def _convert_nodes(
rsm_version: int, nodes: List[AbstractNode],
tex_id_by_node: List[List[int]],
gltf_model: GLTFModel) -> Tuple[List[FileResource], List[int]]:
root_nodes = []
model_bbox = calculate_model_bounding_box(rsm_version, nodes)
for node in nodes:
if node.parent is None:
_compute_transform_matrices(rsm_version, node,
len(nodes) == 0, model_bbox)
nodes_children: Dict[str, List[int]] = {}
vertex_bytearray = bytearray()
tex_vertex_bytearray = bytearray()
byteoffset = 0
tex_byteoffset = 0
for node_id, node in enumerate(nodes):
rsm_node = node.impl
node_name = decode_string(rsm_node.name)
if node.parent is not None:
parent_name = decode_string(node.parent.impl.name)
if parent_name in nodes_children:
nodes_children[parent_name] += [node_id]
else:
nodes_children[parent_name] = [node_id]
if rsm_version >= 0x203:
node_tex_ids = tex_id_by_node[node_id]
else:
node_tex_ids = rsm_node.texture_ids
vertices_by_texture = _sort_vertices_by_texture(rsm_node, node_tex_ids)
gltf_primitives = []
for tex_id, vertices in vertices_by_texture.items():
# Model vertices
bytelen = _serialize_vertices(vertices[0], vertex_bytearray)
# Texture vertices
tex_bytelen = _serialize_vertices(vertices[1],
tex_vertex_bytearray)
(mins, maxs) = _calculate_vertices_bounds(vertices[0])
(tex_mins, tex_maxs) = _calculate_vertices_bounds(vertices[1])
gltf_model.bufferViews.append(
BufferView(
buffer=0, # Vertices
byteOffset=byteoffset,
byteLength=bytelen,
target=BufferTarget.ARRAY_BUFFER.value))
gltf_model.bufferViews.append(
BufferView(
buffer=1, # Texture vertices
byteOffset=tex_byteoffset,
byteLength=tex_bytelen,
target=BufferTarget.ARRAY_BUFFER.value))
buffer_view_id = len(gltf_model.accessors)
gltf_model.accessors.append(
Accessor(bufferView=buffer_view_id,
byteOffset=0,
componentType=ComponentType.FLOAT.value,
count=len(vertices[0]),
type=AccessorType.VEC3.value,
min=mins,
max=maxs))
gltf_model.accessors.append(
Accessor(bufferView=buffer_view_id + 1,
byteOffset=0,
componentType=ComponentType.FLOAT.value,
count=len(vertices[1]),
type=AccessorType.VEC2.value,
min=tex_mins,
max=tex_maxs))
gltf_primitives.append(
Primitive(attributes=Attributes(POSITION=buffer_view_id + 0,
TEXCOORD_0=buffer_view_id + 1),
material=tex_id))
byteoffset += bytelen
tex_byteoffset += tex_bytelen
gltf_model.meshes.append(Mesh(primitives=gltf_primitives))
# Decompose matrix to TRS
translation, rotation, scale = decompose_matrix(
node.gltf_transform_matrix)
gltf_model.nodes.append(
Node(name=node_name,
mesh=node_id,
translation=translation.to_list() if translation else None,
rotation=rotation.to_list() if rotation else None,
scale=scale.to_list() if scale else None))
if node.parent is None:
root_nodes.append(node_id)
# Register vertex buffers
vtx_file_name = 'vertices.bin'
tex_vtx_file_name = 'tex_vertices.bin'
gltf_resources = [
FileResource(vtx_file_name, data=vertex_bytearray),
FileResource(tex_vtx_file_name, data=tex_vertex_bytearray)
]
gltf_model.buffers = [
Buffer(byteLength=byteoffset, uri=vtx_file_name),
Buffer(byteLength=tex_byteoffset, uri=tex_vtx_file_name)
]
# Update nodes' children
# Note(LinkZ): Consume children with `pop` to avoid issues with models
# containing multiple nodes with the same name
for gltf_node in gltf_model.nodes:
gltf_node.children = nodes_children.pop(gltf_node.name, None)
return gltf_resources, root_nodes
def export_gltf(icon, filename, metadata=None):
basename = PurePath(filename).stem
vertex_info_format = ("3f" * icon.animation_shapes) + "3f 2f 3f"
float_size = struct.calcsize("f")
animation_speed = 0.1
animation_present = icon.animation_shapes > 1
model_data = bytearray()
mins = {}
