# ##### 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.
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# ##### END GPL LICENSE BLOCK #####
bl_info= {
"name": "Import LightWave Objects",
"author": "Ken Nign (Ken9)",
"version": (1, 2),
"blender": (2, 57, 0),
"location": "File > Import > LightWave Object (.lwo)",
"description": "Imports a LWO file including any UV, Morph and Color maps. "
"Can convert Skelegons to an Armature.",
"warning": "",
"wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
"Scripts/Import-Export/LightWave_Object",
"category": "Import-Export",
}
# Copyright (c) Ken Nign 2010
# ken@virginpi.com
#
# Version 1.3 - Aug 11, 2011
#
# Loads a LightWave .lwo object file, including the vertex maps such as
# UV, Morph, Color and Weight maps.
#
# Will optionally create an Armature from an embedded Skelegon rig.
#
# Point orders are maintained so that .mdds can exchanged with other
# 3D programs.
#
#
# Notes:
# NGons, polygons with more than 4 points are supported, but are
# added (as triangles) after the vertex maps have been applied. Thus they
# won't contain all the vertex data that the original ngon had.
#
# Blender is limited to only 8 UV Texture and 8 Vertex Color maps,
# thus only the first 8 of each can be imported.
#
# History:
#
# 1.3 Fixed CC Edge Weight loading.
#
# 1.2 Added Absolute Morph and CC Edge Weight support.
# Made edge creation safer.
# 1.0 First Release
import os
import struct
import chunk
import bpy
import mathutils
from mathutils.geometry import tessellate_polygon
class _obj_layer(object):
__slots__ = (
"name",
"index",
"parent_index",
"pivot",
"pols",
"bones",
"bone_names",
"bone_rolls",
"pnts",
"wmaps",
"colmaps",
"uvmaps",
"morphs",
"edge_weights",
"surf_tags",
"has_subds",
)
def __init__(self):
self.name= ""
self.index= -1
self.parent_index= -1
self.pivot= [0, 0, 0]
self.pols= []
self.bones= []
self.bone_names= {}
self.bone_rolls= {}
self.pnts= []
self.wmaps= {}
self.colmaps= {}
self.uvmaps= {}
self.morphs= {}
self.edge_weights= {}
self.surf_tags= {}
self.has_subds= False
class _obj_surf(object):
__slots__ = (
"bl_mat",
"name",
"source_name",
"colr",
"diff",
"lumi",
"spec",
"refl",
"rblr",
"tran",
"rind",
"tblr",
"trnl",
"glos",
"shrp",
"smooth",
)
def __init__(self):
self.bl_mat= None
self.name= "Default"
self.source_name= ""
self.colr= [1.0, 1.0, 1.0]
self.diff= 1.0 # Diffuse
self.lumi= 0.0 # Luminosity
self.spec= 0.0 # Specular
self.refl= 0.0 # Reflectivity
self.rblr= 0.0 # Reflection Bluring
self.tran= 0.0 # Transparency (the opposite of Blender's Alpha value)
self.rind= 1.0 # RT Transparency IOR
self.tblr= 0.0 # Refraction Bluring
self.trnl= 0.0 # Translucency
self.glos= 0.4 # Glossiness
self.shrp= 0.0 # Diffuse Sharpness
self.smooth= False # Surface Smoothing
def load_lwo(filename,
context,
ADD_SUBD_MOD=True,
LOAD_HIDDEN=False,
SKEL_TO_ARM=True,
USE_EXISTING_MATERIALS=False):
"""Read the LWO file, hand off to version specific function."""
name, ext= os.path.splitext(os.path.basename(filename))
file= open(filename, 'rb')
try:
header, chunk_size, chunk_name = struct.unpack(">4s1L4s", file.read(12))
except:
print("Error parsing file header!")
file.close()
return
layers= []
surfs= {}
tags= []
# Gather the object data using the version specific handler.
if chunk_name == b'LWO2':
read_lwo2(file, filename, layers, surfs, tags, ADD_SUBD_MOD, LOAD_HIDDEN, SKEL_TO_ARM)
elif chunk_name == b'LWOB' or chunk_name == b'LWLO':
# LWOB and LWLO are the old format, LWLO is a layered object.
read_lwob(file, filename, layers, surfs, tags, ADD_SUBD_MOD)
else:
print("Not a supported file type!")
file.close()
return
file.close()
# With the data gathered, build the object(s).
build_objects(layers, surfs, tags, name, ADD_SUBD_MOD, SKEL_TO_ARM, USE_EXISTING_MATERIALS)
layers= None
surfs.clear()
tags= None
def read_lwo2(file, filename, layers, surfs, tags, add_subd_mod, load_hidden, skel_to_arm):
"""Read version 2 file, LW 6+."""
