MMD Importing Start
- This is a basic start to try and import both pmx and pmd files, not working 100% at the minute but I working on getting it working.
This commit is contained in:
Yusarina
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import bpy
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import struct
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def read_pmx_header(file):
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# Read PMX header information
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magic = file.read(4)
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if magic != b'PMX ':
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raise ValueError("Invalid PMX file")
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version = struct.unpack('<f', file.read(4))[0]
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# Read additional header fields
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data_size = struct.unpack('<i', file.read(4))[0]
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encoding = struct.unpack('<b', file.read(1))[0]
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additional_uvs = struct.unpack('<b', file.read(1))[0]
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vertex_index_size = struct.unpack('<b', file.read(1))[0]
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texture_index_size = struct.unpack('<b', file.read(1))[0]
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material_index_size = struct.unpack('<b', file.read(1))[0]
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bone_index_size = struct.unpack('<b', file.read(1))[0]
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morph_index_size = struct.unpack('<b', file.read(1))[0]
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rigid_body_index_size = struct.unpack('<b', file.read(1))[0]
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# Read model name and comments
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model_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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model_english_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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model_comment = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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model_english_comment = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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return version, encoding, additional_uvs, vertex_index_size, texture_index_size, material_index_size, bone_index_size, morph_index_size, rigid_body_index_size, model_name, model_english_name, model_comment, model_english_comment
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def read_vertex(file, vertex_index_size):
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position = struct.unpack('<3f', file.read(12))
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normal = struct.unpack('<3f', file.read(12))
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uv = struct.unpack('<2f', file.read(8))
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if vertex_index_size == 1:
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bone_indices = list(struct.unpack('<4B', file.read(4)))
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elif vertex_index_size == 2:
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bone_indices = list(struct.unpack('<4H', file.read(8)))
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else:
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bone_indices = list(struct.unpack('<4I', file.read(16)))
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bone_weights = list(struct.unpack('<4f', file.read(16)))
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edge_scale = struct.unpack('<f', file.read(4))[0]
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return position, normal, uv, bone_indices, bone_weights, edge_scale
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def read_material(file, texture_index_size):
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material_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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material_english_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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diffuse_color = struct.unpack('<4f', file.read(16))
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specular_color = struct.unpack('<3f', file.read(12))
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specular_strength = struct.unpack('<f', file.read(4))[0]
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ambient_color = struct.unpack('<3f', file.read(12))
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flag = struct.unpack('<b', file.read(1))[0]
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edge_color = struct.unpack('<4f', file.read(16))
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edge_size = struct.unpack('<f', file.read(4))[0]
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texture_index = struct.unpack(f'<{texture_index_size}B', file.read(texture_index_size))[0]
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sphere_texture_index = struct.unpack(f'<{texture_index_size}B', file.read(texture_index_size))[0]
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sphere_mode = struct.unpack('<b', file.read(1))[0]
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toon_sharing_flag = struct.unpack('<b', file.read(1))[0]
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if toon_sharing_flag == 0:
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toon_texture_index = struct.unpack(f'<{texture_index_size}B', file.read(texture_index_size))[0]
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else:
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toon_texture_index = struct.unpack('<b', file.read(1))[0]
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comment = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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return material_name, material_english_name, diffuse_color, specular_color, specular_strength, ambient_color, flag, edge_color, edge_size, texture_index, sphere_texture_index, sphere_mode, toon_sharing_flag, toon_texture_index, comment
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def read_bone(file, bone_index_size):
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bone_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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bone_english_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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position = struct.unpack('<3f', file.read(12))
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parent_bone_index = struct.unpack(f'<{bone_index_size}B', file.read(bone_index_size))[0]
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layer = struct.unpack('<i', file.read(4))[0]
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flag = struct.unpack('<H', file.read(2))[0]
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if flag & 0x0001:
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tail_position = struct.unpack('<3f', file.read(12))
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else:
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tail_index = struct.unpack(f'<{bone_index_size}B', file.read(bone_index_size))[0]
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if flag & 0x0100 or flag & 0x0200:
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inherit_bone_parent_index = struct.unpack(f'<{bone_index_size}B', file.read(bone_index_size))[0]
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inherit_bone_parent_influence = struct.unpack('<f', file.read(4))[0]
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if flag & 0x0400:
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fixed_axis = struct.unpack('<3f', file.read(12))
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if flag & 0x0800:
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local_x_vector = struct.unpack('<3f', file.read(12))
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local_z_vector = struct.unpack('<3f', file.read(12))
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if flag & 0x2000:
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external_key = struct.unpack('<i', file.read(4))[0]
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if flag & 0x0020:
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ik_target_bone_index = struct.unpack(f'<{bone_index_size}B', file.read(bone_index_size))[0]
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ik_loop_count = struct.unpack('<i', file.read(4))[0]
