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Blender 4.0 fix #22

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c668b05
vertex colors to color attributes
oakwoodwolf Apr 28, 2025
ceee726
import flag and sample json
oakwoodwolf Apr 29, 2025
803115f
fix missasigned textures
oakwoodwolf May 4, 2025
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4 changes: 3 additions & 1 deletion B3DParser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,7 @@ def parse(self, filepath):
pos = self.f(2)
scale = self.f(2)
rot = self.f(1)[0]
data.append(dotdict({'name':name,'position':pos,'scale':scale,'rotation':rot}))
data.append(dotdict({'name':name,'position':pos,'scale':scale,'rotation':rot, 'flags':flags,'blend':blend}))
self.cb_data(chunk,{'textures':data})

elif chunk=='BRUS':
Expand Down Expand Up @@ -229,5 +229,7 @@ def dump(node, level=0):
data = B3DTree().parse(filepath) # json tree
import json
print(json.dumps(data, indent=1))
#f = open(filepath+".json", "w")
#f.write(json.dumps(data, indent=1))
#dump(data)

191 changes: 113 additions & 78 deletions export_b3d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -69,9 +69,9 @@
TRANS_MATRIX = mathutils.Matrix([[1,0,0,0],[0,0,1,0],[0,1,0,0],[0,0,0,1]])
BONE_TRANS_MATRIX = mathutils.Matrix([[-1,0,0,0],[0,0,-1,0],[0,-1,0,0],[0,0,0,1]])

DEBUG = False
DEBUG = True
PROGRESS = True
PROGRESS_VERBOSE = False
PROGRESS_VERBOSE = True

tesselated_objects = {}

Expand Down Expand Up @@ -157,19 +157,29 @@ def write_b3d_file(filename, settings, objects=[]):

print("Exported in", (end - start))

# Keeping this function around as the vertex_colors API is deprecated and may disappear in the future
def getVertexColors(obj_data):
return obj_data.vertex_colors
return obj_data.color_attributes

def getFaceImage(face):
def getFaceImage(face, obj):
try:
material = bpy.data.materials[face.material_index]
texImage = material.node_tree.nodes["Image Texture"]
return texImage.image
except:
pass
mat_index = face.material_index
if mat_index >= len(obj.data.materials):
return None

material = obj.data.materials[mat_index]
if not material or not material.use_nodes:
return None

for node in material.node_tree.nodes:
if node.type == 'TEX_IMAGE' and node.image:
return node.image

except Exception as e:
print(f"getFaceImage error: {e}")

return None


# ==== Write TEXS Chunk ====
def write_texs(objects, settings):
global trimmed_paths
Expand Down Expand Up @@ -246,7 +256,23 @@ def write_texs(objects, settings):
enable_mipmaps=8
else:
enable_mipmaps=0
texture_flags[obj_count][iuvlayer] = tex_flag | enable_mipmaps
tiling = 0
mapping = 0
material = bpy.data.materials[face.material_index]
if material.node_tree:
texImage = material.node_tree.nodes["Image Texture"]
if texImage:
if texImage.extension is 'EXTEND':
tiling = 48
elif texImage.extension is 'MIRROR':
tiling = 24578

if texImage.projection is 'SPHERE':
mapping = 64
elif texImage.projection is 'BOX':
mapping = 128

texture_flags[obj_count][iuvlayer] = tex_flag + enable_mipmaps + tiling + mapping
set_wrote = 1

for face in data.polygons:
Expand All @@ -261,7 +287,7 @@ def write_texs(objects, settings):

#if DEBUG: print("<uv face=", face.index, ">")

img = getFaceImage(face)
img = getFaceImage(face,obj)
if img:
if img.filepath in trimmed_paths:
img_name = trimmed_paths[img.filepath]
Expand Down Expand Up @@ -332,38 +358,36 @@ def write_brus(objects, settings):
for face in data.polygons:
face_stack = []

for iuvlayer,uvlayer in enumerate(uv_textures):
if iuvlayer < 8:
for i, iuvlayer in enumerate(uv_textures):
if i < 8:

img_id = -1

if face.index >= len(uv_textures[iuvlayer].data):
continue
# if face.index >= len(uv_textures[iuvlayer].data):
# continue