handle_layer= True
last_pols_count= 0
just_read_bones= False
print("Importing LWO: " + filename + "\nLWO v2 Format")
while True:
try:
rootchunk = chunk.Chunk(file)
except EOFError:
break
if rootchunk.chunkname == b'TAGS':
read_tags(rootchunk.read(), tags)
elif rootchunk.chunkname == b'LAYR':
handle_layer= read_layr(rootchunk.read(), layers, load_hidden)
elif rootchunk.chunkname == b'PNTS' and handle_layer:
read_pnts(rootchunk.read(), layers)
elif rootchunk.chunkname == b'VMAP' and handle_layer:
vmap_type = rootchunk.read(4)
if vmap_type == b'WGHT':
read_weightmap(rootchunk.read(), layers)
elif vmap_type == b'MORF':
read_morph(rootchunk.read(), layers, False)
elif vmap_type == b'SPOT':
read_morph(rootchunk.read(), layers, True)
elif vmap_type == b'TXUV':
read_uvmap(rootchunk.read(), layers)
elif vmap_type == b'RGB ' or vmap_type == b'RGBA':
read_colmap(rootchunk.read(), layers)
else:
rootchunk.skip()
elif rootchunk.chunkname == b'VMAD' and handle_layer:
vmad_type= rootchunk.read(4)
if vmad_type == b'TXUV':
read_uv_vmad(rootchunk.read(), layers, last_pols_count)
elif vmad_type == b'RGB ' or vmad_type == b'RGBA':
read_color_vmad(rootchunk.read(), layers, last_pols_count)
elif vmad_type == b'WGHT':
# We only read the Edge Weight map if it's there.
read_weight_vmad(rootchunk.read(), layers)
else:
rootchunk.skip()
elif rootchunk.chunkname == b'POLS' and handle_layer:
face_type = rootchunk.read(4)
just_read_bones= False
# PTCH is LW's Subpatches, SUBD is CatmullClark.
if (face_type == b'FACE' or face_type == b'PTCH' or
face_type == b'SUBD') and handle_layer:
last_pols_count= read_pols(rootchunk.read(), layers)
if face_type != b'FACE':
layers[-1].has_subds= True
elif face_type == b'BONE' and handle_layer:
read_bones(rootchunk.read(), layers)
just_read_bones= True
else:
rootchunk.skip()
elif rootchunk.chunkname == b'PTAG' and handle_layer:
tag_type,= struct.unpack("4s", rootchunk.read(4))
if tag_type == b'SURF' and not just_read_bones:
# Ignore the surface data if we just read a bones chunk.
read_surf_tags(rootchunk.read(), layers, last_pols_count)
elif skel_to_arm:
if tag_type == b'BNUP':
read_bone_tags(rootchunk.read(), layers, tags, 'BNUP')
elif tag_type == b'BONE':
read_bone_tags(rootchunk.read(), layers, tags, 'BONE')
else:
rootchunk.skip()
else:
rootchunk.skip()
elif rootchunk.chunkname == b'SURF':
read_surf(rootchunk.read(), surfs)
else:
#if handle_layer:
#print("Skipping Chunk:", rootchunk.chunkname)
rootchunk.skip()
def read_lwob(file, filename, layers, surfs, tags, add_subd_mod):
"""Read version 1 file, LW < 6."""
last_pols_count= 0
print("Importing LWO: " + filename + "\nLWO v1 Format")
while True:
try:
rootchunk = chunk.Chunk(file)
except EOFError:
break
if rootchunk.chunkname == b'SRFS':
read_tags(rootchunk.read(), tags)
elif rootchunk.chunkname == b'LAYR':
read_layr_5(rootchunk.read(), layers)
elif rootchunk.chunkname == b'PNTS':
if len(layers) == 0:
# LWOB files have no LAYR chunk to set this up.
nlayer= _obj_layer()
nlayer.name= "Layer 1"
layers.append(nlayer)
read_pnts(rootchunk.read(), layers)
elif rootchunk.chunkname == b'POLS':
last_pols_count= read_pols_5(rootchunk.read(), layers)
elif rootchunk.chunkname == b'PCHS':
last_pols_count= read_pols_5(rootchunk.read(), layers)
layers[-1].has_subds= True
elif rootchunk.chunkname == b'PTAG':
tag_type,= struct.unpack("4s", rootchunk.read(4))
if tag_type == b'SURF':
read_surf_tags_5(rootchunk.read(), layers, last_pols_count)
else:
rootchunk.skip()
elif rootchunk.chunkname == b'SURF':
read_surf_5(rootchunk.read(), surfs)
else:
# For Debugging \/.
#if handle_layer:
#print("Skipping Chunk: ", rootchunk.chunkname)
rootchunk.skip()
def read_lwostring(raw_name):
"""Parse a zero-padded string."""
i = raw_name.find(b'\0')
name_len = i + 1
if name_len % 2 == 1: # Test for oddness.
name_len += 1
if i > 0:
# Some plugins put non-text strings in the tags chunk.
name = raw_name[0:i].decode("utf-8", "ignore")
else:
name = ""
return name, name_len
def read_vx(pointdata):
"""Read a variable-length index."""
if pointdata[0] != 255:
index= pointdata[0]*256 + pointdata[1]
size= 2
else:
index= pointdata[1]*65536 + pointdata[2]*256 + pointdata[3]
size= 4
return index, size
def read_tags(tag_bytes, object_tags):
"""Read the object's Tags chunk."""
offset= 0
chunk_len= len(tag_bytes)
while offset < chunk_len:
tag, tag_len= read_lwostring(tag_bytes[offset:])
offset+= tag_len
object_tags.append(tag)
def read_layr(layr_bytes, object_layers, load_hidden):
"""Read the object's layer data."""
new_layr= _obj_layer()
new_layr.index, flags= struct.unpack(">HH", layr_bytes[0:4])
if flags > 0 and not load_hidden:
return False
print("Reading Object Layer")
offset= 4
pivot= struct.unpack(">fff", layr_bytes[offset:offset+12])
# Swap Y and Z to match Blender's pitch.
new_layr.pivot= [pivot[0], pivot[2], pivot[1]]
offset+= 12
layr_name, name_len = read_lwostring(layr_bytes[offset:])
offset+= name_len
if layr_name:
new_layr.name= layr_name
else:
new_layr.name= "Layer %d" % (new_layr.index + 1)
if len(layr_bytes) == offset+2:
new_layr.parent_index,= struct.unpack(">h", layr_bytes[offset:offset+2])
object_layers.append(new_layr)
return True
def read_layr_5(layr_bytes, object_layers):
"""Read the object's layer data."""