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ik_limit_radian = struct.unpack('<f', file.read(4))[0]
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ik_link_count = struct.unpack('<i', file.read(4))[0]
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ik_links = []
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for _ in range(ik_link_count):
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ik_link_bone_index = struct.unpack(f'<{bone_index_size}B', file.read(bone_index_size))[0]
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ik_link_limit_min = struct.unpack('<3f', file.read(12))
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ik_link_limit_max = struct.unpack('<3f', file.read(12))
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ik_links.append((ik_link_bone_index, ik_link_limit_min, ik_link_limit_max))
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return bone_name, bone_english_name, position, parent_bone_index, layer, flag, tail_position, inherit_bone_parent_index, inherit_bone_parent_influence, fixed_axis, local_x_vector, local_z_vector, external_key, ik_target_bone_index, ik_loop_count, ik_limit_radian, ik_links
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def read_morph(file, morph_index_size):
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morph_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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morph_english_name = file.read(struct.unpack('<i', file.read(4))[0]).decode('utf-16-le')
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panel = struct.unpack('<b', file.read(1))[0]
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morph_type = struct.unpack('<b', file.read(1))[0]
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offset_size = struct.unpack('<i', file.read(4))[0]
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morph_data = []
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for _ in range(offset_size):
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if morph_type == 0: # Group
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morph_index = struct.unpack(f'<{morph_index_size}B', file.read(morph_index_size))[0]
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morph_value = struct.unpack('<f', file.read(4))[0]
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morph_data.append((morph_index, morph_value))
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elif morph_type == 1: # Vertex
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vertex_index = struct.unpack('<i', file.read(4))[0]
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position_offset = struct.unpack('<3f', file.read(12))
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morph_data.append((vertex_index, position_offset))
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elif morph_type == 2: # Bone
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bone_index = struct.unpack(f'<{morph_index_size}B', file.read(morph_index_size))[0]
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position_offset = struct.unpack('<3f', file.read(12))
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rotation_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((bone_index, position_offset, rotation_offset))
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elif morph_type == 3: # UV
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vertex_index = struct.unpack('<i', file.read(4))[0]
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uv_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((vertex_index, uv_offset))
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elif morph_type == 4: # UV extended1
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vertex_index = struct.unpack('<i', file.read(4))[0]
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uv_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((vertex_index, uv_offset))
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elif morph_type == 5: # UV extended2
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vertex_index = struct.unpack('<i', file.read(4))[0]
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uv_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((vertex_index, uv_offset))
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elif morph_type == 6: # UV extended3
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vertex_index = struct.unpack('<i', file.read(4))[0]
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uv_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((vertex_index, uv_offset))
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elif morph_type == 7: # UV extended4
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vertex_index = struct.unpack('<i', file.read(4))[0]
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uv_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((vertex_index, uv_offset))
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elif morph_type == 8: # Material
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material_index = struct.unpack('<i', file.read(4))[0]
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offset_type = struct.unpack('<b', file.read(1))[0]
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diffuse_offset = struct.unpack('<4f', file.read(16))
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specular_offset = struct.unpack('<3f', file.read(12))
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specular_factor_offset = struct.unpack('<f', file.read(4))[0]
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ambient_offset = struct.unpack('<3f', file.read(12))
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edge_color_offset = struct.unpack('<4f', file.read(16))
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edge_size_offset = struct.unpack('<f', file.read(4))[0]
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texture_factor_offset = struct.unpack('<4f', file.read(16))
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sphere_texture_factor_offset = struct.unpack('<4f', file.read(16))
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toon_texture_factor_offset = struct.unpack('<4f', file.read(16))
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morph_data.append((material_index, offset_type, diffuse_offset, specular_offset, specular_factor_offset, ambient_offset, edge_color_offset, edge_size_offset, texture_factor_offset, sphere_texture_factor_offset, toon_texture_factor_offset))
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return morph_name, morph_english_name, panel, morph_type, morph_data
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def import_pmx(filepath):
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try:
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with open(filepath, 'rb') as file:
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version, encoding, additional_uvs, vertex_index_size, texture_index_size, material_index_size, bone_index_size, morph_index_size, rigid_body_index_size, model_name, model_english_name, model_comment, model_english_comment = read_pmx_header(file)
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# Read vertices
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vertex_count = struct.unpack('<i', file.read(4))[0]
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vertices = []
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for _ in range(vertex_count):
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position, normal, uv, bone_indices, bone_weights, edge_scale = read_vertex(file, vertex_index_size)
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vertices.append((position, normal, uv, bone_indices, bone_weights, edge_scale))
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# Read faces
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face_count = struct.unpack('<i', file.read(4))[0]
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faces = []
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for _ in range(face_count // 3):
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face_indices = struct.unpack('<3i', file.read(12))
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faces.append(face_indices)
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# Read textures
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texture_count = struct.unpack('<i', file.read(4))[0]
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textures = []
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for _ in range(texture_count):
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texture_path_length = struct.unpack('<i', file.read(4))[0]
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texture_path_data = file.read(texture_path_length)