img = getFaceImage(face)
img = getFaceImage(face,obj)

if not img:
continue

img_found = 1
if img:
img_found = 1

if img.filepath in trimmed_paths:
img_name = trimmed_paths[img.filepath]
else:
img_name = os.path.basename(img.filepath)
trimmed_paths[img.filepath] = img_name
if img.filepath in trimmed_paths:
img_name = trimmed_paths[img.filepath]
else:
img_name = os.path.basename(img.filepath)
trimmed_paths[img.filepath] = img_name

if DEBUG: print(" <!-- Building FACE 'stack' -->")
if DEBUG: print(" <!-- Building FACE 'stack' -->")

if img_name in texs_stack:
img_id = texs_stack[img_name][TEXTURE_ID]
if img_name in texs_stack:
img_id = texs_stack[img_name][TEXTURE_ID]

face_stack.insert(iuvlayer,img_id)
if DEBUG: print(" <uv face=",face.index,"layer=", iuvlayer, " imgid=", img_id, "/>")
face_stack.insert(i,img_id)
if DEBUG: print(" <uv face=",face.index,"layer=", iuvlayer, " imgid=", img_id, "/>")

for i in range(len(face_stack),texture_count):
face_stack.append(-1)

img_found = any(i >= 0 for i in face_stack)

if DEBUG: print(" <!-- Writing chunk -->")

Expand All @@ -376,27 +400,31 @@ def write_brus(objects, settings):
mat_colb = mat_data.diffuse_color[2]
mat_alpha = 1.0 # mat_data.alpha # 2.8 fail!
mat_name = mat_data.name

mat_shine = abs(-1.0 + mat_data.roughness)
mat_fx = 0
if mat_data.use_backface_culling is True:
mat_fx += 16

if not mat_name in brus_stack:
brus_stack.append(mat_name)
temp_buf += write_string(mat_name) #Brush Name
temp_buf += write_float(mat_colr) #Red
temp_buf += write_float(mat_colg) #Green
temp_buf += write_float(mat_colb) #Blue
temp_buf += write_float(mat_alpha) #Alpha
temp_buf += write_float(0) #Shininess
temp_buf += write_float(mat_shine) #Shininess
temp_buf += write_int(1) #Blend
if settings.get("export_colors") and len(getVertexColors(data)):
temp_buf += write_int(2) #Fx
else:
temp_buf += write_int(0) #Fx

mat_fx += 2 #Fx
temp_buf += write_int(mat_fx)
for i in face_stack:
temp_buf += write_int(i) #Texture ID
else:
if settings.get("export_colors") and len(getVertexColors(data)) > 0:
if not face_stack in brus_stack:
brus_stack.append(face_stack)
face_stack_key = tuple(face_stack)
if face_stack_key not in brus_stack:
brus_stack.append(face_stack_key)
mat_count += 1
temp_buf += write_string("Brush.%.3i"%mat_count) #Brush Name
temp_buf += write_float(1) #Red
Expand All @@ -410,30 +438,42 @@ def write_brus(objects, settings):
for i in face_stack:
temp_buf += write_int(i) #Texture ID
else: # img_found
if data.materials:
if data.materials[face.material_index]:
mat_data = data.materials[face.material_index]
mat_colr = mat_data.diffuse_color[0]
mat_colg = mat_data.diffuse_color[1]
mat_colb = mat_data.diffuse_color[2]
mat_alpha = 1.0 # mat_data.alpha # 2.8 fail!
mat_name = mat_data.name
mat_shine = abs(-1.0 + mat_data.roughness)
mat_fx = 0
if mat_data.use_backface_culling is True:
mat_fx += 16

if not face_stack in brus_stack:
brus_stack.append(face_stack)
mat_count += 1
temp_buf += write_string(mat_name) #Brush Name
temp_buf += write_float(mat_colr) #Red
temp_buf += write_float(mat_colg) #Green
temp_buf += write_float(mat_colb) #Blue
temp_buf += write_float(mat_alpha) #Alpha
temp_buf += write_float(mat_shine) #Shininess
temp_buf += write_int(1) #Blend
if DEBUG: print(" <brush id=",len(brus_stack),">")

