OpenMaya：頂点処理の速度比較

以前海外の記述で見つけた記述を参考に、選択頂点で、設定値より近接している頂点の検索処理を、OpenMayaとmayaPythonで比較してみました。

処理内容はどちらも
①選択頂点の座標を取得
②openMayaのMVectorクラスを使って閾値以上近接している頂点を検索
③エラーがあればリストに格納して返す

以下ソース
mayaPython

	import maya.cmds as mc
	import maya.api.OpenMaya as om2
	def checkNearVtx():
	errorList=[]
	vtxList = mc.ls(sl=True,fl=True)
	vtxList2 = vtxList[:]
	for vtx1 in vtxList:
	pos1 = mc.pointPosition(vtx1)
	vec1 = om2.MVector(pos1)
	for vtx2 in vtxList2:
	if vtx1 == vtx2:
	continue
	pos2 = mc.pointPosition(vtx2)
	vec2 = om2.MVector(pos2)
	vec3 = vec1-vec2
	if vec3.length()<0.001:
	errorList.extend([vtx1,vtx2])
	vtxList2.remove(vtx1)
	return errorList
	start = time.time()
	print checkNearVtx()
	elapsed_time = time.time() - start
	print ("elapsed_time:{0}".format(elapsed_time) + "[sec]")

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openMaya

	#_ Import required modules
	import maya.cmds as mc
	import maya.api.OpenMaya as om2
	import time
	def retunrnSelectVtxPos():
	orgSelection = mc.ls(sl=True)
	#getVtx IndxList
	tmp = mc.polyListComponentConversion(orgSelection,tv=True)
	selVtxList = mc.ls(tmp,fl=True)
	selVtxList = sorted(selVtxList)
	selDict = {}
	for vtx in selVtxList:
	shape = vtx.split('.')[0]
	if not shape in selDict.keys():
	selDict[shape] = []
	indx = int(vtx.split('[')[-1].split(']')[0])
	selDict[shape].append(indx)
	returnDict={}
	for shape in selDict.keys():
	mc.select(shape)
	selection = om2.MGlobal.getActiveSelectionList()
	selObj = selection.getDagPath(0)
	mfnObject = om2.MFnMesh(selObj)
	posList = mfnObject.getPoints(om2.MSpace.kWorld)
	returnDict[shape]=[]
	for vtx in selDict[shape]:
	returnDict[shape].append([vtx,posList[vtx]])
	mc.select(orgSelection)
	return returnDict
	def checkNearVtxList(vtxDict):
	errorList=[]
	for key in vtxDict.keys():
	MposList = vtxDict[key]
	MposList2 = MposList[:]
	for vtxInfo1 in MposList:
	indx1 = vtxInfo1[0]
	vec1 = om2.MVector(vtxInfo1[1])
	for vtxInfo2 in MposList2:
	indx2 = vtxInfo2[0]
	if vtxInfo1==vtxInfo2:
	continue
	vec2 = om2.MVector(vtxInfo2[1])
	vec3 = vec1-vec2
	if vec3.length()<0.001:
	vtx1 = '%s.vtx[%s]'%(key,indx1)
	vtx2 = '%s.vtx[%s]'%(key,indx2)
	errorList.extend([vtx1,vtx2])
	MposList2.remove(vtxInfo1)
	errorList = list(set(errorList))
	return errorList
	start = time.time()
	dict = retunrnSelectVtxPos()
	print checkNearVtxList(dict)
	elapsed_time = time.time() - start
	print ("elapsed_time:{0}".format(elapsed_time) + "[sec]")

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で、結果。
mayaPythonの結果： elapsed_time:1.26999998093[sec]
openMayaの結果： elapsed_time:0.103000164032[sec]

うーん！ これだけで10倍以上の処理速度の差が。
 ソースはもっと洗練できると思う。 もっと早くなるんじゃないだろか。
参考；
http://jensvhansen.com/fastest-way-to-query-vertex-position-in-maya/
https://boomrigs.com/blog/2016/1/12/how-to-get-mesh-vertex-position-through-maya-api