{"id":7,"date":"2017-09-14T20:28:34","date_gmt":"2017-09-14T11:28:34","guid":{"rendered":"http:\/\/www.sciement.com\/tech-blog\/?p=7"},"modified":"2017-12-21T17:38:50","modified_gmt":"2017-12-21T08:38:50","slug":"getclosestpoint","status":"publish","type":"post","link":"https:\/\/www.sciement.com\/tech-blog\/maya\/getclosestpoint\/","title":{"rendered":"[Maya][Python]\u70b9\u304b\u3089\u30e1\u30c3\u30b7\u30e5\u8868\u9762\u306e\u6700\u3082\u8fd1\u3044\u70b9\u3092\u53d6\u5f97\u3059\u308b"},"content":{"rendered":"

Python\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u884c\u3044\u305f\u3044\u5834\u5408\u306e\u304a\u8a71\u3002
\n\u3061\u3087\u3063\u3068\u691c\u7d22\u3059\u308c\u3070getClosestPoint\u3092\u4f7f\u3046\u306e\u304c\u826f\u3044\u3068\u3059\u3050\u306b\u5206\u304b\u308a\u307e\u3059\u3002
\n\u304c\u3001\u305d\u306e\u305f\u3081\u306b\u306fMaya Python API\u3092\u4f7f\u308f\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002
\n\u95a2\u9023\u3057\u305f\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3082\u691c\u7d22\u3059\u308c\u3070\u3044\u304f\u3064\u304b\u51fa\u3066\u304d\u307e\u3059\u3002<\/p>\n

djx blog \u00bb get closest vertex in maya using python<\/strong><\/a><\/p>\n

\u3010OpenMaya\u3011ClosestPoint\u306f\u5927\u4e8b\uff01 | \u30ea\u30b0\u30ed\u30b0\uff01<\/strong><\/a><\/p>\n

\u3010Maya Python API2.0\u3011 \u9078\u629e\u3057\u305f\u9802\u70b9\u306e\u53cd\u5bfe\u5074\u306e\u6700\u8fd1\u63a5\u9802\u70b9\u3092\u691c\u7d22\u3057\u3001\u5de6\u53f3\u5bfe\u79f0\u306b\u3059\u308b\u3002<\/strong><\/a><\/p>\n

\u3042\u308b1\u3064\u306e\u30e1\u30c3\u30b7\u30e5\u306b\u5bfe\u3057\u3066\u3001\u8907\u6570\u306e\u70b9\u3067\u305d\u308c\u305e\u308c\u3001\u30e1\u30c3\u30b7\u30e5\u306e\u6700\u8fd1\u70b9\u3092\u53d6\u5f97\u3057\u305f\u3044\u3068\u3044\u3046\u5834\u5408\u304c\u3042\u308b\u306e\u3067\u3001\u4eca\u56de\u306f\u30af\u30e9\u30b9\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n

import maya.api.OpenMaya as om\r\nimport numpy as np\r\n\r\n\r\nclass ClosestVertexOnMesh:\r\n    def __init__(self, target_polygon_name):\r\n        self.closest_point = None\r\n        self.closest_face_ID = None\r\n        self.closest_vertex_ID = None\r\n        self.closest_vertex_coordinate = None\r\n        self.closest_distance = float('inf')\r\n\r\n        selection_list = om.MSelectionList()\r\n        selection_list.add(target_polygon_name)\r\n\r\n        self.DAG_path = selection_list.getDagPath(0)\r\n        # self.DAG_path_to_shape = self.DAG_path.extendToShape()\r\n\r\n        self.target_shape = om.MFnMesh(self.DAG_path)\r\n\r\n        selection_list.clear()\r\n\r\n    def __get_vertices_id_and_Mcoordinate_from_face_id(self, face_ID):\r\n        mesh_face_iterator = om.MItMeshPolygon(self.DAG_path)\r\n        mesh_face_iterator.setIndex(face_ID)\r\n        face_vertices_ID = mesh_face_iterator.getVertices()\r\n        face_vertices_Mcoordinate = mesh_face_iterator.getPoints(om.MSpace.kWorld)\r\n        ID_to_Mcoordinate = {}\r\n        i = 0\r\n        for vertex_ID in face_vertices_ID:\r\n            ID_to_Mcoordinate[vertex_ID] = face_vertices_Mcoordinate[i]\r\n            i += 1\r\n        return ID_to_Mcoordinate\r\n\r\n    def calculate(self, target_coordinate):\r\n        target_MPoint = om.MPoint(target_coordinate[0], target_coordinate[1], target_coordinate[2])\r\n        closest_MPoint, self.closest_face_ID = self.target_shape.getClosestPoint(target_MPoint, om.MSpace.kWorld)\r\n        self.closest_point = np.array(list(closest_MPoint)[:3])\r\n\r\n        candidate_vertices_ID_and_Mcoordinate = self.