# XXX: Need to check what these two exactly mean for a LWOB/LWLO file.
new_layr= _obj_layer()
new_layr.index, flags= struct.unpack(">HH", layr_bytes[0:4])
print("Reading Object Layer")
offset= 4
layr_name, name_len = read_lwostring(layr_bytes[offset:])
offset+= name_len
if name_len > 2 and layr_name != 'noname':
new_layr.name= layr_name
else:
new_layr.name= "Layer %d" % new_layr.index
object_layers.append(new_layr)
def read_pnts(pnt_bytes, object_layers):
"""Read the layer's points."""
print("\tReading Layer ("+object_layers[-1].name+") Points")
offset= 0
chunk_len= len(pnt_bytes)
while offset < chunk_len:
pnts= struct.unpack(">fff", pnt_bytes[offset:offset+12])
offset+= 12
# Re-order the points so that the mesh has the right pitch,
# the pivot already has the correct order.
pnts= [pnts[0] - object_layers[-1].pivot[0],\
pnts[2] - object_layers[-1].pivot[1],\
pnts[1] - object_layers[-1].pivot[2]]
object_layers[-1].pnts.append(pnts)
def read_weightmap(weight_bytes, object_layers):
"""Read a weight map's values."""
chunk_len= len(weight_bytes)
offset= 2
name, name_len= read_lwostring(weight_bytes[offset:])
offset+= name_len
weights= []
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(weight_bytes[offset:offset+4])
offset+= pnt_id_len
value,= struct.unpack(">f", weight_bytes[offset:offset+4])
offset+= 4
weights.append([pnt_id, value])
object_layers[-1].wmaps[name]= weights
def read_morph(morph_bytes, object_layers, is_abs):
"""Read an endomorph's relative or absolute displacement values."""
chunk_len= len(morph_bytes)
offset= 2
name, name_len= read_lwostring(morph_bytes[offset:])
offset+= name_len
deltas= []
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(morph_bytes[offset:offset+4])
offset+= pnt_id_len
pos= struct.unpack(">fff", morph_bytes[offset:offset+12])
offset+= 12
pnt= object_layers[-1].pnts[pnt_id]
if is_abs:
deltas.append([pnt_id, pos[0], pos[2], pos[1]])
else:
# Swap the Y and Z to match Blender's pitch.
deltas.append([pnt_id, pnt[0]+pos[0], pnt[1]+pos[2], pnt[2]+pos[1]])
object_layers[-1].morphs[name]= deltas
def read_colmap(col_bytes, object_layers):
"""Read the RGB or RGBA color map."""
chunk_len= len(col_bytes)
dia,= struct.unpack(">H", col_bytes[0:2])
offset= 2
name, name_len= read_lwostring(col_bytes[offset:])
offset+= name_len
colors= {}
if dia == 3:
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(col_bytes[offset:offset+4])
offset+= pnt_id_len
col= struct.unpack(">fff", col_bytes[offset:offset+12])
offset+= 12
colors[pnt_id]= (col[0], col[1], col[2])
elif dia == 4:
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(col_bytes[offset:offset+4])
offset+= pnt_id_len
col= struct.unpack(">ffff", col_bytes[offset:offset+16])
offset+= 16
colors[pnt_id]= (col[0], col[1], col[2])
if name in object_layers[-1].colmaps:
if "PointMap" in object_layers[-1].colmaps[name]:
object_layers[-1].colmaps[name]["PointMap"].update(colors)
else:
object_layers[-1].colmaps[name]["PointMap"]= colors
else:
object_layers[-1].colmaps[name]= dict(PointMap=colors)
def read_color_vmad(col_bytes, object_layers, last_pols_count):
"""Read the Discontinous (per-polygon) RGB values."""
chunk_len= len(col_bytes)
dia,= struct.unpack(">H", col_bytes[0:2])
offset= 2
name, name_len= read_lwostring(col_bytes[offset:])
offset+= name_len
colors= {}
abs_pid= len(object_layers[-1].pols) - last_pols_count
if dia == 3:
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(col_bytes[offset:offset+4])
offset+= pnt_id_len
pol_id, pol_id_len= read_vx(col_bytes[offset:offset+4])
