not ifResult:
				parse(sub)
		

		elif MHX249:
			pass

		elif key == 'print':
			msg = concatList(val)
			print(msg)
		elif key == 'warn':
			msg = concatList(val)
			print(msg)
		elif key == 'error':
			msg = concatList(val)
			raise NameError(msg)			
		elif key == "Object":
			parseObject(val, sub)
		elif key == "Mesh":
			data = parseMesh(val, sub)
		elif key == "Curve":
			data = parseCurve(val, sub)
		elif key == "Lattice":
			data = parseLattice(val, sub)
		elif key == "Group":
			data = parseGroup(val, sub)
		elif key == "Armature":
			data = parseArmature(val, sub)
		elif key == "Pose":
			data = parsePose(val, sub)
		elif key == "Action":
			data = parseAction(val, sub)
		elif key == "Material":
			data = parseMaterial(val, sub)
		elif key == "Texture":
			data = parseTexture(val, sub)
		elif key == "Image":
			data = parseImage(val, sub)
		elif key == "Process":
			parseProcess(val, sub)
		elif key == 'AnimationData':
			try:
				ob = loadedData['Object'][val[0]]
			except:
				ob = None
			if ob:
				bpy.context.scene.objects.active = ob
				parseAnimationData(ob, sub)
		elif key == 'ShapeKeys':
			try:
				ob = loadedData['Object'][val[0]]
			except:
				ob = None
			if ob:
				bpy.context.scene.objects.active = ob
				parseShapeKeys(ob, ob.data, val, sub)
		else:
			data = parseDefaultType(key, val, sub)				

		if data and key != 'Mesh':
			print( data )
	return

#
#	parseDefaultType(typ, args, tokens):
#

def parseDefaultType(typ, args, tokens):
	global todo

	name = args[0]
	data = None
	expr = "bpy.data.%s.new('%s')" % (Plural[typ], name)
	print(expr)
	data = eval(expr)
	print("  ok", data)

	bpyType = typ.capitalize()
	print(bpyType, name, data)
	loadedData[bpyType][name] = data
	if data == None:
		return None

	for (key, val, sub) in tokens:
		#print("%s %s" % (key, val))
		defaultKey(key, val, sub, 'data', [], globals(), locals())
	print("Done ", data)
	return data
	
#
#	concatList(elts)
#

def concatList(elts):
	string = ""
	for elt in elts:
		string += " %s" % elt
	return string

#
#	parseAction(args, tokens):
#	parseFCurve(fcu, args, tokens):
#	parseKeyFramePoint(pt, args, tokens):
#

def parseAction(args, tokens):
	name = args[0]
	if invalid(args[1]):
		return

	ob = bpy.context.object
	bpy.ops.object.mode_set(mode='POSE')
	if ob.animation_data:
		ob.animation_data.action = None
	created = {}
	for (key, val, sub) in tokens:
		if key == 'FCurve':
			prepareActionFCurve(ob, created, val, sub)
		
	act = ob.animation_data.action
	loadedData['Action'][name] = act
	if act == None:
		print("Ignoring action %s" % name)
		return act
	act.name = name
	print("Action", name, act, ob)
	
	for (key, val, sub) in tokens:
		if key == 'FCurve':
			fcu = parseActionFCurve(act, ob, val, sub)
		else:
			defaultKey(key, val, sub, 'act', [], globals(), locals())
	ob.animation_data.action = None
	bpy.ops.object.mode_set(mode='OBJECT')
	return act

def prepareActionFCurve(ob, created, args, tokens):			
	dataPath = args[0]
	index = args[1]
	(expr, channel) = channelFromDataPath(dataPath, index)
	try:
		if channel in created[expr]:
			return
		else:
			created[expr].append(channel)
	except:
		created[expr] = [channel]

	times = []
	for (key, val, sub) in tokens:
		if key == 'kp':
			times.append(int(val[0]))

	try:
		data = eval(expr)
	except:
		print("Ignoring illegal expression: %s" % expr)
		return

	n = 0
	for t in times:
		#bpy.context.scene.current_frame = t
		bpy.ops.anim.change_frame(frame = t)
		try:
			data.keyframe_insert(channel)
			n += 1
		except:
			pass
			#print("failed", data, expr, channel)
	if n != len(times):
		print("Mismatch", n, len(times), expr, channel)
	return