__get_vertices_id_and_Mcoordinate_from_face_id(self.closest_face_ID)\r\n\r\n        for id, Mcoordinate in candidate_vertices_ID_and_Mcoordinate.items():\r\n            distance = target_MPoint.distanceTo(Mcoordinate)\r\n            if distance < self.closest_distance:\r\n                self.closest_distance = distance\r\n                self.closest_vertex_ID = id\r\n                self.closest_vertex_coordinate = np.array(list(Mcoordinate)[:3])<\/pre>\n
getClosestPoint\u3092\u4f7f\u3046\u305f\u3081\u306b\u306f\u3001\u307e\u305aMFnMesh\u3068\u3044\u3046\u30af\u30e9\u30b9\u306b\u30e1\u30c3\u30b7\u30e5\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\ntarget_shape = om.MFnMesh(‘pSphere1Shape’)<\/span>
\n\u3068\u51fa\u6765\u305f\u3089\u7c21\u5358\u306a\u306e\u3067\u3059\u304c\u3001API\u3092\u4f7f\u3046\u5834\u5408\u306f\u6b8b\u5ff5\u306a\u304c\u3089\u305d\u3046\u7c21\u5358\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002
\nOpenMaya.MFnMesh Class Reference<\/a>\u3092\u898b\u3066\u307f\u308b\u3068\u3001MDagPath\u578b\u304bMObject\u578b\u3067\u6307\u5b9a\u3057\u308d\u3068\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u306a\u3093\u3060\u305d\u308c\uff1f\u3068\u306a\u308b\u308f\u3051\u3067\u3059\u304c\u30011\u30641\u3064\u4e01\u5be7\u306b\u9061\u3063\u3066\u3044\u3051\u3070\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n
        selection_list = om.MSelectionList()\r\n        selection_list.add(target_polygon_name)\r\n\r\n        self.DAG_path = selection_list.getDagPath(0)\r\n        # self.DAG_path_to_shape = self.DAG_path.extendToShape()\r\n\r\n        self.target_shape = om.MFnMesh(self.DAG_path)\r\n<\/pre>\n
\u3053\u308c\u3067\u4e0b\u6e96\u5099\u3057\u3066\u3084\u308a\u307e\u3059\u3002
\nselection_list = om.MSelectionList(target_polygon_name)<\/span>
\n\u3068\u66f8\u304d\u305f\u3044\u3068\u3053\u308d\u3067\u3059\u304c\u3001MSelectionList\u306f\u5f15\u6570\u306a\u3057\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304b\u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3057\u304b\u7121\u3044\u3068\u306e\u3053\u3068\u3067\uff08OpenMaya.MSelectionList Class Reference<\/a>\uff09\u30012\u884c\u306b\u5206\u3051\u3066\u66f8\u304d\u307e\u3059\u3002\u9069\u5b9cAPI\u306eReference\u3092\u898b\u306a\u304c\u3089\u3084\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002
\nMDagPath\u306f\u3053\u306e\u3088\u3046\u306bMSelectionList\u3092\u901a\u3057\u3066\u5f97\u308b\u306e\u304c\u826f\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u306a\u304a\u3001\u3053\u308c\u3060\u3068Transform\u30ce\u30fc\u30c9\u306eMDagPath\u304c\u53d6\u5f97\u3055\u308c\u3001mesh\u30ce\u30fc\u30c9\uff08shape\u30ce\u30fc\u30c9\uff09\u306b\u306f\u306a\u3089\u305a\u3001