offset+= pol_id_len
# The PolyID in a VMAD can be relative, this offsets it.
pol_id+= abs_pid
col= struct.unpack(">fff", col_bytes[offset:offset+12])
offset+= 12
if pol_id in colors:
colors[pol_id][pnt_id]= (col[0], col[1], col[2])
else:
colors[pol_id]= dict({pnt_id: (col[0], col[1], col[2])})
elif dia == 4:
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(col_bytes[offset:offset+4])
offset+= pnt_id_len
pol_id, pol_id_len= read_vx(col_bytes[offset:offset+4])
offset+= pol_id_len
pol_id+= abs_pid
col= struct.unpack(">ffff", col_bytes[offset:offset+16])
offset+= 16
if pol_id in colors:
colors[pol_id][pnt_id]= (col[0], col[1], col[2])
else:
colors[pol_id]= dict({pnt_id: (col[0], col[1], col[2])})
if name in object_layers[-1].colmaps:
if "FaceMap" in object_layers[-1].colmaps[name]:
object_layers[-1].colmaps[name]["FaceMap"].update(colors)
else:
object_layers[-1].colmaps[name]["FaceMap"]= colors
else:
object_layers[-1].colmaps[name]= dict(FaceMap=colors)
def read_uvmap(uv_bytes, object_layers):
"""Read the simple UV coord values."""
chunk_len= len(uv_bytes)
offset= 2
name, name_len= read_lwostring(uv_bytes[offset:])
offset+= name_len
uv_coords= {}
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(uv_bytes[offset:offset+4])
offset+= pnt_id_len
pos= struct.unpack(">ff", uv_bytes[offset:offset+8])
offset+= 8
uv_coords[pnt_id]= (pos[0], pos[1])
if name in object_layers[-1].uvmaps:
if "PointMap" in object_layers[-1].uvmaps[name]:
object_layers[-1].uvmaps[name]["PointMap"].update(uv_coords)
else:
object_layers[-1].uvmaps[name]["PointMap"]= uv_coords
else:
object_layers[-1].uvmaps[name]= dict(PointMap=uv_coords)
def read_uv_vmad(uv_bytes, object_layers, last_pols_count):
"""Read the Discontinous (per-polygon) uv values."""
chunk_len= len(uv_bytes)
offset= 2
name, name_len= read_lwostring(uv_bytes[offset:])
offset+= name_len
uv_coords= {}
abs_pid= len(object_layers[-1].pols) - last_pols_count
while offset < chunk_len:
pnt_id, pnt_id_len= read_vx(uv_bytes[offset:offset+4])
offset+= pnt_id_len
pol_id, pol_id_len= read_vx(uv_bytes[offset:offset+4])
offset+= pol_id_len
pol_id+= abs_pid
pos= struct.unpack(">ff", uv_bytes[offset:offset+8])
offset+= 8
if pol_id in uv_coords:
uv_coords[pol_id][pnt_id]= (pos[0], pos[1])
else:
uv_coords[pol_id]= dict({pnt_id: (pos[0], pos[1])})
if name in object_layers[-1].uvmaps:
if "FaceMap" in object_layers[-1].uvmaps[name]:
object_layers[-1].uvmaps[name]["FaceMap"].update(uv_coords)
else:
object_layers[-1].uvmaps[name]["FaceMap"]= uv_coords
else:
object_layers[-1].uvmaps[name]= dict(FaceMap=uv_coords)
def read_weight_vmad(ew_bytes, object_layers):
"""Read the VMAD Weight values."""
chunk_len= len(ew_bytes)
offset= 2
name, name_len= read_lwostring(ew_bytes[offset:])
if name != "Edge Weight":
return # We just want the Catmull-Clark edge weights
offset+= name_len
# Some info: LW stores a face's points in a clock-wize order (with the
# normal pointing at you). This gives edges a 'direction' which is used
# when it comes to storing CC edge weight values. The weight is given
# to the point preceding the edge that the weight belongs to.
while offset < chunk_len:
pnt_id, pnt_id_len = read_vx(ew_bytes[offset:offset+4])
offset+= pnt_id_len
pol_id, pol_id_len= read_vx(ew_bytes[offset:offset+4])
offset+= pol_id_len
weight,= struct.unpack(">f", ew_bytes[offset:offset+4])
offset+= 4
face_pnts= object_layers[-1].pols[pol_id]
try:
# Find the point's location in the polygon's point list
first_idx= face_pnts.index(pnt_id)
except:
continue
# Then get the next point in the list, or wrap around to the first
if first_idx == len(face_pnts) - 1:
second_pnt= face_pnts[0]
else:
second_pnt= face_pnts[first_idx + 1]
object_layers[-1].edge_weights["{0} {1}".format(second_pnt, pnt_id)]= weight
def read_pols(pol_bytes, object_layers):
"""Read the layer's polygons, each one is just a list of point indexes."""
print("\tReading Layer ("+object_layers[-1].name+") Polygons")
offset= 0
pols_count = len(pol_bytes)
old_pols_count= len(object_layers[-1].pols)
while offset < pols_count:
pnts_count,= struct.unpack(">H", pol_bytes[offset:offset+2])
offset+= 2
all_face_pnts= []
for j in range(pnts_count):
face_pnt, data_size= read_vx(pol_bytes[offset:offset+4])
offset+= data_size
all_face_pnts.append(face_pnt)
object_layers[-1].pols.append(all_face_pnts)
return len(object_layers[-1].pols) - old_pols_count
def read_pols_5(pol_bytes, object_layers):
"""
Read the polygons, each one is just a list of point indexes.
But it also includes the surface index.