maxs = {}
for i, vertex in enumerate(icon.vertices):
for j, position in enumerate(vertex.positions):
if j == 0:
values_basis = [
position.x / 4096, -position.y / 4096, -position.z / 4096
]
values = values_basis
else:
# Subtract basis position to compensate for shape keys being relative to basis
values = [
position.x / 4096 - values_basis[0],
-position.y / 4096 - values_basis[1],
-position.z / 4096 - values_basis[2]
]
if j not in mins:
mins[j] = values.copy()
else:
if values[0] < mins[j][0]: mins[j][0] = values[0]
if values[1] < mins[j][1]: mins[j][1] = values[1]
if values[2] < mins[j][2]: mins[j][2] = values[2]
if j not in maxs:
maxs[j] = values.copy()
else:
if values[0] > maxs[j][0]: maxs[j][0] = values[0]
if values[1] > maxs[j][1]: maxs[j][1] = values[1]
if values[2] > maxs[j][2]: maxs[j][2] = values[2]
model_data.extend(struct.pack("3f", *values))
model_data.extend(
struct.pack("3f 2f 3f", vertex.normal.x / 4096,
-vertex.normal.y / 4096, -vertex.normal.z / 4096,
1.0 - (vertex.tex_coord.u / 4096),
1.0 - (vertex.tex_coord.v / 4096),
vertex.color.r / 255, vertex.color.g / 255,
vertex.color.b / 255))
# Generate animation data if multiple animation shapes are present
if animation_present:
animation_offset = len(model_data)
for i in range(icon.frame_count + 1):
model_data.extend(struct.pack("f", i * animation_speed))
for i, frame in enumerate(icon.frames + [icon.frames[0]]):
segment = [struct.pack("f", 0.0)] * (icon.animation_shapes - 1)
if frame.shape_id != 0:
segment[frame.shape_id - 1] = struct.pack("f", 1.0)
for item in segment:
model_data.extend(item)
animation_length = len(model_data) - animation_offset
# Generate texture
if isinstance(icon.texture, Ps2ico.CompressedTexture):
image_data = convert_compressed_texture_data(icon.texture.size,
icon.texture.data)
elif isinstance(icon.texture, Ps2ico.UncompressedTexture):
image_data = convert_uncompressed_texture_data(icon.texture.data)
with BytesIO() as png:
PILImage.frombytes("RGB", (128, 128), image_data).save(png, "png")
texture_data = png.getvalue()
# Basic glTF info
model = GLTFModel()
model.asset = Asset(version="2.0", generator=f"ico2gltf v{VERSION}")
model.scenes = [Scene(nodes=[0])]
model.scene = 0
model.nodes = [Node(mesh=0)]
# If present, embed metadata
if metadata:
# Normalize title: turn japanese full-width characters into normal ones and insert the line break
title = unicodedata.normalize("NFKC", metadata.title).rstrip("\x00")
title = title[:metadata.offset_2nd_line //
2] + "\n" + title[metadata.offset_2nd_line // 2:]
model.extras = {
"title":
title,
"background_opacity":
metadata.bg_opacity / 0x80,
"background_bottom_left_color": [
metadata.bg_color_lowerleft.r / 0x80,
metadata.bg_color_lowerleft.g / 0x80,
metadata.bg_color_lowerleft.b / 0x80,
metadata.bg_color_lowerleft.a / 0x80
],
"background_bottom_right_color": [
metadata.bg_color_lowerright.r / 0x80,
metadata.bg_color_lowerright.g / 0x80,
metadata.bg_color_lowerright.b / 0x80,
metadata.bg_color_lowerright.a / 0x80
],
"background_top_left_color": [
metadata.bg_color_upperleft.r / 0x80,
metadata.bg_color_upperleft.g / 0x80,
metadata.bg_color_upperleft.b / 0x80,
metadata.bg_color_upperleft.a / 0x80
],
"background_top_right_color": [
metadata.bg_color_upperright.r / 0x80,
metadata.bg_color_upperright.g / 0x80,
metadata.bg_color_upperright.b / 0x80,
metadata.bg_color_lowerright.a / 0x80
],
"ambient_color": [
metadata.light_ambient_color.r, metadata.light_ambient_color.g,
metadata.light_ambient_color.b
],
"light1_direction": [
metadata.light1_direction.x, metadata.light1_direction.y,
metadata.light1_direction.z
],
"light1_color": [