def channelFromDataPath(dataPath, index):
	words = dataPath.split(']')
	if len(words) == 1:
		# location
		expr = "ob"
		channel = dataPath
	elif len(words) == 2:
		# pose.bones["tongue"].location
		expr = "ob.%s]" % (words[0])
		cwords = words[1].split('.')
		channel = cwords[1]
	elif len(words) == 3:
		# pose.bones["brow.R"]["mad"]
		expr = "ob.%s]" % (words[0])
		cwords = words[1].split('"')
		channel = cwords[1]
	# print(expr, channel, index)
	return (expr, channel)

def parseActionFCurve(act, ob, args, tokens):
	dataPath = args[0]
	index = args[1]
	(expr, channel) = channelFromDataPath(dataPath, index)
	index = int(args[1])

	success = False
	for fcu in act.fcurves:
		(expr1, channel1) = channelFromDataPath(fcu.data_path, fcu.array_index)
		if expr1 == expr and channel1 == channel and fcu.array_index == index:
			success = True
			break
	if not success:
		return None

	n = 0
	for (key, val, sub) in tokens:
		if key == 'kp':
			try:
				pt = fcu.keyframe_points[n]
				pt.interpolation = 'LINEAR'
				pt = parseKeyFramePoint(pt, val, sub)
				n += 1
			except:
				pass
				#print(tokens)
				#raise NameError("kp", fcu, n, len(fcu.keyframe_points), val)
		else:
			defaultKey(key, val, sub, 'fcu', [], globals(), locals())
	return fcu

def parseKeyFramePoint(pt, args, tokens):
	pt.co = (float(args[0]), float(args[1]))
	if len(args) > 2:
		pt.handle_left = (float(args[2]), float(args[3]))
		pt.handle_right = (float(args[3]), float(args[5]))
	return pt

#
#	parseAnimationData(rna, tokens):
#	parseDriver(drv, args, tokens):
#	parseDriverVariable(var, args, tokens):
#

def parseAnimationData(rna, tokens):
	if 0 and toggle & T_MHX:
		return
	if rna.animation_data == None:	
		rna.animation_data_create()
	adata = rna.animation_data
	for (key, val, sub) in tokens:
		if key == 'FCurve':
			fcu = parseAnimDataFCurve(adata, rna, val, sub)
		else:
			defaultKey(key, val, sub, 'adata', [], globals(), locals())
	return adata

def parseAnimDataFCurve(adata, rna, args, tokens):
	if invalid(args[2]):
		return
	dataPath = args[0]
	index = int(args[1])
	# print("parseAnimDataFCurve", adata, dataPath, index)
	for (key, val, sub) in tokens:
		if key == 'Driver':
			fcu = parseDriver(adata, dataPath, index, rna, val, sub)
		elif key == 'FModifier':
			parseFModifier(fcu, val, sub)
		else:
			defaultKey(key, val, sub, 'fcu', [], globals(), locals())
	return fcu

"""
		fcurve = con.driver_add("influence", 0)
		driver = fcurve.driver
		driver.type = 'AVERAGE'
"""
def parseDriver(adata, dataPath, index, rna, args, tokens):
	if dataPath[-1] == ']':
		words = dataPath.split(']')
		expr = "rna." + words[0] + ']'
		pwords = words[1].split('"')
		prop = pwords[1]
		# print("prop", expr, prop)
		bone = eval(expr)
		return None
	else:
		words = dataPath.split('.')
		channel = words[-1]
		expr = "rna"
		for n in range(len(words)-1):
			expr += "." + words[n]
		expr += ".driver_add('%s', index)" % channel
	
	# print("expr", rna, expr)
	fcu = eval(expr)
	drv = fcu.driver
	drv.type = args[0]
	for (key, val, sub) in tokens:
		if key == 'DriverVariable':
			var = parseDriverVariable(drv, rna, val, sub)
		else:
			defaultKey(key, val, sub, 'drv', [], globals(), locals())
	return fcu

def parseDriverVariable(drv, rna, args, tokens):
	var = drv.variables.new()
	var.name = args[0]
	var.type = args[1]
	nTarget = 0
	# print("var", var, var.name, var.type)
	for (key, val, sub) in tokens:
		if key == 'Target':
			parseDriverTarget(var, nTarget, rna, val, sub)
			nTarget += 1
		else:
			defaultKey(key, val, sub, 'var', [], globals(), locals())
	return var

def parseFModifier(fcu, args, tokens):
	#fmod = fcu.modifiers.new()
	fmod = fcu.modifiers[0]
	#fmod.type = args[0]
	#print("fmod", fmod, fmod.type)
	for (key, val, sub) in tokens:
		defaultKey(key, val, sub, 'fmod', [], globals(), locals())
	return fmod

