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November 26, 2025 11:26
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| import bpy | |
| import os | |
| import json | |
| from mathutils import Vector, Matrix | |
| # 選択したオブジェクトを取得 | |
| objects = bpy.context.selected_objects | |
| if not objects or not any(obj.type == 'MESH' for obj in objects): | |
| print("少なくとも1つのメッシュオブジェクトを選択してください") | |
| exit() | |
| # 全オブジェクトのデータを格納 | |
| data = { | |
| "objects": [] | |
| } | |
| # 各オブジェクトを処理 | |
| for obj in objects: | |
| if obj.type != 'MESH': | |
| continue | |
| # モディファイアを適用したメッシュデータを取得 | |
| depsgraph = bpy.context.evaluated_depsgraph_get() | |
| eval_obj = obj.evaluated_get(depsgraph) | |
| mesh = eval_obj.to_mesh(preserve_all_data_layers=True, depsgraph=depsgraph) | |
| # オブジェクトのワールド変換行列を取得 | |
| world_matrix = obj.matrix_world | |
| # 頂点データを収集（トランスフォームを適用） | |
| vertices = [] | |
| for vert in mesh.vertices: | |
| # ローカル座標をワールド座標に変換 | |
| world_co = world_matrix @ vert.co | |
| # vertices.append({ | |
| # "index": vert.index, | |
| # "co": [world_co.x, world_co.y, world_co.z] | |
| # }) | |
| vertices.append([world_co.x, world_co.y, world_co.z]) | |
| # エッジデータを収集 | |
| edges = [] | |
| for edge in mesh.edges: | |
| # edges.append({ | |
| # "index": edge.index, | |
| # "vertices": [edge.vertices[0], edge.vertices[1]] | |
| # }) | |
| edges.append([edge.vertices[0], edge.vertices[1]]) | |
| # 面と法線 | |
| faces = [] | |
| normals = [] | |
| for p in mesh.polygons: | |
| # 法線もワールド座標系に変換 | |
| n_world = obj.matrix_world.to_3x3() @ p.normal | |
| n_world.normalize() | |
| if len(p.vertices) == 3: # 三角形 | |
| faces.append(list(p.vertices)) | |
| normals.append([round(n_world.x, 6), round(n_world.y, 6), round(n_world.z, 6)]) | |
| else: | |
| # 四角形以上を三角形分割 | |
| for i in range(1, len(p.vertices) - 1): | |
| tri = [p.vertices[0], p.vertices[i], p.vertices[i + 1]] | |
| faces.append(tri) | |
| normals.append([round(n_world.x, 6), round(n_world.y, 6), round(n_world.z, 6)]) | |
| # オブジェクトのマテリアルカラー情報を取得（最初のマテリアルスロットを使用） | |
| material_color = [1.0, 1.0, 1.0, 1.0] # デフォルトは白色（RGBA） | |
| if obj.material_slots and obj.material_slots[0].material: | |
| material = obj.material_slots[0].material | |
| if material.use_nodes: | |
| # プリンシプルBSDFノードのベースカラー（デフォルト）を取得 | |
| for node in material.node_tree.nodes: | |
| if node.type == 'BSDF_PRINCIPLED': | |
| base_color = node.inputs['Base Color'].default_value | |
| material_color = [base_color[0], base_color[1], base_color[2], base_color[3]] | |
| break | |
| else: | |
| # ノードを使用しない場合のマテリアルカラー | |
| material_color = list(material.diffuse_color) | |
| # オブジェクトデータを追加 | |
| data["objects"].append({ | |
| "name": obj.name, | |
| "material_color": material_color, | |
| "vertices": vertices, | |
| "edges": edges, | |
| "faces": faces, | |
| "normals": normals | |
| }) | |
| # 一時的なメッシュをクリア | |
| eval_obj.to_mesh_clear() | |
| # JSONファイルに出力 | |
| blend_name = bpy.path.basename(bpy.data.filepath) | |
| base_name = os.path.splitext(blend_name)[0] # 拡張子を除いた部分 | |
| output_path = os.path.join(bpy.path.abspath("//"), f"{base_name}.json") | |
| #output_path = "C:/path/to/output.json" # 出力パスを適宜変更 | |
| try: | |
| with open(output_path, 'w', encoding='utf-8') as f: | |
| json.dump(data, f, indent=4, ensure_ascii=False) | |
| print(f"JSONファイルを出力しました: {output_path}") | |
| except Exception as e: | |
| print(f"ファイル出力エラー: {e}") |
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