python - API导出问题

Question

我需要有人提供有关我的导出问题的专业知识。

工作原理:选择一个摄像机(是否有动画可选)>>文件>>导出选择>>文件类型:.chan(需要将此脚本作为插件加载)

这就是问题开始的地方。它能够创建一个 .text 文件，但是，它不会“导出”或将内容写入文本文件，并且文件大小为零字节。

我正在利用当前已编码的 API，修改代码以添加一些 Maya cmd

有人可以帮我吗？

import math, sys, string, os

import maya.OpenMaya as OpenMaya
import maya.OpenMayaMPx as OpenMayaMPx
import maya.OpenMayaAnim as OpenMayaAnim

import maya.cmds as cmds
import maya.mel as mel

kPluginTranslatorTypeName = "chan Export/Import"
kVersionNumber = "0.5a"

camSel = []
win_name = "chan_window"

class CustomNodeTranslator(OpenMayaMPx.MPxFileTranslator):   
    def __init__(self):
        OpenMayaMPx.MPxFileTranslator.__init__(self)       
    def haveWriteMethod(self):
        return True
    def haveReadMethod(self):
        return True
    def filter(self):
        return " .chan"
    def defaultExtension(self):
        return "chan"
    def writer( self, fileObject, optionString, accessMode ):
        try:

            fullName = fileObject.fullName()
            fileHandle = open(fullName,"w")

            selectList = OpenMaya.MSelectionList()

            OpenMaya.MGlobal.getActiveSelectionList(selectList)
            node = OpenMaya.MObject()
            depFn = OpenMaya.MFnDependencyNode()
            path = OpenMaya.MDagPath()
            iterator = OpenMaya.MItSelectionList(selectList)

            animationTime = OpenMayaAnim.MAnimControl()

            maxTime = int(animationTime.maxTime().value())
            minTime = int(animationTime.minTime().value())

            while (iterator.isDone() == 0):

                iterator.getDependNode(node)

                depFn.setObject(node)

                iterator.getDagPath(path, node)

                cameraObject = OpenMaya.MFnCamera(path)

                transform = OpenMaya.MFnTransform(path)

                chanMe = fileExporter(transform, minTime, maxTime, cameraObject)

                for all in chanMe():
                    fileHandle.write(all)

                iterator.next()

            fileHandle.close()

        except:
            sys.stderr.write( "Failed to write file information\n")
            raise

    def processLine( self, lineStr ):

        self.importTheChan.writeFrameData(lineStr)


class fileExporter():
    """ module for exporting chan files from application. arguments: object, startFrame, endFrame """

    def __init__(self, transform, startAnimation, endAnimation, cameraObj):
        self.fileExport = []
        self.transform = transform
        self.cameraObj = cameraObj
        self.start = startAnimation
        self.end = endAnimation
        self.exportWin()

    def exportWin(self):
        self.expWindow = cmds.window(w=150, h=100, title = "Export Selection" )
        cmds.columnLayout( adjustableColumn=True )
        form = cmds.formLayout(numberOfDivisions=100)
        cmds.radioCollection()
        self.chk1 = cmds.radioButton( label='option1', onc = self.opt1On, ofc = self.opt1Off )
        self.chk2 = cmds.radioButton( label='option2', onc = self.opt2On, ofc = self.opt2Off )
        self.okayBtn = cmds.button(label='okay!', command=self.runSel, width=150, height=35)

        cmds.formLayout(form, edit=True, attachForm=[\
        (self.chk1, 'top', 15),\
        (self.chk1, 'left', 15),\
        (self.chk2, 'top', 30),\
        (self.chk2, 'left', 15),\
        (self.okayBtn, 'top', 50),\
        (self.okayBtn, 'left', 15)])

        cmds.showWindow( self.expWindow )

    def opt1On(self,  args):
        print "User checked option1"

        startAnimation = cmds.playbackOptions(query=True, minTime=True)
        endAnimation = cmds.playbackOptions(query=True, maxTime=True)

        self.start = startAnimation
        self.end = endAnimation

    def opt1Off(self,  args):
        print "User un-checked option1"
        cmds.radioButton(self.chk2, edit = True, enable = True)
        self.start = ""
        self.end = ""

    def opt2On(self,  args):
        print "User checked option2"
        startAnimation = cmds.findKeyframe(which='first')
        endAnimation = cmds.findKeyframe(which='last')

        self.start = startAnimation
        self.end = endAnimation

        #self.start.append(int(startAnimation))
        #self.end.append(int(endAnimation))

    def opt2Off(self,  args):
        print "User un-checked option2"
        self.start = ""
        self.end = ""

    def runSel(self,  args):
        chkVal1 = cmds.radioButton(self.chk1, query=True, sl=1)
        chkVal2 = cmds.radioButton(self.chk2, query=True, sl=1)

        if chkVal1 == 1:
            print "opt1 Pressed!"      
            print self.start
            print self.end
            self.test()
            self.closeWindow()

        elif chkVal2 == 1:
            print "opt2 Pressed!"
            print self.start
            print self.end
            self.test()
            self.closeWindow()

        else:
            cmds.warning("Check an option")

    def closeWindow(self):
        cmds.deleteUI(self.expWindow, window=True)

    def test(self):
        self.actualExp(self.transform, self.start, self.end, self.cameraObj)


    def actualExp(self, transform, startAnimation, endAnimation, cameraObj):
        mayaGlobal = OpenMaya.MGlobal()
        mayaGlobal.viewFrame(OpenMaya.MTime(1))

        # Converts the float arguement into integer
        for i in range(int(startAnimation), int(endAnimation + 1)):

            focalLength = cameraObj.focalLength()

            vFilmApp = cameraObj.verticalFilmAperture()

            focalOut = 2  math.degrees(math.atan(vFilmApp   25.4/ (2  focalLength)))

            myEuler = OpenMaya.MEulerRotation()
            spc = OpenMaya.MSpace.kWorld

            trans = transform.getTranslation(spc)

            rotation = transform.getRotation(myEuler)
            rotVector = OpenMaya.MVector(myEuler.asVector())

            self.fileExport.append((str(i) + '\t' + str(trans[0]) + "\t" + str(trans[1]) + "\t" + str(trans[2]) + "\t" + str(math.degrees(rotVector[0])) + "\t" + str(math.degrees(rotVector[1])) + "\t" + str(math.degrees(rotVector[2])) + "\t" + str(focalOut) + "\n"))

            mayaGlobal.viewFrame(OpenMaya.MTime(i+1))

    def __call__(self,  args):
        return self.fileExport

    def radianToDegree(self, radians):
        outDegrees = 0.0
        outDegrees = (float(radians) / (math.pi)) 180
        return outDegrees


# creator
def translatorCreator():
    return OpenMayaMPx.asMPxPtr( CustomNodeTranslator() )

# initialize the script plug-in
def initializePlugin(mobject):
    mplugin = OpenMayaMPx.MFnPlugin(mobject)

    try:
        mplugin.registerFileTranslator(kPluginTranslatorTypeName, None, translatorCreator)
    except:
        sys.stderr.write( "Failed to register translator: %s" % kPluginTranslatorTypeName )
        raise

# uninitialize the script plug-in
def uninitializePlugin(mobject):
    mplugin = OpenMayaMPx.MFnPlugin(mobject)
    try:
        mplugin.deregisterFileTranslator( kPluginTranslatorTypeName )
    except:
        sys.stderr.write( "Failed to deregister translator: %s" % kPluginTranslatorTypeName )
        raise

Answer 1

__call__ 方法应该提供文件的内容。它返回 self.fileExport，这是一个未填充的空列表。