metadata.light1_color.r, metadata.light1_color.g,
metadata.light1_color.b, metadata.light1_color.a
],
"light2_direction": [
metadata.light2_direction.x, metadata.light2_direction.y,
metadata.light2_direction.z
],
"light2_color": [
metadata.light2_color.r, metadata.light2_color.g,
metadata.light2_color.b, metadata.light2_color.a
],
"light3_direction": [
metadata.light3_direction.x, metadata.light3_direction.y,
metadata.light3_direction.z
],
"light3_color": [
metadata.light3_color.r, metadata.light3_color.g,
metadata.light3_color.b, metadata.light3_color.a
],
}
# Meshes
primitive = Primitive(attributes=Attributes(
POSITION=0,
NORMAL=icon.animation_shapes,
TEXCOORD_0=icon.animation_shapes + 1,
COLOR_0=icon.animation_shapes + 2),
material=0)
if animation_present:
primitive.targets = [{
"POSITION": i + 1
} for i in range(icon.animation_shapes - 1)]
model.meshes = [Mesh(name="Icon", primitives=[primitive])]
# Buffers
model.buffers = [
Buffer(uri=f"{basename}.bin", byteLength=len(model_data)),
Buffer(uri=f"{basename}.png", byteLength=len(texture_data))
]
# Materials
model.images = [Image(bufferView=1, mimeType="image/png")]
model.textures = [Texture(source=0)]
model.materials = [
Material(name="Material",
pbrMetallicRoughness=PBRMetallicRoughness(
baseColorTexture=TextureInfo(index=0),
roughnessFactor=1,
metallicFactor=0))
]
# Animations
if animation_present:
model.animations = [
Animation(name="Default",
samplers=[
AnimationSampler(
input=icon.animation_shapes + 3,
output=icon.animation_shapes + 4,
interpolation=Interpolation.LINEAR.value)
],
channels=[
Channel(sampler=0,
target=Target(node=0, path="weights"))
]),
]
# Buffer Views
model.bufferViews = [
BufferView(name="Data",
buffer=0,
byteStride=struct.calcsize(vertex_info_format),
byteLength=len(model_data)),
BufferView(name="Texture", buffer=1, byteLength=len(texture_data)),
]
if animation_present:
model.bufferViews.append(
BufferView(name="Animation",
buffer=0,
byteOffset=animation_offset,
byteLength=animation_length), )
# Accessors
model.accessors = [
Accessor(name=f"Position {i}",
bufferView=0,
byteOffset=i * 3 * float_size,
min=mins[i],
max=maxs[i],
count=len(icon.vertices),
componentType=ComponentType.FLOAT.value,
type=AccessorType.VEC3.value)
for i in range(icon.animation_shapes)
]
model.accessors.extend([
Accessor(name="Normal",
bufferView=0,
byteOffset=((icon.animation_shapes - 1) * 3 * float_size) +
3 * float_size,
count=len(icon.vertices),
componentType=ComponentType.FLOAT.value,
type=AccessorType.VEC3.value),
Accessor(name="UV",
bufferView=0,
byteOffset=((icon.animation_shapes - 1) * 3 * float_size) +
6 * float_size,
count=len(icon.vertices),
componentType=ComponentType.FLOAT.value,
type=AccessorType.VEC2.value),
Accessor(name="Color",
bufferView=0,
byteOffset=((icon.animation_shapes - 1) * 3 * float_size) +
8 * float_size,
count=len(icon.vertices),
componentType=ComponentType.FLOAT.value,
type=AccessorType.VEC3.value),
])
if animation_present:
model.accessors.extend([
Accessor(name="Animation Time",
bufferView=2,
byteOffset=0,
min=[0.0],
max=[(icon.frame_count) * animation_speed],
count=(icon.frame_count + 1),
componentType=ComponentType.FLOAT.value,
type=AccessorType.SCALAR.value),
Accessor(name="Animation Data",
bufferView=2,
byteOffset=(icon.frame_count + 1) * float_size,
min=[0.0],
max=[1.0],
count=(icon.frame_count + 1) *
(icon.animation_shapes - 1),
componentType=ComponentType.FLOAT.value,
type=AccessorType.SCALAR.value)
])
resources = [
FileResource(f"{basename}.bin", data=model_data),
FileResource(f"{basename}.png", data=texture_data)
]
gltf = GLTF(model=model, resources=resources)
gltf.export(filename)