\n\u7b2c68\u56de\uff1aAttribute\u3068Plug\u306b\u3064\u3044\u3066\u8a9e\u308b | \u8aad\u3093\u3067\u89e6\u3063\u3066\u3088\u304f\u308f\u304b\u308b\uff01Maya\u3092\u4f7f\u3044\u3053\u306a\u3059\u70ba\u306eAtoZ | AREA JAPAN<\/a>
\n\u3092\u8aad\u3080\u3068
\n.extendToShape()<\/span>
\n\u3067mesh\u30ce\u30fc\u30c9\u306e\u30d1\u30b9\u3092\u53d6\u5f97\u51fa\u6765\u308b\u3068\u66f8\u304b\u308c\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001Transform\u30ce\u30fc\u30c9\u3078\u306e\u30d1\u30b9\u3067\u3082\u554f\u984c\u306a\u304f\u51fa\u6765\u307e\u3057\u305f\u3002<\/p>\n
\u5ea7\u6a19\u306e\u6307\u5b9a\u306b\u306fMPoint\u3068\u3044\u3046\u578b\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308b\u305d\u3046\u3067\u3001<\/p>\n
        target_MPoint = om.MPoint(target_coordinate[0], target_coordinate[1], target_coordinate[2])\r\n        closest_MPoint, self.closest_face_ID = self.target_shape.getClosestPoint(target_MPoint, om.MSpace.kWorld)\r\n        self.closest_point = np.array(list(closest_MPoint)[:3])<\/pre>\n
\u3067target_coordinate\u3092MPoint\u578b\u306b\u5909\u63db\u3057\u3066\u304b\u3089\u3001getClosestPoint\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002
\nAPI Reference\u306b\u306f<\/p>\n
getClosestPoint(MPoint, space=MSpace.kObject) -> (MPoint, int)
\nReturns a tuple containing the closest point on the mesh to the
\ngiven point and the ID of the face in which that closest point lies.<\/p><\/blockquote>\n
\u3068\u66f8\u304b\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u306e\u901a\u308a\u66f8\u3051\u3070OK\u3067\u3059\u3002MSpace.kObject\u3068\u3044\u3046\u306e\u3082API Reference\u3092\u8aad\u3081\u3070\u308f\u304b\u308a\u307e\u3059\u3002\u3069\u306e\u5ea7\u6a19\u7cfb\u3092\u4f7f\u3046\u304b\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e\u5b9a\u6570\u3067\u3001\u30ef\u30fc\u30eb\u30c9\u5ea7\u6a19\u304c\u6b32\u3057\u3051\u308c\u3070om.MSpace.kWorld\uff08\u305f\u3060\u306e\u5b9a\u6570\u5024\uff09\u3068\u6307\u5b9a\u3059\u308c\u3070\u826f\u3044\u3067\u3059\u3002
\n\u6700\u5f8c\u306e
\n self.closest_point = np.array(list(closest_MPoint)[:3])<\/span>
\n\u306f\u3001MPoint\u578b\u3092NumPy\u7528\u306b\u5909\u63db\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002[:3]\u3068\u306a\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u5ea7\u6a19\u5024\u3068\u3057\u3066x, y, z, w\u306e4\u3064\u304c\u8fd4\u3063\u3066\u304f\u308b\u304b\u3089\u3067\u3059\u3002w\u306f\u30a2\u30d5\u30a3\u30f3\u5909\u63db\u7528\u306e1\u306a\u306e\u3060\u3068\u601d\u3046\u306e\u3067\u304c\u3001\u81ea\u4fe1\u304c\u3042\u308a\u307e\u305b\u3093\u3002
\n\u3044\u305a\u308c\u306b\u3057\u3066\u3082\u5fc5\u8981\u306a\u306e\u306fw\u3092\u9664\u3044\u305f\u6700\u521d\u306e3\u3064\u3067\u3059\u3002<\/p>\n
\u3053\u3053\u3067\u6ce8\u610f\u3059\u3079\u304d\u306f\u3001\u6700\u521d\u3001getClosestPoint\u306f\u4e00\u756a\u8fd1\u3044\u9802\u70b9\u306e\u5ea7\u6a19\u3092\u8fd4\u3057\u3066\u304f\u308b\u3082\u306e\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u9802\u70b9\u3067\u306f\u306a\u304f\u3001\u30e1\u30c3\u30b7\u30e5\u4e0a\u3067\u672c\u5f53\u306b\u4e00\u756a\u8fd1\u3044\u70b9\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002