"""
print("\tReading Layer ("+object_layers[-1].name+") Polygons")
offset= 0
chunk_len= len(pol_bytes)
old_pols_count= len(object_layers[-1].pols)
poly= 0
while offset < chunk_len:
pnts_count,= struct.unpack(">H", pol_bytes[offset:offset+2])
offset+= 2
all_face_pnts= []
for j in range(pnts_count):
face_pnt,= struct.unpack(">H", pol_bytes[offset:offset+2])
offset+= 2
all_face_pnts.append(face_pnt)
object_layers[-1].pols.append(all_face_pnts)
sid,= struct.unpack(">h", pol_bytes[offset:offset+2])
offset+= 2
sid= abs(sid) - 1
if sid not in object_layers[-1].surf_tags:
object_layers[-1].surf_tags[sid]= []
object_layers[-1].surf_tags[sid].append(poly)
poly+= 1
return len(object_layers[-1].pols) - old_pols_count
def read_bones(bone_bytes, object_layers):
"""Read the layer's skelegons."""
print("\tReading Layer ("+object_layers[-1].name+") Bones")
offset= 0
bones_count = len(bone_bytes)
while offset < bones_count:
pnts_count,= struct.unpack(">H", bone_bytes[offset:offset+2])
offset+= 2
all_bone_pnts= []
for j in range(pnts_count):
bone_pnt, data_size= read_vx(bone_bytes[offset:offset+4])
offset+= data_size
all_bone_pnts.append(bone_pnt)
object_layers[-1].bones.append(all_bone_pnts)
def read_bone_tags(tag_bytes, object_layers, object_tags, type):
"""Read the bone name or roll tags."""
offset= 0
chunk_len= len(tag_bytes)
if type == 'BONE':
bone_dict= object_layers[-1].bone_names
elif type == 'BNUP':
bone_dict= object_layers[-1].bone_rolls
else:
return
while offset < chunk_len:
pid, pid_len= read_vx(tag_bytes[offset:offset+4])
offset+= pid_len
tid,= struct.unpack(">H", tag_bytes[offset:offset+2])
offset+= 2
bone_dict[pid]= object_tags[tid]
def read_surf_tags(tag_bytes, object_layers, last_pols_count):
"""Read the list of PolyIDs and tag indexes."""
print("\tReading Layer ("+object_layers[-1].name+") Surface Assignments")
offset= 0
chunk_len= len(tag_bytes)
# Read in the PolyID/Surface Index pairs.
abs_pid= len(object_layers[-1].pols) - last_pols_count
while offset < chunk_len:
pid, pid_len= read_vx(tag_bytes[offset:offset+4])
offset+= pid_len
sid,= struct.unpack(">H", tag_bytes[offset:offset+2])
offset+=2
if sid not in object_layers[-1].surf_tags:
object_layers[-1].surf_tags[sid]= []
object_layers[-1].surf_tags[sid].append(pid + abs_pid)
def read_surf(surf_bytes, object_surfs):
"""Read the object's surface data."""
if len(object_surfs) == 0:
print("Reading Object Surfaces")
surf= _obj_surf()
name, name_len= read_lwostring(surf_bytes)
if len(name) != 0:
surf.name = name
# We have to read this, but we won't use it...yet.
s_name, s_name_len= read_lwostring(surf_bytes[name_len:])
offset= name_len+s_name_len
block_size= len(surf_bytes)
while offset < block_size:
subchunk_name,= struct.unpack("4s", surf_bytes[offset:offset+4])
offset+= 4
subchunk_len,= struct.unpack(">H", surf_bytes[offset:offset+2])
offset+= 2
# Now test which subchunk it is.
if subchunk_name == b'COLR':
surf.colr= struct.unpack(">fff", surf_bytes[offset:offset+12])
# Don't bother with any envelopes for now.
elif subchunk_name == b'DIFF':
surf.diff,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'LUMI':
surf.lumi,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'SPEC':
surf.spec,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'REFL':
surf.refl,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'RBLR':
surf.rblr,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'TRAN':
surf.tran,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'RIND':
surf.rind,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'TBLR':
surf.tblr,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'TRNL':
surf.trnl,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'GLOS':
surf.glos,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'SHRP':
surf.shrp,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'SMAN':
s_angle,= struct.unpack(">f", surf_bytes[offset:offset+4])
if s_angle > 0.0:
surf.smooth = True
offset+= subchunk_len
object_surfs[surf.name]= surf
def read_surf_5(surf_bytes, object_surfs):
"""Read the object's surface data."""
if len(object_surfs) == 0:
print("Reading Object Surfaces")
surf= _obj_surf()
name, name_len= read_lwostring(surf_bytes)
if len(name) != 0:
surf.name = name
offset= name_len
chunk_len= len(surf_bytes)
while offset < chunk_len:
subchunk_name,= struct.unpack("4s", surf_bytes[offset:offset+4])
offset+= 4
subchunk_len,= struct.unpack(">H", surf_bytes[offset:offset+2])
offset+= 2
# Now test which subchunk it is.
if subchunk_name == b'COLR':
color= struct.unpack(">BBBB", surf_bytes[offset:offset+4])
surf.colr= [color[0] / 255.0, color[1] / 255.0, color[2] / 255.0]
elif subchunk_name == b'DIFF':
surf.diff,= struct.unpack(">h", surf_bytes[offset:offset+2])
surf.diff/= 256.0 # Yes, 256 not 255.