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texture_path = texture_path_data.decode('utf-16-le', errors='replace').rstrip('\0')
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textures.append(texture_path)
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# Read materials
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material_count = struct.unpack('<i', file.read(4))[0]
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materials = []
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for _ in range(material_count):
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material_name, material_english_name, diffuse_color, specular_color, specular_strength, ambient_color, flag, edge_color, edge_size, texture_index, sphere_texture_index, sphere_mode, toon_sharing_flag, toon_texture_index, comment = read_material(file, texture_index_size)
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materials.append((material_name, material_english_name, diffuse_color, specular_color, specular_strength, ambient_color, flag, edge_color, edge_size, texture_index, sphere_texture_index, sphere_mode, toon_sharing_flag, toon_texture_index, comment))
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# Read bones
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bone_count = struct.unpack('<i', file.read(4))[0]
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bones = []
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for _ in range(bone_count):
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bone_name, bone_english_name, position, parent_bone_index, layer, flag, tail_position, inherit_bone_parent_index, inherit_bone_parent_influence, fixed_axis, local_x_vector, local_z_vector, external_key, ik_target_bone_index, ik_loop_count, ik_limit_radian, ik_links = read_bone(file, bone_index_size)
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bones.append((bone_name, bone_english_name, position, parent_bone_index, layer, flag, tail_position, inherit_bone_parent_index, inherit_bone_parent_influence, fixed_axis, local_x_vector, local_z_vector, external_key, ik_target_bone_index, ik_loop_count, ik_limit_radian, ik_links))
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# Read morphs
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morph_count = struct.unpack('<i', file.read(4))[0]
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morphs = []
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for _ in range(morph_count):
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morph_name, morph_english_name, panel, morph_type, morph_data = read_morph(file, morph_index_size)
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morphs.append((morph_name, morph_english_name, panel, morph_type, morph_data))
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# Create Blender objects and assign PMX data
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mesh = bpy.data.meshes.new(model_name)
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mesh.from_pydata([v[0] for v in vertices], [], faces)
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mesh.update()
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obj = bpy.data.objects.new(model_name, mesh)
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bpy.context.collection.objects.link(obj)
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# Assign vertex normals
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for i, vertex in enumerate(vertices):
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mesh.vertices[i].normal = vertex[1]
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# Assign UV coordinates
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uv_layer = mesh.uv_layers.new()
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for i, vertex in enumerate(vertices):
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uv_layer.data[i].uv = vertex[2]
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# Assign materials
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for material_data in materials:
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material = bpy.data.materials.new(material_data[0])
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material.diffuse_color = material_data[2]
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material.specular_color = material_data[3]
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material.specular_intensity = material_data[4]
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material.ambient = material_data[5]
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# Set other material properties based on the PMX data
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mesh.materials.append(material)
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# Create armature and assign bones
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armature = bpy.data.armatures.new(model_name + "_Armature")
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armature_obj = bpy.data.objects.new(model_name + "_Armature", armature)
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bpy.context.collection.objects.link(armature_obj)
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bpy.context.view_layer.objects.active = armature_obj
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bpy.ops.object.mode_set(mode='EDIT')
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for bone_data in bones:
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bone = armature.edit_bones.new(bone_data[0])
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bone.head = bone_data[2]
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bone.tail = bone_data[6]
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if bone_data[3] != -1:
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parent_bone = armature.edit_bones[bone_data[3]]
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bone.parent = parent_bone
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# Set other bone properties based on the PMX data
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bpy.ops.object.mode_set(mode='OBJECT')
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# Assign bone weights to the mesh
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for i, vertex in enumerate(vertices):
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for j in range(4):
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if vertex[3][j] != -1:
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bone_name = bones[vertex[3][j]][0]
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weight = vertex[4][j]
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vertex_group = obj.vertex_groups.get(bone_name)
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if not vertex_group:
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vertex_group = obj.vertex_groups.new(name=bone_name)
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vertex_group.add([i], weight, 'REPLACE')
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# Assign morphs to the mesh
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for morph_data in morphs:
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morph_name = morph_data[0]
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morph_type = morph_data[3]
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if morph_type == 1: # Vertex morph
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shape_key = obj.shape_key_add(name=morph_name)
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for offset_data in morph_data[4]:
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vertex_index = offset_data[0]
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offset = offset_data[1]
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shape_key.data[vertex_index].co += mathutils.Vector(offset)
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# Handle other morph types based on the PMX specification
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print(f"Successfully imported PMX file: {filepath}")
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print(f"Model Name: {model_name}")
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print(f"Model English Name: {model_english_name}")
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print(f"Model Comment: {model_comment}")
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print(f"Model English Comment: {model_english_comment}")
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except Exception as e:
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print(f"Error importing PMX file: {filepath}")
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print(f"Error details: {str(e)}")
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