if not face_stack in brus_stack:
brus_stack.append(face_stack)
mat_count += 1
temp_buf += write_string("Brush.%.3i"%mat_count) #Brush Name
temp_buf += write_float(1) #Red
temp_buf += write_float(1) #Green
temp_buf += write_float(1) #Blue
temp_buf += write_float(1) #Alpha
temp_buf += write_float(0) #Shininess
temp_buf += write_int(1) #Blend

if DEBUG: print(" <brush id=",len(brus_stack),">")
if settings.get("export_colors") and len(getVertexColors(data)) > 0:
mat_fx += 2 #Fx


if settings.get("export_colors") and len(getVertexColors(data)) > 0:
temp_buf += write_int(2) #Fx
else:
temp_buf += write_int(0) #Fx
temp_buf += write_int(mat_fx) #Fx

for i in face_stack:
temp_buf += write_int(i) #Texture ID
if DEBUG: print(" <texture id=",i,">")
for i in face_stack:
temp_buf += write_int(i) #Texture ID
if DEBUG: print(" <texture id=",i,">")

if DEBUG: print(" </brush>")
if DEBUG: print(" </brush>")

if DEBUG: print("")

Expand Down Expand Up @@ -840,7 +880,7 @@ def write_node_mesh(settings, obj, arm_action):

temp_buf += write_int(-1) #Brush ID
temp_buf += write_node_mesh_vrts(settings, obj, data, arm_action) #NODE MESH VRTS
temp_buf += write_node_mesh_tris(data) #NODE MESH TRIS
temp_buf += write_node_mesh_tris(obj,data) #NODE MESH TRIS

if len(temp_buf) > 0:
mesh_buf += write_chunk(b"MESH",temp_buf)
Expand Down Expand Up @@ -946,19 +986,14 @@ def write_node_mesh_vrts(settings, obj, data, arm_action):

if settings.get("export_colors") and len(getVertexColors(data)) > 0:
vertex_colors = getVertexColors(data)
if vertex_id == 0:
vcolor = vertex_colors[0].data[face.index].color1
elif vertex_id == 1:
vcolor = vertex_colors[0].data[face.index].color2
elif vertex_id == 2:
vcolor = vertex_colors[0].data[face.index].color3
elif vertex_id == 3:
vcolor = vertex_colors[0].data[face.index].color4

temp_buf.append(write_float_quad(vcolor.r, #R
vcolor.g, #G
vcolor.b, #B
1.0)) #A (FIXME?)
color_data = vertex_colors[0].data
# get the color for this face corner
vcolor = color_data[face.loop_start + vertex_id].color
r, g, b, a = vcolor
temp_buf.append(write_float_quad(r, #R
g, #G
b, #B
a)) #A (FIXME?)

for vg in obj.vertex_groups:
w = 0.0
Expand All @@ -975,8 +1010,9 @@ def write_node_mesh_vrts(settings, obj, data, arm_action):
# uv_layers_count is from data.uv_layers

for iuvlayer in range(uv_layers_count):
uv = my_uvs[face.index][vertex_id]
temp_buf.append(write_float_couple(uv[0], 1-uv[1]) )
uvlayer = data.uv_layers[iuvlayer]
uv = uvlayer.data[loop_index].uv
temp_buf.append(write_float_couple(uv[0], 1 - uv[1]))

if DEBUG: print("")

Expand All @@ -987,7 +1023,7 @@ def write_node_mesh_vrts(settings, obj, data, arm_action):
return vrts_buf

# ==== Write NODE MESH TRIS Chunk ====
def write_node_mesh_tris(data):
def write_node_mesh_tris(obj,data):
global texture_count

# An dictoriary that maps all brush-ids to a list of faces
Expand All @@ -996,7 +1032,6 @@ def write_node_mesh_tris(data):
dBrushId2Face = {}

if DEBUG: print("")

for face in data.polygons:
img_found = 0
face_stack = []
Expand All @@ -1010,7 +1045,7 @@ def write_node_mesh_tris(data):

img_id = -1

img = getFaceImage(face)
img = getFaceImage(face,obj)

if img:
if img.filepath in trimmed_paths:
Expand Down
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