"""
		var = driver.variables.new()
		var.name = target_bone
		var.targets[0].id_type = 'OBJECT'
		var.targets[0].id = obj
		var.targets[0].rna_path = driver_path
"""
def parseDriverTarget(var, nTarget, rna, args, tokens):
	targ = var.targets[nTarget]
	# targ.rna_path = args[0]
	# targ.id_type = args[1]
	targ.id = loadedData['Object'][args[0]]
	for (key, val, sub) in tokens:
		defaultKey(key, val, sub, 'targ', [], globals(), locals())
	#print("Targ", targ, targ.id, targ.data_path, targ.id_type, targ.bone_target, targ.use_local_space_transform)
	return targ

	
#
#	parseMaterial(args, ext, tokens):
#	parseMTex(mat, args, tokens):
#	parseTexture(args, tokens):
#

def parseMaterial(args, tokens):
	global todo
	name = args[0]
	#print("Parse material "+name)
	mat = bpy.data.materials.new(name)
	if mat == None:
		return None
	loadedData['Material'][name] = mat
	#print("Material %s %s %s" % (mat, name, loadedData['Material'][name]))
	for (key, val, sub) in tokens:
		if key == 'MTex':
			parseMTex(mat, val, sub)
		elif key == 'Ramp':
			parseRamp(mat, val, sub)
		elif key == 'SSS':
			parseSSS(mat, val, sub)
		elif key == 'Strand':
			parseStrand(mat, val, sub)
		else:
			exclude = ['specular_intensity', 'tangent_shading']
			defaultKey(key, val, sub, 'mat', [], globals(), locals())
	#print("Done ", mat)
	
	return mat

def parseMTex(mat, args, tokens):
	global todo
	index = int(args[0])
	texname = args[1]
	texco = args[2]
	mapto = args[3]

	mat.add_texture(texture = loadedData['Texture'][texname], texture_coordinates = texco, map_to = mapto)
	mtex = mat.texture_slots[index]
	#mat.use_textures[index] = Bool(use)

	for (key, val, sub) in tokens:
		defaultKey(key, val, sub, "mtex", [], globals(), locals())

	return mtex

def parseTexture(args, tokens):
	global todo
	if verbosity > 2:
		print( "Parsing texture %s" % args )
	name = args[0]
	tex = bpy.data.textures.new(name)
	typ = args[1]
	tex.type = typ
	tex = tex.recast_type()
	loadedData['Texture'][name] = tex
	
	for (key, val, sub) in tokens:
		if key == 'Image':
			try:
				imgName = val[0]
				img = loadedData['Image'][imgName]
				tex.image = img
			except:
				msg = "Unable to load image '%s'" % val[0]
		elif key == 'Ramp':
			parseRamp(tex, val, sub)
		else:
			defaultKey(key, val,  sub, "tex", ['use_nodes', 'use_textures', 'contrast'], globals(), locals())

	return tex

def parseRamp(data, args, tokens):
	nvar = "data.%s" % args[0]
	use = "data.use_%s = True" % args[0]
	exec(use)
	ramp = eval(nvar)
	elts = ramp.elements
	n = 0
	for (key, val, sub) in tokens:
		# print("Ramp", key, val)
		if key == 'Element':
			elts[n].color = eval(val[0])
			elts[n].position = eval(val[1])
			n += 1
		else:
			defaultKey(key, val,  sub, "tex", ['use_nodes', 'use_textures', 'contrast'], globals(), locals())
	
def parseSSS(mat, args, tokens):
	sss = mat.subsurface_scattering
	for (key, val, sub) in tokens:
		defaultKey(key, val, sub, "sss", [], globals(), locals())

def parseStrand(mat, args, tokens):
	strand = mat.strand
	for (key, val, sub) in tokens:
		defaultKey(key, val, sub, "strand", [], globals(), locals())