elif subchunk_name == b'LUMI':
surf.lumi,= struct.unpack(">h", surf_bytes[offset:offset+2])
surf.lumi/= 256.0
elif subchunk_name == b'SPEC':
surf.spec,= struct.unpack(">h", surf_bytes[offset:offset+2])
surf.spec/= 256.0
elif subchunk_name == b'REFL':
surf.refl,= struct.unpack(">h", surf_bytes[offset:offset+2])
surf.refl/= 256.0
elif subchunk_name == b'TRAN':
surf.tran,= struct.unpack(">h", surf_bytes[offset:offset+2])
surf.tran/= 256.0
elif subchunk_name == b'RIND':
surf.rind,= struct.unpack(">f", surf_bytes[offset:offset+4])
elif subchunk_name == b'GLOS':
surf.glos,= struct.unpack(">h", surf_bytes[offset:offset+2])
elif subchunk_name == b'SMAN':
s_angle,= struct.unpack(">f", surf_bytes[offset:offset+4])
if s_angle > 0.0:
surf.smooth = True
offset+= subchunk_len
object_surfs[surf.name]= surf
def create_mappack(data, map_name, map_type):
"""Match the map data to faces."""
pack= {}
def color_pointmap(map):
for fi in range(len(data.pols)):
if fi not in pack:
pack[fi]= []
for pnt in data.pols[fi]:
if pnt in map:
pack[fi].append(map[pnt])
else:
pack[fi].append((1.0, 1.0, 1.0))
def color_facemap(map):
for fi in range(len(data.pols)):
if fi not in pack:
pack[fi]= []
for p in data.pols[fi]:
pack[fi].append((1.0, 1.0, 1.0))
if fi in map:
for po in range(len(data.pols[fi])):
if data.pols[fi][po] in map[fi]:
pack[fi].insert(po, map[fi][data.pols[fi][po]])
del pack[fi][po+1]
def uv_pointmap(map):
for fi in range(len(data.pols)):
if fi not in pack:
pack[fi]= []
for p in data.pols[fi]:
pack[fi].append((-0.1,-0.1))
for po in range(len(data.pols[fi])):
pnt_id= data.pols[fi][po]
if pnt_id in map:
pack[fi].insert(po, map[pnt_id])
del pack[fi][po+1]
def uv_facemap(map):
for fi in range(len(data.pols)):
if fi not in pack:
pack[fi]= []
for p in data.pols[fi]:
pack[fi].append((-0.1,-0.1))
if fi in map:
for po in range(len(data.pols[fi])):
pnt_id= data.pols[fi][po]
if pnt_id in map[fi]:
pack[fi].insert(po, map[fi][pnt_id])
del pack[fi][po+1]
if map_type == "COLOR":
# Look at the first map, is it a point or face map
if "PointMap" in data.colmaps[map_name]:
color_pointmap(data.colmaps[map_name]["PointMap"])
if "FaceMap" in data.colmaps[map_name]:
color_facemap(data.colmaps[map_name]["FaceMap"])
elif map_type == "UV":
if "PointMap" in data.uvmaps[map_name]:
uv_pointmap(data.uvmaps[map_name]["PointMap"])
if "FaceMap" in data.uvmaps[map_name]:
uv_facemap(data.uvmaps[map_name]["FaceMap"])
return pack
def build_armature(layer_data, bones):
"""Build an armature from the skelegon data in the mesh."""
print("Building Armature")
# New Armatures include a default bone, remove it.
bones.remove(bones[0])
# Now start adding the bones at the point locations.
prev_bone= None
for skb_idx in range(len(layer_data.bones)):
if skb_idx in layer_data.bone_names:
nb= bones.new(layer_data.bone_names[skb_idx])
else:
nb= bones.new("Bone")
nb.head= layer_data.pnts[layer_data.bones[skb_idx][0]]
nb.tail= layer_data.pnts[layer_data.bones[skb_idx][1]]
if skb_idx in layer_data.bone_rolls:
xyz= layer_data.bone_rolls[skb_idx].split(' ')
vec= mathutils.Vector((float(xyz[0]), float(xyz[1]), float(xyz[2])))
quat= vec.to_track_quat('Y', 'Z')
nb.roll= max(quat.to_euler('YZX'))
if nb.roll == 0.0:
nb.roll= min(quat.to_euler('YZX')) * -1
# YZX order seems to produce the correct roll value.
else:
nb.roll= 0.0
if prev_bone != None:
if nb.head == prev_bone.tail:
nb.parent= prev_bone
nb.use_connect= True
prev_bone= nb
def build_objects(object_layers, object_surfs, object_tags, object_name, add_subd_mod, skel_to_arm, use_existing_materials):
"""Using the gathered data, create the objects."""
ob_dict= {} # Used for the parenting setup.
