用maya API获取DAG节点的path和matrix信息

公司来了位在autodesk工作十年的大神，最近给我们培训maya API这块儿的东西，感觉学到不少东西，这是第二节课，她给我们布置的作业是写个带flag的command，具体说就是用api获取选择物体的dagpath，并且添加个flag——verbos，如果有这个flag的话，那么就打出这个物体的inclusiveMatrix和exclusiveMatrix，自己用python API写了一下，又用C++写了下，最后C++在打印矩阵的格式时不是很理想，等以后有时间再完善之，下面分别是二者的代码。

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Python

import sys
import maya.api.OpenMaya as om


def maya_useNewAPI(): pass


class DagInfoCommand(om.MPxCommand):
    commandName = 'dagInfo'

    verbosFlag = '-v'
    verbosFlagLong = '-verbos'

    helpFlag = '-h'
    helpFlagLong = '-help'
    helpText = '\nThe dagInfo command is used to get dag node path and matrix\n'


    def __init__(self):
        om.MPxCommand.__init__(self)

    @staticmethod
    def creator():
        return DagInfoCommand()

    def doIt(self, args):
        try:
            argDatabase = om.MArgDatabase(self.syntax(), args)
        except RuntimeError:
            om.MGlobal.displayError('Error while parsing arguments:\n#\t# If passing in list of nodes, also check that node names exist in scene.')
            raise

        help = argDatabase.isFlagSet(DagInfoCommand.helpFlag)
        if help:
            self.setResult(DagInfoCommand.helpText)
            return

        activeObjects = om.MGlobal.getActiveSelectionList()
        iterObjects = om.MItSelectionList(activeObjects)
        verbos = argDatabase.isFlagSet(DagInfoCommand.verbosFlag)

        while not iterObjects.isDone():
            path = iterObjects.getDagPath()
            fullPath = path.fullPathName()
            p