#
#	doLoadImage(filepath):
#	loadImage(filepath):
#	parseImage(args, tokens):
#

def doLoadImage(filepath):		
	path1 = os.path.expanduser(filepath)
	file1 = os.path.realpath(path1)
	if os.path.isfile(file1):
		print( "Found file "+file1 )
		try:
			img = bpy.data.images.load(file1)
			return img
		except:
			print( "Cannot read image" )
			return None
	else:
		print( "No file "+file1 )
		return None


def loadImage(filepath):
	global TexDir, warnedTextureDir, loadedData

	texDir = os.path.expanduser(TexDir)
	path1 = os.path.expanduser(filepath)
	file1 = os.path.realpath(path1)
	(path, filename) = os.path.split(file1)
	(name, ext) = os.path.splitext(filename)
	print( "Loading ", filepath, " = ", filename )

	# img = doLoadImage(texDir+"/"+name+".png")
	# if img:
	#	return img

	img = doLoadImage(texDir+"/"+filename)
	if img:
		return img

	# img = doLoadImage(path+"/"+name+".png")
	# if img:
	#	return img

	img = doLoadImage(path+"/"+filename)
	if img:
		return img

	if warnedTextureDir:
		return None
	warnedTextureDir = True
	return None
	TexDir = Draw.PupStrInput("TexDir? ", path, 100)

	texDir = os.path.expanduser(TexDir)
	img =  doLoadImage(texDir+"/"+name+".png")
	if img:
		return img

	img = doLoadImage(TexDir+"/"+filename)
	return img
	
def parseImage(args, tokens):
	global todo
	imgName = args[0]
	img = None
	for (key, val, sub) in tokens:
		if key == 'Filename':
			filename = val[0]
			for n in range(1,len(val)):
				filename += " " + val[n]
			img = loadImage(filename)
			if img == None:
				return None
			img.name = imgName
		else:
			defaultKey(key, val,  sub, "img", ['depth', 'is_dirty', 'has_data', 'size', 'type'], globals(), locals())
	print ("Image %s" % img )
	loadedData['Image'][imgName] = img
	return img

#
#	parseObject(args, tokens):
#	createObject(type, name, data, datName):
#	createObjectAndData(args, typ):
#
	
def parseObject(args, tokens):
	if verbosity > 2:
		print( "Parsing object %s" % args )
	name = args[0]
	typ = args[1]
	datName = args[2]
	try:
		data = loadedData[typ.capitalize()][datName]	
	except:
		data = None

	if data == None and typ != 'EMPTY':
		print("Failed to find data: %s %s %s" % (name, typ, datName))
		return

	try:
		ob = loadedData['Object'][name]
		bpy.context.scene.objects.active = ob
		#print("Found data")
	except:
		ob = createObject(typ, name, data, datName)
	if bpy.context.object != ob:
		print("Context", ob, bpy.context.object, bpy.context.scene.objects.active)
		# ob = foo 

	for (key, val, sub) in tokens:
		if key == 'Modifier':
			parseModifier(ob, val, sub)
		elif key == 'Constraint':
			parseConstraint(ob.constraints, val, sub)
		elif key == 'AnimationData':
			if eval(val[0]):
				parseAnimationData(ob, sub)
		elif key == 'ParticleSystem':
			parseParticleSystem(ob, val, sub)
		else:
			defaultKey(key, val, sub, "ob", ['type', 'data'], globals(), locals())

	# Needed for updating layers
	bpy.ops.object.mode_set(mode='EDIT')
	bpy.ops.object.mode_set(mode='OBJECT')
	return

def createObject(typ, name, data, datName):
	#print( "Creating object %s %s %s" % (typ, name, data) )	
	ob = bpy.data.objects.new(name, data)
	loadedData[typ][datName] = data
	loadedData['Object'][name] = ob
	return ob
	
def linkObject(ob, data):
	#print("Data", data, ob.data)
	if data and ob.data == None:
		ob.data = data
	scn = bpy.context.scene
	scn.objects.link(ob)
	scn.objects.active = ob
	#print("Linked object", ob)
	#print("Scene", scn)
	#print("Active", scn.objects.active)
	#print("Context", bpy.context.object)
	return ob

def createObjectAndData(args, typ):
	datName = args[0]
	obName = args[1]
	bpy.ops.object.add(type=typ.upper())
	ob = bpy.context.object
	ob.name = obName
	ob.data.name = datName
	loadedData[typ][datName] = ob.data
	loadedData['Object'][obName] = ob
	return ob.data


#
#	parseModifier(ob, args, tokens):
#