print("Adding %d Materials" % len(object_surfs))
for surf_key in object_surfs:
surf_data= object_surfs[surf_key]
surf_data.bl_mat = bpy.data.materials.get(surf_data.name) if use_existing_materials else None
if surf_data.bl_mat is None:
surf_data.bl_mat= bpy.data.materials.new(surf_data.name)
surf_data.bl_mat.diffuse_color= (surf_data.colr[:])
surf_data.bl_mat.diffuse_intensity= surf_data.diff
surf_data.bl_mat.emit= surf_data.lumi
surf_data.bl_mat.specular_intensity= surf_data.spec
if surf_data.refl != 0.0:
surf_data.bl_mat.raytrace_mirror.use= True
surf_data.bl_mat.raytrace_mirror.reflect_factor= surf_data.refl
surf_data.bl_mat.raytrace_mirror.gloss_factor= 1.0-surf_data.rblr
if surf_data.tran != 0.0:
surf_data.bl_mat.use_transparency= True
surf_data.bl_mat.transparency_method= 'RAYTRACE'
surf_data.bl_mat.alpha= 1.0 - surf_data.tran
surf_data.bl_mat.raytrace_transparency.ior= surf_data.rind
surf_data.bl_mat.raytrace_transparency.gloss_factor= 1.0 - surf_data.tblr
surf_data.bl_mat.translucency= surf_data.trnl
surf_data.bl_mat.specular_hardness= int(4*((10*surf_data.glos)*(10*surf_data.glos)))+4
# The Gloss is as close as possible given the differences.
# Single layer objects use the object file's name instead.
if len(object_layers) and object_layers[-1].name == 'Layer 1':
object_layers[-1].name= object_name
print("Building '%s' Object" % object_name)
else:
print("Building %d Objects" % len(object_layers))
# Before adding any meshes or armatures go into Object mode.
if bpy.ops.object.mode_set.poll():
bpy.ops.object.mode_set(mode='OBJECT')
for layer_data in object_layers:
me= bpy.data.meshes.new(layer_data.name)
me.vertices.add(len(layer_data.pnts))
me.tessfaces.add(len(layer_data.pols))
# for vi in range(len(layer_data.pnts)):
# me.vertices[vi].co= layer_data.pnts[vi]
# faster, would be faster again to use an array
me.vertices.foreach_set("co", [axis for co in layer_data.pnts for axis in co])
ngons= {} # To keep the FaceIdx consistent, handle NGons later.
edges= [] # Holds the FaceIdx of the 2-point polys.
for fi, fpol in enumerate(layer_data.pols):
fpol.reverse() # Reversing gives correct normal directions
# PointID 0 in the last element causes Blender to think it's un-used.
if fpol[-1] == 0:
fpol.insert(0, fpol[-1])
del fpol[-1]
vlen= len(fpol)
if vlen == 3 or vlen == 4:
for i in range(vlen):
me.tessfaces[fi].vertices_raw[i]= fpol[i]
elif vlen == 2:
edges.append(fi)
elif vlen != 1:
ngons[fi]= fpol # Deal with them later
ob= bpy.data.objects.new(layer_data.name, me)
bpy.context.scene.objects.link(ob)
ob_dict[layer_data.index]= [ob, layer_data.parent_index]
# Move the object so the pivot is in the right place.
ob.location= layer_data.pivot
# Create the Material Slots and assign the MatIndex to the correct faces.
mat_slot= 0
for surf_key in layer_data.surf_tags:
if object_tags[surf_key] in object_surfs:
me.materials.append(object_surfs[object_tags[surf_key]].bl_mat)
for fi in layer_data.surf_tags[surf_key]:
me.tessfaces[fi].material_index= mat_slot
me.tessfaces[fi].use_smooth= object_surfs[object_tags[surf_key]].smooth
mat_slot+=1
# Create the Vertex Groups (LW's Weight Maps).
if len(layer_data.wmaps) > 0:
print("Adding %d Vertex Groups" % len(layer_data.wmaps))
for wmap_key in layer_data.wmaps:
vgroup= ob.vertex_groups.new()
vgroup.name= wmap_key
wlist= layer_data.wmaps[wmap_key]
for pvp in wlist:
vgroup.add((pvp[0], ), pvp[1], 'REPLACE')
# Create the Shape Keys (LW's Endomorphs).
if len(layer_data.morphs) > 0:
print("Adding %d Shapes Keys" % len(layer_data.morphs))
ob.shape_key_add('Basis') # Got to have a Base Shape.
for morph_key in layer_data.morphs:
skey= ob.shape_key_add(morph_key)
dlist= layer_data.morphs[morph_key]
for pdp in dlist:
me.shape_keys.key_blocks[skey.name].data[pdp[0]].co= [pdp[1], pdp[2], pdp[3]]
# Create the Vertex Color maps.
if len(layer_data.colmaps) > 0:
print("Adding %d Vertex Color Maps" % len(layer_data.colmaps))
for cmap_key in layer_data.colmaps:
map_pack= create_mappack(layer_data, cmap_key, "COLOR")
me.vertex_colors.new(cmap_key)
vcol= me.tessface_vertex_colors[-1]
if not vcol or not vcol.data:
break
for fi in map_pack:
if fi > len(vcol.data):
continue
face= map_pack[fi]
colf= vcol.data[fi]
if len(face) > 2:
colf.color1= face[0]
colf.color2= face[1]
colf.color3= face[2]
if len(face) == 4:
colf.color4= face[3]
# Create the UV Maps.
if len(layer_data.uvmaps) > 0:
print("Adding %d UV Textures" % len(layer_data.uvmaps))
for uvmap_key in layer_data.uvmaps:
map_pack= create_mappack(layer_data, uvmap_key, "UV")
me.uv_textures.new(name=uvmap_key)
uvm= me.tessface_uv_textures[-1]
if not uvm or not uvm.data:
break
for fi in map_pack:
if fi > len(uvm.data):
continue
face= map_pack[fi]
uvf= uvm.data[fi]
if len(face) > 2:
uvf.uv1= face[0]
uvf.uv2= face[1]
uvf.uv3= face[2]
if len(face) == 4:
uvf.uv4= face[3]