\n\u305d\u308c\u306b\u52a0\u3048\u3066\u3001\u305d\u306e\u70b9\u304c\u4e57\u3063\u3066\u3044\u308b\u30dd\u30ea\u30b4\u30f3\u306eindex\u3082\u53d6\u5f97\u51fa\u6765\u307e\u3059\uff08\u4e00\u756a\u8fd1\u3044\u70b9\u304c\u3061\u3087\u3046\u3069\u9802\u70b9\u306b\u3074\u3063\u305f\u308a\u4e00\u81f4\u3057\u305f\u5834\u5408\u306b\u306f\u8907\u6570\u306e\u30dd\u30ea\u30b4\u30f3\u304c\u8a72\u5f53\u3059\u308b\u6c17\u304c\u3057\u307e\u3059\u304c\u3001\u305d\u3093\u306a\u3053\u3068\u306f\u6ec5\u591a\u306b\u306a\u3044\u306e\u3060\u3068\u601d\u3044\u307e\u3059\uff09\u3002<\/p>\n
\u306a\u306e\u3067\u3001\u6700\u3082\u8fd1\u3044\u9802\u70b9\u3092\u53d6\u5f97\u3057\u305f\u3051\u308c\u3070\u3001\u30dd\u30ea\u30b4\u30f3\u306eindex\u304b\u3089\u3001\u305d\u306e\u30dd\u30ea\u30b4\u30f3\u3092\u751f\u6210\u3057\u3066\u3044\u308b\u9802\u70b9\u3092\u53d6\u5f97\u3057\u3066\u3001\u9577\u3055\u3092\u6e2c\u308c\u3070\u826f\u3044\u308f\u3051\u3067\u3059\u3002
\n\u9802\u70b9\u306e\u53d6\u5f97\u51e6\u7406\u3092
\n__get_vertices_id_and_Mcoordinate_from_face_id<\/span>
\n\u306b\u307e\u3068\u3081\u307e\u3057\u305f\u3002
\n\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u3044\u307e\u3059\u3002
\n5 \u3064\u306e\u57fa\u672c\u30dd\u30ea\u30b4\u30f3 API \u30af\u30e9\u30b9<\/a>\u3068\u3057\u3066\u65e5\u672c\u8a9e\u30d8\u30eb\u30d7\u3082\u3042\u308b\u304f\u3089\u3044\u3001\u57fa\u672c\u306e\u57fa\u672c\u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n
        mesh_face_iterator = om.MItMeshPolygon(self.DAG_path)\r\n        mesh_face_iterator.setIndex(face_ID)\r\n        face_vertices_ID = mesh_face_iterator.getVertices()\r\n        face_vertices_Mcoordinate = mesh_face_iterator.getPoints(om.MSpace.kWorld)<\/pre>\n
\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u521d\u671f\u5316\u306b\u306f\u3053\u3053\u3067\u3082MDagPath\u578b\u3067\u30e1\u30c3\u30b7\u30e5\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\nsetIndex\u3067\u30dd\u30ea\u30b4\u30f3\u306eID\u3092\u6307\u5b9a\u3057\u3066getVertices\u3067\u9802\u70b9\u306eID\u3092\u3001getPoints\u3067\u9802\u70b9\u306e\u5ea7\u6a19\u3092\u53d6\u5f97\u51fa\u6765\u307e\u3059\u3002
\n\u9802\u70b9\u5ea7\u6a19\u306e\u53d6\u5f97\u6642\u306b\u306f\u3001\u3069\u306e\u5ea7\u6a19\u7cfb\u3092\u4f7f\u3046\u304b\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u518d\u3073om.MSpace.kWorld\u304c\u51fa\u3066\u304d\u307e\u3059\u3002<\/p>\n
Maya Python API\u306f\u6700\u521d\u306f\u306a\u304b\u306a\u304b\u53d6\u3063\u3064\u304d\u306b\u304f\u3044\u30a4\u30e1\u30fc\u30b8\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u4e01\u5be7\u306b\u8fbf\u3063\u3066\u3044\u3051\u3070\u304d\u3061\u3093\u3068\u7406\u89e3\u3057\u306a\u304c\u3089\u66f8\u304f\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3057\u3001\u5b9f\u884c\u901f\u5ea6\u304c\u3081\u3061\u3083\u304f\u3061\u3083\u901f\u3044\u3067\u3059\u3002
\n4,5000\u30dd\u30ea\u30b4\u30f3\u306e\u30e1\u30c3\u30b7\u30e5\u306b\u5bfe\u3057\u3066ClosestVertexOnMesh.calculate\u30921,000\u56de\u7e70\u308a\u8fd4\u3057\u3066\u307f\u3066\u30825\u79d2\u7a0b\u5ea6\u3067\u7d42\u308f\u308a\u307e\u3057\u305f\u3002<\/p>\n
\n
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