# Now add the NGons.
if len(ngons) > 0:
for ng_key in ngons:
face_offset= len(me.tessfaces)
ng= ngons[ng_key]
v_locs= []
for vi in range(len(ng)):
v_locs.append(mathutils.Vector(layer_data.pnts[ngons[ng_key][vi]]))
tris= tessellate_polygon([v_locs])
me.tessfaces.add(len(tris))
for tri in tris:
face= me.tessfaces[face_offset]
face.vertices_raw[0]= ng[tri[0]]
face.vertices_raw[1]= ng[tri[1]]
face.vertices_raw[2]= ng[tri[2]]
face.material_index= me.tessfaces[ng_key].material_index
face.use_smooth= me.tessfaces[ng_key].use_smooth
face_offset+= 1
# FaceIDs are no longer a concern, so now update the mesh.
has_edges= len(edges) > 0 or len(layer_data.edge_weights) > 0
me.update(calc_edges=has_edges)
# Add the edges.
edge_offset= len(me.edges)
me.edges.add(len(edges))
for edge_fi in edges:
me.edges[edge_offset].vertices[0]= layer_data.pols[edge_fi][0]
me.edges[edge_offset].vertices[1]= layer_data.pols[edge_fi][1]
edge_offset+= 1
# Apply the Edge Weighting.
if len(layer_data.edge_weights) > 0:
for edge in me.edges:
edge_sa= "{0} {1}".format(edge.vertices[0], edge.vertices[1])
edge_sb= "{0} {1}".format(edge.vertices[1], edge.vertices[0])
if edge_sa in layer_data.edge_weights:
edge.crease= layer_data.edge_weights[edge_sa]
elif edge_sb in layer_data.edge_weights:
edge.crease= layer_data.edge_weights[edge_sb]
# Unfortunately we can't exlude certain faces from the subdivision.
if layer_data.has_subds and add_subd_mod:
ob.modifiers.new(name="Subsurf", type='SUBSURF')
# Should we build an armature from the embedded rig?
if len(layer_data.bones) > 0 and skel_to_arm:
bpy.ops.object.armature_add()
arm_object= bpy.context.active_object
arm_object.name= "ARM_" + layer_data.name
arm_object.data.name= arm_object.name
arm_object.location= layer_data.pivot
bpy.ops.object.mode_set(mode='EDIT')
build_armature(layer_data, arm_object.data.edit_bones)
bpy.ops.object.mode_set(mode='OBJECT')
# Clear out the dictionaries for this layer.
layer_data.bone_names.clear()
layer_data.bone_rolls.clear()
layer_data.wmaps.clear()
layer_data.colmaps.clear()
layer_data.uvmaps.clear()
layer_data.morphs.clear()
layer_data.surf_tags.clear()
# We may have some invalid mesh data, See: [#27916]
# keep this last!
print("validating mesh: %r..." % me.name)
me.validate(verbose=1)
print("done!")
# With the objects made, setup the parents and re-adjust the locations.
for ob_key in ob_dict:
if ob_dict[ob_key][1] != -1 and ob_dict[ob_key][1] in ob_dict:
parent_ob = ob_dict[ob_dict[ob_key][1]]
ob_dict[ob_key][0].parent= parent_ob[0]
ob_dict[ob_key][0].location-= parent_ob[0].location
bpy.context.scene.update()
print("Done Importing LWO File")
from bpy.props import StringProperty, BoolProperty
class IMPORT_OT_lwo(bpy.types.Operator):
"""Import LWO Operator"""
bl_idname= "import_scene.lwo"
bl_label= "Import LWO"
bl_description= "Import a LightWave Object file"
bl_options= {'REGISTER', 'UNDO'}
filepath= StringProperty(name="File Path", description="Filepath used for importing the LWO file", maxlen=1024, default="")
ADD_SUBD_MOD= BoolProperty(name="Apply SubD Modifier", description="Apply the Subdivision Surface modifier to layers with Subpatches", default=True)
LOAD_HIDDEN= BoolProperty(name="Load Hidden Layers", description="Load object layers that have been marked as hidden", default=False)
SKEL_TO_ARM= BoolProperty(name="Create Armature", description="Create an armature from an embedded Skelegon rig", default=True)
USE_EXISTING_MATERIALS= BoolProperty(name="Use Existing Materials", description="Use existing materials if a material by that name already exists", default=False)
def execute(self, context):
load_lwo(self.filepath,
context,
self.ADD_SUBD_MOD,
self.LOAD_HIDDEN,
self.SKEL_TO_ARM,
self.USE_EXISTING_MATERIALS)
return {'FINISHED'}
def invoke(self, context, event):
wm= context.window_manager
wm.fileselect_add(self)
return {'RUNNING_MODAL'}
def menu_func(self, context):
self.layout.operator(IMPORT_OT_lwo.bl_idname, text="LightWave Object (.lwo)")
def register():
bpy.utils.register_module(__name__)
bpy.types.INFO_MT_file_import.append(menu_func)
def unregister():
bpy.utils.unregister_module(__name__)
bpy.types.INFO_MT_file_import.remove(menu_func)
if __name__ == "__main__":
register()